81 lines
2.1 KiB
C
81 lines
2.1 KiB
C
/*-------------------------------------------------------------------------
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* drawElements Thread Library
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* ---------------------------
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*
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* Copyright 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*//*!
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* \file
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* \brief Win32 implementation of semaphore.
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*//*--------------------------------------------------------------------*/
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#include "deSemaphore.h"
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#if (DE_OS == DE_OS_WIN32 || DE_OS == DE_OS_WINCE)
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#define VC_EXTRALEAN
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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#define WIN32_SEM_MAX_VALUE 0x7fffffff
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DE_STATIC_ASSERT(sizeof(deSemaphore) >= sizeof(HANDLE));
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deSemaphore deSemaphore_create (int initialValue, const deSemaphoreAttributes* attributes)
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{
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HANDLE handle;
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DE_UNREF(attributes);
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handle = CreateSemaphore(DE_NULL, initialValue, WIN32_SEM_MAX_VALUE, DE_NULL);
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if (!handle)
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return 0;
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DE_ASSERT((deSemaphore)handle != 0);
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return (deSemaphore)handle;
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}
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void deSemaphore_destroy (deSemaphore semaphore)
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{
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HANDLE handle = (HANDLE)semaphore;
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CloseHandle(handle);
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}
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void deSemaphore_increment (deSemaphore semaphore)
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{
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HANDLE handle = (HANDLE)semaphore;
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BOOL ret = ReleaseSemaphore(handle, 1, DE_NULL);
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DE_ASSERT(ret);
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DE_UNREF(ret);
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}
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void deSemaphore_decrement (deSemaphore semaphore)
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{
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HANDLE handle = (HANDLE)semaphore;
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DWORD ret = WaitForSingleObject(handle, INFINITE);
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DE_ASSERT(ret == WAIT_OBJECT_0);
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DE_UNREF(ret);
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}
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deBool deSemaphore_tryDecrement (deSemaphore semaphore)
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{
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HANDLE handle = (HANDLE)semaphore;
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DWORD ret = WaitForSingleObject(handle, 0);
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return (ret == WAIT_OBJECT_0);
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}
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#endif /* DE_OS */
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