| /************************************************************** |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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. |
| * |
| *************************************************************/ |
| |
| |
| |
| #include "system.h" |
| |
| #include <osl/diagnose.h> |
| #include <osl/semaphor.h> |
| |
| /* |
| Implemetation notes: |
| The void* represented by oslSemaphore is used |
| to store a WIN32 HANDLE. |
| */ |
| |
| |
| /*****************************************************************************/ |
| /* osl_createSemaphore */ |
| /*****************************************************************************/ |
| oslSemaphore SAL_CALL osl_createSemaphore(sal_uInt32 initialCount) |
| { |
| oslSemaphore Semaphore; |
| |
| Semaphore= CreateSemaphore(0, initialCount, INT_MAX, 0); |
| |
| /* create failed? */ |
| if((HANDLE)Semaphore == INVALID_HANDLE_VALUE) |
| { |
| Semaphore= 0; |
| } |
| |
| return Semaphore; |
| } |
| |
| /*****************************************************************************/ |
| /* osl_destroySemaphore */ |
| /*****************************************************************************/ |
| void SAL_CALL osl_destroySemaphore(oslSemaphore Semaphore) |
| { |
| |
| |
| if(Semaphore != 0) |
| { |
| CloseHandle((HANDLE)Semaphore); |
| } |
| |
| } |
| |
| /*****************************************************************************/ |
| /* osl_acquireSemaphore */ |
| /*****************************************************************************/ |
| sal_Bool SAL_CALL osl_acquireSemaphore(oslSemaphore Semaphore) |
| { |
| OSL_ASSERT(Semaphore != 0); |
| |
| switch ( WaitForSingleObject( (HANDLE)Semaphore, INFINITE ) ) |
| { |
| case WAIT_OBJECT_0: |
| return sal_True; |
| |
| default: |
| return (sal_False); |
| } |
| } |
| |
| /*****************************************************************************/ |
| /* osl_tryToAcquireSemaphore */ |
| /*****************************************************************************/ |
| sal_Bool SAL_CALL osl_tryToAcquireSemaphore(oslSemaphore Semaphore) |
| { |
| OSL_ASSERT(Semaphore != 0); |
| return (sal_Bool)(WaitForSingleObject((HANDLE)Semaphore, 0) == WAIT_OBJECT_0); |
| } |
| |
| |
| /*****************************************************************************/ |
| /* osl_releaseSemaphore */ |
| /*****************************************************************************/ |
| sal_Bool SAL_CALL osl_releaseSemaphore(oslSemaphore Semaphore) |
| { |
| OSL_ASSERT(Semaphore != 0); |
| |
| /* increase count by one, not interested in previous count */ |
| return (sal_Bool)(ReleaseSemaphore((HANDLE)Semaphore, 1, NULL) != FALSE); |
| } |
| |
| |
| |