1 /************************************************************** 2 * 3 * Licensed to the Apache Software Foundation (ASF) under one 4 * or more contributor license agreements. See the NOTICE file 5 * distributed with this work for additional information 6 * regarding copyright ownership. The ASF licenses this file 7 * to you under the Apache License, Version 2.0 (the 8 * "License"); you may not use this file except in compliance 9 * with the License. You may obtain a copy of the License at 10 * 11 * http://www.apache.org/licenses/LICENSE-2.0 12 * 13 * Unless required by applicable law or agreed to in writing, 14 * software distributed under the License is distributed on an 15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16 * KIND, either express or implied. See the License for the 17 * specific language governing permissions and limitations 18 * under the License. 19 * 20 *************************************************************/ 21 22 23 24 #include "system.h" 25 26 #include <osl/diagnose.h> 27 #include <osl/semaphor.h> 28 29 /* 30 Implemetation notes: 31 The void* represented by oslSemaphore is used 32 to store a WIN32 HANDLE. 33 */ 34 35 36 /*****************************************************************************/ 37 /* osl_createSemaphore */ 38 /*****************************************************************************/ 39 oslSemaphore SAL_CALL osl_createSemaphore(sal_uInt32 initialCount) 40 { 41 oslSemaphore Semaphore; 42 43 Semaphore= CreateSemaphore(0, initialCount, INT_MAX, 0); 44 45 /* create failed? */ 46 if((HANDLE)Semaphore == INVALID_HANDLE_VALUE) 47 { 48 Semaphore= 0; 49 } 50 51 return Semaphore; 52 } 53 54 /*****************************************************************************/ 55 /* osl_destroySemaphore */ 56 /*****************************************************************************/ 57 void SAL_CALL osl_destroySemaphore(oslSemaphore Semaphore) 58 { 59 60 61 if(Semaphore != 0) 62 { 63 CloseHandle((HANDLE)Semaphore); 64 } 65 66 } 67 68 /*****************************************************************************/ 69 /* osl_acquireSemaphore */ 70 /*****************************************************************************/ 71 sal_Bool SAL_CALL osl_acquireSemaphore(oslSemaphore Semaphore) 72 { 73 OSL_ASSERT(Semaphore != 0); 74 75 switch ( WaitForSingleObject( (HANDLE)Semaphore, INFINITE ) ) 76 { 77 case WAIT_OBJECT_0: 78 return sal_True; 79 80 default: 81 return (sal_False); 82 } 83 } 84 85 /*****************************************************************************/ 86 /* osl_tryToAcquireSemaphore */ 87 /*****************************************************************************/ 88 sal_Bool SAL_CALL osl_tryToAcquireSemaphore(oslSemaphore Semaphore) 89 { 90 OSL_ASSERT(Semaphore != 0); 91 return (sal_Bool)(WaitForSingleObject((HANDLE)Semaphore, 0) == WAIT_OBJECT_0); 92 } 93 94 95 /*****************************************************************************/ 96 /* osl_releaseSemaphore */ 97 /*****************************************************************************/ 98 sal_Bool SAL_CALL osl_releaseSemaphore(oslSemaphore Semaphore) 99 { 100 OSL_ASSERT(Semaphore != 0); 101 102 /* increase count by one, not interested in previous count */ 103 return (sal_Bool)(ReleaseSemaphore((HANDLE)Semaphore, 1, NULL) != FALSE); 104 } 105 106 107 108