diff options
Diffstat (limited to 'contrib/zstd/zstdmt_compress.c')
| -rw-r--r-- | contrib/zstd/zstdmt_compress.c | 1089 |
1 files changed, 0 insertions, 1089 deletions
diff --git a/contrib/zstd/zstdmt_compress.c b/contrib/zstd/zstdmt_compress.c deleted file mode 100644 index ecb799ab3..000000000 --- a/contrib/zstd/zstdmt_compress.c +++ /dev/null @@ -1,1089 +0,0 @@ -/* - * 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 256 -#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 "pool.h" /* threadpool */ -#include "threading.h" /* mutex */ -#include "zstd_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 PTHREAD_MUTEX_LOCK(mutex) { \ - if (ZSTD_DEBUG>=MUTEX_WAIT_TIME_DLEVEL) { \ - unsigned long long const beforeTime = GetCurrentClockTimeMicroseconds(); \ - 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 pthread_mutex_lock(mutex); \ -} - -#else - -# define PTHREAD_MUTEX_LOCK(m) 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 size; -} buffer_t; - -static const buffer_t g_nullBuffer = { NULL, 0 }; - -typedef struct ZSTDMT_bufferPool_s { - 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 (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; - if (!bufPool) return; /* compatibility with free on NULL */ - for (u=0; u<bufPool->totalBuffers; u++) - ZSTD_free(bufPool->bTable[u].start, bufPool->cMem); - 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; - pthread_mutex_lock(&bufPool->poolMutex); - for (u=0; u<bufPool->totalBuffers; u++) - totalBufferSize += bufPool->bTable[u].size; - pthread_mutex_unlock(&bufPool->poolMutex); - - return poolSize + totalBufferSize; -} - -static void ZSTDMT_setBufferSize(ZSTDMT_bufferPool* bufPool, size_t bSize) -{ - bufPool->bufferSize = bSize; -} - -/** ZSTDMT_getBuffer() : - * assumption : bufPool must be valid */ -static buffer_t ZSTDMT_getBuffer(ZSTDMT_bufferPool* bufPool) -{ - size_t const bSize = bufPool->bufferSize; - DEBUGLOG(5, "ZSTDMT_getBuffer"); - 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.size; - if ((availBufferSize >= bSize) & (availBufferSize <= 10*bSize)) { - /* large enough, but not too much */ - pthread_mutex_unlock(&bufPool->poolMutex); - return buf; - } - /* size conditions not respected : scratch this buffer, create new one */ - DEBUGLOG(5, "existing buffer does not meet size conditions => freeing"); - ZSTD_free(buf.start, bufPool->cMem); - } - pthread_mutex_unlock(&bufPool->poolMutex); - /* create new buffer */ - DEBUGLOG(5, "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.size = (start==NULL) ? 0 : 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"); - pthread_mutex_lock(&bufPool->poolMutex); - if (bufPool->nbBuffers < bufPool->totalBuffers) { - bufPool->bTable[bufPool->nbBuffers++] = buf; /* stored for later use */ - pthread_mutex_unlock(&bufPool->poolMutex); - return; - } - pthread_mutex_unlock(&bufPool->poolMutex); - /* Reached bufferPool capacity (should not happen) */ - DEBUGLOG(5, "buffer pool capacity reached => freeing "); - ZSTD_free(buf.start, bufPool->cMem); -} - -/* Sets parameters relevant to the compression job, initializing others to - * default values. Notably, nbThreads should probably be zero. */ -static ZSTD_CCtx_params ZSTDMT_makeJobCCtxParams(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; -} - -/* ===== CCtx Pool ===== */ -/* a single