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