| /* |
| * Copyright (c) 2016-present, Yann Collet, Facebook, Inc. |
| * All rights reserved. |
| * |
| * This source code is licensed under both the BSD-style license (found in the |
| * LICENSE file in the root directory of this source tree) and the GPLv2 (found |
| * in the COPYING file in the root directory of this source tree). |
| * You may select, at your option, one of the above-listed licenses. |
| */ |
| |
| |
| /* ====== Tuning parameters ====== */ |
| #define ZSTDMT_NBTHREADS_MAX 200 |
| #define ZSTDMT_JOBSIZE_MAX (MEM_32bits() ? (512 MB) : (2 GB)) /* note : limited by `jobSize` type, which is `unsigned` */ |
| #define ZSTDMT_OVERLAPLOG_DEFAULT 6 |
| |
| |
| /* ====== Compiler specifics ====== */ |
| #if defined(_MSC_VER) |
| # pragma warning(disable : 4204) /* disable: C4204: non-constant aggregate initializer */ |
| #endif |
| |
| |
| /* ====== Dependencies ====== */ |
| #include <string.h> /* memcpy, memset */ |
| #include <limits.h> /* INT_MAX */ |
| #include "pool.h" /* threadpool */ |
| #include "threading.h" /* mutex */ |
| #include "zstd_compress_internal.h" /* MIN, ERROR, ZSTD_*, ZSTD_highbit32 */ |
| #include "zstdmt_compress.h" |
| |
| |
| /* ====== Debug ====== */ |
| #if defined(ZSTD_DEBUG) && (ZSTD_DEBUG>=2) |
| |
| # include <stdio.h> |
| # include <unistd.h> |
| # include <sys/times.h> |
| # define DEBUGLOGRAW(l, ...) if (l<=ZSTD_DEBUG) { fprintf(stderr, __VA_ARGS__); } |
| |
| # define DEBUG_PRINTHEX(l,p,n) { \ |
| unsigned debug_u; \ |
| for (debug_u=0; debug_u<(n); debug_u++) \ |
| DEBUGLOGRAW(l, "%02X ", ((const unsigned char*)(p))[debug_u]); \ |
| DEBUGLOGRAW(l, " \n"); \ |
| } |
| |
| static unsigned long long GetCurrentClockTimeMicroseconds(void) |
| { |
| static clock_t _ticksPerSecond = 0; |
| if (_ticksPerSecond <= 0) _ticksPerSecond = sysconf(_SC_CLK_TCK); |
| |
| { struct tms junk; clock_t newTicks = (clock_t) times(&junk); |
| return ((((unsigned long long)newTicks)*(1000000))/_ticksPerSecond); } |
| } |
| |
| #define MUTEX_WAIT_TIME_DLEVEL 6 |
| #define ZSTD_PTHREAD_MUTEX_LOCK(mutex) { \ |
| if (ZSTD_DEBUG >= MUTEX_WAIT_TIME_DLEVEL) { \ |
| unsigned long long const beforeTime = GetCurrentClockTimeMicroseconds(); \ |
| ZSTD_pthread_mutex_lock(mutex); \ |
| { unsigned long long const afterTime = GetCurrentClockTimeMicroseconds(); \ |
| unsigned long long const elapsedTime = (afterTime-beforeTime); \ |
| if (elapsedTime > 1000) { /* or whatever threshold you like; I'm using 1 millisecond here */ \ |
| DEBUGLOG(MUTEX_WAIT_TIME_DLEVEL, "Thread took %llu microseconds to acquire mutex %s \n", \ |
| elapsedTime, #mutex); \ |
| } } \ |
| } else { \ |
| ZSTD_pthread_mutex_lock(mutex); \ |
| } \ |
| } |
| |
| #else |
| |
| # define ZSTD_PTHREAD_MUTEX_LOCK(m) ZSTD_pthread_mutex_lock(m) |
| # define DEBUG_PRINTHEX(l,p,n) {} |
| |
| #endif |
| |
| |
| /* ===== Buffer Pool ===== */ |
| /* a single Buffer Pool can be invoked from multiple threads in parallel */ |
| |
| typedef struct buffer_s { |
| void* start; |
| size_t capacity; |
| } buffer_t; |
| |
| static const buffer_t g_nullBuffer = { NULL, 0 }; |
| |
| typedef struct ZSTDMT_bufferPool_s { |
| ZSTD_pthread_mutex_t poolMutex; |
| size_t bufferSize; |
| unsigned totalBuffers; |
| unsigned nbBuffers; |
| ZSTD_customMem cMem; |
| buffer_t bTable[1]; /* variable size */ |
| } ZSTDMT_bufferPool; |
| |
| static ZSTDMT_bufferPool* ZSTDMT_createBufferPool(unsigned nbThreads, ZSTD_customMem cMem) |
| { |
| unsigned const maxNbBuffers = 2*nbThreads + 3; |
| ZSTDMT_bufferPool* const bufPool = (ZSTDMT_bufferPool*)ZSTD_calloc( |
| sizeof(ZSTDMT_bufferPool) + (maxNbBuffers-1) * sizeof(buffer_t), cMem); |
| if (bufPool==NULL) return NULL; |
| if (ZSTD_pthread_mutex_init(&bufPool->poolMutex, NULL)) { |
| ZSTD_free(bufPool, cMem); |
| return NULL; |
| } |
| bufPool->bufferSize = 64 KB; |
| bufPool->totalBuffers = maxNbBuffers; |
| bufPool->nbBuffers = 0; |
| bufPool->cMem = cMem; |
| return bufPool; |
| } |
| |
| static void ZSTDMT_freeBufferPool(ZSTDMT_bufferPool* bufPool) |
| { |
| unsigned u; |
| DEBUGLOG(3, "ZSTDMT_freeBufferPool (address:%08X)", (U32)(size_t)bufPool); |
| if (!bufPool) return; /* compatibility with free on NULL */ |
| for (u=0; u<bufPool->totalBuffers; u++) { |
| DEBUGLOG(4, "free buffer %2u (address:%08X)", u, (U32)(size_t)bufPool->bTable[u].start); |
| ZSTD_free(bufPool->bTable[u].start, bufPool->cMem); |
| } |
| ZSTD_pthread_mutex_destroy(&bufPool->poolMutex); |
| ZSTD_free(bufPool, bufPool->cMem); |
| } |
| |
| /* only works at initialization, not during compression */ |
| static size_t ZSTDMT_sizeof_bufferPool(ZSTDMT_bufferPool* bufPool) |
| { |
| size_t const poolSize = sizeof(*bufPool) |
| + (bufPool->totalBuffers - 1) * sizeof(buffer_t); |
| unsigned u; |
| size_t totalBufferSize = 0; |
| ZSTD_pthread_mutex_lock(&bufPool->poolMutex); |
| for (u=0; u<bufPool->totalBuffers; u++) |
| totalBufferSize += bufPool->bTable[u].capacity; |
| ZSTD_pthread_mutex_unlock(&bufPool->poolMutex); |
| |
| return poolSize + totalBufferSize; |
| } |
| |
| /* ZSTDMT_setBufferSize() : |
| * all future buffers provided by this buffer pool will have _at least_ this size |
| * note : it's better for all buffers to have same size, |
| * as they become freely interchangeable, reducing malloc/free usages and memory fragmentation */ |
| static void ZSTDMT_setBufferSize(ZSTDMT_bufferPool* const bufPool, size_t const bSize) |
| { |
| ZSTD_pthread_mutex_lock(&bufPool->poolMutex); |
| DEBUGLOG(4, "ZSTDMT_setBufferSize: bSize = %u", (U32)bSize); |
| bufPool->bufferSize = bSize; |
| ZSTD_pthread_mutex_unlock(&bufPool->poolMutex); |
| } |
| |
| /** ZSTDMT_getBuffer() : |
| * assumption : bufPool must be valid |
| * @return : a buffer, with start pointer and size |
| * note: allocation may fail, in this case, start==NULL and size==0 */ |
| static buffer_t ZSTDMT_getBuffer(ZSTDMT_bufferPool* bufPool) |
| { |
| size_t const bSize = bufPool->bufferSize; |
| DEBUGLOG(5, "ZSTDMT_getBuffer: bSize = %u", (U32)bufPool->bufferSize); |
| ZSTD_pthread_mutex_lock(&bufPool->poolMutex); |
| if (bufPool->nbBuffers) { /* try to use an existing buffer */ |
| buffer_t const buf = bufPool->bTable[--(bufPool->nbBuffers)]; |
| size_t const availBufferSize = buf.capacity; |
| bufPool->bTable[bufPool->nbBuffers] = g_nullBuffer; |
| if ((availBufferSize >= bSize) & ((availBufferSize>>3) <= bSize)) { |
| /* large enough, but not too much */ |
| DEBUGLOG(5, "ZSTDMT_getBuffer: provide buffer %u of size %u", |
| bufPool->nbBuffers, (U32)buf.capacity); |
| ZSTD_pthread_mutex_unlock(&bufPool->poolMutex); |
| return buf; |
| } |
| /* size conditions not respected : scratch this buffer, create new one */ |
| DEBUGLOG(5, "ZSTDMT_getBuffer: existing buffer does not meet size conditions => freeing"); |
| ZSTD_free(buf.start, bufPool->cMem); |
| } |
| ZSTD_pthread_mutex_unlock(&bufPool->poolMutex); |
| /* create new buffer */ |
| DEBUGLOG(5, "ZSTDMT_getBuffer: create a new buffer"); |
| { buffer_t buffer; |
| void* const start = ZSTD_malloc(bSize, bufPool->cMem); |
| buffer.start = start; /* note : start can be NULL if malloc fails ! */ |
| buffer.capacity = (start==NULL) ? 0 : bSize; |
| if (start==NULL) { |
| DEBUGLOG(5, "ZSTDMT_getBuffer: buffer allocation failure !!"); |
| } else { |
| DEBUGLOG(5, "ZSTDMT_getBuffer: created buffer of size %u", (U32)bSize); |
| } |
| return buffer; |
| } |
| } |
| |
| /* store buffer for later re-use, up to pool capacity */ |
