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new zstdmt version using generic treadpool

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This commit is contained in:
Yann Collet 2016-12-31 06:04:25 +01:00
parent c6a6417458
commit 3b29dbd9e8
2 changed files with 137 additions and 230 deletions
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6
lib/common/pool.c
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@ -46,8 +46,8 @@ struct POOL_ctx_s {
Waits for jobs and executes them. Waits for jobs and executes them.
@returns : NULL on failure else non-null. @returns : NULL on failure else non-null.
*/ */
static void *POOL_thread(void *opaque) { static void* POOL_thread(void* opaque) {
POOL_ctx *ctx = (POOL_ctx *)opaque; POOL_ctx* const ctx = (POOL_ctx*)opaque;
if (!ctx) { return NULL; } if (!ctx) { return NULL; }
for (;;) { for (;;) {
/* Lock the mutex and wait for a non-empty queue or until shutdown */ /* Lock the mutex and wait for a non-empty queue or until shutdown */
@ -61,7 +61,7 @@ static void *POOL_thread(void *opaque) {
return opaque; return opaque;
} }
/* Pop a job off the queue */ /* Pop a job off the queue */
{ POOL_job job = ctx->queue[ctx->queueHead]; { POOL_job const job = ctx->queue[ctx->queueHead];
ctx->queueHead = (ctx->queueHead + 1) % ctx->queueSize; ctx->queueHead = (ctx->queueHead + 1) % ctx->queueSize;
/* Unlock the mutex, signal a pusher, and run the job */ /* Unlock the mutex, signal a pusher, and run the job */
if (pthread_mutex_unlock(&ctx->queueMutex)) { return NULL; } if (pthread_mutex_unlock(&ctx->queueMutex)) { return NULL; }

361
lib/compress/zstdmt_compress.c
View File

@ -1,5 +1,6 @@
#include <stdlib.h> /* malloc */ #include <stdlib.h> /* malloc */
#include <pthread.h> /* posix only, to be replaced by a more portable version */ #include <pool.h> /* threadpool */
#include <pthread.h> /* mutex */
#include "zstd_internal.h" /* MIN, ERROR */ #include "zstd_internal.h" /* MIN, ERROR */
#include "zstdmt_compress.h" #include "zstdmt_compress.h"
@ -43,176 +44,11 @@ if (g_debugLevel>=MUTEX_WAIT_TIME_DLEVEL) { \
#define ZSTDMT_NBTHREADS_MAX 128 #define ZSTDMT_NBTHREADS_MAX 128
#define ZSTDMT_NBSTACKEDFRAMES_MAX (2*ZSTDMT_NBTHREADS_MAX) #define ZSTDMT_NBSTACKEDFRAMES_MAX (2*ZSTDMT_NBTHREADS_MAX)
typedef struct frameToWrite_s {
const void* start;
size_t frameSize;
unsigned frameID;
unsigned isLastFrame;
} frameToWrite_t;
typedef struct ZSTDMT_dstBuffer_s {
ZSTD_outBuffer out;
unsigned frameIDToWrite;
pthread_mutex_t frameTable_mutex;
pthread_mutex_t allFramesWritten_mutex;
frameToWrite_t stackedFrame[ZSTDMT_NBSTACKEDFRAMES_MAX];
unsigned nbStackedFrames;
} ZSTDMT_dstBufferManager;
static ZSTDMT_dstBufferManager ZSTDMT_createDstBufferManager(void* dst, size_t dstCapacity)
{
ZSTDMT_dstBufferManager dbm;
dbm.out.dst = dst;
dbm.out.size = dstCapacity;
dbm.out.pos = 0;
dbm.frameIDToWrite = 0;
pthread_mutex_init(&dbm.frameTable_mutex, NULL);
pthread_mutex_t* const allFramesWritten_mutex = &dbm.allFramesWritten_mutex;
pthread_mutex_init(allFramesWritten_mutex, NULL);
PTHREAD_MUTEX_LOCK(allFramesWritten_mutex); /* maybe could be merged into init ? */
dbm.nbStackedFrames = 0;
return dbm;
}
/* note : can fail if nbStackedFrames > ZSTDMT_NBSTACKEDFRAMES_MAX.
