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/* MtCoder.c -- Multi-thread Coder
: Igor Pavlov : Public domain */
#include "Precomp.h"
#include "MtCoder.h"
#ifndef Z7_ST
static SRes MtProgressThunk_Progress(ICompressProgressPtr pp, UInt64 inSize, UInt64 outSize)
{
Z7_CONTAINER_FROM_VTBL_TO_DECL_VAR_pp_vt_p(CMtProgressThunk)
UInt64 inSize2 = 0;
UInt64 outSize2 = 0;
if (inSize != (UInt64)(Int64)-1)
{
inSize2 = inSize - p->inSize;
p->inSize = inSize;
}
if (outSize != (UInt64)(Int64)-1)
{
outSize2 = outSize - p->outSize;
p->outSize = outSize;
}
return MtProgress_ProgressAdd(p->mtProgress, inSize2, outSize2);
}
void MtProgressThunk_CreateVTable(CMtProgressThunk *p)
{
p->vt.Progress = MtProgressThunk_Progress;
}
#define RINOK_THREAD(x) { if ((x) != 0) return SZ_ERROR_THREAD; }
static THREAD_FUNC_DECL ThreadFunc(void *pp);
static SRes MtCoderThread_CreateAndStart(CMtCoderThread *t
#ifdef _WIN32
, CMtCoder * const mtc
#endif
)
{
WRes wres = AutoResetEvent_OptCreate_And_Reset(&t->startEvent);
// printf("\n====== MtCoderThread_CreateAndStart : \n");
if (wres == 0)
{
t->stop = False;
if (!Thread_WasCreated(&t->thread))
{
#ifdef _WIN32
if (mtc->numThreadGroups)
wres = Thread_Create_With_Group(&t->thread, ThreadFunc, t,
ThreadNextGroup_GetNext(&mtc->nextGroup), // group
0); // affinityMask
else
#endif
wres = Thread_Create(&t->thread, ThreadFunc, t);
}
if (wres == 0)
wres = Event_Set(&t->startEvent);
}
if (wres == 0)
return SZ_OK;
return MY_SRes_HRESULT_FROM_WRes(wres);
}
Z7_FORCE_INLINE
static void MtCoderThread_Destruct(CMtCoderThread *t)
{
if (Thread_WasCreated(&t->thread))
{
t->stop = 1;
Event_Set(&t->startEvent);
Thread_Wait_Close(&t->thread);
}
Event_Close(&t->startEvent);
if (t->inBuf)
{
ISzAlloc_Free(t->mtCoder->allocBig, t->inBuf);
t->inBuf = NULL;
}
}
/*
ThreadFunc2() returns:
SZ_OK - in all normal cases (even for stream error or memory allocation error)
SZ_ERROR_THREAD - in case of failure in system synch function
*/
static SRes ThreadFunc2(CMtCoderThread *t)
{
CMtCoder * const mtc = t->mtCoder;
for (;;)
{
unsigned bi;
SRes res;
SRes res2;
BoolInt finished;
unsigned bufIndex;
size_t size;
const Byte *inData;
UInt64 readProcessed = 0;
RINOK_THREAD(Event_Wait(&mtc->readEvent))
/* after Event_Wait(&mtc->readEvent) we must call Event_Set(&mtc->readEvent) in any case to unlock another threads */
if (mtc->stopReading)
{
return Event_Set(&mtc->readEvent) == 0 ? SZ_OK : SZ_ERROR_THREAD;
}
res = MtProgress_GetError(&mtc->mtProgress);
size = 0;
inData = NULL;
finished = True;
if (res == SZ_OK)
{
size = mtc->blockSize;
if (mtc->inStream)
{
if (!t->inBuf)
{
t->inBuf = (Byte *)ISzAlloc_Alloc(mtc->allocBig, mtc->blockSize);
if (!t->inBuf)
res = SZ_ERROR_MEM;
}
if (res == SZ_OK)
{
res = SeqInStream_ReadMax(mtc->inStream, t->inBuf, &size);
readProcessed = mtc->readProcessed + size;
mtc->readProcessed = readProcessed;