| static void ZSTDMT_releaseBuffer(ZSTDMT_bufferPool* bufPool, buffer_t buf) |
| { |
| if (buf.start == NULL) return; /* compatible with release on NULL */ |
| DEBUGLOG(5, "ZSTDMT_releaseBuffer"); |
| ZSTD_pthread_mutex_lock(&bufPool->poolMutex); |
| if (bufPool->nbBuffers < bufPool->totalBuffers) { |
| bufPool->bTable[bufPool->nbBuffers++] = buf; /* stored for later use */ |
| DEBUGLOG(5, "ZSTDMT_releaseBuffer: stored buffer of size %u in slot %u", |
| (U32)buf.capacity, (U32)(bufPool->nbBuffers-1)); |
| ZSTD_pthread_mutex_unlock(&bufPool->poolMutex); |
| return; |
| } |
| ZSTD_pthread_mutex_unlock(&bufPool->poolMutex); |
| /* Reached bufferPool capacity (should not happen) */ |
| DEBUGLOG(5, "ZSTDMT_releaseBuffer: pool capacity reached => freeing "); |
| ZSTD_free(buf.start, bufPool->cMem); |
| } |
| |
| |
| /* ===== CCtx Pool ===== */ |
| /* a single CCtx Pool can be invoked from multiple threads in parallel */ |
| |
| typedef struct { |
| ZSTD_pthread_mutex_t poolMutex; |
| unsigned totalCCtx; |
| unsigned availCCtx; |
| ZSTD_customMem cMem; |
| ZSTD_CCtx* cctx[1]; /* variable size */ |
| } ZSTDMT_CCtxPool; |
| |
| /* note : all CCtx borrowed from the pool should be released back to the pool _before_ freeing the pool */ |
| static void ZSTDMT_freeCCtxPool(ZSTDMT_CCtxPool* pool) |
| { |
| unsigned u; |
| for (u=0; u<pool->totalCCtx; u++) |
| ZSTD_freeCCtx(pool->cctx[u]); /* note : compatible with free on NULL */ |
| ZSTD_pthread_mutex_destroy(&pool->poolMutex); |
| ZSTD_free(pool, pool->cMem); |
| } |
| |
| /* ZSTDMT_createCCtxPool() : |
| * implies nbThreads >= 1 , checked by caller ZSTDMT_createCCtx() */ |
| static ZSTDMT_CCtxPool* ZSTDMT_createCCtxPool(unsigned nbThreads, |
| ZSTD_customMem cMem) |
| { |
| ZSTDMT_CCtxPool* const cctxPool = (ZSTDMT_CCtxPool*) ZSTD_calloc( |
| sizeof(ZSTDMT_CCtxPool) + (nbThreads-1)*sizeof(ZSTD_CCtx*), cMem); |
| if (!cctxPool) return NULL; |
| if (ZSTD_pthread_mutex_init(&cctxPool->poolMutex, NULL)) { |
| ZSTD_free(cctxPool, cMem); |
| return NULL; |
| } |
| cctxPool->cMem = cMem; |
| cctxPool->totalCCtx = nbThreads; |
| cctxPool->availCCtx = 1; /* at least one cctx for single-thread mode */ |
| cctxPool->cctx[0] = ZSTD_createCCtx_advanced(cMem); |
| if (!cctxPool->cctx[0]) { ZSTDMT_freeCCtxPool(cctxPool); return NULL; } |
| DEBUGLOG(3, "cctxPool created, with %u threads", nbThreads); |
| return cctxPool; |
| } |
| |
| /* only works during initialization phase, not during compression */ |
| static size_t ZSTDMT_sizeof_CCtxPool(ZSTDMT_CCtxPool* cctxPool) |
| { |
| ZSTD_pthread_mutex_lock(&cctxPool->poolMutex); |
| { unsigned const nbThreads = cctxPool->totalCCtx; |
| size_t const poolSize = sizeof(*cctxPool) |
| + (nbThreads-1)*sizeof(ZSTD_CCtx*); |
| unsigned u; |
| size_t totalCCtxSize = 0; |
| for (u=0; u<nbThreads; u++) { |
| totalCCtxSize += ZSTD_sizeof_CCtx(cctxPool->cctx[u]); |
| } |
| ZSTD_pthread_mutex_unlock(&cctxPool->poolMutex); |
| return poolSize + totalCCtxSize; |
| } |
| } |
| |
| static ZSTD_CCtx* ZSTDMT_getCCtx(ZSTDMT_CCtxPool* cctxPool) |
| { |
| DEBUGLOG(5, "ZSTDMT_getCCtx"); |
| ZSTD_pthread_mutex_lock(&cctxPool->poolMutex); |
| if (cctxPool->availCCtx) { |
| cctxPool->availCCtx--; |
| { ZSTD_CCtx* const cctx = cctxPool->cctx[cctxPool->availCCtx]; |
| ZSTD_pthread_mutex_unlock(&cctxPool->poolMutex); |
| return cctx; |
| } } |
| ZSTD_pthread_mutex_unlock(&cctxPool->poolMutex); |
| DEBUGLOG(5, "create one more CCtx"); |
| return ZSTD_createCCtx_advanced(cctxPool->cMem); /* note : can be NULL, when creation fails ! */ |
| } |
| |
| static void ZSTDMT_releaseCCtx(ZSTDMT_CCtxPool* pool, ZSTD_CCtx* cctx) |
| { |
| if (cctx==NULL) return; /* compatibility with release on NULL */ |
| ZSTD_pthread_mutex_lock(&pool->poolMutex); |
| if (pool->availCCtx < pool->totalCCtx) |
| pool->cctx[pool->availCCtx++] = cctx; |
| else { |
| /* pool overflow : should not happen, since totalCCtx==nbThreads */ |
| DEBUGLOG(5, "CCtx pool overflow : free cctx"); |
| ZSTD_freeCCtx(cctx); |
| } |
| ZSTD_pthread_mutex_unlock(&pool->poolMutex); |
| } |
| |
| |
| /* ------------------------------------------ */ |
| /* ===== Worker thread ===== */ |
| /* ------------------------------------------ */ |
| |
| typedef struct { |
| size_t consumed; /* SHARED - set0 by mtctx, then modified by worker AND read by mtctx */ |
| size_t cSize; /* SHARED - set0 by mtctx, then modified by worker AND read by mtctx, then set0 by mtctx */ |
| ZSTD_pthread_mutex_t* mtctx_mutex; /* Thread-safe - used by mtctx and (all) workers */ |
| ZSTD_pthread_cond_t* mtctx_cond; /* Thread-safe - used by mtctx and (all) workers */ |
| ZSTDMT_CCtxPool* cctxPool; /* Thread-safe - used by mtctx and (all) workers */ |
| ZSTDMT_bufferPool* bufPool; /* Thread-safe - used by mtctx and (all) workers */ |
| buffer_t dstBuff; /* set by worker (or mtctx), then read by worker & mtctx, then modified by mtctx => no barrier */ |
| buffer_t srcBuff; /* set by mtctx, then released by worker => no barrier */ |
| const void* prefixStart; /* set by mtctx, then read and set0 by worker => no barrier */ |
| size_t prefixSize; /* set by mtctx, then read by worker => no barrier */ |
| size_t srcSize; /* set by mtctx, then read by worker & mtctx => no barrier */ |
| unsigned firstChunk; /* set by mtctx, then read by worker => no barrier */ |
| unsigned lastChunk; /* set by mtctx, then read by worker => no barrier */ |
| ZSTD_CCtx_params params; /* set by mtctx, then read by worker => no barrier */ |
| const ZSTD_CDict* cdict; /* set by mtctx, then read by worker => no barrier */ |
| unsigned long long fullFrameSize; /* set by mtctx, then read by worker => no barrier */ |
| size_t dstFlushed; /* used only by mtctx */ |
| unsigned frameChecksumNeeded; /* used only by mtctx */ |
| } ZSTDMT_jobDescription; |
| |
| /* ZSTDMT_compressChunk() is a POOL_function type */ |
| void ZSTDMT_compressChunk(void* jobDescription) |
| { |
| ZSTDMT_jobDescription* const job = (ZSTDMT_jobDescription*)jobDescription; |
| ZSTD_CCtx* const cctx = ZSTDMT_getCCtx(job->cctxPool); |
| const void* const src = (const char*)job->prefixStart + job->prefixSize; |
| buffer_t dstBuff = job->dstBuff; |
| |
| /* ressources */ |
| if (cctx==NULL) { |
| job->cSize = ERROR(memory_allocation); |
| goto _endJob; |
| } |
| if (dstBuff.start == NULL) { /* streaming job : doesn't provide a dstBuffer */ |
| dstBuff = ZSTDMT_getBuffer(job->bufPool); |
| if (dstBuff.start==NULL) { |
| job->cSize = ERROR(memory_allocation); |
| goto _endJob; |
| } |
| job->dstBuff = dstBuff; /* this value can be read in ZSTDMT_flush, when it copies the whole job */ |
| } |
| |
| /* init */ |
| if (job->cdict) { |
| size_t const initError = ZSTD_compressBegin_advanced_internal(cctx, NULL, 0, ZSTD_dm_auto, job->cdict, job->params, job->fullFrameSize); |
| assert(job->firstChunk); /* only allowed for first job */ |
| if (ZSTD_isError(initError)) { job->cSize = initError; goto _endJob; } |
| } else { /* srcStart points at reloaded section */ |
| U64 const pledgedSrcSize = job->firstChunk ? job->fullFrameSize : job->srcSize; |
| ZSTD_CCtx_params jobParams = job->params; /* do not modify job->params ! copy it, modify the copy */ |
| { size_t const forceWindowError = ZSTD_CCtxParam_setParameter(&jobParams, ZSTD_p_forceMaxWindow, !job->firstChunk); |
| if (ZSTD_isError(forceWindowError)) { |
| job->cSize = forceWindowError; |
| goto _endJob; |