* note2 : can only be called from a section with frameTable_mutex already locked */
static void ZSTDMT_stackFrameToWrite(ZSTDMT_dstBufferManager* dstBufferManager, frameToWrite_t frame) {
dstBufferManager->stackedFrame[dstBufferManager->nbStackedFrames++] = frame;
}
typedef struct buffer_s { typedef struct buffer_s {
void* start; void* start;
size_t bufferSize; size_t size;
} buffer_t; } buffer_t;
static buffer_t ZSTDMT_getDstBuffer(const ZSTDMT_dstBufferManager* dstBufferManager)
{
ZSTD_outBuffer const out = dstBufferManager->out;
buffer_t buf;
buf.start = (char*)(out.dst) + out.pos;
buf.bufferSize = out.size - out.pos;
return buf;
}
/* condition : stackNumber < dstBufferManager->nbStackedFrames.
* note : there can only be one write at a time, due to frameID condition */
static size_t ZSTDMT_writeFrame(ZSTDMT_dstBufferManager* dstBufferManager, unsigned stackNumber)
{
ZSTD_outBuffer const out = dstBufferManager->out;
size_t const frameSize = dstBufferManager->stackedFrame[stackNumber].frameSize;
const void* const frameStart = dstBufferManager->stackedFrame[stackNumber].start;
if (out.pos + frameSize > out.size)
return ERROR(dstSize_tooSmall);
DEBUGLOG(3, "writing frame %u (%u bytes) ", dstBufferManager->stackedFrame[stackNumber].frameID, (U32)frameSize);
memcpy((char*)out.dst + out.pos, frameStart, frameSize);
dstBufferManager->out.pos += frameSize;
dstBufferManager->frameIDToWrite = dstBufferManager->stackedFrame[stackNumber].frameID + 1;
return 0;
}
static size_t ZSTDMT_tryWriteFrame(ZSTDMT_dstBufferManager* dstBufferManager,
const void* src, size_t srcSize,
unsigned frameID, unsigned isLastFrame)
{
unsigned lastFrameWritten = 0;
/* check if correct frame ordering; stack otherwise */
DEBUGLOG(5, "considering writing frame %u ", frameID);
PTHREAD_MUTEX_LOCK(&dstBufferManager->frameTable_mutex);
if (frameID != dstBufferManager->frameIDToWrite) {
DEBUGLOG(4, "writing frameID %u : not possible, waiting for %u ", frameID, dstBufferManager->frameIDToWrite);
frameToWrite_t const frame = { src, srcSize, frameID, isLastFrame };
ZSTDMT_stackFrameToWrite(dstBufferManager, frame);
pthread_mutex_unlock(&dstBufferManager->frameTable_mutex);
return 0;
}
pthread_mutex_unlock(&dstBufferManager->frameTable_mutex);
/* write frame
* note : only one write possible due to frameID condition */
DEBUGLOG(3, "writing frame %u (%u bytes) ", frameID, (U32)srcSize);
ZSTD_outBuffer const out = dstBufferManager->out;
if (out.pos + srcSize > out.size)
return ERROR(dstSize_tooSmall);
if (frameID) /* frameID==0 compress directly in dst buffer */
memcpy((char*)out.dst + out.pos, src, srcSize);
dstBufferManager->out.pos += srcSize;
dstBufferManager->frameIDToWrite = frameID+1;
lastFrameWritten = isLastFrame;
/* check if more frames are stacked */
PTHREAD_MUTEX_LOCK(&dstBufferManager->frameTable_mutex);
unsigned frameWritten = dstBufferManager->nbStackedFrames>0;
while (frameWritten) {
unsigned u;
frameID++;
frameWritten = 0;
for (u=0; u<dstBufferManager->nbStackedFrames; u++) {
if (dstBufferManager->stackedFrame[u].frameID == frameID) {
pthread_mutex_unlock(&dstBufferManager->frameTable_mutex);
DEBUGLOG(4, "catch up frame %u ", frameID);
{ size_t const writeError = ZSTDMT_writeFrame(dstBufferManager, u);
if (ZSTD_isError(writeError)) return writeError; }
lastFrameWritten = dstBufferManager->stackedFrame[u].isLastFrame;
dstBufferManager->frameIDToWrite = frameID+1;
/* remove frame from stack */
PTHREAD_MUTEX_LOCK(&dstBufferManager->frameTable_mutex);
dstBufferManager->stackedFrame[u] = dstBufferManager->stackedFrame[dstBufferManager->nbStackedFrames-1];
dstBufferManager->nbStackedFrames -= 1;
frameWritten = dstBufferManager->nbStackedFrames>0;
break;
} } }
pthread_mutex_unlock(&dstBufferManager->frameTable_mutex);
/* end reached : last frame written */
if (lastFrameWritten) pthread_mutex_unlock(&dstBufferManager->allFramesWritten_mutex);
return 0;
}
typedef struct ZSTDMT_jobDescription_s {
const void* src; /* NULL means : kill thread */
size_t srcSize;
int compressionLevel;
ZSTDMT_dstBufferManager* dstManager;
unsigned frameNumber;
unsigned isLastFrame;
} ZSTDMT_jobDescription;
typedef struct ZSTDMT_jobAgency_s {
pthread_mutex_t jobAnnounce_mutex;
pthread_mutex_t jobApply_mutex;
ZSTDMT_jobDescription jobAnnounce;
} ZSTDMT_jobAgency;
/* ZSTDMT_postjob() :
* This function is blocking as long as previous posted job is not taken.