}
if (res != SZ_OK)
{
mtc->readRes = res;
/* after reading error - we can stop encoding of previous blocks */
MtProgress_SetError(&mtc->mtProgress, res);
}
else
finished = (size != mtc->blockSize);
}
else
{
size_t rem;
readProcessed = mtc->readProcessed;
rem = mtc->inDataSize - (size_t)readProcessed;
if (size > rem)
size = rem;
inData = mtc->inData + (size_t)readProcessed;
readProcessed += size;
mtc->readProcessed = readProcessed;
finished = (mtc->inDataSize == (size_t)readProcessed);
}
}
/* we must get some block from blocksSemaphore before Event_Set(&mtc->readEvent) */
res2 = SZ_OK;
if (Semaphore_Wait(&mtc->blocksSemaphore) != 0)
{
res2 = SZ_ERROR_THREAD;
if (res == SZ_OK)
{
res = res2;
// MtProgress_SetError(&mtc->mtProgress, res);
}
}
bi = mtc->blockIndex;
if (++mtc->blockIndex >= mtc->numBlocksMax)
mtc->blockIndex = 0;
bufIndex = (unsigned)(int)-1;
if (res == SZ_OK)
res = MtProgress_GetError(&mtc->mtProgress);
if (res != SZ_OK)
finished = True;
if (!finished)
{
if (mtc->numStartedThreads < mtc->numStartedThreadsLimit
&& mtc->expectedDataSize != readProcessed)
{
res = MtCoderThread_CreateAndStart(&mtc->threads[mtc->numStartedThreads]
#ifdef _WIN32
, mtc
#endif
);
if (res == SZ_OK)
mtc->numStartedThreads++;
else
{
MtProgress_SetError(&mtc->mtProgress, res);
finished = True;
}
}
}
if (finished)
mtc->stopReading = True;
RINOK_THREAD(Event_Set(&mtc->readEvent))
if (res2 != SZ_OK)
return res2;
if (res == SZ_OK)
{
CriticalSection_Enter(&mtc->cs);
bufIndex = mtc->freeBlockHead;
mtc->freeBlockHead = mtc->freeBlockList[bufIndex];
CriticalSection_Leave(&mtc->cs);
res = mtc->mtCallback->Code(mtc->mtCallbackObject, t->index, bufIndex,
mtc->inStream ? t->inBuf : inData, size, finished);
// MtProgress_Reinit(&mtc->mtProgress, t->index);
if (res != SZ_OK)
MtProgress_SetError(&mtc->mtProgress, res);
}
{
CMtCoderBlock * const block = &mtc->blocks[bi];
block->res = res;
block->bufIndex = bufIndex;
block->finished = finished;
}
#ifdef MTCODER_USE_WRITE_THREAD
RINOK_THREAD(Event_Set(&mtc->writeEvents[bi]))
#else
{
unsigned wi;
{
CriticalSection_Enter(&mtc->cs);
wi = mtc->writeIndex;
if (wi == bi)
mtc->writeIndex = (unsigned)(int)-1;
else
mtc->ReadyBlocks[bi] = True;
CriticalSection_Leave(&mtc->cs);
}
if (wi != bi)
{
if (res != SZ_OK || finished)
return 0;
continue;
}
if (mtc->writeRes != SZ_OK)
res = mtc->writeRes;
for (;;)
{
if (res == SZ_OK && bufIndex != (unsigned)(int)-1)
{
res = mtc->mtCallback->Write(mtc->mtCallbackObject, bufIndex);
if (res != SZ_OK)
{
mtc->writeRes = res;
MtProgress_SetError(&mtc->mtProgress, res);
}
}
if (++wi >= mtc->numBlocksMax)
wi = 0;
{
BoolInt isReady;
CriticalSection_Enter(&mtc->cs);
if (bufIndex != (unsigned)(int)-1)
{
mtc->freeBlockList[bufIndex] = mtc->freeBlockHead;
mtc->freeBlockHead = bufIndex;
}
isReady = mtc->ReadyBlocks[wi];
if (isReady)
mtc->ReadyBlocks[wi] = False;