CCtx Pool can be invoked from multiple threads in parallel */ - -typedef struct { - 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 */ - 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 (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) -{ - 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]); - } - pthread_mutex_unlock(&cctxPool->poolMutex); - return poolSize + totalCCtxSize; - } -} - -static ZSTD_CCtx* ZSTDMT_getCCtx(ZSTDMT_CCtxPool* cctxPool) -{ - DEBUGLOG(5, "ZSTDMT_getCCtx"); - pthread_mutex_lock(&cctxPool->poolMutex); - if (cctxPool->availCCtx) { - cctxPool->availCCtx--; - { ZSTD_CCtx* const cctx = cctxPool->cctx[cctxPool->availCCtx]; - pthread_mutex_unlock(&cctxPool->poolMutex); - return cctx; - } } - 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 */ - 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); - } - pthread_mutex_unlock(&pool->poolMutex); -} - - -/* ===== Thread worker ===== */ - -typedef struct { - buffer_t src; - const void* srcStart; - size_t dictSize; - size_t srcSize; - buffer_t dstBuff; - size_t cSize; - size_t dstFlushed; - unsigned firstChunk; - unsigned lastChunk; - unsigned jobCompleted; - unsigned jobScanned; - pthread_mutex_t* jobCompleted_mutex; - pthread_cond_t* jobCompleted_cond; - ZSTD_CCtx_params params; - const ZSTD_CDict* cdict; - ZSTDMT_CCtxPool* cctxPool; - ZSTDMT_bufferPool* bufPool; - unsigned long long fullFrameSize; -} ZSTDMT_jobDescription; - -/* ZSTDMT_compressChunk() : POOL_function type */ -void ZSTDMT_compressChunk(void* jobDescription) -{ - ZSTDMT_jobDescription* const job = (ZSTDMT_jobDescription*)jobDescription; - ZSTD_CCtx* cctx = ZSTDMT_getCCtx(job->cctxPool); - const void* const src = (const char*)job->srcStart + job->dictSize; - buffer_t dstBuff = job->dstBuff; - DEBUGLOG(5, "job (first:%u) (last:%u) : dictSize %u, srcSize %u", - job->firstChunk, job->lastChunk, (U32)job->dictSize, (U32)job->srcSize); - - if (cctx==NULL) { - job->cSize = ERROR(memory_allocation); - goto _endJob; - } - - if (dstBuff.start == NULL) { - dstBuff = ZSTDMT_getBuffer(job->bufPool); - if (dstBuff.start==NULL) { - job->cSize = ERROR(memory_allocation); - goto _endJob; - } - job->dstBuff = dstBuff; - } - - if (job->cdict) { /* should only happen for first segment */ - size_t const initError = ZSTD_compressBegin_usingCDict_advanced(cctx, job->cdict, job->params.fParams, job->fullFrameSize); - DEBUGLOG(5, "using CDict"); - if (ZSTD_isError(initError)) { job->cSize = initError; goto _endJob; } - } else { /* srcStart points at reloaded section */ - if (!job->firstChunk) job->params.fParams.contentSizeFlag = 0; /* ensure no srcSize control */ - { ZSTD_CCtx_params jobParams = job->params; - size_t const forceWindowError = - ZSTD_CCtxParam_setParameter(&jobParams, ZSTD_p_forceMaxWindow, !job->firstChunk); - /* Force loading dictionary in "content-only" mode (no header analysis) */ - size_t const initError = ZSTD_compressBegin_advanced_internal(cctx, job->srcStart, job->dictSize, ZSTD_dm_rawContent, jobParams, job->fullFrameSize); - if (ZSTD_isError(initError) || ZSTD_isError(forceWindowError)) { - job->cSize = initError; - goto _endJob; - } - } } - if (!job->firstChunk) { /* flush and overwrite frame header when it's not first segment */ - size_t const hSize = ZSTD_compressContinue(cctx, dstBuff.start, dstBuff.size, src, 