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96 lines
2.7 KiB
C
96 lines
2.7 KiB
C
/* Threads.c -- multithreading library
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2017-06-26 : Igor Pavlov : Public domain */
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#include "Precomp.h"
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#ifndef UNDER_CE
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#include <process.h>
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#endif
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#include "Threads.h"
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static WRes GetError()
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{
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DWORD res = GetLastError();
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return res ? (WRes)res : 1;
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}
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static WRes HandleToWRes(HANDLE h) { return (h != NULL) ? 0 : GetError(); }
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static WRes BOOLToWRes(BOOL v) { return v ? 0 : GetError(); }
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WRes HandlePtr_Close(HANDLE *p)
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{
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if (*p != NULL)
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{
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if (!CloseHandle(*p))
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return GetError();
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*p = NULL;
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}
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return 0;
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}
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WRes Handle_WaitObject(HANDLE h) { return (WRes)WaitForSingleObject(h, INFINITE); }
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WRes Thread_Create(CThread *p, THREAD_FUNC_TYPE func, LPVOID param)
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{
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/* Windows Me/98/95: threadId parameter may not be NULL in _beginthreadex/CreateThread functions */
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#ifdef UNDER_CE
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DWORD threadId;
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*p = CreateThread(0, 0, func, param, 0, &threadId);
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#else
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unsigned threadId;
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*p = (HANDLE)_beginthreadex(NULL, 0, func, param, 0, &threadId);
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#endif
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/* maybe we must use errno here, but probably GetLastError() is also OK. */
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return HandleToWRes(*p);
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}
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static WRes Event_Create(CEvent *p, BOOL manualReset, int signaled)
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{
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*p = CreateEvent(NULL, manualReset, (signaled ? TRUE : FALSE), NULL);
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return HandleToWRes(*p);
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}
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WRes Event_Set(CEvent *p) { return BOOLToWRes(SetEvent(*p)); }
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WRes Event_Reset(CEvent *p) { return BOOLToWRes(ResetEvent(*p)); }
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WRes ManualResetEvent_Create(CManualResetEvent *p, int signaled) { return Event_Create(p, TRUE, signaled); }
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WRes AutoResetEvent_Create(CAutoResetEvent *p, int signaled) { return Event_Create(p, FALSE, signaled); }
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WRes ManualResetEvent_CreateNotSignaled(CManualResetEvent *p) { return ManualResetEvent_Create(p, 0); }
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WRes AutoResetEvent_CreateNotSignaled(CAutoResetEvent *p) { return AutoResetEvent_Create(p, 0); }
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WRes Semaphore_Create(CSemaphore *p, UInt32 initCount, UInt32 maxCount)
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{
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*p = CreateSemaphore(NULL, (LONG)initCount, (LONG)maxCount, NULL);
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return HandleToWRes(*p);
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}
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static WRes Semaphore_Release(CSemaphore *p, LONG releaseCount, LONG *previousCount)
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{ return BOOLToWRes(ReleaseSemaphore(*p, releaseCount, previousCount)); }
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WRes Semaphore_ReleaseN(CSemaphore *p, UInt32 num)
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{ return Semaphore_Release(p, (LONG)num, NULL); }
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WRes Semaphore_Release1(CSemaphore *p) { return Semaphore_ReleaseN(p, 1); }
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WRes CriticalSection_Init(CCriticalSection *p)
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{
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/* InitializeCriticalSection can raise only STATUS_NO_MEMORY exception */
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#ifdef _MSC_VER
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__try
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#endif
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{
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InitializeCriticalSection(p);
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/* InitializeCriticalSectionAndSpinCount(p, 0); */
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}
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#ifdef _MSC_VER
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__except (EXCEPTION_EXECUTE_HANDLER) { return 1; }
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#endif
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return 0;
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}
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