| /** |
| * \file imports.c |
| * Standard C library function wrappers. |
| * |
| * Imports are services which the device driver or window system or |
| * operating system provides to the core renderer. The core renderer (Mesa) |
| * will call these functions in order to do memory allocation, simple I/O, |
| * etc. |
| * |
| * Some drivers will want to override/replace this file with something |
| * specialized, but that'll be rare. |
| * |
| * Eventually, I want to move roll the glheader.h file into this. |
| * |
| * \todo Functions still needed: |
| * - scanf |
| * - qsort |
| * - rand and RAND_MAX |
| */ |
| |
| /* |
| * Mesa 3-D graphics library |
| * |
| * Copyright (C) 1999-2007 Brian Paul All Rights Reserved. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included |
| * in all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR |
| * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
| * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
| * OTHER DEALINGS IN THE SOFTWARE. |
| */ |
| |
| #include <stdio.h> |
| #include <stdarg.h> |
| #include "c99_math.h" |
| #include "util/rounding.h" /* for _mesa_roundeven */ |
| #include "imports.h" |
| #include "context.h" |
| #include "mtypes.h" |
| #include "version.h" |
| |
| #ifdef _GNU_SOURCE |
| #include <locale.h> |
| #ifdef __APPLE__ |
| #include <xlocale.h> |
| #endif |
| #endif |
| |
| |
| #ifdef _WIN32 |
| #define vsnprintf _vsnprintf |
| #elif defined(__IBMC__) || defined(__IBMCPP__) |
| extern int vsnprintf(char *str, size_t count, const char *fmt, va_list arg); |
| #endif |
| |
| /**********************************************************************/ |
| /** \name Memory */ |
| /*@{*/ |
| |
| /** |
| * Allocate aligned memory. |
| * |
| * \param bytes number of bytes to allocate. |
| * \param alignment alignment (must be greater than zero). |
| * |
| * Allocates extra memory to accommodate rounding up the address for |
| * alignment and to record the real malloc address. |
| * |
| * \sa _mesa_align_free(). |
| */ |
| void * |
| _mesa_align_malloc(size_t bytes, unsigned long alignment) |
| { |
| #if defined(HAVE_POSIX_MEMALIGN) |
| void *mem; |
| int err = posix_memalign(& mem, alignment, bytes); |
| if (err) |
| return NULL; |
| return mem; |
| #elif defined(_WIN32) |
| return _aligned_malloc(bytes, alignment); |
| #else |
| uintptr_t ptr, buf; |
| |
| assert( alignment > 0 ); |
| |
| ptr = (uintptr_t)malloc(bytes + alignment + sizeof(void *)); |
| if (!ptr) |
| return NULL; |
| |
| buf = (ptr + alignment + sizeof(void *)) & ~(uintptr_t)(alignment - 1); |
| *(uintptr_t *)(buf - sizeof(void *)) = ptr; |
| |
| #ifdef DEBUG |
| /* mark the non-aligned area */ |
| while ( ptr < buf - sizeof(void *) ) { |
| *(unsigned long *)ptr = 0xcdcdcdcd; |
| ptr += sizeof(unsigned long); |
| } |
| #endif |
| |
| return (void *) buf; |
| #endif /* defined(HAVE_POSIX_MEMALIGN) */ |
| } |
| |
| /** |
| * Same as _mesa_align_malloc(), but using calloc(1, ) instead of |
| * malloc() |
| */ |
| void * |
| _mesa_align_calloc(size_t bytes, unsigned long alignment) |
| { |
| #if defined(HAVE_POSIX_MEMALIGN) |
| void *mem; |
| |
| mem = _mesa_align_malloc(bytes, alignment); |
| if (mem != NULL) { |
| (void) memset(mem, 0, bytes); |
| } |
| |
| return mem; |
