Lightly modified commit of lzma sdk version 9.20.
The only change from stock lzma sdk is the removal of two
.exe files, which we don't need.
Change-Id: I46287cbc416161e93b449761ebe531acd758cf95
diff --git a/C/MtCoder.c b/C/MtCoder.c
new file mode 100755
index 0000000..9f0d268
--- /dev/null
+++ b/C/MtCoder.c
@@ -0,0 +1,327 @@
+/* MtCoder.c -- Multi-thread Coder
+2010-09-24 : Igor Pavlov : Public domain */
+
+#include <stdio.h>
+
+#include "MtCoder.h"
+
+void LoopThread_Construct(CLoopThread *p)
+{
+ Thread_Construct(&p->thread);
+ Event_Construct(&p->startEvent);
+ Event_Construct(&p->finishedEvent);
+}
+
+void LoopThread_Close(CLoopThread *p)
+{
+ Thread_Close(&p->thread);
+ Event_Close(&p->startEvent);
+ Event_Close(&p->finishedEvent);
+}
+
+static THREAD_FUNC_RET_TYPE THREAD_FUNC_CALL_TYPE LoopThreadFunc(void *pp)
+{
+ CLoopThread *p = (CLoopThread *)pp;
+ for (;;)
+ {
+ if (Event_Wait(&p->startEvent) != 0)
+ return SZ_ERROR_THREAD;
+ if (p->stop)
+ return 0;
+ p->res = p->func(p->param);
+ if (Event_Set(&p->finishedEvent) != 0)
+ return SZ_ERROR_THREAD;
+ }
+}
+
+WRes LoopThread_Create(CLoopThread *p)
+{
+ p->stop = 0;
+ RINOK(AutoResetEvent_CreateNotSignaled(&p->startEvent));
+ RINOK(AutoResetEvent_CreateNotSignaled(&p->finishedEvent));
+ return Thread_Create(&p->thread, LoopThreadFunc, p);
+}
+
+WRes LoopThread_StopAndWait(CLoopThread *p)
+{
+ p->stop = 1;
+ if (Event_Set(&p->startEvent) != 0)
+ return SZ_ERROR_THREAD;
+ return Thread_Wait(&p->thread);
+}
+
+WRes LoopThread_StartSubThread(CLoopThread *p) { return Event_Set(&p->startEvent); }
+WRes LoopThread_WaitSubThread(CLoopThread *p) { return Event_Wait(&p->finishedEvent); }
+
+static SRes Progress(ICompressProgress *p, UInt64 inSize, UInt64 outSize)
+{
+ return (p && p->Progress(p, inSize, outSize) != SZ_OK) ? SZ_ERROR_PROGRESS : SZ_OK;
+}
+
+static void MtProgress_Init(CMtProgress *p, ICompressProgress *progress)
+{
+ unsigned i;
+ for (i = 0; i < NUM_MT_CODER_THREADS_MAX; i++)
+ p->inSizes[i] = p->outSizes[i] = 0;
+ p->totalInSize = p->totalOutSize = 0;
+ p->progress = progress;
+ p->res = SZ_OK;
+}
+
+static void MtProgress_Reinit(CMtProgress *p, unsigned index)
+{
+ p->inSizes[index] = 0;
+ p->outSizes[index] = 0;
+}
+
+#define UPDATE_PROGRESS(size, prev, total) \
+ if (size != (UInt64)(Int64)-1) { total += size - prev; prev = size; }
+
+SRes MtProgress_Set(CMtProgress *p, unsigned index, UInt64 inSize, UInt64 outSize)
+{
+ SRes res;
+ CriticalSection_Enter(&p->cs);
+ UPDATE_PROGRESS(inSize, p->inSizes[index], p->totalInSize)
+ UPDATE_PROGRESS(outSize, p->outSizes[index], p->totalOutSize)
+ if (p->res == SZ_OK)
+ p->res = Progress(p->progress, p->totalInSize, p->totalOutSize);
+ res = p->res;
+ CriticalSection_Leave(&p->cs);
