1*647f063dSAndrew Rist /************************************************************** 2cdf0e10cSrcweir * 3*647f063dSAndrew Rist * Licensed to the Apache Software Foundation (ASF) under one 4*647f063dSAndrew Rist * or more contributor license agreements. See the NOTICE file 5*647f063dSAndrew Rist * distributed with this work for additional information 6*647f063dSAndrew Rist * regarding copyright ownership. The ASF licenses this file 7*647f063dSAndrew Rist * to you under the Apache License, Version 2.0 (the 8*647f063dSAndrew Rist * "License"); you may not use this file except in compliance 9*647f063dSAndrew Rist * with the License. You may obtain a copy of the License at 10*647f063dSAndrew Rist * 11*647f063dSAndrew Rist * http://www.apache.org/licenses/LICENSE-2.0 12*647f063dSAndrew Rist * 13*647f063dSAndrew Rist * Unless required by applicable law or agreed to in writing, 14*647f063dSAndrew Rist * software distributed under the License is distributed on an 15*647f063dSAndrew Rist * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16*647f063dSAndrew Rist * KIND, either express or implied. See the License for the 17*647f063dSAndrew Rist * specific language governing permissions and limitations 18*647f063dSAndrew Rist * under the License. 19*647f063dSAndrew Rist * 20*647f063dSAndrew Rist *************************************************************/ 21*647f063dSAndrew Rist 22*647f063dSAndrew Rist 23cdf0e10cSrcweir 24cdf0e10cSrcweir #include "system.h" 25cdf0e10cSrcweir 26cdf0e10cSrcweir #include <osl/mutex.h> 27cdf0e10cSrcweir #include <osl/diagnose.h> 28cdf0e10cSrcweir 29cdf0e10cSrcweir #include <pthread.h> 30cdf0e10cSrcweir #include <stdlib.h> 31cdf0e10cSrcweir 32cdf0e10cSrcweir #if defined LINUX /* bad hack */ 33cdf0e10cSrcweir int pthread_mutexattr_setkind_np(pthread_mutexattr_t *, int); 34cdf0e10cSrcweir #define pthread_mutexattr_settype pthread_mutexattr_setkind_np 35cdf0e10cSrcweir #define PTHREAD_MUTEX_RECURSIVE PTHREAD_MUTEX_RECURSIVE_NP 36cdf0e10cSrcweir #endif 37cdf0e10cSrcweir 38cdf0e10cSrcweir /* 39cdf0e10cSrcweir Implementation notes: 40cdf0e10cSrcweir oslMutex hides a pointer to the oslMutexImpl structure, which 41cdf0e10cSrcweir ist needed to manage recursive locks on a mutex. 42cdf0e10cSrcweir 43cdf0e10cSrcweir */ 44cdf0e10cSrcweir 45cdf0e10cSrcweir typedef struct _oslMutexImpl 46cdf0e10cSrcweir { 47cdf0e10cSrcweir pthread_mutex_t mutex; 48cdf0e10cSrcweir } oslMutexImpl; 49cdf0e10cSrcweir 50cdf0e10cSrcweir 51cdf0e10cSrcweir /*****************************************************************************/ 52cdf0e10cSrcweir /* osl_createMutex */ 53cdf0e10cSrcweir /*****************************************************************************/ 54cdf0e10cSrcweir oslMutex SAL_CALL osl_createMutex() 55cdf0e10cSrcweir { 56cdf0e10cSrcweir oslMutexImpl* pMutex = (oslMutexImpl*) malloc(sizeof(oslMutexImpl)); 57cdf0e10cSrcweir pthread_mutexattr_t aMutexAttr; 58cdf0e10cSrcweir int nRet=0; 59cdf0e10cSrcweir 60cdf0e10cSrcweir OSL_ASSERT(pMutex); 61cdf0e10cSrcweir 62cdf0e10cSrcweir if ( pMutex == 0 ) 63cdf0e10cSrcweir { 64cdf0e10cSrcweir