0); - if (ZSTD_isError(hSize)) { job->cSize = hSize; goto _endJob; } - ZSTD_invalidateRepCodes(cctx); - } - - DEBUGLOG(5, "Compressing : "); - DEBUG_PRINTHEX(4, job->srcStart, 12); - job->cSize = (job->lastChunk) ? - ZSTD_compressEnd (cctx, dstBuff.start, dstBuff.size, src, job->srcSize) : - ZSTD_compressContinue(cctx, dstBuff.start, dstBuff.size, src, job->srcSize); - DEBUGLOG(5, "compressed %u bytes into %u bytes (first:%u) (last:%u)", - (unsigned)job->srcSize, (unsigned)job->cSize, job->firstChunk, job->lastChunk); - DEBUGLOG(5, "dstBuff.size : %u ; => %s", (U32)dstBuff.size, ZSTD_getErrorName(job->cSize)); - -_endJob: - ZSTDMT_releaseCCtx(job->cctxPool, cctx); - ZSTDMT_releaseBuffer(job->bufPool, job->src); - job->src = g_nullBuffer; job->srcStart = NULL; - PTHREAD_MUTEX_LOCK(job->jobCompleted_mutex); - job->jobCompleted = 1; - job->jobScanned = 0; - pthread_cond_signal(job->jobCompleted_cond); - pthread_mutex_unlock(job->jobCompleted_mutex); -} - - -/* ------------------------------------------ */ -/* ===== Multi-threaded compression ===== */ -/* ------------------------------------------ */ - -typedef struct { - buffer_t buffer; - size_t filled; -} inBuff_t; - -struct ZSTDMT_CCtx_s { - POOL_ctx* factory; - ZSTDMT_jobDescription* jobs; - ZSTDMT_bufferPool* bufPool; - ZSTDMT_CCtxPool* cctxPool; - pthread_mutex_t jobCompleted_mutex; - pthread_cond_t jobCompleted_cond; - size_t targetSectionSize; - size_t inBuffSize; - size_t dictSize; - size_t targetDictSize; - inBuff_t inBuff; - ZSTD_CCtx_params params; - XXH64_state_t xxhState; - unsigned jobIDMask; - unsigned doneJobID; - unsigned nextJobID; - unsigned frameEnded; - unsigned allJobsCompleted; - unsigned long long frameContentSize; - ZSTD_customMem cMem; - ZSTD_CDict* cdictLocal; - const ZSTD_CDict* cdict; -}; - -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); -} - -/* Internal only */ -size_t ZSTDMT_initializeCCtxParameters(ZSTD_CCtx_params* params, unsigned nbThreads) -{ - params->nbThreads = nbThreads; - params->overlapSizeLog = ZSTDMT_OVERLAPLOG_DEFAULT; - params->jobSize = 0; - return 0; -} - -ZSTDMT_CCtx* ZSTDMT_createCCtx_advanced(unsigned nbThreads, ZSTD_customMem cMem) -{ - ZSTDMT_CCtx* mtctx; - U32 nbJobs = nbThreads + 2; - DEBUGLOG(3, "ZSTDMT_createCCtx_advanced"); - - 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_initializeCCtxParameters(&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 (pthread_mutex_init(&mtctx->jobCompleted_mutex, NULL)) { - ZSTDMT_freeCCtx(mtctx); - return NULL; - } - if (pthread_cond_init(&mtctx->jobCompleted_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++) { - ZSTDMT_releaseBuffer(mtctx->bufPool, mtctx->jobs[jobID].dstBuff); - mtctx->jobs[jobID].dstBuff = g_nullBuffer; - ZSTDMT_releaseBuffer(mtctx->bufPool, mtctx->jobs[jobID].src); - mtctx->jobs[jobID].src = g_nullBuffer; - } - memset(mtctx->jobs, 0, (mtctx->jobIDMask+1)*sizeof(ZSTDMT_jobDescription)); - ZSTDMT_releaseBuffer(mtctx->bufPool, mtctx->inBuff.buffer); - mtctx->inBuff.buffer = g_nullBuffer; - mtctx->allJobsCompleted = 1; -} - -size_t ZSTDMT_freeCCtx(ZSTDMT_CCtx* mtctx) -{ - if (mtctx==NULL) return 0; /* compatible with free on NULL */ - POOL_free(mtctx->factory); - if (!mtctx->allJobsCompleted) ZSTDMT_releaseAllJobResources(mtctx); /* stop workers first */ - ZSTDMT_freeBufferPool(mtctx->bufPool); /* release job resources into pools first */ - ZSTD_free(mtctx->jobs, mtctx->cMem); - ZSTDMT_freeCCtxPool(mtctx->cctxPool); - ZSTD_freeCDict(mtctx->cdictLocal); - pthread_mutex_destroy(&mtctx->jobCompleted_mutex); - pthread_cond_destroy(&mtctx->jobCompleted_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) { - switch(parameter) - { - case ZSTDMT_p_sectionSize : - params->jobSize = value; - return 0; - case ZSTDMT_p_overlapSectionLog : - DEBUGLOG(4, "ZSTDMT_p_overlapSectionLog : %u", value); - params->overlapSizeLog = (value >= 9) ? 9 : value; - return 0; - default : - return ERROR(parameter_unsupported); - } -} - -size_t ZSTDMT_setMTCtxParameter(ZSTDMT_CCtx* mtctx, ZSTDMT_parameter parameter, unsigned value) -{ - switch(parameter) - { - case ZSTDMT_p_sectionSize : - 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); - } -} - -/* ------------------------------------------ */ -/* ===== Multi-threaded compression ===== */ -/* ------------------------------------------ */ - -static unsigned computeNbChunks(size_t srcSize, unsigned windowLog, unsigned nbThreads) { - 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; -} - -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_makeJobCCtxParams(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 = computeNbChunks(srcSize, params.cParams.windowLog, params.nbThreads); - size_t const proposedChunkSize = (srcSize + (nbChunks-1)) / nbChunks; - size_t const avgChunkSize = ((proposedChunkSize & 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, "nbChunks : %2u (chunkSize : %u bytes) ", nbChunks, (U32)avgChunkSize); - if (nbChunks==1) { /* fallback to single-thread mode */ - 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), which is required for compressWithinDst */ - 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); - 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].src = g_nullBuffer; - mtctx->jobs[u].srcStart = srcStart + frameStartPos - dictSize; - mtctx->jobs[u].dictSize = dictSize; - mtctx->jobs[u].srcSize = chunkSize; - mtctx->jobs[u].cdict = mtctx->nextJobID==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].jobCompleted = 0; - mtctx->jobs[u].jobCompleted_mutex = &mtctx->jobCompleted_mutex; - mtctx->jobs[u].jobCompleted_cond = &mtctx->jobCompleted_cond; - - if (params.fParams.checksumFlag) { - XXH64_update(&xxh64, srcStart + frameStartPos, chunkSize); - } - - DEBUGLOG(5, "posting job %u (%u bytes)", u, (U32)chunkSize); - DEBUG_PRINTHEX(6, mtctx->jobs[u].srcStart, 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); - PTHREAD_MUTEX_LOCK(&mtctx->jobCompleted_mutex); - while (mtctx->jobs[chunkID].jobCompleted==0) { - DEBUGLOG(5, "waiting for jobCompleted signal from chunk %u", chunkID); - pthread_cond_wait(&mtctx->jobCompleted_cond, &mtctx->jobCompleted_mutex); - } - pthread_mutex_unlock(&mtctx->jobCompleted_mutex); - DEBUGLOG(5, "ready to write chunk %u ", chunkID); - - mtctx->jobs[chunkID].srcStart = 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; - } - 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 ======= */ -/* ====================================== */ - -static void ZSTDMT_waitForAllJobsCompleted(ZSTDMT_CCtx* zcs) -{ - DEBUGLOG(4, "ZSTDMT_waitForAllJobsCompleted"); - while (zcs->doneJobID < zcs->nextJobID) { - unsigned const