* It could be made non-blocking, with a storage queue.
* But blocking has benefits : on top of memory savings,
* the caller will be able to measure delay, allowing dynamic speed throttle (via compression level).
*/
static void ZSTDMT_postjob(ZSTDMT_jobAgency* jobAgency, ZSTDMT_jobDescription job)
{
DEBUGLOG(5, "starting job posting ");
PTHREAD_MUTEX_LOCK(&jobAgency->jobApply_mutex); /* wait for a thread to take previous job */
DEBUGLOG(5, "job posting mutex acquired ");
jobAgency->jobAnnounce = job; /* post job */
pthread_mutex_unlock(&jobAgency->jobAnnounce_mutex); /* announce */
DEBUGLOG(5, "job available now ");
}
static ZSTDMT_jobDescription ZSTDMT_getjob(ZSTDMT_jobAgency* jobAgency)
{
PTHREAD_MUTEX_LOCK(&jobAgency->jobAnnounce_mutex); /* should check return code */
ZSTDMT_jobDescription const job = jobAgency->jobAnnounce;
pthread_mutex_unlock(&jobAgency->jobApply_mutex);
return job;
}
#define ZSTDMT_NBBUFFERSPOOLED_MAX ZSTDMT_NBTHREADS_MAX #define ZSTDMT_NBBUFFERSPOOLED_MAX ZSTDMT_NBTHREADS_MAX
typedef struct ZSTDMT_bufferPool_s { typedef struct ZSTDMT_bufferPool_s {
pthread_mutex_t bufferPool_mutex; pthread_mutex_t bufferPool_mutex;
@ -227,7 +63,7 @@ static buffer_t ZSTDMT_getBuffer(ZSTDMT_bufferPool* pool, size_t bSize)
pool->nbBuffers--; pool->nbBuffers--;
buffer_t const buf = pool->bTable[pool->nbBuffers]; buffer_t const buf = pool->bTable[pool->nbBuffers];
pthread_mutex_unlock(&pool->bufferPool_mutex); pthread_mutex_unlock(&pool->bufferPool_mutex);
size_t const availBufferSize = buf.bufferSize; size_t const availBufferSize = buf.size;
if ((availBufferSize >= bSize) & (availBufferSize <= 10*bSize)) /* large enough, but not too much */ if ((availBufferSize >= bSize) & (availBufferSize <= 10*bSize)) /* large enough, but not too much */
return buf; return buf;
free(buf.start); /* size conditions not respected : create a new buffer */ free(buf.start); /* size conditions not respected : create a new buffer */
@ -235,7 +71,7 @@ static buffer_t ZSTDMT_getBuffer(ZSTDMT_bufferPool* pool, size_t bSize)
pthread_mutex_unlock(&pool->bufferPool_mutex); pthread_mutex_unlock(&pool->bufferPool_mutex);
/* create new buffer */ /* create new buffer */
buffer_t buf; buffer_t buf;
buf.bufferSize = bSize; buf.size = bSize;
buf.start = calloc(1, bSize); buf.start = calloc(1, bSize);
return buf; return buf;
} }
@ -255,79 +91,119 @@ static void ZSTDMT_releaseBuffer(ZSTDMT_bufferPool* pool, buffer_t buf)
struct ZSTDMT_CCtx_s { typedef struct {
pthread_t pthread[ZSTDMT_NBTHREADS_MAX]; ZSTD_CCtx* cctx;
unsigned nbThreads; const void* srcStart;
ZSTDMT_jobAgency jobAgency; size_t srcSize;
ZSTDMT_bufferPool bufferPool; buffer_t dstBuff;
}; int compressionLevel;
unsigned frameID;
size_t cSize;
unsigned jobCompleted;
pthread_mutex_t* jobCompleted_mutex;
} ZSTDMT_jobDescription;
static void* ZSTDMT_compressionThread(void* arg) /* ZSTDMT_compressFrame() : POOL_function type */
void ZSTDMT_compressFrame(void* jobDescription)
{ {
if (arg==NULL) return NULL; /* error : should not be possible */ DEBUGLOG(5, "Entering ZSTDMT_compressFrame() ");