| } } |
| { size_t const initError = ZSTD_compressBegin_advanced_internal(cctx, |
| job->prefixStart, job->prefixSize, ZSTD_dm_rawContent, /* load dictionary in "content-only" mode (no header analysis) */ |
| NULL, /*cdict*/ |
| jobParams, pledgedSrcSize); |
| if (ZSTD_isError(initError)) { |
| job->cSize = initError; |
| goto _endJob; |
| } } } |
| if (!job->firstChunk) { /* flush and overwrite frame header when it's not first job */ |
| size_t const hSize = ZSTD_compressContinue(cctx, dstBuff.start, dstBuff.capacity, src, 0); |
| if (ZSTD_isError(hSize)) { job->cSize = hSize; /* save error code */ goto _endJob; } |
| DEBUGLOG(5, "ZSTDMT_compressChunk: flush and overwrite %u bytes of frame header (not first chunk)", (U32)hSize); |
| ZSTD_invalidateRepCodes(cctx); |
| } |
| |
| /* compress */ |
| if (sizeof(size_t) > sizeof(int)) |
| assert(job->srcSize < ((size_t)INT_MAX) * ZSTD_BLOCKSIZE_MAX); /* check overflow */ |
| |
| { int const nbBlocks = (int)((job->srcSize + (ZSTD_BLOCKSIZE_MAX-1)) / ZSTD_BLOCKSIZE_MAX); |
| const BYTE* ip = (const BYTE*) src; |
| BYTE* const ostart = (BYTE*)dstBuff.start; |
| BYTE* op = ostart; |
| BYTE* oend = op + dstBuff.capacity; |
| int blockNb; |
| DEBUGLOG(5, "ZSTDMT_compressChunk: compress %u bytes in %i blocks", (U32)job->srcSize, nbBlocks); |
| assert(job->cSize == 0); |
| for (blockNb = 1; blockNb < nbBlocks; blockNb++) { |
| size_t const cSize = ZSTD_compressContinue(cctx, op, oend-op, ip, ZSTD_BLOCKSIZE_MAX); |
| if (ZSTD_isError(cSize)) { job->cSize = cSize; goto _endJob; } |
| ip += ZSTD_BLOCKSIZE_MAX; |
| op += cSize; assert(op < oend); |
| /* stats */ |
| ZSTD_PTHREAD_MUTEX_LOCK(job->mtctx_mutex); /* note : it's a mtctx mutex */ |
| job->cSize += cSize; |
| job->consumed = ZSTD_BLOCKSIZE_MAX * blockNb; |
| DEBUGLOG(5, "ZSTDMT_compressChunk: compress new block : cSize==%u bytes (total: %u)", |
| (U32)cSize, (U32)job->cSize); |
| ZSTD_pthread_cond_signal(job->mtctx_cond); /* warns some more data is ready to be flushed */ |
| ZSTD_pthread_mutex_unlock(job->mtctx_mutex); |
| } |
| /* last block */ |
| if ((nbBlocks > 0) | job->lastChunk /*must output a "last block" flag*/ ) { |
| size_t const lastBlockSize1 = job->srcSize & (ZSTD_BLOCKSIZE_MAX-1); |
| size_t const lastBlockSize = ((lastBlockSize1==0) & (job->srcSize>=ZSTD_BLOCKSIZE_MAX)) ? ZSTD_BLOCKSIZE_MAX : lastBlockSize1; |
| size_t const cSize = (job->lastChunk) ? |
| ZSTD_compressEnd (cctx, op, oend-op, ip, lastBlockSize) : |
| ZSTD_compressContinue(cctx, op, oend-op, ip, lastBlockSize); |
| if (ZSTD_isError(cSize)) { job->cSize = cSize; goto _endJob; } |
| /* stats */ |
| ZSTD_PTHREAD_MUTEX_LOCK(job->mtctx_mutex); |
| job->cSize += cSize; |
| ZSTD_pthread_mutex_unlock(job->mtctx_mutex); |
| } } |
| |
| _endJob: |
| /* release resources */ |
| ZSTDMT_releaseCCtx(job->cctxPool, cctx); |
| ZSTDMT_releaseBuffer(job->bufPool, job->srcBuff); |
| job->srcBuff = g_nullBuffer; job->prefixStart = NULL; |
| /* report */ |
| ZSTD_PTHREAD_MUTEX_LOCK(job->mtctx_mutex); |
| job->consumed = job->srcSize; |
| ZSTD_pthread_cond_signal(job->mtctx_cond); |
| ZSTD_pthread_mutex_unlock(job->mtctx_mutex); |
| } |
| |
| |
| /* ------------------------------------------ */ |
| /* ===== Multi-threaded compression ===== */ |
| /* ------------------------------------------ */ |
| |
| typedef struct { |
| buffer_t buffer; |
| size_t targetCapacity; /* note : buffers provided by the pool may be larger than target capacity */ |
| size_t prefixSize; |
| size_t filled; |
| } inBuff_t; |
| |
| struct ZSTDMT_CCtx_s { |
| POOL_ctx* factory; |
| ZSTDMT_jobDescription* jobs; |
| ZSTDMT_bufferPool* bufPool; |
| ZSTDMT_CCtxPool* cctxPool; |
| ZSTD_pthread_mutex_t mtctx_mutex; |
| ZSTD_pthread_cond_t mtctx_cond; |
| ZSTD_CCtx_params params; |
| size_t targetSectionSize; |
| size_t targetPrefixSize; |
| inBuff_t inBuff; |
| int jobReady; /* 1 => one job is already prepared, but pool has shortage of workers. Don't create another one. */ |
| XXH64_state_t xxhState; |
| unsigned singleBlockingThread; |
| unsigned jobIDMask; |
| unsigned doneJobID; |
| unsigned nextJobID; |
| unsigned frameEnded; |
| unsigned allJobsCompleted; |
| unsigned long long frameContentSize; |
| unsigned long long consumed; |
| unsigned long long produced; |
| ZSTD_customMem cMem; |
| ZSTD_CDict* cdictLocal; |
| const ZSTD_CDict* cdict; |
| }; |
| |
| /* Sets parameters relevant to the compression job, initializing others to |
| * default values. Notably, nbThreads should probably be zero. */ |
| static ZSTD_CCtx_params ZSTDMT_initJobCCtxParams(ZSTD_CCtx_params const params) |
| { |
| ZSTD_CCtx_params jobParams; |
| memset(&jobParams, 0, sizeof(jobParams)); |
| |
| jobParams.cParams = params.cParams; |
| jobParams.fParams = params.fParams; |
| jobParams.compressionLevel = params.compressionLevel; |
| |
| jobParams.ldmParams = params.ldmParams; |
| return jobParams; |
| } |
| |
| static ZSTDMT_jobDescription* ZSTDMT_allocJobsTable(U32* nbJobsPtr, ZSTD_customMem cMem) |
| { |
| U32 const nbJobsLog2 = ZSTD_highbit32(*nbJobsPtr) + 1; |
| U32 const nbJobs = 1 << nbJobsLog2; |
| *nbJobsPtr = nbJobs; |
| return (ZSTDMT_jobDescription*) ZSTD_calloc( |
| nbJobs * sizeof(ZSTDMT_jobDescription), cMem); |
| } |
| |
| /* ZSTDMT_CCtxParam_setNbThreads(): |
| * Internal use only */ |
| size_t ZSTDMT_CCtxParam_setNbThreads(ZSTD_CCtx_params* params, unsigned nbThreads) |
| { |
| if (nbThreads > ZSTDMT_NBTHREADS_MAX) nbThreads = ZSTDMT_NBTHREADS_MAX; |
| if (nbThreads < 1) nbThreads = 1; |
| params->nbThreads = nbThreads; |
| params->overlapSizeLog = ZSTDMT_OVERLAPLOG_DEFAULT; |
| params->jobSize = 0; |
| return nbThreads; |
| } |
| |
| ZSTDMT_CCtx* ZSTDMT_createCCtx_advanced(unsigned nbThreads, ZSTD_customMem cMem) |
| { |
| ZSTDMT_CCtx* mtctx; |
| U32 nbJobs = nbThreads + 2; |
| DEBUGLOG(3, "ZSTDMT_createCCtx_advanced (nbThreads = %u)", nbThreads); |
| |
| if (nbThreads < 1) return NULL; |
| nbThreads = MIN(nbThreads , ZSTDMT_NBTHREADS_MAX); |
| if ((cMem.customAlloc!=NULL) ^ (cMem.customFree!=NULL)) |
| /* invalid custom allocator */ |
| return NULL; |
| |
| mtctx = (ZSTDMT_CCtx*) ZSTD_calloc(sizeof(ZSTDMT_CCtx), cMem); |
| if (!mtctx) return NULL; |
| ZSTDMT_CCtxParam_setNbThreads(&mtctx->params, nbThreads); |
| mtctx->cMem = cMem; |
| mtctx->allJobsCompleted = 1; |
| mtctx->factory = POOL_create_advanced(nbThreads, 0, cMem); |
| mtctx->jobs = ZSTDMT_allocJobsTable(&nbJobs, cMem); |
| mtctx->jobIDMask = nbJobs - 1; |
| mtctx->bufPool = ZSTDMT_createBufferPool(nbThreads, cMem); |
| mtctx->cctxPool = ZSTDMT_createCCtxPool(nbThreads, cMem); |
| if (!mtctx->factory | !mtctx->jobs | !mtctx->bufPool | !mtctx->cctxPool) { |
| ZSTDMT_freeCCtx(mtctx); |
| return NULL; |
| } |
| if (ZSTD_pthread_mutex_init(&mtctx->mtctx_mutex, NULL)) { |
| ZSTDMT_freeCCtx(mtctx); |
| return NULL; |
| } |
| if (ZSTD_pthread_cond_init(&mtctx->mtctx_cond, NULL)) { |
| ZSTDMT_freeCCtx(mtctx); |
| return NULL; |
| } |
| DEBUGLOG(3, "mt_cctx created, for %u threads", nbThreads); |
| return mtctx; |
| } |
| |
| ZSTDMT_CCtx* ZSTDMT_createCCtx(unsigned nbThreads) |
| { |
| return ZSTDMT_createCCtx_advanced(nbThreads, ZSTD_defaultCMem); |
| } |
| |
| |
| /* ZSTDMT_releaseAllJobResources() : |
| * note : ensure all workers are killed first ! */ |
| static void ZSTDMT_releaseAllJobResources(ZSTDMT_CCtx* mtctx) |
| { |
| unsigned jobID; |
| DEBUGLOG(3, "ZSTDMT_releaseAllJobResources"); |