| #elif defined(_WIN32) |
| void *mem; |
| |
| mem = _aligned_malloc(bytes, alignment); |
| if (mem != NULL) { |
| (void) memset(mem, 0, bytes); |
| } |
| |
| return mem; |
| #else |
| uintptr_t ptr, buf; |
| |
| assert( alignment > 0 ); |
| |
| ptr = (uintptr_t)calloc(1, bytes + alignment + sizeof(void *)); |
| if (!ptr) |
| return NULL; |
| |
| buf = (ptr + alignment + sizeof(void *)) & ~(uintptr_t)(alignment - 1); |
| *(uintptr_t *)(buf - sizeof(void *)) = ptr; |
| |
| #ifdef DEBUG |
| /* mark the non-aligned area */ |
| while ( ptr < buf - sizeof(void *) ) { |
| *(unsigned long *)ptr = 0xcdcdcdcd; |
| ptr += sizeof(unsigned long); |
| } |
| #endif |
| |
| return (void *)buf; |
| #endif /* defined(HAVE_POSIX_MEMALIGN) */ |
| } |
| |
| /** |
| * Free memory which was allocated with either _mesa_align_malloc() |
| * or _mesa_align_calloc(). |
| * \param ptr pointer to the memory to be freed. |
| * The actual address to free is stored in the word immediately before the |
| * address the client sees. |
| * Note that it is legal to pass NULL pointer to this function and will be |
| * handled accordingly. |
| */ |
| void |
| _mesa_align_free(void *ptr) |
| { |
| #if defined(HAVE_POSIX_MEMALIGN) |
| free(ptr); |
| #elif defined(_WIN32) |
| _aligned_free(ptr); |
| #else |
| if (ptr) { |
| void **cubbyHole = (void **) ((char *) ptr - sizeof(void *)); |
| void *realAddr = *cubbyHole; |
| free(realAddr); |
| } |
| #endif /* defined(HAVE_POSIX_MEMALIGN) */ |
| } |
| |
| /** |
| * Reallocate memory, with alignment. |
| */ |
| void * |
| _mesa_align_realloc(void *oldBuffer, size_t oldSize, size_t newSize, |
| unsigned long alignment) |
| { |
| #if defined(_WIN32) |
| (void) oldSize; |
| return _aligned_realloc(oldBuffer, newSize, alignment); |
| #else |
| const size_t copySize = (oldSize < newSize) ? oldSize : newSize; |
| void *newBuf = _mesa_align_malloc(newSize, alignment); |
| if (newBuf && oldBuffer && copySize > 0) { |
| memcpy(newBuf, oldBuffer, copySize); |
| } |
| |
| _mesa_align_free(oldBuffer); |
| return newBuf; |
| #endif |
| } |
| |
| /*@}*/ |
| |
| |
| /**********************************************************************/ |
| /** \name Math */ |
| /*@{*/ |
| |
| |
| #ifndef HAVE___BUILTIN_POPCOUNT |
| /** |
| * Return number of bits set in given GLuint. |
| */ |
| unsigned int |
| _mesa_bitcount(unsigned int n) |
| { |
| unsigned int bits; |
| for (bits = 0; n > 0; n = n >> 1) { |
| bits += (n & 1); |
| } |
| return bits; |
| } |
| #endif |
| |
| #ifndef HAVE___BUILTIN_POPCOUNTLL |
| /** |
| * Return number of bits set in given 64-bit uint. |
| */ |
| unsigned int |
| _mesa_bitcount_64(uint64_t n) |
| { |
| unsigned int bits; |
| for (bits = 0; n > 0; n = n >> 1) { |
| bits += (n & 1); |
| } |
| return bits; |
| } |
| #endif |
| |
| /*@}*/ |
| |
| |
| /** Needed due to #ifdef's, above. */ |
| int |
| _mesa_vsnprintf(char *str, size_t size, const char *fmt, va_list args) |
| { |
| return vsnprintf( str, size, fmt, args); |
| } |
| |
| /** Wrapper around vsnprintf() */ |
| int |
| _mesa_snprintf( char *str, size_t size, const char *fmt, ... ) |
| { |
| int r; |
| va_list args; |
| va_start( args, fmt ); |
| r = vsnprintf( str, size, fmt, args ); |
| va_end( args ); |
| return r; |
| } |
| |
| |