jobID = zcs->doneJobID & zcs->jobIDMask; - PTHREAD_MUTEX_LOCK(&zcs->jobCompleted_mutex); - while (zcs->jobs[jobID].jobCompleted==0) { - DEBUGLOG(5, "waiting for jobCompleted signal from chunk %u", zcs->doneJobID); /* we want to block when waiting for data to flush */ - pthread_cond_wait(&zcs->jobCompleted_cond, &zcs->jobCompleted_mutex); - } - pthread_mutex_unlock(&zcs->jobCompleted_mutex); - zcs->doneJobID++; - } -} - -size_t ZSTDMT_initCStream_internal( - ZSTDMT_CCtx* zcs, - 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"); - /* 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(zcs->cctxPool->totalCCtx == params.nbThreads); - - if (params.nbThreads==1) { - ZSTD_CCtx_params const singleThreadParams = ZSTDMT_makeJobCCtxParams(params); - DEBUGLOG(4, "single thread mode"); - assert(singleThreadParams.nbThreads == 0); - return ZSTD_initCStream_internal(zcs->cctxPool->cctx[0], - dict, dictSize, cdict, - singleThreadParams, pledgedSrcSize); - } - - if (zcs->allJobsCompleted == 0) { /* previous compression not correctly finished */ - ZSTDMT_waitForAllJobsCompleted(zcs); - ZSTDMT_releaseAllJobResources(zcs); - zcs->allJobsCompleted = 1; - } - - zcs->params = params; - zcs->frameContentSize = pledgedSrcSize; - if (dict) { - DEBUGLOG(4,"cdictLocal: %08X", (U32)(size_t)zcs->cdictLocal); - ZSTD_freeCDict(zcs->cdictLocal); - zcs->cdictLocal = ZSTD_createCDict_advanced(dict, dictSize, - ZSTD_dlm_byCopy, dictMode, /* note : a loadPrefix becomes an internal CDict */ - params.cParams, zcs->cMem); - zcs->cdict = zcs->cdictLocal; - if (zcs->cdictLocal == NULL) return ERROR(memory_allocation); - } else { - DEBUGLOG(4,"cdictLocal: %08X", (U32)(size_t)zcs->cdictLocal); - ZSTD_freeCDict(zcs->cdictLocal); - zcs->cdictLocal = NULL; - zcs->cdict = cdict; - } - - zcs->targetDictSize = (params.overlapSizeLog==0) ? 0 : (size_t)1 << (params.cParams.windowLog - (9 - params.overlapSizeLog)); - DEBUGLOG(4, "overlapLog : %u ", params.overlapSizeLog); - DEBUGLOG(4, "overlap Size : %u KB", (U32)(zcs->targetDictSize>>10)); - zcs->targetSectionSize = params.jobSize ? params.jobSize : (size_t)1 << (params.cParams.windowLog + 2); - zcs->targetSectionSize = MAX(ZSTDMT_SECTION_SIZE_MIN, zcs->targetSectionSize); - zcs->targetSectionSize = MAX(zcs->targetDictSize, zcs->targetSectionSize); - DEBUGLOG(4, "Section Size : %u KB", (U32)(zcs->targetSectionSize>>10)); - zcs->inBuffSize = zcs->targetDictSize + zcs->targetSectionSize; - ZSTDMT_setBufferSize(zcs->bufPool, MAX(zcs->inBuffSize, ZSTD_compressBound(zcs->targetSectionSize)) ); - zcs->inBuff.buffer = g_nullBuffer; - zcs->dictSize = 0; - zcs->doneJobID = 0; - zcs->nextJobID = 0; - zcs->frameEnded = 0; - zcs->allJobsCompleted = 0; - if (params.fParams.checksumFlag) XXH64_reset(&zcs->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; - DEBUGLOG(5, "ZSTDMT_initCStream_advanced"); - 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; - cctxParams.cParams = ZSTD_getCParamsFromCDict(cdict); - cctxParams.fParams = fParams; - if (cdict==NULL) return ERROR(dictionary_wrong); /* method incompatible with NULL cdict */ - return ZSTDMT_initCStream_internal(mtctx, NULL, 0 /*dictSize*/, ZSTD_dm_auto, cdict, - cctxParams, pledgedSrcSize); -} - - -/* ZSTDMT_resetCStream() : - * pledgedSrcSize is optional and can be zero == unknown */ -size_t