return 0; 65cdf0e10cSrcweir } 66cdf0e10cSrcweir 67cdf0e10cSrcweir pthread_mutexattr_init(&aMutexAttr); 68cdf0e10cSrcweir 69cdf0e10cSrcweir nRet = pthread_mutexattr_settype(&aMutexAttr, PTHREAD_MUTEX_RECURSIVE); 70cdf0e10cSrcweir 71cdf0e10cSrcweir nRet = pthread_mutex_init(&(pMutex->mutex), &aMutexAttr); 72cdf0e10cSrcweir if ( nRet != 0 ) 73cdf0e10cSrcweir { 74cdf0e10cSrcweir OSL_TRACE("osl_createMutex : mutex init failed. Errno: %d; %s\n", 75cdf0e10cSrcweir nRet, strerror(nRet)); 76cdf0e10cSrcweir 77cdf0e10cSrcweir free(pMutex); 78cdf0e10cSrcweir pMutex = 0; 79cdf0e10cSrcweir } 80cdf0e10cSrcweir 81cdf0e10cSrcweir pthread_mutexattr_destroy(&aMutexAttr); 82cdf0e10cSrcweir 83cdf0e10cSrcweir return (oslMutex) pMutex; 84cdf0e10cSrcweir } 85cdf0e10cSrcweir 86cdf0e10cSrcweir /*****************************************************************************/ 87cdf0e10cSrcweir /* osl_destroyMutex */ 88cdf0e10cSrcweir /*****************************************************************************/ 89cdf0e10cSrcweir void SAL_CALL osl_destroyMutex(oslMutex Mutex) 90cdf0e10cSrcweir { 91cdf0e10cSrcweir oslMutexImpl* pMutex = (oslMutexImpl*) Mutex; 92cdf0e10cSrcweir 93cdf0e10cSrcweir OSL_ASSERT(pMutex); 94cdf0e10cSrcweir 95cdf0e10cSrcweir if ( pMutex != 0 ) 96cdf0e10cSrcweir { 97cdf0e10cSrcweir int nRet=0; 98cdf0e10cSrcweir 99cdf0e10cSrcweir nRet = pthread_mutex_destroy(&(pMutex->mutex)); 100cdf0e10cSrcweir if ( nRet != 0 ) 101cdf0e10cSrcweir { 102cdf0e10cSrcweir OSL_TRACE("osl_destroyMutex : mutex destroy failed. Errno: %d; %s\n", 103cdf0e10cSrcweir nRet, strerror(nRet)); 104cdf0e10cSrcweir } 105cdf0e10cSrcweir 106cdf0e10cSrcweir free(pMutex); 107cdf0e10cSrcweir } 108cdf0e10cSrcweir 109cdf0e10cSrcweir return; 110cdf0e10cSrcweir } 111cdf0e10cSrcweir 112cdf0e10cSrcweir /*****************************************************************************/ 113cdf0e10cSrcweir /* osl_acquireMutex */ 114cdf0e10cSrcweir /*****************************************************************************/ 115cdf0e10cSrcweir sal_Bool SAL_CALL osl_acquireMutex(oslMutex Mutex) 116cdf0e10cSrcweir { 117cdf0e10cSrcweir oslMutexImpl* pMutex = (oslMutexImpl*) Mutex; 118cdf0e10cSrcweir 119cdf0e10cSrcweir OSL_ASSERT(pMutex); 120cdf0e10cSrcweir 121cdf0e10cSrcweir if ( pMutex != 0 ) 122cdf0e10cSrcweir { 123cdf0e10cSrcweir int nRet=0; 124cdf0e10cSrcweir 125cdf0e10cSrcweir nRet = pthread_mutex_lock(&(pMutex->mutex)); 126cdf0e10cSrcweir if ( nRet != 0 ) 127cdf0e10cSrcweir { 128cdf0e10cSrcweir OSL_TRACE("osl_acquireMutex : mutex lock failed. Errno: %d; %s\n", 129cdf0e10cSrcweir nRet, strerror(nRet)); 130cdf0e10cSrcweir return sal_False; 131cdf0e10cSrcweir } 132cdf0e10cSrcweir return sal_True; 133cdf0e10cSrcweir } 134cdf0e10cSrcweir 135cdf0e10cSrcweir /* not initialized */ 136cdf0e10cSrcweir return sal_False; 137cdf0e10cSrcweir } 138cdf0e10cSrcweir 139cdf0e10cSrcweir /*****************************************************************************/ 140cdf0e10cSrcweir /* osl_tryToAcquireMutex */ 141cdf0e10cSrcweir /*****************************************************************************/ 