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* Copyright (C) ARM Limited 2013-2014. All rights reserved.
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
#ifndef BUFFER_H
#define BUFFER_H
#include <stdint.h>
#include <semaphore.h>
#include "k/perf_event.h"
class Sender;
enum {
class Buffer {
static const size_t MAXSIZE_PACK32 = 5;
static const size_t MAXSIZE_PACK64 = 10;
Buffer(int32_t core, int32_t buftype, const int size, sem_t *const readerSem);
void write(Sender *sender);
int bytesAvailable() const;
int contiguousSpaceAvailable() const;
void commit(const uint64_t time);
void check(const uint64_t time);
// Summary messages
void summary(const uint64_t currTime, const int64_t timestamp, const int64_t uptime, const int64_t monotonicDelta, const char *const uname);
void coreName(const uint64_t currTime, const int core, const int cpuid, const char *const name);
// Block Counter messages
bool eventHeader(uint64_t curr_time);
bool eventTid(int tid);
void event(int key, int32_t value);
void event64(int key, int64_t value);
// Perf Attrs messages
void pea(const uint64_t currTime, const struct perf_event_attr *const pea, int key);
void keys(const uint64_t currTime, const int count, const __u64 *const ids, const int *const keys);
void keysOld(const uint64_t currTime, const int keyCount, const int *const keys, const int bytes, const char *const buf);
void format(const uint64_t currTime, const int length, const char *const format);
void maps(const uint64_t currTime, const int pid, const int tid, const char *const maps);
void comm(const uint64_t currTime, const int pid, const int tid, const char *const image, const char *const comm);
void onlineCPU(const uint64_t currTime, const uint64_t time, const int cpu);
void offlineCPU(const uint64_t currTime, const uint64_t time, const int cpu);
void kallsyms(const uint64_t currTime, const char *const kallsyms);
void setDone();
bool isDone() const;
// Prefer a new member to using these functions if possible
char *getWritePos() { return mBuf + mWritePos; }
void advanceWrite(int bytes) { mWritePos = (mWritePos + bytes) & /*mask*/(mSize - 1); }
static void packInt(char *const buf, const int size, int &writePos, int32_t x);
void packInt(int32_t x);
static void packInt64(char *const buf, const int size, int &writePos, int64_t x);
void packInt64(int64_t x);
void writeBytes(const void *const data, size_t count);
void writeString(const char *const str);
static void writeLEInt(unsigned char *buf, int v) {
buf[0] = (v >> 0) & 0xFF;
buf[1] = (v >> 8) & 0xFF;
buf[2] = (v >> 16) & 0xFF;
buf[3] = (v >> 24) & 0xFF;
void frame();
bool commitReady() const;
bool checkSpace(int bytes);
char *const mBuf;
sem_t *const mReaderSem;
uint64_t mCommitTime;
sem_t mWriterSem;
const int mSize;
int mReadPos;
int mWritePos;
int mCommitPos;
bool mAvailable;
bool mIsDone;
const int32_t mCore;
const int32_t mBufType;
// Intentionally unimplemented
Buffer(const Buffer &);
Buffer &operator=(const Buffer &);
#endif // BUFFER_H