1 /* Threads.c -- multithreading library
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2 2014-09-21 : Igor Pavlov : Public domain */
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10 #include "Threads.h"
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12 static WRes GetError()
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14 DWORD res = GetLastError();
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15 return (res) ? (WRes)(res) : 1;
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18 WRes HandleToWRes(HANDLE h) { return (h != 0) ? 0 : GetError(); }
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19 WRes BOOLToWRes(BOOL v) { return v ? 0 : GetError(); }
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21 WRes HandlePtr_Close(HANDLE *p)
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24 if (!CloseHandle(*p))
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30 WRes Handle_WaitObject(HANDLE h) { return (WRes)WaitForSingleObject(h, INFINITE); }
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32 WRes Thread_Create(CThread *p, THREAD_FUNC_TYPE func, LPVOID param)
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34 /* Windows Me/98/95: threadId parameter may not be NULL in _beginthreadex/CreateThread functions */
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39 *p = CreateThread(0, 0, func, param, 0, &threadId);
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44 *p = (HANDLE)_beginthreadex(NULL, 0, func, param, 0, &threadId);
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48 /* maybe we must use errno here, but probably GetLastError() is also OK. */
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49 return HandleToWRes(*p);
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52 WRes Event_Create(CEvent *p, BOOL manualReset, int signaled)
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54 *p = CreateEvent(NULL, manualReset, (signaled ? TRUE : FALSE), NULL);
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55 return HandleToWRes(*p);
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58 WRes Event_Set(CEvent *p) { return BOOLToWRes(SetEvent(*p)); }
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59 WRes Event_Reset(CEvent *p) { return BOOLToWRes(ResetEvent(*p)); }
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61 WRes ManualResetEvent_Create(CManualResetEvent *p, int signaled) { return Event_Create(p, TRUE, signaled); }
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62 WRes AutoResetEvent_Create(CAutoResetEvent *p, int signaled) { return Event_Create(p, FALSE, signaled); }
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63 WRes ManualResetEvent_CreateNotSignaled(CManualResetEvent *p) { return ManualResetEvent_Create(p, 0); }
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64 WRes AutoResetEvent_CreateNotSignaled(CAutoResetEvent *p) { return AutoResetEvent_Create(p, 0); }
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67 WRes Semaphore_Create(CSemaphore *p, UInt32 initCount, UInt32 maxCount)
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69 *p = CreateSemaphore(NULL, (LONG)initCount, (LONG)maxCount, NULL);
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70 return HandleToWRes(*p);
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73 static WRes Semaphore_Release(CSemaphore *p, LONG releaseCount, LONG *previousCount)
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74 { return BOOLToWRes(ReleaseSemaphore(*p, releaseCount, previousCount)); }
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75 WRes Semaphore_ReleaseN(CSemaphore *p, UInt32 num)
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76 { return Semaphore_Release(p, (LONG)num, NULL); }
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77 WRes Semaphore_Release1(CSemaphore *p) { return Semaphore_ReleaseN(p, 1); }
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79 WRes CriticalSection_Init(CCriticalSection *p)
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81 /* InitializeCriticalSection can raise only STATUS_NO_MEMORY exception */
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86 InitializeCriticalSection(p);
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87 /* InitializeCriticalSectionAndSpinCount(p, 0); */
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90 __except (EXCEPTION_EXECUTE_HANDLER) { return 1; }
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