+ return res;
+}
+
+static void MtProgress_SetError(CMtProgress *p, SRes res)
+{
+ CriticalSection_Enter(&p->cs);
+ if (p->res == SZ_OK)
+ p->res = res;
+ CriticalSection_Leave(&p->cs);
+}
+
+static void MtCoder_SetError(CMtCoder* p, SRes res)
+{
+ CriticalSection_Enter(&p->cs);
+ if (p->res == SZ_OK)
+ p->res = res;
+ CriticalSection_Leave(&p->cs);
+}
+
+/* ---------- MtThread ---------- */
+
+void CMtThread_Construct(CMtThread *p, CMtCoder *mtCoder)
+{
+ p->mtCoder = mtCoder;
+ p->outBuf = 0;
+ p->inBuf = 0;
+ Event_Construct(&p->canRead);
+ Event_Construct(&p->canWrite);
+ LoopThread_Construct(&p->thread);
+}
+
+#define RINOK_THREAD(x) { if((x) != 0) return SZ_ERROR_THREAD; }
+
+static void CMtThread_CloseEvents(CMtThread *p)
+{
+ Event_Close(&p->canRead);
+ Event_Close(&p->canWrite);
+}
+
+static void CMtThread_Destruct(CMtThread *p)
+{
+ CMtThread_CloseEvents(p);
+
+ if (Thread_WasCreated(&p->thread.thread))
+ {
+ LoopThread_StopAndWait(&p->thread);
+ LoopThread_Close(&p->thread);
+ }
+
+ if (p->mtCoder->alloc)
+ IAlloc_Free(p->mtCoder->alloc, p->outBuf);
+ p->outBuf = 0;
+
+ if (p->mtCoder->alloc)
+ IAlloc_Free(p->mtCoder->alloc, p->inBuf);
+ p->inBuf = 0;
+}
+
+#define MY_BUF_ALLOC(buf, size, newSize) \
+ if (buf == 0 || size != newSize) \
+ { IAlloc_Free(p->mtCoder->alloc, buf); \
+ size = newSize; buf = (Byte *)IAlloc_Alloc(p->mtCoder->alloc, size); \
+ if (buf == 0) return SZ_ERROR_MEM; }
+
+static SRes CMtThread_Prepare(CMtThread *p)
+{
+ MY_BUF_ALLOC(p->inBuf, p->inBufSize, p->mtCoder->blockSize)
+ MY_BUF_ALLOC(p->outBuf, p->outBufSize, p->mtCoder->destBlockSize)
+
+ p->stopReading = False;
+ p->stopWriting = False;
+ RINOK_THREAD(AutoResetEvent_CreateNotSignaled(&p->canRead));
+ RINOK_THREAD(AutoResetEvent_CreateNotSignaled(&p->canWrite));
+
+ return SZ_OK;
+}
+
+static SRes FullRead(ISeqInStream *stream, Byte *data, size_t *processedSize)
+{
+ size_t size = *processedSize;
+ *processedSize = 0;
+ while (size != 0)
+ {
+ size_t curSize = size;
+ SRes res = stream->Read(stream, data, &curSize);
+ *processedSize += curSize;
+ data += curSize;
+ size -= curSize;
+ RINOK(res);
+ if (curSize == 0)
+ return SZ_OK;
+ }
+ return SZ_OK;
+}
+
+#define GET_NEXT_THREAD(p) &p->mtCoder->threads[p->index == p->mtCoder->numThreads - 1 ? 0 : p->index + 1]
+
+static SRes MtThread_Process(CMtThread *p, Bool *stop)
+{
+ CMtThread *next;
+ *stop = True;
+ if (Event_Wait(&p->canRead) != 0)
+ return SZ_ERROR_THREAD;
+
+ next = GET_NEXT_THREAD(p);
+
+ if (p->stopReading)
+ {
+ next->stopReading = True;
+ return Event_Set(&next->canRead) == 0 ? SZ_OK : SZ_ERROR_THREAD;
+ }
+
+ {
+ size_t size = p->mtCoder->blockSize;
+ size_t destSize = p->outBufSize;
+