| for (jobID=0; jobID <= mtctx->jobIDMask; jobID++) { |
| DEBUGLOG(4, "job%02u: release dst address %08X", jobID, (U32)(size_t)mtctx->jobs[jobID].dstBuff.start); |
| ZSTDMT_releaseBuffer(mtctx->bufPool, mtctx->jobs[jobID].dstBuff); |
| mtctx->jobs[jobID].dstBuff = g_nullBuffer; |
| mtctx->jobs[jobID].cSize = 0; |
| DEBUGLOG(4, "job%02u: release src address %08X", jobID, (U32)(size_t)mtctx->jobs[jobID].srcBuff.start); |
| ZSTDMT_releaseBuffer(mtctx->bufPool, mtctx->jobs[jobID].srcBuff); |
| mtctx->jobs[jobID].srcBuff = g_nullBuffer; |
| } |
| memset(mtctx->jobs, 0, (mtctx->jobIDMask+1)*sizeof(ZSTDMT_jobDescription)); |
| DEBUGLOG(4, "input: release address %08X", (U32)(size_t)mtctx->inBuff.buffer.start); |
| ZSTDMT_releaseBuffer(mtctx->bufPool, mtctx->inBuff.buffer); |
| mtctx->inBuff.buffer = g_nullBuffer; |
| mtctx->allJobsCompleted = 1; |
| } |
| |
| static void ZSTDMT_waitForAllJobsCompleted(ZSTDMT_CCtx* mtctx) |
| { |
| DEBUGLOG(4, "ZSTDMT_waitForAllJobsCompleted"); |
| while (mtctx->doneJobID < mtctx->nextJobID) { |
| unsigned const jobID = mtctx->doneJobID & mtctx->jobIDMask; |
| ZSTD_PTHREAD_MUTEX_LOCK(&mtctx->mtctx_mutex); |
| while (mtctx->jobs[jobID].consumed < mtctx->jobs[jobID].srcSize) { |
| DEBUGLOG(5, "waiting for jobCompleted signal from chunk %u", mtctx->doneJobID); /* we want to block when waiting for data to flush */ |
| ZSTD_pthread_cond_wait(&mtctx->mtctx_cond, &mtctx->mtctx_mutex); |
| } |
| ZSTD_pthread_mutex_unlock(&mtctx->mtctx_mutex); |
| mtctx->doneJobID++; |
| } |
| } |
| |
| size_t ZSTDMT_freeCCtx(ZSTDMT_CCtx* mtctx) |
| { |
| if (mtctx==NULL) return 0; /* compatible with free on NULL */ |
| POOL_free(mtctx->factory); /* stop and free worker threads */ |
| ZSTDMT_releaseAllJobResources(mtctx); /* release job resources into pools first */ |
| ZSTD_free(mtctx->jobs, mtctx->cMem); |
| ZSTDMT_freeBufferPool(mtctx->bufPool); |
| ZSTDMT_freeCCtxPool(mtctx->cctxPool); |
| ZSTD_freeCDict(mtctx->cdictLocal); |
| ZSTD_pthread_mutex_destroy(&mtctx->mtctx_mutex); |
| ZSTD_pthread_cond_destroy(&mtctx->mtctx_cond); |
| ZSTD_free(mtctx, mtctx->cMem); |
| return 0; |
| } |
| |
| size_t ZSTDMT_sizeof_CCtx(ZSTDMT_CCtx* mtctx) |
| { |
| if (mtctx == NULL) return 0; /* supports sizeof NULL */ |
| return sizeof(*mtctx) |
| + POOL_sizeof(mtctx->factory) |
| + ZSTDMT_sizeof_bufferPool(mtctx->bufPool) |
| + (mtctx->jobIDMask+1) * sizeof(ZSTDMT_jobDescription) |
| + ZSTDMT_sizeof_CCtxPool(mtctx->cctxPool) |
| + ZSTD_sizeof_CDict(mtctx->cdictLocal); |
| } |
| |
| /* Internal only */ |
| size_t ZSTDMT_CCtxParam_setMTCtxParameter(ZSTD_CCtx_params* params, |
| ZSTDMT_parameter parameter, unsigned value) { |
| DEBUGLOG(4, "ZSTDMT_CCtxParam_setMTCtxParameter"); |
| switch(parameter) |
| { |
| case ZSTDMT_p_jobSize : |
| DEBUGLOG(4, "ZSTDMT_CCtxParam_setMTCtxParameter : set jobSize to %u", value); |
| if ( (value > 0) /* value==0 => automatic job size */ |
| & (value < ZSTDMT_JOBSIZE_MIN) ) |
| value = ZSTDMT_JOBSIZE_MIN; |
| params->jobSize = value; |
| return value; |
| case ZSTDMT_p_overlapSectionLog : |
| if (value > 9) value = 9; |
| DEBUGLOG(4, "ZSTDMT_p_overlapSectionLog : %u", value); |
| params->overlapSizeLog = (value >= 9) ? 9 : value; |
| return value; |
| default : |
| return ERROR(parameter_unsupported); |
| } |
| } |
| |
| size_t ZSTDMT_setMTCtxParameter(ZSTDMT_CCtx* mtctx, ZSTDMT_parameter parameter, unsigned value) |
| { |
| DEBUGLOG(4, "ZSTDMT_setMTCtxParameter"); |
| switch(parameter) |
| { |
| case ZSTDMT_p_jobSize : |
| return ZSTDMT_CCtxParam_setMTCtxParameter(&mtctx->params, parameter, value); |
| case ZSTDMT_p_overlapSectionLog : |
| return ZSTDMT_CCtxParam_setMTCtxParameter(&mtctx->params, parameter, value); |
| default : |
| return ERROR(parameter_unsupported); |
| } |
| } |
| |
| /* ZSTDMT_getNbThreads(): |
| * @return nb threads currently active in mtctx. |
| * mtctx must be valid */ |
| unsigned ZSTDMT_getNbThreads(const ZSTDMT_CCtx* mtctx) |
| { |
| assert(mtctx != NULL); |
| return mtctx->params.nbThreads; |
| } |
| |
| /* ZSTDMT_getFrameProgression(): |
| * tells how much data has been consumed (input) and produced (output) for current frame. |
| * able to count progression inside worker threads. |
| * Note : mutex will be acquired during statistics collection. */ |
| ZSTD_frameProgression ZSTDMT_getFrameProgression(ZSTDMT_CCtx* mtctx) |
| { |
| ZSTD_frameProgression fps; |
| DEBUGLOG(6, "ZSTDMT_getFrameProgression"); |
| ZSTD_PTHREAD_MUTEX_LOCK(&mtctx->mtctx_mutex); |
| fps.consumed = mtctx->consumed; |
| fps.produced = mtctx->produced; |
| assert(mtctx->inBuff.filled >= mtctx->inBuff.prefixSize); |
| fps.ingested = mtctx->consumed + (mtctx->inBuff.filled - mtctx->inBuff.prefixSize); |
| { unsigned jobNb; |
| unsigned lastJobNb = mtctx->nextJobID + mtctx->jobReady; assert(mtctx->jobReady <= 1); |
| DEBUGLOG(6, "ZSTDMT_getFrameProgression: jobs: from %u to <%u (jobReady:%u)", |
| mtctx->doneJobID, lastJobNb, mtctx->jobReady) |
| for (jobNb = mtctx->doneJobID ; jobNb < lastJobNb ; jobNb++) { |
| unsigned const wJobID = jobNb & mtctx->jobIDMask; |
| size_t const cResult = mtctx->jobs[wJobID].cSize; |
| size_t const produced = ZSTD_isError(cResult) ? 0 : cResult; |
| fps.consumed += mtctx->jobs[wJobID].consumed; |
| fps.ingested += mtctx->jobs[wJobID].srcSize; |
| fps.produced += produced; |
| } |
| } |
| ZSTD_pthread_mutex_unlock(&mtctx->mtctx_mutex); |
| return fps; |
| } |
| |
| |
| /* ------------------------------------------ */ |
| /* ===== Multi-threaded compression ===== */ |
| /* ------------------------------------------ */ |
| |
| static unsigned ZSTDMT_computeNbChunks(size_t srcSize, unsigned windowLog, unsigned nbThreads) { |
| assert(nbThreads>0); |
| { size_t const chunkSizeTarget = (size_t)1 << (windowLog + 2); |
| size_t const chunkMaxSize = chunkSizeTarget << 2; |
| size_t const passSizeMax = chunkMaxSize * nbThreads; |
| unsigned const multiplier = (unsigned)(srcSize / passSizeMax) + 1; |
| unsigned const nbChunksLarge = multiplier * nbThreads; |
| unsigned const nbChunksMax = (unsigned)(srcSize / chunkSizeTarget) + 1; |
| unsigned const nbChunksSmall = MIN(nbChunksMax, nbThreads); |
| return (multiplier>1) ? nbChunksLarge : nbChunksSmall; |
| } } |
| |
| /* ZSTDMT_compress_advanced_internal() : |
| * This is a blocking function : it will only give back control to caller after finishing its compression job. |
| */ |
| static size_t ZSTDMT_compress_advanced_internal( |
| ZSTDMT_CCtx* mtctx, |
| void* dst, size_t dstCapacity, |
| const void* src, size_t srcSize, |
| const ZSTD_CDict* cdict, |
| ZSTD_CCtx_params const params) |
| { |
| ZSTD_CCtx_params const jobParams = ZSTDMT_initJobCCtxParams(params); |
| unsigned const overlapRLog = (params.overlapSizeLog>9) ? 0 : 9-params.overlapSizeLog; |
| size_t const overlapSize = (overlapRLog>=9) ? 0 : (size_t)1 << (params.cParams.windowLog - overlapRLog); |
| unsigned nbChunks = ZSTDMT_computeNbChunks(srcSize, params.cParams.windowLog, params.nbThreads); |
| size_t const proposedChunkSize = (srcSize + (nbChunks-1)) / nbChunks; |
| size_t const avgChunkSize = (((proposedChunkSize-1) & 0x1FFFF) < 0x7FFF) ? proposedChunkSize + 0xFFFF : proposedChunkSize; /* avoid too small last block */ |
| const char* const srcStart = (const char*)src; |
| size_t remainingSrcSize = srcSize; |