ZSTDMT_resetCStream(ZSTDMT_CCtx* zcs, unsigned long long pledgedSrcSize) -{ - if (zcs->params.nbThreads==1) - return ZSTD_resetCStream(zcs->cctxPool->cctx[0], pledgedSrcSize); - return ZSTDMT_initCStream_internal(zcs, NULL, 0, ZSTD_dm_auto, 0, zcs->params, - pledgedSrcSize); -} - -size_t ZSTDMT_initCStream(ZSTDMT_CCtx* zcs, int compressionLevel) { - ZSTD_parameters const params = ZSTD_getParams(compressionLevel, 0, 0); - ZSTD_CCtx_params cctxParams = zcs->params; - cctxParams.cParams = params.cParams; - cctxParams.fParams = params.fParams; - return ZSTDMT_initCStream_internal(zcs, NULL, 0, ZSTD_dm_auto, NULL, cctxParams, 0); -} - - -static size_t ZSTDMT_createCompressionJob(ZSTDMT_CCtx* zcs, size_t srcSize, unsigned endFrame) -{ - unsigned const jobID = zcs->nextJobID & zcs->jobIDMask; - - DEBUGLOG(4, "preparing job %u to compress %u bytes with %u preload ", - zcs->nextJobID, (U32)srcSize, (U32)zcs->dictSize); - zcs->jobs[jobID].src = zcs->inBuff.buffer; - zcs->jobs[jobID].srcStart = zcs->inBuff.buffer.start; - zcs->jobs[jobID].srcSize = srcSize; - zcs->jobs[jobID].dictSize = zcs->dictSize; - assert(zcs->inBuff.filled >= srcSize + zcs->dictSize); - zcs->jobs[jobID].params = zcs->params; - /* do not calculate checksum within sections, but write it in header for first section */ - if (zcs->nextJobID) zcs->jobs[jobID].params.fParams.checksumFlag = 0; - zcs->jobs[jobID].cdict = zcs->nextJobID==0 ? zcs->cdict : NULL; - zcs->jobs[jobID].fullFrameSize = zcs->frameContentSize; - zcs->jobs[jobID].dstBuff = g_nullBuffer; - zcs->jobs[jobID].cctxPool = zcs->cctxPool; - zcs->jobs[jobID].bufPool = zcs->bufPool; - zcs->jobs[jobID].firstChunk = (zcs->nextJobID==0); - zcs->jobs[jobID].lastChunk = endFrame; - zcs->jobs[jobID].jobCompleted = 0; - zcs->jobs[jobID].dstFlushed = 0; - zcs->jobs[jobID].jobCompleted_mutex = &zcs->jobCompleted_mutex; - zcs->jobs[jobID].jobCompleted_cond = &zcs->jobCompleted_cond; - - if (zcs->params.fParams.checksumFlag) - XXH64_update(&zcs->xxhState, (const char*)zcs->inBuff.buffer.start + zcs->dictSize, srcSize); - - /* get a new buffer for next input */ - if (!endFrame) { - size_t const newDictSize = MIN(srcSize + zcs->dictSize, zcs->targetDictSize); - zcs->inBuff.buffer = ZSTDMT_getBuffer(zcs->bufPool); - if (zcs->inBuff.buffer.start == NULL) { /* not enough memory to allocate next input buffer */ - zcs->jobs[jobID].jobCompleted = 1; - zcs->nextJobID++; - ZSTDMT_waitForAllJobsCompleted(zcs); - ZSTDMT_releaseAllJobResources(zcs); - return ERROR(memory_allocation); - } - zcs->inBuff.filled -= srcSize + zcs->dictSize - newDictSize; - memmove(zcs->inBuff.buffer.start, - (const char*)zcs->jobs[jobID].srcStart + zcs->dictSize + srcSize - newDictSize, - zcs->inBuff.filled); - zcs->dictSize = newDictSize; - } else { /* if (endFrame==1) */ - zcs->inBuff.buffer = g_nullBuffer; - zcs->inBuff.filled = 0; - zcs->dictSize = 0; - zcs->frameEnded = 1; - if (zcs->nextJobID == 0) { - /* single chunk exception : checksum is calculated directly within worker thread */ - zcs->params.fParams.checksumFlag = 0; - } } - - DEBUGLOG(4, "posting job %u : %u bytes (end:%u) (note : doneJob = %u=>%u)", - zcs->nextJobID, - (U32)zcs->jobs[jobID].srcSize, - zcs->jobs[jobID].lastChunk, - zcs->doneJobID, - zcs->doneJobID & zcs->jobIDMask); - POOL_add(zcs->factory, ZSTDMT_compressChunk, &zcs->jobs[jobID]); /* this