ZSTDMT_CCtx* const mtctx = (ZSTDMT_CCtx*) arg; ZSTDMT_jobDescription* const job = (ZSTDMT_jobDescription*)jobDescription;
ZSTDMT_jobAgency* const jobAgency = &mtctx->jobAgency; DEBUGLOG(5, "compressing %u bytes with ZSTD_compressCCtx : ", (unsigned)job->srcSize);
ZSTDMT_bufferPool* const pool = &mtctx->bufferPool; job->cSize = ZSTD_compressCCtx(job->cctx, job->dstBuff.start, job->dstBuff.size, job->srcStart, job->srcSize, job->compressionLevel);
ZSTD_CCtx* const cctx = ZSTD_createCCtx(); DEBUGLOG(5, "compressed to %u bytes ", (unsigned)job->cSize);
if (cctx==NULL) return NULL; /* allocation failure : thread not started */ job->jobCompleted = 1;
DEBUGLOG(3, "thread %li created ", (long int)pthread_self()); DEBUGLOG(5, "unlocking mutex jobCompleted_mutex");
for (;;) { pthread_mutex_unlock(job->jobCompleted_mutex);
ZSTDMT_jobDescription const job = ZSTDMT_getjob(jobAgency); DEBUGLOG(5, "ZSTDMT_compressFrame completed");
if (job.src == NULL) {
DEBUGLOG(4, "thread exit ");
ZSTD_freeCCtx(cctx);
return NULL;
}
ZSTDMT_dstBufferManager* dstBufferManager = job.dstManager;
size_t const dstBufferCapacity = ZSTD_compressBound(job.srcSize);
DEBUGLOG(4, "requesting a dstBuffer for frame %u", job.frameNumber);
buffer_t const dstBuffer = job.frameNumber ? ZSTDMT_getBuffer(pool, dstBufferCapacity) : ZSTDMT_getDstBuffer(dstBufferManager); /* lack params */
DEBUGLOG(4, "start compressing frame %u", job.frameNumber);
//size_t const cSize = ZSTD_compress(dstBuffer.start, dstBuffer.bufferSize, job.src, job.srcSize, job.compressionLevel);
size_t const cSize = ZSTD_compressCCtx(cctx, dstBuffer.start, dstBuffer.bufferSize, job.src, job.srcSize, job.compressionLevel);
if (ZSTD_isError(cSize)) return (void*)(cSize); /* error - find a better way */
size_t const writeError = ZSTDMT_tryWriteFrame(dstBufferManager, dstBuffer.start, cSize, job.frameNumber, job.isLastFrame); /* pas clair */
if (ZSTD_isError(writeError)) return (void*)writeError;
if (job.frameNumber) ZSTDMT_releaseBuffer(pool, dstBuffer);
}
} }
/* note : calls to CCtxPool only from main thread */
typedef struct {
unsigned totalCCtx;
unsigned availCCtx;
ZSTD_CCtx* cctx[1]; /* variable size */
} ZSTDMT_CCtxPool;
static ZSTDMT_CCtxPool* ZSTDMT_createCCtxPool(unsigned nbThreads)
{
ZSTDMT_CCtxPool* const cctxPool = (ZSTDMT_CCtxPool*) calloc(1, sizeof(ZSTDMT_CCtxPool) + nbThreads*sizeof(ZSTD_CCtx*));
if (!cctxPool) return NULL;
{ unsigned u;
for (u=0; u<nbThreads; u++)
cctxPool->cctx[u] = ZSTD_createCCtx(); /* check for NULL result ! */
}
cctxPool->totalCCtx = cctxPool->availCCtx = nbThreads;
return cctxPool;
}
static ZSTD_CCtx* ZSTDMT_getCCtx(ZSTDMT_CCtxPool* pool)
{
if (pool->availCCtx) {
pool->availCCtx--;
return pool->cctx[pool->availCCtx];
}
/* should not be possible, since totalCCtx==nbThreads */
return ZSTD_createCCtx();
}
static void ZSTDMT_releaseCCtx(ZSTDMT_CCtxPool* pool, ZSTD_CCtx* cctx)
{
if (pool->availCCtx < pool->totalCCtx)
pool->cctx[pool->availCCtx++] = cctx;
