BaseTools/Source/C/LzmaCompress/Sdk/C/Threads.c

   1 /* Threads.c -- multithreading library
   2 2014-09-21 : Igor Pavlov : Public domain */
   3
   4 #include "Precomp.h"
   5
   6 #ifndef UNDER_CE
   7 #include <process.h>
   8 #endif
   9
  10 #include "Threads.h"
  11
  12 static WRes GetError()
  13 {
  14   DWORD res = GetLastError();
  15   return (res) ? (WRes)(res) : 1;
  16 }
  17
  18 WRes HandleToWRes(HANDLE h) { return (h != 0) ? 0 : GetError(); }
  19 WRes BOOLToWRes(BOOL v) { return v ? 0 : GetError(); }
  20
  21 WRes HandlePtr_Close(HANDLE *p)
  22 {
  23   if (*p != NULL)
  24     if (!CloseHandle(*p))
  25       return GetError();
  26   *p = NULL;
  27   return 0;
  28 }
  29
  30 WRes Handle_WaitObject(HANDLE h) { return (WRes)WaitForSingleObject(h, INFINITE); }
  31
  32 WRes Thread_Create(CThread *p, THREAD_FUNC_TYPE func, LPVOID param)
  33 {
  34   /* Windows Me/98/95: threadId parameter may not be NULL in _beginthreadex/CreateThread functions */
  35
  36   #ifdef UNDER_CE
  37
  38   DWORD threadId;
  39   *p = CreateThread(0, 0, func, param, 0, &threadId);
  40
  41   #else
  42
  43   unsigned threadId;
  44   *p = (HANDLE)_beginthreadex(NULL, 0, func, param, 0, &threadId);
  45
  46   #endif
  47
  48   /* maybe we must use errno here, but probably GetLastError() is also OK. */
  49   return HandleToWRes(*p);
  50 }
  51
  52 WRes Event_Create(CEvent *p, BOOL manualReset, int signaled)
  53 {
  54   *p = CreateEvent(NULL, manualReset, (signaled ? TRUE : FALSE), NULL);
  55   return HandleToWRes(*p);
  56 }
  57
  58 WRes Event_Set(CEvent *p) { return BOOLToWRes(SetEvent(*p)); }
  59 WRes Event_Reset(CEvent *p) { return BOOLToWRes(ResetEvent(*p)); }
  60
  61 WRes ManualResetEvent_Create(CManualResetEvent *p, int signaled) { return Event_Create(p, TRUE, signaled); }
  62 WRes AutoResetEvent_Create(CAutoResetEvent *p, int signaled) { return Event_Create(p, FALSE, signaled); }
  63 WRes ManualResetEvent_CreateNotSignaled(CManualResetEvent *p) { return ManualResetEvent_Create(p, 0); }
  64 WRes AutoResetEvent_CreateNotSignaled(CAutoResetEvent *p) { return AutoResetEvent_Create(p, 0); }
  65
  66
  67 WRes Semaphore_Create(CSemaphore *p, UInt32 initCount, UInt32 maxCount)
  68 {
  69   *p = CreateSemaphore(NULL, (LONG)initCount, (LONG)maxCount, NULL);
  70   return HandleToWRes(*p);
  71 }
  72
  73 static WRes Semaphore_Release(CSemaphore *p, LONG releaseCount, LONG *previousCount)
  74   { return BOOLToWRes(ReleaseSemaphore(*p, releaseCount, previousCount)); }
  75 WRes Semaphore_ReleaseN(CSemaphore *p, UInt32 num)
  76   { return Semaphore_Release(p, (LONG)num, NULL); }
  77 WRes Semaphore_Release1(CSemaphore *p) { return Semaphore_ReleaseN(p, 1); }
  78
  79 WRes CriticalSection_Init(CCriticalSection *p)
  80 {
  81   /* InitializeCriticalSection can raise only STATUS_NO_MEMORY exception */
  82   #ifdef _MSC_VER
  83   __try
  84   #endif
  85   {
  86     InitializeCriticalSection(p);
  87     /* InitializeCriticalSectionAndSpinCount(p, 0); */
  88   }
  89   #ifdef _MSC_VER
  90   __except (EXCEPTION_EXECUTE_HANDLER) { return 1; }
  91   #endif
  92   return 0;
  93 }