else
mtc->writeIndex = wi;
CriticalSection_Leave(&mtc->cs);
RINOK_THREAD(Semaphore_Release1(&mtc->blocksSemaphore))
if (!isReady)
break;
}
{
CMtCoderBlock *block = &mtc->blocks[wi];
if (res == SZ_OK && block->res != SZ_OK)
res = block->res;
bufIndex = block->bufIndex;
finished = block->finished;
}
}
}
#endif
if (finished || res != SZ_OK)
return 0;
}
}
static THREAD_FUNC_DECL ThreadFunc(void *pp)
{
CMtCoderThread * const t = (CMtCoderThread *)pp;
for (;;)
{
if (Event_Wait(&t->startEvent) != 0)
return (THREAD_FUNC_RET_TYPE)SZ_ERROR_THREAD;
if (t->stop)
return 0;
{
const SRes res = ThreadFunc2(t);
CMtCoder *mtc = t->mtCoder;
if (res != SZ_OK)
{
MtProgress_SetError(&mtc->mtProgress, res);
}
#ifndef MTCODER_USE_WRITE_THREAD
{
const unsigned numFinished = (unsigned)InterlockedIncrement(&mtc->numFinishedThreads);
if (numFinished == mtc->numStartedThreads)
if (Event_Set(&mtc->finishedEvent) != 0)
return (THREAD_FUNC_RET_TYPE)SZ_ERROR_THREAD;
}
#endif
}
}
}
void MtCoder_Construct(CMtCoder *p)
{
unsigned i;
p->blockSize = 0;
p->numThreadsMax = 0;
p->numThreadGroups = 0;
p->expectedDataSize = (UInt64)(Int64)-1;
p->inStream = NULL;
p->inData = NULL;
p->inDataSize = 0;
p->progress = NULL;
p->allocBig = NULL;
p->mtCallback = NULL;
p->mtCallbackObject = NULL;
p->allocatedBufsSize = 0;
Event_Construct(&p->readEvent);
Semaphore_Construct(&p->blocksSemaphore);
for (i = 0; i < MTCODER_THREADS_MAX; i++)
{
CMtCoderThread *t = &p->threads[i];
t->mtCoder = p;
t->index = i;
t->inBuf = NULL;
t->stop = False;
Event_Construct(&t->startEvent);
Thread_CONSTRUCT(&t->thread)
}
#ifdef MTCODER_USE_WRITE_THREAD
for (i = 0; i < MTCODER_BLOCKS_MAX; i++)
Event_Construct(&p->writeEvents[i]);
#else
Event_Construct(&p->finishedEvent);
#endif
CriticalSection_Init(&p->cs);
CriticalSection_Init(&p->mtProgress.cs);
}
static void MtCoder_Free(CMtCoder *p)
{
unsigned i;
/*
p->stopReading = True;
if (Event_IsCreated(&p->readEvent))
Event_Set(&p->readEvent);
*/
for (i = 0; i < MTCODER_THREADS_MAX; i++)
MtCoderThread_Destruct(&p->threads[i]);
Event_Close(&p->readEvent);
Semaphore_Close(&p->blocksSemaphore);
#ifdef MTCODER_USE_WRITE_THREAD
for (i = 0; i < MTCODER_BLOCKS_MAX; i++)
Event_Close(&p->writeEvents[i]);
#else
Event_Close(&p->finishedEvent);
#endif
}
void MtCoder_Destruct(CMtCoder *p)
{
MtCoder_Free(p);
CriticalSection_Delete(&p->cs);
CriticalSection_Delete(&p->mtProgress.cs);
}
SRes MtCoder_Code(CMtCoder *p)
{
unsigned numThreads = p->numThreadsMax;
unsigned numBlocksMax;
unsigned i;
SRes res = SZ_OK;
// printf("\n====== MtCoder_Code : \n");
if (numThreads > MTCODER_THREADS_MAX)
numThreads = MTCODER_THREADS_MAX;
numBlocksMax = MTCODER_GET_NUM_BLOCKS_FROM_THREADS(numThreads);
if (p->blockSize < ((UInt32)1 << 26)) numBlocksMax++;
if (p->blockSize < ((UInt32)1 << 24)) numBlocksMax++;
if (p->blockSize < ((UInt32)1 << 22)) numBlocksMax++;
