4.44 beta

C/Threads.c

@@ -0,0 +1,97 @@
+/* Threads.c */
+
+#include "Threads.h"
+#include <process.h>
+
+HRes GetError()
+{
+  DWORD res = GetLastError();
+  return (res) ? (HRes)(res) : SZE_FAIL;
+}
+
+HRes BoolToHRes(int v) { return v ? SZ_OK : GetError(); }
+HRes BOOLToHRes(BOOL v) { return v ? SZ_OK : GetError(); }
+
+HRes MyCloseHandle(HANDLE *h)
+{
+  if (*h != NULL)
+    if (!CloseHandle(*h))
+      return GetError();
+  *h = NULL;
+  return SZ_OK;
+}
+
+HRes Thread_Create(CThread *thread, unsigned (StdCall *startAddress)(void *), LPVOID parameter)
+{ 
+  /* DWORD threadId; */
+  thread->handle = 
+    /* CreateThread(0, 0, startAddress, parameter, 0, &threadId); */
+    (HANDLE)_beginthreadex(NULL, 0, startAddress, parameter, 0, NULL);
+    /* maybe we must use errno here, but probably GetLastError() is also OK. */
+  return BoolToHRes(thread->handle != 0);
+}
+
+HRes WaitObject(HANDLE h)
+{
+  return (HRes)WaitForSingleObject(h, INFINITE); 
+}
+
+HRes Thread_Wait(CThread *thread)
+{
+  if (thread->handle == NULL)
+    return 1;
+  return WaitObject(thread->handle); 
+}
+
+HRes Thread_Close(CThread *thread)
+{
+  return MyCloseHandle(&thread->handle);
+}
+
+HRes AutoResetEvent_Create(CAutoResetEvent *p, int initialSignaled)
+{
+  p->handle = CreateEvent(NULL, FALSE, (initialSignaled ? TRUE : FALSE), NULL);
+  return BoolToHRes(p->handle != 0);
+}
+
+HRes AutoResetEvent_CreateNotSignaled(CAutoResetEvent *p) { return AutoResetEvent_Create(p, 0); }
+HRes Event_Set(CEvent *p) { return BOOLToHRes(SetEvent(p->handle)); }
+HRes Event_Reset(CEvent *p) { return BOOLToHRes(ResetEvent(p->handle)); }
+HRes Event_Wait(CEvent *p) { return WaitObject(p->handle); }
+HRes Event_Close(CEvent *p) { return MyCloseHandle(&p->handle); }
+
+
+HRes Semaphore_Create(CSemaphore *p, UInt32 initiallyCount, UInt32 maxCount)
+{
+  p->handle = CreateSemaphore(NULL, (LONG)initiallyCount, (LONG)maxCount, NULL);
+  return BoolToHRes(p->handle != 0);
+}
+
+HRes Semaphore_Release(CSemaphore *p, LONG releaseCount, LONG *previousCount) 
+{ 
+  return BOOLToHRes(ReleaseSemaphore(p->handle, releaseCount, previousCount)); 
+}
+HRes Semaphore_ReleaseN(CSemaphore *p, LONG releaseCount)
+{
+  return Semaphore_Release(p, releaseCount, NULL);
+}
+HRes Semaphore_Release1(CSemaphore *p)
+{
+  return Semaphore_ReleaseN(p, 1);
+}
+
+HRes Semaphore_Wait(CSemaphore *p) { return WaitObject(p->handle); }
+HRes Semaphore_Close(CSemaphore *p) { return MyCloseHandle(&p->handle); }
+
+HRes CriticalSection_Init(CCriticalSection *p)
+{
+  /* InitializeCriticalSection can raise only STATUS_NO_MEMORY exception */
+  __try 
+  { 
+    InitializeCriticalSection(p); 
+    // InitializeCriticalSectionAndSpinCount(p, 0);
+  }  
+  __except (EXCEPTION_EXECUTE_HANDLER) { return SZE_OUTOFMEMORY; }
+  return SZ_OK;
+}
+