| unsigned const compressWithinDst = (dstCapacity >= ZSTD_compressBound(srcSize)) ? nbChunks : (unsigned)(dstCapacity / ZSTD_compressBound(avgChunkSize)); /* presumes avgChunkSize >= 256 KB, which should be the case */ |
| size_t frameStartPos = 0, dstBufferPos = 0; |
| XXH64_state_t xxh64; |
| assert(jobParams.nbThreads == 0); |
| assert(mtctx->cctxPool->totalCCtx == params.nbThreads); |
| |
| DEBUGLOG(4, "ZSTDMT_compress_advanced_internal: nbChunks=%2u (rawSize=%u bytes; fixedSize=%u) ", |
| nbChunks, (U32)proposedChunkSize, (U32)avgChunkSize); |
| |
| if ((nbChunks==1) | (params.nbThreads<=1)) { /* fallback to single-thread mode : this is a blocking invocation anyway */ |
| ZSTD_CCtx* const cctx = mtctx->cctxPool->cctx[0]; |
| if (cdict) return ZSTD_compress_usingCDict_advanced(cctx, dst, dstCapacity, src, srcSize, cdict, jobParams.fParams); |
| return ZSTD_compress_advanced_internal(cctx, dst, dstCapacity, src, srcSize, NULL, 0, jobParams); |
| } |
| |
| assert(avgChunkSize >= 256 KB); /* condition for ZSTD_compressBound(A) + ZSTD_compressBound(B) <= ZSTD_compressBound(A+B), required to compress directly into Dst (no additional buffer) */ |
| ZSTDMT_setBufferSize(mtctx->bufPool, ZSTD_compressBound(avgChunkSize) ); |
| XXH64_reset(&xxh64, 0); |
| |
| if (nbChunks > mtctx->jobIDMask+1) { /* enlarge job table */ |
| U32 nbJobs = nbChunks; |
| ZSTD_free(mtctx->jobs, mtctx->cMem); |
| mtctx->jobIDMask = 0; |
| mtctx->jobs = ZSTDMT_allocJobsTable(&nbJobs, mtctx->cMem); |
| if (mtctx->jobs==NULL) return ERROR(memory_allocation); |
| assert((nbJobs != 0) && ((nbJobs & (nbJobs - 1)) == 0)); /* ensure nbJobs is a power of 2 */ |
| mtctx->jobIDMask = nbJobs - 1; |
| } |
| |
| { unsigned u; |
| for (u=0; u<nbChunks; u++) { |
| size_t const chunkSize = MIN(remainingSrcSize, avgChunkSize); |
| size_t const dstBufferCapacity = ZSTD_compressBound(chunkSize); |
| buffer_t const dstAsBuffer = { (char*)dst + dstBufferPos, dstBufferCapacity }; |
| buffer_t const dstBuffer = u < compressWithinDst ? dstAsBuffer : g_nullBuffer; |
| size_t dictSize = u ? overlapSize : 0; |
| |
| mtctx->jobs[u].srcBuff = g_nullBuffer; |
| mtctx->jobs[u].prefixStart = srcStart + frameStartPos - dictSize; |
| mtctx->jobs[u].prefixSize = dictSize; |
| mtctx->jobs[u].srcSize = chunkSize; assert(chunkSize > 0); /* avoid job.srcSize == 0 */ |
| mtctx->jobs[u].consumed = 0; |
| mtctx->jobs[u].cSize = 0; |
| mtctx->jobs[u].cdict = (u==0) ? cdict : NULL; |
| mtctx->jobs[u].fullFrameSize = srcSize; |
| mtctx->jobs[u].params = jobParams; |
| /* do not calculate checksum within sections, but write it in header for first section */ |
| if (u!=0) mtctx->jobs[u].params.fParams.checksumFlag = 0; |
| mtctx->jobs[u].dstBuff = dstBuffer; |
| mtctx->jobs[u].cctxPool = mtctx->cctxPool; |
| mtctx->jobs[u].bufPool = mtctx->bufPool; |
| mtctx->jobs[u].firstChunk = (u==0); |
| mtctx->jobs[u].lastChunk = (u==nbChunks-1); |
| mtctx->jobs[u].mtctx_mutex = &mtctx->mtctx_mutex; |
| mtctx->jobs[u].mtctx_cond = &mtctx->mtctx_cond; |
| |
| if (params.fParams.checksumFlag) { |
| XXH64_update(&xxh64, srcStart + frameStartPos, chunkSize); |
| } |
| |
| DEBUGLOG(5, "ZSTDMT_compress_advanced_internal: posting job %u (%u bytes)", u, (U32)chunkSize); |
| DEBUG_PRINTHEX(6, mtctx->jobs[u].prefixStart, 12); |
| POOL_add(mtctx->factory, ZSTDMT_compressChunk, &mtctx->jobs[u]); |
| |
| frameStartPos += chunkSize; |
| dstBufferPos += dstBufferCapacity; |
| remainingSrcSize -= chunkSize; |
| } } |
| |
| /* collect result */ |
| { size_t error = 0, dstPos = 0; |
| unsigned chunkID; |
| for (chunkID=0; chunkID<nbChunks; chunkID++) { |
| DEBUGLOG(5, "waiting for chunk %u ", chunkID); |
| ZSTD_PTHREAD_MUTEX_LOCK(&mtctx->mtctx_mutex); |
| while (mtctx->jobs[chunkID].consumed < mtctx->jobs[chunkID].srcSize) { |
| DEBUGLOG(5, "waiting for jobCompleted signal from chunk %u", chunkID); |
| ZSTD_pthread_cond_wait(&mtctx->mtctx_cond, &mtctx->mtctx_mutex); |
| } |
| ZSTD_pthread_mutex_unlock(&mtctx->mtctx_mutex); |
| DEBUGLOG(5, "ready to write chunk %u ", chunkID); |
| |
| mtctx->jobs[chunkID].prefixStart = NULL; |
| { size_t const cSize = mtctx->jobs[chunkID].cSize; |
| if (ZSTD_isError(cSize)) error = cSize; |
| if ((!error) && (dstPos + cSize > dstCapacity)) error = ERROR(dstSize_tooSmall); |
| if (chunkID) { /* note : chunk 0 is written directly at dst, which is correct position */ |
| if (!error) |
| memmove((char*)dst + dstPos, mtctx->jobs[chunkID].dstBuff.start, cSize); /* may overlap when chunk compressed within dst */ |
| if (chunkID >= compressWithinDst) { /* chunk compressed into its own buffer, which must be released */ |
| DEBUGLOG(5, "releasing buffer %u>=%u", chunkID, compressWithinDst); |
| ZSTDMT_releaseBuffer(mtctx->bufPool, mtctx->jobs[chunkID].dstBuff); |
| } } |
| mtctx->jobs[chunkID].dstBuff = g_nullBuffer; |
| mtctx->jobs[chunkID].cSize = 0; |
| dstPos += cSize ; |
| } |
| } /* for (chunkID=0; chunkID<nbChunks; chunkID++) */ |
| |
| DEBUGLOG(4, "checksumFlag : %u ", params.fParams.checksumFlag); |
| if (params.fParams.checksumFlag) { |
| U32 const checksum = (U32)XXH64_digest(&xxh64); |
| if (dstPos + 4 > dstCapacity) { |
| error = ERROR(dstSize_tooSmall); |
| } else { |
| DEBUGLOG(4, "writing checksum : %08X \n", checksum); |
| MEM_writeLE32((char*)dst + dstPos, checksum); |
| dstPos += 4; |
| } } |
| |
| if (!error) DEBUGLOG(4, "compressed size : %u ", (U32)dstPos); |
| return error ? error : dstPos; |
| } |
| } |
| |
| size_t ZSTDMT_compress_advanced(ZSTDMT_CCtx* mtctx, |
| void* dst, size_t dstCapacity, |
| const void* src, size_t srcSize, |
| const ZSTD_CDict* cdict, |
| ZSTD_parameters const params, |
| unsigned overlapLog) |
| { |
| ZSTD_CCtx_params cctxParams = mtctx->params; |
| cctxParams.cParams = params.cParams; |
| cctxParams.fParams = params.fParams; |
| cctxParams.overlapSizeLog = overlapLog; |
| return ZSTDMT_compress_advanced_internal(mtctx, |
| dst, dstCapacity, |
| src, srcSize, |
| cdict, cctxParams); |
| } |
| |
| |
| size_t ZSTDMT_compressCCtx(ZSTDMT_CCtx* mtctx, |
| void* dst, size_t dstCapacity, |
| const void* src, size_t srcSize, |
| int compressionLevel) |
| { |
| U32 const overlapLog = (compressionLevel >= ZSTD_maxCLevel()) ? 9 : ZSTDMT_OVERLAPLOG_DEFAULT; |
| ZSTD_parameters params = ZSTD_getParams(compressionLevel, srcSize, 0); |
| params.fParams.contentSizeFlag = 1; |
| return ZSTDMT_compress_advanced(mtctx, dst, dstCapacity, src, srcSize, NULL, params, overlapLog); |
| } |
| |
| |
| /* ====================================== */ |
| /* ======= Streaming API ======= */ |
| /* ====================================== */ |
| |
| size_t ZSTDMT_initCStream_internal( |
| ZSTDMT_CCtx* mtctx, |
| const void* dict, size_t dictSize, ZSTD_dictMode_e dictMode, |
| const ZSTD_CDict* cdict, ZSTD_CCtx_params params, |
| unsigned long long pledgedSrcSize) |
| { |
| DEBUGLOG(4, "ZSTDMT_initCStream_internal (pledgedSrcSize=%u)", (U32)pledgedSrcSize); |
| /* params are supposed to be fully validated at this point */ |
| assert(!ZSTD_isError(ZSTD_checkCParams(params.cParams))); |
| assert(!((dict) && (cdict))); /* either dict or cdict, not both */ |
| assert(mtctx->cctxPool->totalCCtx == params.nbThreads); |
| mtctx->singleBlockingThread = (pledgedSrcSize <= ZSTDMT_JOBSIZE_MIN); /* do not trigger multi-threading when srcSize is too small */ |
| if (params.jobSize == 0) { |
| if (params.cParams.windowLog >= 29) |
| params.jobSize = ZSTDMT_JOBSIZE_MAX; |
| else |
| params.jobSize = 1 << (params.cParams.windowLog + 2); |