else
/* should not be possible, since totalCCtx==nbThreads */
ZSTD_freeCCtx(cctx);
}
static void ZSTDMT_freeCCtxPool(ZSTDMT_CCtxPool* pool)
{
unsigned u;
for (u=0; u<pool->totalCCtx; u++)
ZSTD_freeCCtx(pool->cctx[u]);
free(pool);
}
struct ZSTDMT_CCtx_s {
POOL_ctx* factory;
ZSTDMT_bufferPool buffPool;
ZSTDMT_CCtxPool* cctxPool;
unsigned nbThreads;
pthread_mutex_t jobCompleted_mutex;
ZSTDMT_jobDescription jobs[1]; /* variable size */
};
ZSTDMT_CCtx *ZSTDMT_createCCtx(unsigned nbThreads) ZSTDMT_CCtx *ZSTDMT_createCCtx(unsigned nbThreads)
{ {
if ((nbThreads < 1) | (nbThreads > ZSTDMT_NBTHREADS_MAX)) return NULL; if ((nbThreads < 1) | (nbThreads > ZSTDMT_NBTHREADS_MAX)) return NULL;
ZSTDMT_CCtx* const cctx = (ZSTDMT_CCtx*) calloc(1, sizeof(ZSTDMT_CCtx)); ZSTDMT_CCtx* const cctx = (ZSTDMT_CCtx*) calloc(1, sizeof(ZSTDMT_CCtx) + nbThreads*sizeof(ZSTDMT_jobDescription));
if (!cctx) return NULL; if (!cctx) return NULL;
/* init jobAgency */
pthread_mutex_init(&cctx->jobAgency.jobAnnounce_mutex, NULL); /* check return value ? */
pthread_mutex_init(&cctx->jobAgency.jobApply_mutex, NULL);
PTHREAD_MUTEX_LOCK(&cctx->jobAgency.jobAnnounce_mutex); /* no job at beginning */
/* init bufferPool */
pthread_mutex_init(&cctx->bufferPool.bufferPool_mutex, NULL);
/* start all workers */
cctx->nbThreads = nbThreads; cctx->nbThreads = nbThreads;
DEBUGLOG(2, "nbThreads : %u \n", nbThreads); cctx->factory = POOL_create(nbThreads, 1);
unsigned t; pthread_mutex_init(&cctx->buffPool.bufferPool_mutex, NULL);
for (t = 0; t < nbThreads; t++) { cctx->cctxPool = ZSTDMT_createCCtxPool(nbThreads);
pthread_create(&cctx->pthread[t], NULL, ZSTDMT_compressionThread, cctx); /* check return value ? */ pthread_mutex_init(&cctx->jobCompleted_mutex, NULL);
}
return cctx; return cctx;
} }
size_t ZSTDMT_freeCCtx(ZSTDMT_CCtx* cctx) size_t ZSTDMT_freeCCtx(ZSTDMT_CCtx* mtctx) /* incompleted ! */
{ {
/* free threads */ POOL_free(mtctx->factory);
/* free mutex (if necessary) */ /* free mutexes (if necessary) */
/* free bufferPool */ /* free bufferPool */
free(cctx); /* incompleted ! */ ZSTDMT_freeCCtxPool(mtctx->cctxPool);
free(mtctx);
return 0; return 0;
} }
size_t ZSTDMT_compressCCtx(ZSTDMT_CCtx* mtctx, size_t ZSTDMT_compressCCtx(ZSTDMT_CCtx* mtctx,
void* dst, size_t dstCapacity, void* dst, size_t dstCapacity,
const void* src, size_t srcSize, const void* src, size_t srcSize,
int compressionLevel) int compressionLevel)
{ {
ZSTDMT_jobAgency* jobAgency = &mtctx->jobAgency;
ZSTD_parameters const params = ZSTD_getParams(compressionLevel, srcSize, 0); ZSTD_parameters const params = ZSTD_getParams(compressionLevel, srcSize, 0);
size_t const frameSizeTarget = (size_t)1 << (params.cParams.windowLog + 2); size_t const frameSizeTarget = (size_t)1 << (params.cParams.windowLog + 2);
unsigned const nbFramesMax = (unsigned)(srcSize / frameSizeTarget) + (srcSize < frameSizeTarget) /* min 1 */; unsigned const nbFramesMax = (unsigned)(srcSize / frameSizeTarget) + (srcSize < frameSizeTarget) /* min 1 */;