142cdf0e10cSrcweir sal_Bool SAL_CALL osl_tryToAcquireMutex(oslMutex Mutex) 143cdf0e10cSrcweir { 144cdf0e10cSrcweir oslMutexImpl* pMutex = (oslMutexImpl*) Mutex; 145cdf0e10cSrcweir 146cdf0e10cSrcweir OSL_ASSERT(pMutex); 147cdf0e10cSrcweir 148cdf0e10cSrcweir if ( pMutex ) 149cdf0e10cSrcweir { 150cdf0e10cSrcweir int nRet = 0; 151cdf0e10cSrcweir nRet = pthread_mutex_trylock(&(pMutex->mutex)); 152cdf0e10cSrcweir if ( nRet != 0 ) 153cdf0e10cSrcweir return sal_False; 154cdf0e10cSrcweir 155cdf0e10cSrcweir return sal_True; 156cdf0e10cSrcweir } 157cdf0e10cSrcweir 158cdf0e10cSrcweir /* not initialized */ 159cdf0e10cSrcweir return sal_False; 160cdf0e10cSrcweir } 161cdf0e10cSrcweir 162cdf0e10cSrcweir /*****************************************************************************/ 163cdf0e10cSrcweir /* osl_releaseMutex */ 164cdf0e10cSrcweir /*****************************************************************************/ 165cdf0e10cSrcweir sal_Bool SAL_CALL osl_releaseMutex(oslMutex Mutex) 166cdf0e10cSrcweir { 167cdf0e10cSrcweir oslMutexImpl* pMutex = (oslMutexImpl*) Mutex; 168cdf0e10cSrcweir 169cdf0e10cSrcweir OSL_ASSERT(pMutex); 170cdf0e10cSrcweir 171cdf0e10cSrcweir if ( pMutex ) 172cdf0e10cSrcweir { 173cdf0e10cSrcweir int nRet=0; 174cdf0e10cSrcweir nRet = pthread_mutex_unlock(&(pMutex->mutex)); 175cdf0e10cSrcweir if ( nRet != 0 ) 176cdf0e10cSrcweir { 177cdf0e10cSrcweir OSL_TRACE("osl_releaseMutex : mutex unlock failed. Errno: %d; %s\n", 178cdf0e10cSrcweir nRet, strerror(nRet)); 179cdf0e10cSrcweir return sal_False; 180cdf0e10cSrcweir } 181cdf0e10cSrcweir 182cdf0e10cSrcweir return sal_True; 183cdf0e10cSrcweir } 184cdf0e10cSrcweir 185cdf0e10cSrcweir /* not initialized */ 186cdf0e10cSrcweir return sal_False; 187cdf0e10cSrcweir } 188cdf0e10cSrcweir 189cdf0e10cSrcweir /*****************************************************************************/ 190cdf0e10cSrcweir /* osl_getGlobalMutex */ 191cdf0e10cSrcweir /*****************************************************************************/ 192cdf0e10cSrcweir 193cdf0e10cSrcweir static oslMutexImpl globalMutexImpl; 194cdf0e10cSrcweir 195cdf0e10cSrcweir static void globalMutexInitImpl(void) { 196cdf0e10cSrcweir pthread_mutexattr_t attr; 197cdf0e10cSrcweir if (pthread_mutexattr_init(&attr) != 0 || 198cdf0e10cSrcweir pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE) || 199cdf0e10cSrcweir pthread_mutex_init(&globalMutexImpl.mutex, &attr) != 0 || 200cdf0e10cSrcweir pthread_mutexattr_destroy(&attr) != 0) 201cdf0e10cSrcweir { 202cdf0e10cSrcweir abort(); 203cdf0e10cSrcweir } 204cdf0e10cSrcweir } 205cdf0e10cSrcweir 206cdf0e10cSrcweir oslMutex * SAL_CALL osl_getGlobalMutex() 207cdf0e10cSrcweir { 208cdf0e10cSrcweir /* necessary to get a "oslMutex *" */ 209cdf0e10cSrcweir static oslMutex globalMutex = (oslMutex) &globalMutexImpl; 210cdf0e10cSrcweir 211cdf0e10cSrcweir static pthread_once_t once = PTHREAD_ONCE_INIT; 212cdf0e10cSrcweir if (pthread_once(&once, &globalMutexInitImpl) != 0) { 213cdf0e10cSrcweir abort(); 214cdf0e10cSrcweir } 215cdf0e10cSrcweir 216cdf0e10cSrcweir return &globalMutex; 217cdf0e10cSrcweir } 218