| } |
| if (params.jobSize > ZSTDMT_JOBSIZE_MAX) params.jobSize = ZSTDMT_JOBSIZE_MAX; |
| |
| if (mtctx->singleBlockingThread) { |
| ZSTD_CCtx_params const singleThreadParams = ZSTDMT_initJobCCtxParams(params); |
| DEBUGLOG(4, "ZSTDMT_initCStream_internal: switch to single blocking thread mode"); |
| assert(singleThreadParams.nbThreads == 0); |
| return ZSTD_initCStream_internal(mtctx->cctxPool->cctx[0], |
| dict, dictSize, cdict, |
| singleThreadParams, pledgedSrcSize); |
| } |
| DEBUGLOG(4, "ZSTDMT_initCStream_internal: %u threads", params.nbThreads); |
| |
| if (mtctx->allJobsCompleted == 0) { /* previous compression not correctly finished */ |
| ZSTDMT_waitForAllJobsCompleted(mtctx); |
| ZSTDMT_releaseAllJobResources(mtctx); |
| mtctx->allJobsCompleted = 1; |
| } |
| |
| mtctx->params = params; |
| mtctx->frameContentSize = pledgedSrcSize; |
| if (dict) { |
| ZSTD_freeCDict(mtctx->cdictLocal); |
| mtctx->cdictLocal = ZSTD_createCDict_advanced(dict, dictSize, |
| ZSTD_dlm_byCopy, dictMode, /* note : a loadPrefix becomes an internal CDict */ |
| params.cParams, mtctx->cMem); |
| mtctx->cdict = mtctx->cdictLocal; |
| if (mtctx->cdictLocal == NULL) return ERROR(memory_allocation); |
| } else { |
| ZSTD_freeCDict(mtctx->cdictLocal); |
| mtctx->cdictLocal = NULL; |
| mtctx->cdict = cdict; |
| } |
| |
| assert(params.overlapSizeLog <= 9); |
| mtctx->targetPrefixSize = (params.overlapSizeLog==0) ? 0 : (size_t)1 << (params.cParams.windowLog - (9 - params.overlapSizeLog)); |
| DEBUGLOG(4, "overlapLog=%u => %u KB", params.overlapSizeLog, (U32)(mtctx->targetPrefixSize>>10)); |
| mtctx->targetSectionSize = params.jobSize; |
| if (mtctx->targetSectionSize < ZSTDMT_JOBSIZE_MIN) mtctx->targetSectionSize = ZSTDMT_JOBSIZE_MIN; |
| if (mtctx->targetSectionSize < mtctx->targetPrefixSize) mtctx->targetSectionSize = mtctx->targetPrefixSize; /* job size must be >= overlap size */ |
| DEBUGLOG(4, "Job Size : %u KB (note : set to %u)", (U32)(mtctx->targetSectionSize>>10), params.jobSize); |
| mtctx->inBuff.targetCapacity = mtctx->targetPrefixSize + mtctx->targetSectionSize; |
| DEBUGLOG(4, "inBuff Size : %u KB", (U32)(mtctx->inBuff.targetCapacity>>10)); |
| ZSTDMT_setBufferSize(mtctx->bufPool, MAX(mtctx->inBuff.targetCapacity, ZSTD_compressBound(mtctx->targetSectionSize)) ); |
| mtctx->inBuff.buffer = g_nullBuffer; |
| mtctx->inBuff.prefixSize = 0; |
| mtctx->doneJobID = 0; |
| mtctx->nextJobID = 0; |
| mtctx->frameEnded = 0; |
| mtctx->allJobsCompleted = 0; |
| mtctx->consumed = 0; |
| mtctx->produced = 0; |
| if (params.fParams.checksumFlag) XXH64_reset(&mtctx->xxhState, 0); |
| return 0; |
| } |
| |
| size_t ZSTDMT_initCStream_advanced(ZSTDMT_CCtx* mtctx, |
| const void* dict, size_t dictSize, |
| ZSTD_parameters params, |
| unsigned long long pledgedSrcSize) |
| { |
| ZSTD_CCtx_params cctxParams = mtctx->params; /* retrieve sticky params */ |
| DEBUGLOG(4, "ZSTDMT_initCStream_advanced (pledgedSrcSize=%u)", (U32)pledgedSrcSize); |
| cctxParams.cParams = params.cParams; |
| cctxParams.fParams = params.fParams; |
| return ZSTDMT_initCStream_internal(mtctx, dict, dictSize, ZSTD_dm_auto, NULL, |
| cctxParams, pledgedSrcSize); |
| } |
| |
| size_t ZSTDMT_initCStream_usingCDict(ZSTDMT_CCtx* mtctx, |
| const ZSTD_CDict* cdict, |
| ZSTD_frameParameters fParams, |
| unsigned long long pledgedSrcSize) |
| { |
| ZSTD_CCtx_params cctxParams = mtctx->params; |
| if (cdict==NULL) return ERROR(dictionary_wrong); /* method incompatible with NULL cdict */ |
| cctxParams.cParams = ZSTD_getCParamsFromCDict(cdict); |
| cctxParams.fParams = fParams; |
| return ZSTDMT_initCStream_internal(mtctx, NULL, 0 /*dictSize*/, ZSTD_dm_auto, cdict, |
| cctxParams, pledgedSrcSize); |
| } |
| |
| |
| /* ZSTDMT_resetCStream() : |
| * pledgedSrcSize can be zero == unknown (for the time being) |
| * prefer using ZSTD_CONTENTSIZE_UNKNOWN, |
| * as `0` might mean "empty" in the future */ |
| size_t ZSTDMT_resetCStream(ZSTDMT_CCtx* mtctx, unsigned long long pledgedSrcSize) |
| { |
| if (!pledgedSrcSize) pledgedSrcSize = ZSTD_CONTENTSIZE_UNKNOWN; |
| if (mtctx->params.nbThreads==1) |
| return ZSTD_resetCStream(mtctx->cctxPool->cctx[0], pledgedSrcSize); |
| return ZSTDMT_initCStream_internal(mtctx, NULL, 0, ZSTD_dm_auto, 0, mtctx->params, |
| pledgedSrcSize); |
| } |
| |
| size_t ZSTDMT_initCStream(ZSTDMT_CCtx* mtctx, int compressionLevel) { |
| ZSTD_parameters const params = ZSTD_getParams(compressionLevel, ZSTD_CONTENTSIZE_UNKNOWN, 0); |
| ZSTD_CCtx_params cctxParams = mtctx->params; /* retrieve sticky params */ |
| DEBUGLOG(4, "ZSTDMT_initCStream (cLevel=%i)", compressionLevel); |
| cctxParams.cParams = params.cParams; |
| cctxParams.fParams = params.fParams; |
| return ZSTDMT_initCStream_internal(mtctx, NULL, 0, ZSTD_dm_auto, NULL, cctxParams, ZSTD_CONTENTSIZE_UNKNOWN); |
| } |
| |
| |
| /* ZSTDMT_writeLastEmptyBlock() |
| * Write a single empty block with an end-of-frame to finish a frame. |
| * Job must be created from streaming variant. |
| * This function is always successfull if expected conditions are fulfilled. |
| */ |
| static void ZSTDMT_writeLastEmptyBlock(ZSTDMT_jobDescription* job) |
| { |
| assert(job->lastChunk == 1); |
| assert(job->srcSize == 0); /* last chunk is empty -> will be simplified into a last empty block */ |
| assert(job->firstChunk == 0); /* cannot be first chunk, as it also needs to create frame header */ |
| /* A job created by streaming variant starts with a src buffer, but no dst buffer. |
| * It summons a dstBuffer itself, compresses into it, then releases srcBuffer, and gives result to mtctx. |
| * When done, srcBuffer is empty, while dstBuffer is filled, and will be released by mtctx. |
| * This shortcut will simply switch srcBuffer for dstBuffer, providing same outcome as a normal job */ |
| assert(job->dstBuff.start == NULL); /* invoked from streaming variant only (otherwise, dstBuff might be user's output) */ |
| assert(job->srcBuff.start != NULL); /* invoked from streaming variant only (otherwise, srcBuff might be user's input) */ |
| assert(job->srcBuff.capacity >= ZSTD_blockHeaderSize); /* no buffer should ever be that small */ |
| job->dstBuff = job->srcBuff; |
| job->srcBuff = g_nullBuffer; |
| job->cSize = ZSTD_writeLastEmptyBlock(job->dstBuff.start, job->dstBuff.capacity); |
| assert(!ZSTD_isError(job->cSize)); |
| assert(job->consumed == 0); |
| } |
| |
| static size_t ZSTDMT_createCompressionJob(ZSTDMT_CCtx* mtctx, size_t srcSize, ZSTD_EndDirective endOp) |
| { |
| unsigned const jobID = mtctx->nextJobID & mtctx->jobIDMask; |
| int const endFrame = (endOp == ZSTD_e_end); |
| |
| if (mtctx->nextJobID > mtctx->doneJobID + mtctx->jobIDMask) { |
| DEBUGLOG(5, "ZSTDMT_createCompressionJob: will not create new job : table is full"); |
| assert((mtctx->nextJobID & mtctx->jobIDMask) == (mtctx->doneJobID & mtctx->jobIDMask)); |
| return 0; |
| } |
| |
| if (!mtctx->jobReady) { |
| DEBUGLOG(5, "ZSTDMT_createCompressionJob: preparing job %u to compress %u bytes with %u preload ", |
| mtctx->nextJobID, (U32)srcSize, (U32)mtctx->inBuff.prefixSize); |
| assert(mtctx->jobs[jobID].srcBuff.start == NULL); /* no buffer left : supposed already released */ |
| mtctx->jobs[jobID].srcBuff = mtctx->inBuff.buffer; |
| mtctx->jobs[jobID].prefixStart = mtctx->inBuff.buffer.start; |
| mtctx->jobs[jobID].prefixSize = mtctx->inBuff.prefixSize; |
| mtctx->jobs[jobID].srcSize = srcSize; |