call is blocking when thread worker pool is exhausted */ - zcs->nextJobID++; - return 0; -} - - -/* ZSTDMT_flushNextJob() : - * output : 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, 1 if unknown but > 0, 0 if no more, or an error code */ -static size_t ZSTDMT_flushNextJob(ZSTDMT_CCtx* zcs, ZSTD_outBuffer* output, unsigned blockToFlush) -{ - unsigned const wJobID = zcs->doneJobID & zcs->jobIDMask; - if (zcs->doneJobID == zcs->nextJobID) return 0; /* all flushed ! */ - PTHREAD_MUTEX_LOCK(&zcs->jobCompleted_mutex); - while (zcs->jobs[wJobID].jobCompleted==0) { - DEBUGLOG(5, "waiting for jobCompleted signal from job %u", zcs->doneJobID); - if (!blockToFlush) { pthread_mutex_unlock(&zcs->jobCompleted_mutex); return 0; } /* nothing ready to be flushed => skip */ - pthread_cond_wait(&zcs->jobCompleted_cond, &zcs->jobCompleted_mutex); /* block when nothing available to flush */ - } - pthread_mutex_unlock(&zcs->jobCompleted_mutex); - /* compression job completed : output can be flushed */ - { ZSTDMT_jobDescription job = zcs->jobs[wJobID]; - if (!job.jobScanned) { - if (ZSTD_isError(job.cSize)) { - DEBUGLOG(5, "compression error detected "); - ZSTDMT_waitForAllJobsCompleted(zcs); - ZSTDMT_releaseAllJobResources(zcs); - return job.cSize; - } - DEBUGLOG(5, "zcs->params.fParams.checksumFlag : %u ", zcs->params.fParams.checksumFlag); - if (zcs->params.fParams.checksumFlag) { - if (zcs->frameEnded && (zcs->doneJobID+1 == zcs->nextJobID)) { /* write checksum at end of last section */ - U32 const checksum = (U32)XXH64_digest(&zcs->xxhState); - DEBUGLOG(5, "writing checksum : %08X \n", checksum); - MEM_writeLE32((char*)job.dstBuff.start + job.cSize, checksum); - job.cSize += 4; - zcs->jobs[wJobID].cSize += 4; - } } - zcs->jobs[wJobID].jobScanned = 1; - } - { size_t const toWrite = MIN(job.cSize - job.dstFlushed, output->size - output->pos); - DEBUGLOG(5, "Flushing %u bytes from job %u ", (U32)toWrite, zcs->doneJobID); - memcpy((char*)output->dst + output->pos, (const char*)job.dstBuff.start + job.dstFlushed, toWrite); - output->pos += toWrite; - job.dstFlushed += toWrite; - } - if (job.dstFlushed == job.cSize) { /* output buffer fully flushed => move to next one */ - ZSTDMT_releaseBuffer(zcs->bufPool, job.dstBuff); - zcs->jobs[wJobID].dstBuff = g_nullBuffer; - zcs->jobs[wJobID].jobCompleted = 0; - zcs->doneJobID++; - } else { - zcs->jobs[wJobID].dstFlushed = job.dstFlushed; - } - /* return value : how many bytes left in buffer ; fake it to 1 if unknown but >0 */ - if (job.cSize > job.dstFlushed) return (job.cSize - job.dstFlushed); - if (zcs->doneJobID < zcs->nextJobID) return 1; /* still some buffer to flush */ - zcs->allJobsCompleted = zcs->frameEnded; /* frame completed and entirely flushed */ - return 0; /* everything flushed */ -} } - - -/** ZSTDMT_compressStream_generic() : - * internal use only - * 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->dictSize + mtctx->targetSectionSize; - assert(output->pos <= output->size); - assert(input->pos <= input->size); - if ((mtctx->frameEnded) && (endOp==ZSTD_e_continue)) { - /* current frame being ended. Only flush/end are allowed. Or start new frame with init */ - return ERROR(stage_wrong); - } - if (mtctx->params.nbThreads==1) { /* delegate to single-thread (synchronous) */ - return