if (numBlocksMax > MTCODER_BLOCKS_MAX)
numBlocksMax = MTCODER_BLOCKS_MAX;
if (p->blockSize != p->allocatedBufsSize)
{
for (i = 0; i < MTCODER_THREADS_MAX; i++)
{
CMtCoderThread *t = &p->threads[i];
if (t->inBuf)
{
ISzAlloc_Free(p->allocBig, t->inBuf);
t->inBuf = NULL;
}
}
p->allocatedBufsSize = p->blockSize;
}
p->readRes = SZ_OK;
MtProgress_Init(&p->mtProgress, p->progress);
#ifdef MTCODER_USE_WRITE_THREAD
for (i = 0; i < numBlocksMax; i++)
{
RINOK_THREAD(AutoResetEvent_OptCreate_And_Reset(&p->writeEvents[i]))
}
#else
RINOK_THREAD(AutoResetEvent_OptCreate_And_Reset(&p->finishedEvent))
#endif
{
RINOK_THREAD(AutoResetEvent_OptCreate_And_Reset(&p->readEvent))
RINOK_THREAD(Semaphore_OptCreateInit(&p->blocksSemaphore, (UInt32)numBlocksMax, (UInt32)numBlocksMax))
}
for (i = 0; i < MTCODER_BLOCKS_MAX - 1; i++)
p->freeBlockList[i] = i + 1;
p->freeBlockList[MTCODER_BLOCKS_MAX - 1] = (unsigned)(int)-1;
p->freeBlockHead = 0;
p->readProcessed = 0;
p->blockIndex = 0;
p->numBlocksMax = numBlocksMax;
p->stopReading = False;
#ifndef MTCODER_USE_WRITE_THREAD
p->writeIndex = 0;
p->writeRes = SZ_OK;
for (i = 0; i < MTCODER_BLOCKS_MAX; i++)
p->ReadyBlocks[i] = False;
p->numFinishedThreads = 0;
#endif
p->numStartedThreadsLimit = numThreads;
p->numStartedThreads = 0;
ThreadNextGroup_Init(&p->nextGroup, p->numThreadGroups, 0); // startGroup
// for (i = 0; i < numThreads; i++)
{
// here we create new thread for first block.
// And each new thread will create another new thread after block reading
// until numStartedThreadsLimit is reached.
CMtCoderThread *nextThread = &p->threads[p->numStartedThreads++];
{
const SRes res2 = MtCoderThread_CreateAndStart(nextThread
#ifdef _WIN32
, p
#endif
);
RINOK(res2)
}
}
RINOK_THREAD(Event_Set(&p->readEvent))
#ifdef MTCODER_USE_WRITE_THREAD
{
unsigned bi = 0;
for (;; bi++)
{
if (bi >= numBlocksMax)
bi = 0;
RINOK_THREAD(Event_Wait(&p->writeEvents[bi]))
{
const CMtCoderBlock * const block = &p->blocks[bi];
const unsigned bufIndex = block->bufIndex;
const BoolInt finished = block->finished;
if (res == SZ_OK && block->res != SZ_OK)
res = block->res;
if (bufIndex != (unsigned)(int)-1)
{
if (res == SZ_OK)
{
res = p->mtCallback->Write(p->mtCallbackObject, bufIndex);
if (res != SZ_OK)
MtProgress_SetError(&p->mtProgress, res);
}
CriticalSection_Enter(&p->cs);
{
p->freeBlockList[bufIndex] = p->freeBlockHead;
p->freeBlockHead = bufIndex;
}
CriticalSection_Leave(&p->cs);
}
RINOK_THREAD(Semaphore_Release1(&p->blocksSemaphore))
if (finished)
break;
}
}
}
#else
{
const WRes wres = Event_Wait(&p->finishedEvent);
res = MY_SRes_HRESULT_FROM_WRes(wres);
}
#endif
if (res == SZ_OK)
res = p->readRes;
if (res == SZ_OK)
res = p->mtProgress.res;
#ifndef MTCODER_USE_WRITE_THREAD
if (res == SZ_OK)
res = p->writeRes;
#endif
if (res != SZ_OK)
MtCoder_Free(p);
return res;
}
#endif
#undef RINOK_THREAD