+ RINOK(FullRead(p->mtCoder->inStream, p->inBuf, &size));
+ next->stopReading = *stop = (size != p->mtCoder->blockSize);
+ if (Event_Set(&next->canRead) != 0)
+ return SZ_ERROR_THREAD;
+
+ RINOK(p->mtCoder->mtCallback->Code(p->mtCoder->mtCallback, p->index,
+ p->outBuf, &destSize, p->inBuf, size, *stop));
+
+ MtProgress_Reinit(&p->mtCoder->mtProgress, p->index);
+
+ if (Event_Wait(&p->canWrite) != 0)
+ return SZ_ERROR_THREAD;
+ if (p->stopWriting)
+ return SZ_ERROR_FAIL;
+ if (p->mtCoder->outStream->Write(p->mtCoder->outStream, p->outBuf, destSize) != destSize)
+ return SZ_ERROR_WRITE;
+ return Event_Set(&next->canWrite) == 0 ? SZ_OK : SZ_ERROR_THREAD;
+ }
+}
+
+static THREAD_FUNC_RET_TYPE THREAD_FUNC_CALL_TYPE ThreadFunc(void *pp)
+{
+ CMtThread *p = (CMtThread *)pp;
+ for (;;)
+ {
+ Bool stop;
+ CMtThread *next = GET_NEXT_THREAD(p);
+ SRes res = MtThread_Process(p, &stop);
+ if (res != SZ_OK)
+ {
+ MtCoder_SetError(p->mtCoder, res);
+ MtProgress_SetError(&p->mtCoder->mtProgress, res);
+ next->stopReading = True;
+ next->stopWriting = True;
+ Event_Set(&next->canRead);
+ Event_Set(&next->canWrite);
+ return res;
+ }
+ if (stop)
+ return 0;
+ }
+}
+
+void MtCoder_Construct(CMtCoder* p)
+{
+ unsigned i;
+ p->alloc = 0;
+ for (i = 0; i < NUM_MT_CODER_THREADS_MAX; i++)
+ {
+ CMtThread *t = &p->threads[i];
+ t->index = i;
+ CMtThread_Construct(t, p);
+ }
+ CriticalSection_Init(&p->cs);
+ CriticalSection_Init(&p->mtProgress.cs);
+}
+
+void MtCoder_Destruct(CMtCoder* p)
+{
+ unsigned i;
+ for (i = 0; i < NUM_MT_CODER_THREADS_MAX; i++)
+ CMtThread_Destruct(&p->threads[i]);
+ CriticalSection_Delete(&p->cs);
+ CriticalSection_Delete(&p->mtProgress.cs);
+}
+
+SRes MtCoder_Code(CMtCoder *p)
+{
+ unsigned i, numThreads = p->numThreads;
+ SRes res = SZ_OK;
+ p->res = SZ_OK;
+
+ MtProgress_Init(&p->mtProgress, p->progress);
+
+ for (i = 0; i < numThreads; i++)
+ {
+ RINOK(CMtThread_Prepare(&p->threads[i]));
+ }
+
+ for (i = 0; i < numThreads; i++)
+ {
+ CMtThread *t = &p->threads[i];
+ CLoopThread *lt = &t->thread;
+
+ if (!Thread_WasCreated(<->thread))
+ {
+ lt->func = ThreadFunc;
+ lt->param = t;
+
+ if (LoopThread_Create(lt) != SZ_OK)
+ {
+ res = SZ_ERROR_THREAD;
+ break;
+ }
+ }
+ }
+
+ if (res == SZ_OK)
+ {
+ unsigned j;
+ for (i = 0; i < numThreads; i++)
+ {
+ CMtThread *t = &p->threads[i];
+ if (LoopThread_StartSubThread(&t->thread) != SZ_OK)
+ {
+ res = SZ_ERROR_THREAD;
+ p->threads[0].stopReading = True;
+ break;
+ }
+ }
+
+ Event_Set(&p->threads[0].canWrite);
+ Event_Set(&p->threads[0].canRead);
+
+ for (j = 0; j < i; j++)
+ LoopThread_WaitSubThread(&p->threads[j].thread);
+ }
+
+ for (i = 0; i < numThreads; i++)
+ CMtThread_CloseEvents(&p->threads[i]);
+ return (res == SZ_OK) ? p->res : res;
+}