Semaphore::Semaphore()
{
#if BX_PLATFORM_XBOXONE || BX_PLATFORM_WINRT
m_handle = CreateSemaphoreExW(NULL, 0, LONG_MAX, NULL, 0, SEMAPHORE_ALL_ACCESS);
#else
m_handle = CreateSemaphoreA(NULL, 0, LONG_MAX, NULL);
#endif
BX_CHECK(NULL != m_handle, "Failed to create Semaphore!");
}
int sem_init(sem_t* sem, int pshared, unsigned int value)
{
if(!sem)
{
return EINVAL;
}
UNREFERENCED_PARAMETER(pshared);
*sem = CreateSemaphoreExW(NULL, value, LONG_MAX, NULL, 0, SEMAPHORE_ALL_ACCESS);
return 0;
}
/*
* @implemented
*/
HANDLE
WINAPI
CreateSemaphoreW(IN LPSECURITY_ATTRIBUTES lpSemaphoreAttributes OPTIONAL,
IN LONG lInitialCount,
IN LONG lMaximumCount,
IN LPCWSTR lpName OPTIONAL)
{
return CreateSemaphoreExW(lpSemaphoreAttributes,
lInitialCount,
lMaximumCount,
lpName,
0,
SEMAPHORE_ALL_ACCESS);
}
/*
* @implemented
*/
HANDLE
WINAPI
CreateSemaphoreExA(IN LPSECURITY_ATTRIBUTES lpSemaphoreAttributes OPTIONAL,
IN LONG lInitialCount,
IN LONG lMaximumCount,
IN LPCSTR lpName OPTIONAL,
IN DWORD dwFlags,
IN DWORD dwDesiredAccess)
{
NTSTATUS Status;
ANSI_STRING AnsiName;
PUNICODE_STRING UnicodeCache;
LPCWSTR UnicodeName = NULL;
/* Check for a name */
if (lpName)
{
/* Use TEB Cache */
UnicodeCache = &NtCurrentTeb()->StaticUnicodeString;
/* Convert to unicode */
RtlInitAnsiString(&AnsiName, lpName);
Status = RtlAnsiStringToUnicodeString(UnicodeCache, &AnsiName, FALSE);
if (!NT_SUCCESS(Status))
{
/* Conversion failed */
SetLastErrorByStatus(Status);
return NULL;
}
/* Otherwise, save the buffer */
UnicodeName = (LPCWSTR)UnicodeCache->Buffer;
}
/* Call the Unicode API */
return CreateSemaphoreExW(lpSemaphoreAttributes,
lInitialCount,
lMaximumCount,
UnicodeName,
dwFlags,
dwDesiredAccess);
}
asCThreadReadWriteLock::asCThreadReadWriteLock()
{
#if defined AS_POSIX_THREADS
int r = pthread_rwlock_init(&lock, 0);
asASSERT( r == 0 );
UNUSED_VAR(r);
#elif defined AS_WINDOWS_THREADS
#if defined(_MSC_VER) && (WINAPI_FAMILY & WINAPI_FAMILY_PHONE_APP)
// Only the Ex versions are available on Windows Store
// Create a semaphore to allow up to maxReaders simultaneous readers
readLocks = CreateSemaphoreExW(NULL, maxReaders, maxReaders, 0, 0, 0);
// Create a critical section to synchronize writers
InitializeCriticalSectionEx(&writeLock, 4000, 0);
#else
readLocks = CreateSemaphoreW(NULL, maxReaders, maxReaders, 0);
InitializeCriticalSection(&writeLock);
#endif
#endif
}