ZSTD_compressStream_generic(mtctx->cctxPool->cctx[0], output, input, endOp); - } - - /* single-pass shortcut (note : this is synchronous-mode) */ - if ( (mtctx->nextJobID==0) /* just started */ - && (mtctx->inBuff.filled==0) /* nothing buffered */ - && (endOp==ZSTD_e_end) /* end order */ - && (output->size - output->pos >= ZSTD_compressBound(input->size - input->pos)) ) { /* enough room */ - 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 (input->size > input->pos) { /* support NULL input */ - if (mtctx->inBuff.buffer.start == NULL) { - mtctx->inBuff.buffer = ZSTDMT_getBuffer(mtctx->bufPool); - if (mtctx->inBuff.buffer.start == NULL) return ERROR(memory_allocation); - mtctx->inBuff.filled = 0; - } - { size_t const toLoad = MIN(input->size - input->pos, mtctx->inBuffSize - mtctx->inBuff.filled); - DEBUGLOG(5, "inBuff:%08X; inBuffSize=%u; ToCopy=%u", (U32)(size_t)mtctx->inBuff.buffer.start, (U32)mtctx->inBuffSize, (U32)toLoad); - memcpy((char*)mtctx->inBuff.buffer.start + mtctx->inBuff.filled, (const char*)input->src + input->pos, toLoad); - input->pos += toLoad; - mtctx->inBuff.filled += toLoad; - } } - - if ( (mtctx->inBuff.filled >= newJobThreshold) /* filled enough : let's compress */ - && (mtctx->nextJobID <= mtctx->doneJobID + mtctx->jobIDMask) ) { /* avoid overwriting job round buffer */ - CHECK_F( ZSTDMT_createCompressionJob(mtctx, mtctx->targetSectionSize, 0 /* endFrame */) ); - } - - /* check for potential compressed data ready to be flushed */ - CHECK_F( ZSTDMT_flushNextJob(mtctx, output, (mtctx->inBuff.filled == mtctx->inBuffSize) /* blockToFlush */) ); /* block if it wasn't possible to create new job due to saturation */ - - if (input->pos < input->size) /* input not consumed : do not flush yet */ - endOp = ZSTD_e_continue; - - switch(endOp) - { - case ZSTD_e_flush: - return ZSTDMT_flushStream(mtctx, output); - case ZSTD_e_end: - return ZSTDMT_endStream(mtctx, output); - case ZSTD_e_continue: - return 1; - default: - return ERROR(GENERIC); /* invalid endDirective */ - } -} - - -size_t ZSTDMT_compressStream(ZSTDMT_CCtx* zcs, ZSTD_outBuffer* output, ZSTD_inBuffer* input) -{ - CHECK_F( ZSTDMT_compressStream_generic(zcs, output, input, ZSTD_e_continue) ); - - /* recommended next input size : fill current input buffer */ - return zcs->inBuffSize - zcs->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* zcs, ZSTD_outBuffer* output, unsigned endFrame) -{ - size_t const srcSize = zcs->inBuff.filled - zcs->dictSize; - - if ( ((srcSize > 0) || (endFrame && !zcs->frameEnded)) - && (zcs->nextJobID <= zcs->doneJobID + zcs->jobIDMask) ) { - CHECK_F( ZSTDMT_createCompressionJob(zcs, srcSize, endFrame) ); - } - - /* check if there is any data available to flush */ - return ZSTDMT_flushNextJob(zcs, output, 1 /* blockToFlush */); -} - - -size_t ZSTDMT_flushStream(ZSTDMT_CCtx* zcs, ZSTD_outBuffer* output) -{ - DEBUGLOG(5, "ZSTDMT_flushStream"); - if (zcs->params.nbThreads==1) - return ZSTD_flushStream(zcs->cctxPool->cctx[0], output); - return ZSTDMT_flushStream_internal(zcs, output, 0 /* endFrame */); -} - -size_t ZSTDMT_endStream(ZSTDMT_CCtx* zcs, ZSTD_outBuffer* output) -{ - DEBUGLOG(4, "ZSTDMT_endStream"); - if (zcs->params.nbThreads==1) - return ZSTD_endStream(zcs->cctxPool->cctx[0], output); - return ZSTDMT_flushStream_internal(zcs, output, 1 /* endFrame */); -} |