| assert(mtctx->inBuff.filled >= srcSize + mtctx->inBuff.prefixSize); |
| mtctx->jobs[jobID].consumed = 0; |
| mtctx->jobs[jobID].cSize = 0; |
| mtctx->jobs[jobID].params = mtctx->params; |
| /* do not calculate checksum within sections, but write it in header for first section */ |
| if (mtctx->nextJobID) mtctx->jobs[jobID].params.fParams.checksumFlag = 0; |
| mtctx->jobs[jobID].cdict = mtctx->nextJobID==0 ? mtctx->cdict : NULL; |
| mtctx->jobs[jobID].fullFrameSize = mtctx->frameContentSize; |
| mtctx->jobs[jobID].dstBuff = g_nullBuffer; |
| mtctx->jobs[jobID].cctxPool = mtctx->cctxPool; |
| mtctx->jobs[jobID].bufPool = mtctx->bufPool; |
| mtctx->jobs[jobID].firstChunk = (mtctx->nextJobID==0); |
| mtctx->jobs[jobID].lastChunk = endFrame; |
| mtctx->jobs[jobID].frameChecksumNeeded = endFrame && (mtctx->nextJobID>0) && mtctx->params.fParams.checksumFlag; |
| mtctx->jobs[jobID].dstFlushed = 0; |
| mtctx->jobs[jobID].mtctx_mutex = &mtctx->mtctx_mutex; |
| mtctx->jobs[jobID].mtctx_cond = &mtctx->mtctx_cond; |
| |
| if (mtctx->params.fParams.checksumFlag) |
| XXH64_update(&mtctx->xxhState, (const char*)mtctx->inBuff.buffer.start + mtctx->inBuff.prefixSize, srcSize); |
| |
| /* get a new buffer for next input */ |
| if (!endFrame) { |
| size_t const newPrefixSize = MIN(mtctx->inBuff.filled, mtctx->targetPrefixSize); |
| mtctx->inBuff.buffer = ZSTDMT_getBuffer(mtctx->bufPool); |
| if (mtctx->inBuff.buffer.start == NULL) { /* not enough memory to allocate a new input buffer */ |
| mtctx->jobs[jobID].srcSize = mtctx->jobs[jobID].consumed = 0; |
| mtctx->nextJobID++; |
| ZSTDMT_waitForAllJobsCompleted(mtctx); |
| ZSTDMT_releaseAllJobResources(mtctx); |
| return ERROR(memory_allocation); |
| } |
| mtctx->inBuff.filled -= (mtctx->inBuff.prefixSize + srcSize) - newPrefixSize; |
| memmove(mtctx->inBuff.buffer.start, /* copy end of current job into next job, as "prefix" */ |
| (const char*)mtctx->jobs[jobID].prefixStart + mtctx->inBuff.prefixSize + srcSize - newPrefixSize, |
| mtctx->inBuff.filled); |
| mtctx->inBuff.prefixSize = newPrefixSize; |
| } else { /* endFrame==1 => no need for another input buffer */ |
| mtctx->inBuff.buffer = g_nullBuffer; |
| mtctx->inBuff.filled = 0; |
| mtctx->inBuff.prefixSize = 0; |
| mtctx->frameEnded = endFrame; |
| if (mtctx->nextJobID == 0) { |
| /* single chunk exception : checksum is already calculated directly within worker thread */ |
| mtctx->params.fParams.checksumFlag = 0; |
| } } |
| |
| if ( (srcSize == 0) |
| && (mtctx->nextJobID>0)/*single chunk must also write frame header*/ ) { |
| DEBUGLOG(5, "ZSTDMT_createCompressionJob: creating a last empty block to end frame"); |
| assert(endOp == ZSTD_e_end); /* only possible case : need to end the frame with an empty last block */ |
| ZSTDMT_writeLastEmptyBlock(mtctx->jobs + jobID); |
| mtctx->nextJobID++; |
| return 0; |
| } |
| } |
| |
| DEBUGLOG(5, "ZSTDMT_createCompressionJob: posting job %u : %u bytes (end:%u, jobNb == %u (mod:%u))", |
| mtctx->nextJobID, |
| (U32)mtctx->jobs[jobID].srcSize, |
| mtctx->jobs[jobID].lastChunk, |
| mtctx->nextJobID, |
| jobID); |
| if (POOL_tryAdd(mtctx->factory, ZSTDMT_compressChunk, &mtctx->jobs[jobID])) { |
| mtctx->nextJobID++; |
| mtctx->jobReady = 0; |
| } else { |
| DEBUGLOG(5, "ZSTDMT_createCompressionJob: no worker available for job %u", mtctx->nextJobID); |
| mtctx->jobReady = 1; |
| } |
| return 0; |
| } |
| |
| |
| /*! ZSTDMT_flushProduced() : |
| * `output` : `pos` will be updated with amount of data flushed . |
| * `blockToFlush` : if >0, the function will block and wait if there is no data available to flush . |
| * @return : amount of data remaining within internal buffer, 0 if no more, 1 if unknown but > 0, or an error code */ |
| static size_t ZSTDMT_flushProduced(ZSTDMT_CCtx* mtctx, ZSTD_outBuffer* output, unsigned blockToFlush, ZSTD_EndDirective end) |
| { |
| unsigned const wJobID = mtctx->doneJobID & mtctx->jobIDMask; |
| DEBUGLOG(5, "ZSTDMT_flushProduced (blocking:%u , job %u <= %u)", |
| blockToFlush, mtctx->doneJobID, mtctx->nextJobID); |
| assert(output->size >= output->pos); |
| |
| ZSTD_PTHREAD_MUTEX_LOCK(&mtctx->mtctx_mutex); |
| if ( blockToFlush |
| && (mtctx->doneJobID < mtctx->nextJobID) ) { |
| assert(mtctx->jobs[wJobID].dstFlushed <= mtctx->jobs[wJobID].cSize); |
| while (mtctx->jobs[wJobID].dstFlushed == mtctx->jobs[wJobID].cSize) { /* nothing to flush */ |
| if (mtctx->jobs[wJobID].consumed == mtctx->jobs[wJobID].srcSize) { |
| DEBUGLOG(5, "job %u is completely consumed (%u == %u) => don't wait for cond, there will be none", |
| mtctx->doneJobID, (U32)mtctx->jobs[wJobID].consumed, (U32)mtctx->jobs[wJobID].srcSize); |
| break; |
| } |
| DEBUGLOG(5, "waiting for something to flush from job %u (currently flushed: %u bytes)", |
| mtctx->doneJobID, (U32)mtctx->jobs[wJobID].dstFlushed); |
| ZSTD_pthread_cond_wait(&mtctx->mtctx_cond, &mtctx->mtctx_mutex); /* block when nothing available to flush but more to come */ |
| } } |
| |
| /* try to flush something */ |
| { size_t cSize = mtctx->jobs[wJobID].cSize; |
| size_t const srcConsumed = mtctx->jobs[wJobID].consumed; |
| ZSTD_pthread_mutex_unlock(&mtctx->mtctx_mutex); |
| if (ZSTD_isError(cSize)) { |
| DEBUGLOG(5, "ZSTDMT_flushProduced: job %u : compression error detected : %s", |
| mtctx->doneJobID, ZSTD_getErrorName(cSize)); |
| ZSTDMT_waitForAllJobsCompleted(mtctx); |
| ZSTDMT_releaseAllJobResources(mtctx); |
| return cSize; |
| } |
| /* add frame checksum if necessary (can only happen once) */ |
| assert(srcConsumed <= mtctx->jobs[wJobID].srcSize); |
| if ( (srcConsumed == mtctx->jobs[wJobID].srcSize) /* job completed -> worker no longer active */ |
| && mtctx->jobs[wJobID].frameChecksumNeeded ) { |
| U32 const checksum = (U32)XXH64_digest(&mtctx->xxhState); |
| DEBUGLOG(4, "ZSTDMT_flushProduced: writing checksum : %08X \n", checksum); |
| MEM_writeLE32((char*)mtctx->jobs[wJobID].dstBuff.start + mtctx->jobs[wJobID].cSize, checksum); |
| cSize += 4; |
| mtctx->jobs[wJobID].cSize += 4; /* can write this shared value, as worker is no longer active */ |
| mtctx->jobs[wJobID].frameChecksumNeeded = 0; |
| } |
| if (cSize > 0) { /* compression is ongoing or completed */ |
| size_t const toWrite = MIN(cSize - mtctx->jobs[wJobID].dstFlushed, output->size - output->pos); |
| DEBUGLOG(5, "ZSTDMT_flushProduced: Flushing %u bytes from job %u (completion:%u/%u, generated:%u)", |
| (U32)toWrite, mtctx->doneJobID, (U32)srcConsumed, (U32)mtctx->jobs[wJobID].srcSize, (U32)cSize); |
| assert(mtctx->doneJobID < mtctx->nextJobID); |
| assert(cSize >= mtctx->jobs[wJobID].dstFlushed); |
| assert(mtctx->jobs[wJobID].dstBuff.start != NULL); |
| memcpy((char*)output->dst + output->pos, (const char*)mtctx->jobs[wJobID].dstBuff.start + mtctx->jobs[wJobID].dstFlushed, toWrite); |
| output->pos += toWrite; |
| mtctx->jobs[wJobID].dstFlushed += toWrite; /* can write : this value is only used by mtctx */ |
| |
| if ( (srcConsumed == mtctx->jobs[wJobID].srcSize) /* job completed */ |
| && (mtctx->jobs[wJobID].dstFlushed == cSize) ) { /* output buffer fully flushed => free this job position */ |
| DEBUGLOG(5, "Job %u completed (%u bytes), moving to next one", |
| mtctx->doneJobID, (U32)mtctx->jobs[wJobID].dstFlushed); |
| assert(mtctx->jobs[wJobID].srcBuff.start == NULL); /* srcBuff supposed already released */ |
| ZSTDMT_releaseBuffer(mtctx->bufPool, mtctx->jobs[wJobID].dstBuff); |
| mtctx->jobs[wJobID].dstBuff = g_nullBuffer; |
