From 1ef05f24e28938c7a0608b4c6b369094d1dccaa6 Mon Sep 17 00:00:00 2001
From: Mounir IDRASSI <mounir.idrassi@idrix.fr>
Date: Wed, 9 Feb 2022 23:47:25 +0100
Subject: Windows: Reduce the size of installers by almost 50% by using LZMA
 compression instead of DEFLATE

---
 src/Common/lzma/LzFindMt.h | 109 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 109 insertions(+)
 create mode 100644 src/Common/lzma/LzFindMt.h

(limited to 'src/Common/lzma/LzFindMt.h')

diff --git a/src/Common/lzma/LzFindMt.h b/src/Common/lzma/LzFindMt.h
new file mode 100644
index 00000000..660b7244
--- /dev/null
+++ b/src/Common/lzma/LzFindMt.h
@@ -0,0 +1,109 @@
+/* LzFindMt.h -- multithreaded Match finder for LZ algorithms
+2021-07-12 : Igor Pavlov : Public domain */
+
+#ifndef __LZ_FIND_MT_H
+#define __LZ_FIND_MT_H
+
+#include "LzFind.h"
+#include "Threads.h"
+
+EXTERN_C_BEGIN
+
+typedef struct _CMtSync
+{
+  UInt32 numProcessedBlocks;
+  CThread thread;
+  UInt64 affinity;
+
+  BoolInt wasCreated;
+  BoolInt needStart;
+  BoolInt csWasInitialized;
+  BoolInt csWasEntered;
+
+  BoolInt exit;
+  BoolInt stopWriting;
+
+  CAutoResetEvent canStart;
+  CAutoResetEvent wasStopped;
+  CSemaphore freeSemaphore;
+  CSemaphore filledSemaphore;
+  CCriticalSection cs;
+  // UInt32 numBlocks_Sent;
+} CMtSync;
+
+typedef UInt32 * (*Mf_Mix_Matches)(void *p, UInt32 matchMinPos, UInt32 *distances);
+
+/* kMtCacheLineDummy must be >= size_of_CPU_cache_line */
+#define kMtCacheLineDummy 128
+
+typedef void (*Mf_GetHeads)(const Byte *buffer, UInt32 pos,
+  UInt32 *hash, UInt32 hashMask, UInt32 *heads, UInt32 numHeads, const UInt32 *crc);
+
+typedef struct _CMatchFinderMt
+{
+  /* LZ */
+  const Byte *pointerToCurPos;
+  UInt32 *btBuf;
+  const UInt32 *btBufPos;
+  const UInt32 *btBufPosLimit;
+  UInt32 lzPos;
+  UInt32 btNumAvailBytes;
+
+  UInt32 *hash;
+  UInt32 fixedHashSize;
+  // UInt32 hash4Mask;
+  UInt32 historySize;
+  const UInt32 *crc;
+
+  Mf_Mix_Matches MixMatchesFunc;
+  UInt32 failure_LZ_BT; // failure in BT transfered to LZ
+  // UInt32 failure_LZ_LZ; // failure in LZ tables
+  UInt32 failureBuf[1];
+  // UInt32 crc[256];
+
+  /* LZ + BT */
+  CMtSync btSync;
+  Byte btDummy[kMtCacheLineDummy];
+
+  /* BT */
+  UInt32 *hashBuf;
+  UInt32 hashBufPos;
+  UInt32 hashBufPosLimit;
+  UInt32 hashNumAvail;
+  UInt32 failure_BT;
+
+
+  CLzRef *son;
+  UInt32 matchMaxLen;
+  UInt32 numHashBytes;
+  UInt32 pos;
+  const Byte *buffer;
+  UInt32 cyclicBufferPos;
+  UInt32 cyclicBufferSize; /* it must be = (historySize + 1) */
+  UInt32 cutValue;
+
+  /* BT + Hash */
+  CMtSync hashSync;
+  /* Byte hashDummy[kMtCacheLineDummy]; */
+  
+  /* Hash */
+  Mf_GetHeads GetHeadsFunc;
+  CMatchFinder *MatchFinder;
+  // CMatchFinder MatchFinder;
+} CMatchFinderMt;
+
+// only for Mt part
+void MatchFinderMt_Construct(CMatchFinderMt *p);
+void MatchFinderMt_Destruct(CMatchFinderMt *p, ISzAllocPtr alloc);
+
+SRes MatchFinderMt_Create(CMatchFinderMt *p, UInt32 historySize, UInt32 keepAddBufferBefore,
+    UInt32 matchMaxLen, UInt32 keepAddBufferAfter, ISzAllocPtr alloc);
+void MatchFinderMt_CreateVTable(CMatchFinderMt *p, IMatchFinder2 *vTable);
+
+/* call MatchFinderMt_InitMt() before IMatchFinder::Init() */
+SRes MatchFinderMt_InitMt(CMatchFinderMt *p);
+void MatchFinderMt_ReleaseStream(CMatchFinderMt *p);
+
+EXTERN_C_END
+
+#endif
-- 
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