@ -336,7 +212,7 @@ size_t ZSTDMT_compressCCtx(ZSTDMT_CCtx* mtctx,
size_t remainingSrcSize = srcSize; size_t remainingSrcSize = srcSize;
const char* const srcStart = (const char*)src; const char* const srcStart = (const char*)src;
size_t frameStartPos = 0; size_t frameStartPos = 0;
ZSTDMT_dstBufferManager dbm = ZSTDMT_createDstBufferManager(dst, dstCapacity);
DEBUGLOG(2, "windowLog : %u => frameSizeTarget : %u ", params.cParams.windowLog, (U32)frameSizeTarget); DEBUGLOG(2, "windowLog : %u => frameSizeTarget : %u ", params.cParams.windowLog, (U32)frameSizeTarget);
DEBUGLOG(2, "nbFrames : %u (size : %u bytes) ", nbFrames, (U32)avgFrameSize); DEBUGLOG(2, "nbFrames : %u (size : %u bytes) ", nbFrames, (U32)avgFrameSize);
@ -344,15 +220,46 @@ size_t ZSTDMT_compressCCtx(ZSTDMT_CCtx* mtctx,
{ unsigned u; { unsigned u;
for (u=0; u<nbFrames; u++) { for (u=0; u<nbFrames; u++) {
size_t const frameSize = MIN(remainingSrcSize, avgFrameSize); size_t const frameSize = MIN(remainingSrcSize, avgFrameSize);
size_t const dstBufferCapacity = u ? ZSTD_compressBound(frameSize) : dstCapacity;
buffer_t const dstBuffer = u ? ZSTDMT_getBuffer(&mtctx->buffPool, dstBufferCapacity) : (buffer_t){ dst, dstCapacity };
ZSTD_CCtx* cctx = ZSTDMT_getCCtx(mtctx->cctxPool);
mtctx->jobs[u].srcStart = srcStart + frameStartPos;
mtctx->jobs[u].srcSize = frameSize;
mtctx->jobs[u].compressionLevel = compressionLevel;
mtctx->jobs[u].dstBuff = dstBuffer;
mtctx->jobs[u].cctx = cctx;
mtctx->jobs[u].frameID = u;
mtctx->jobs[u].jobCompleted = 0;
mtctx->jobs[u].jobCompleted_mutex = &mtctx->jobCompleted_mutex;
DEBUGLOG(3, "posting job %u (%u bytes)", u, (U32)frameSize); DEBUGLOG(3, "posting job %u (%u bytes)", u, (U32)frameSize);
ZSTDMT_jobDescription const job = { srcStart+frameStartPos, frameSize, compressionLevel, POOL_add(mtctx->factory, ZSTDMT_compressFrame, &mtctx->jobs[u]);
&dbm, u, u==(nbFrames-1) };
ZSTDMT_postjob(jobAgency, job);
frameStartPos += frameSize; frameStartPos += frameSize;
remainingSrcSize -= frameSize; remainingSrcSize -= frameSize;
} } } }
/* note : since nbFrames <= nbThreads, all jobs should be running immediately in parallel */
{ unsigned frameID;
size_t dstPos = 0;
for (frameID=0; frameID<nbFrames; frameID++) {
DEBUGLOG(3, "ready to write frame %u ", frameID);
while (mtctx->jobs[frameID].jobCompleted==0) {
DEBUGLOG(4, "waiting for signal jobCompleted_mutex")
pthread_mutex_lock(&mtctx->jobCompleted_mutex);
}
{ size_t const cSize = mtctx->jobs[frameID].cSize;
if (ZSTD_isError(cSize)) return cSize;
if (dstPos + cSize > dstCapacity) return ERROR(dstSize_tooSmall);
if (frameID) memcpy((char*)dst + dstPos, mtctx->jobs[frameID].dstBuff.start, mtctx->jobs[frameID].cSize);
dstPos += cSize ;
}
ZSTDMT_releaseCCtx(mtctx->cctxPool, mtctx->jobs[frameID].cctx);
ZSTDMT_releaseBuffer(&mtctx->buffPool, mtctx->jobs[frameID].dstBuff);
}
DEBUGLOG(4, "compressed size : %u ", (U32)dstPos);
return dstPos;
}
PTHREAD_MUTEX_LOCK(&dbm.allFramesWritten_mutex);
DEBUGLOG(4, "compressed size : %u ", (U32)dbm.out.pos);
return dbm.out.pos;
} }