| mtctx->jobs[wJobID].cSize = 0; /* ensure this job slot is considered "not started" in future check */ |
| mtctx->consumed += mtctx->jobs[wJobID].srcSize; |
| mtctx->produced += cSize; |
| mtctx->doneJobID++; |
| } } |
| |
| /* return value : how many bytes left in buffer ; fake it to 1 when unknown but >0 */ |
| if (cSize > mtctx->jobs[wJobID].dstFlushed) return (cSize - mtctx->jobs[wJobID].dstFlushed); |
| if (mtctx->jobs[wJobID].srcSize > srcConsumed) return 1; /* current job not completely compressed */ |
| } |
| if (mtctx->doneJobID < mtctx->nextJobID) return 1; /* some more jobs ongoing */ |
| if (mtctx->jobReady) return 1; /* one job is ready to push, just not yet in the list */ |
| if (mtctx->inBuff.filled > 0) return 1; /* input is not empty, and still needs to be converted into a job */ |
| mtctx->allJobsCompleted = mtctx->frameEnded; /* all chunks are entirely flushed => if this one is last one, frame is completed */ |
| if (end == ZSTD_e_end) return !mtctx->frameEnded; /* for ZSTD_e_end, question becomes : is frame completed ? instead of : are internal buffers fully flushed ? */ |
| return 0; /* internal buffers fully flushed */ |
| } |
| |
| |
| /** ZSTDMT_compressStream_generic() : |
| * internal use only - exposed to be invoked from zstd_compress.c |
| * assumption : output and input are valid (pos <= size) |
| * @return : minimum amount of data remaining to flush, 0 if none */ |
| size_t ZSTDMT_compressStream_generic(ZSTDMT_CCtx* mtctx, |
| ZSTD_outBuffer* output, |
| ZSTD_inBuffer* input, |
| ZSTD_EndDirective endOp) |
| { |
| size_t const newJobThreshold = mtctx->inBuff.prefixSize + mtctx->targetSectionSize; |
| unsigned forwardInputProgress = 0; |
| DEBUGLOG(5, "ZSTDMT_compressStream_generic (endOp=%u, srcSize=%u)", |
| (U32)endOp, (U32)(input->size - input->pos)); |
| assert(output->pos <= output->size); |
| assert(input->pos <= input->size); |
| |
| if (mtctx->singleBlockingThread) { /* delegate to single-thread (synchronous) */ |
| return ZSTD_compressStream_generic(mtctx->cctxPool->cctx[0], output, input, endOp); |
| } |
| |
| if ((mtctx->frameEnded) && (endOp==ZSTD_e_continue)) { |
| /* current frame being ended. Only flush/end are allowed */ |
| return ERROR(stage_wrong); |
| } |
| |
| /* single-pass shortcut (note : synchronous-mode) */ |
| if ( (mtctx->nextJobID == 0) /* just started */ |
| && (mtctx->inBuff.filled == 0) /* nothing buffered */ |
| && (!mtctx->jobReady) /* no job already created */ |
| && (endOp == ZSTD_e_end) /* end order */ |
| && (output->size - output->pos >= ZSTD_compressBound(input->size - input->pos)) ) { /* enough space in dst */ |
| size_t const cSize = ZSTDMT_compress_advanced_internal(mtctx, |
| (char*)output->dst + output->pos, output->size - output->pos, |
| (const char*)input->src + input->pos, input->size - input->pos, |
| mtctx->cdict, mtctx->params); |
| if (ZSTD_isError(cSize)) return cSize; |
| input->pos = input->size; |
| output->pos += cSize; |
| ZSTDMT_releaseBuffer(mtctx->bufPool, mtctx->inBuff.buffer); /* was allocated in initStream */ |
| mtctx->allJobsCompleted = 1; |
| mtctx->frameEnded = 1; |
| return 0; |
| } |
| |
| /* fill input buffer */ |
| if ( (!mtctx->jobReady) |
| && (input->size > input->pos) ) { /* support NULL input */ |
| if (mtctx->inBuff.buffer.start == NULL) { |
| mtctx->inBuff.buffer = ZSTDMT_getBuffer(mtctx->bufPool); /* note : allocation can fail, in which case, buffer.start==NULL */ |
| mtctx->inBuff.filled = 0; |
| if ( (mtctx->inBuff.buffer.start == NULL) /* allocation failure */ |
| && (mtctx->doneJobID == mtctx->nextJobID) ) { /* and nothing to flush */ |
| return ERROR(memory_allocation); /* no forward progress possible => output an error */ |
| } |
| assert(mtctx->inBuff.buffer.capacity >= mtctx->inBuff.targetCapacity); /* pool must provide a buffer >= targetCapacity */ |
| } |
| if (mtctx->inBuff.buffer.start != NULL) { /* no buffer for input, but it's possible to flush, and then reclaim the buffer */ |
| size_t const toLoad = MIN(input->size - input->pos, mtctx->inBuff.targetCapacity - mtctx->inBuff.filled); |
| DEBUGLOG(5, "ZSTDMT_compressStream_generic: adding %u bytes on top of %u to buffer of size %u", |
| (U32)toLoad, (U32)mtctx->inBuff.filled, (U32)mtctx->inBuff.targetCapacity); |
| memcpy((char*)mtctx->inBuff.buffer.start + mtctx->inBuff.filled, (const char*)input->src + input->pos, toLoad); |
| input->pos += toLoad; |
| mtctx->inBuff.filled += toLoad; |
| forwardInputProgress = toLoad>0; |
| } |
| if ((input->pos < input->size) && (endOp == ZSTD_e_end)) |
| endOp = ZSTD_e_flush; /* can't end now : not all input consumed */ |
| } |
| |
| if ( (mtctx->jobReady) |
| || (mtctx->inBuff.filled >= newJobThreshold) /* filled enough : let's compress */ |
| || ((endOp != ZSTD_e_continue) && (mtctx->inBuff.filled > 0)) /* something to flush : let's go */ |
| || ((endOp == ZSTD_e_end) && (!mtctx->frameEnded)) ) { /* must finish the frame with a zero-size block */ |
| size_t const jobSize = MIN(mtctx->inBuff.filled - mtctx->inBuff.prefixSize, mtctx->targetSectionSize); |
| CHECK_F( ZSTDMT_createCompressionJob(mtctx, jobSize, endOp) ); |
| } |
| |
| /* check for potential compressed data ready to be flushed */ |
| { size_t const remainingToFlush = ZSTDMT_flushProduced(mtctx, output, !forwardInputProgress, endOp); /* block if there was no forward input progress */ |
| if (input->pos < input->size) return MAX(remainingToFlush, 1); /* input not consumed : do not end flush yet */ |
| return remainingToFlush; |
| } |
| } |
| |
| |
| size_t ZSTDMT_compressStream(ZSTDMT_CCtx* mtctx, ZSTD_outBuffer* output, ZSTD_inBuffer* input) |
| { |
| CHECK_F( ZSTDMT_compressStream_generic(mtctx, output, input, ZSTD_e_continue) ); |
| |
| /* recommended next input size : fill current input buffer */ |
| return mtctx->inBuff.targetCapacity - mtctx->inBuff.filled; /* note : could be zero when input buffer is fully filled and no more availability to create new job */ |
| } |
| |
| |
| static size_t ZSTDMT_flushStream_internal(ZSTDMT_CCtx* mtctx, ZSTD_outBuffer* output, ZSTD_EndDirective endFrame) |
| { |
| size_t const srcSize = mtctx->inBuff.filled - mtctx->inBuff.prefixSize; |
| DEBUGLOG(5, "ZSTDMT_flushStream_internal"); |
| |
| if ( mtctx->jobReady /* one job ready for a worker to pick up */ |
| || (srcSize > 0) /* still some data within input buffer */ |
| || ((endFrame==ZSTD_e_end) && !mtctx->frameEnded)) { /* need a last 0-size block to end frame */ |
| DEBUGLOG(5, "ZSTDMT_flushStream_internal : create a new job (%u bytes, end:%u)", |
| (U32)srcSize, (U32)endFrame); |
| CHECK_F( ZSTDMT_createCompressionJob(mtctx, srcSize, endFrame) ); |
| } |
| |
| /* check if there is any data available to flush */ |
| return ZSTDMT_flushProduced(mtctx, output, 1 /* blockToFlush */, endFrame); |
| } |
| |
| |
| size_t ZSTDMT_flushStream(ZSTDMT_CCtx* mtctx, ZSTD_outBuffer* output) |
| { |
| DEBUGLOG(5, "ZSTDMT_flushStream"); |
| if (mtctx->singleBlockingThread) |
| return ZSTD_flushStream(mtctx->cctxPool->cctx[0], output); |
| return ZSTDMT_flushStream_internal(mtctx, output, ZSTD_e_flush); |
| } |
| |
| size_t ZSTDMT_endStream(ZSTDMT_CCtx* mtctx, ZSTD_outBuffer* output) |
| { |
| DEBUGLOG(4, "ZSTDMT_endStream"); |
| if (mtctx->singleBlockingThread) |
| return ZSTD_endStream(mtctx->cctxPool->cctx[0], output); |
| return ZSTDMT_flushStream_internal(mtctx, output, ZSTD_e_end); |
| } |
