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      1 /*---------------------------------------------------------------------------*
      2  *  pmutex.h  *
      3  *                                                                           *
      4  *  Copyright 2007, 2008 Nuance Communciations, Inc.                               *
      5  *                                                                           *
      6  *  Licensed under the Apache License, Version 2.0 (the 'License');          *
      7  *  you may not use this file except in compliance with the License.         *
      8  *                                                                           *
      9  *  You may obtain a copy of the License at                                  *
     10  *      http://www.apache.org/licenses/LICENSE-2.0                           *
     11  *                                                                           *
     12  *  Unless required by applicable law or agreed to in writing, software      *
     13  *  distributed under the License is distributed on an 'AS IS' BASIS,        *
     14  *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. *
     15  *  See the License for the specific language governing permissions and      *
     16  *  limitations under the License.                                           *
     17  *                                                                           *
     18  *---------------------------------------------------------------------------*/
     19 
     20 #ifndef __PMUTEX_H
     21 #define __PMUTEX_H
     22 
     23 #if defined(__vxworks) && !defined(REAL_PTHREADS)
     24 #undef  USE_THREAD
     25 #define USE_THREAD
     26 #undef  POSIX
     27 #define POSIX
     28 #endif
     29 
     30 
     31 
     32 #include "ESR_ReturnCode.h"
     33 
     34 #define SECOND2NSECOND	1000000000
     35 #define SECOND2MSECOND	1000
     36 #define MSECOND2NSECOND	1000000
     37 
     38 #ifdef USE_THREAD
     39 
     40 #ifdef _WIN32
     41 
     42 #ifndef WIN32_LEAN_AND_MEAN
     43 #define WIN32_LEAN_AND_MEAN
     44 #endif
     45 #include "windows.h"
     46 
     47 typedef HANDLE MUTEX;
     48 typedef HANDLE EVENT;
     49 
     50 #define createMutex(mutex, locked) \
     51   (*mutex = CreateMutex(NULL, locked, NULL)) == 0 ? ESR_MUTEX_CREATION_ERROR : ESR_SUCCESS
     52 
     53 #define lockMutex(mutex) waitForHandle(mutex, INFINITE)
     54 #define unlockMutex(mutex) (ReleaseMutex(*mutex) ? ESR_SUCCESS : ESR_FATAL_ERROR)
     55 #define deleteMutex(mutex) ((void) CloseHandle(*mutex))
     56 ESR_ReturnCode waitForHandle(HANDLE* handle, asr_uint32_t timeout);
     57 
     58 #elif defined(POSIX)
     59 
     60 #if defined(__vxworks) && !defined(REAL_PTHREADS)
     61 #include "pthread_vx.h"
     62 #else
     63 #include <pthread.h>
     64 
     65 #ifndef _POSIX_THREADS
     66 #error "Thread is not defined!"
     67 #endif
     68 #endif /* _VX_WORKS_ */
     69 
     70 typedef pthread_mutex_t MUTEX;
     71 typedef pthread_cond_t EVENT;
     72 
     73 ESR_ReturnCode createMutex_posix(MUTEX *mutex, ESR_BOOL locked);
     74 ESR_ReturnCode deleteMutex_posix(MUTEX *mutex);
     75 
     76 #define createMutex(mutex, locked) createMutex_posix(mutex, locked)
     77 #define deleteMutex(mutex) deleteMutex_posix(mutex)
     78 #define lockMutex(mutex) (pthread_mutex_lock(mutex) == 0 ? ESR_SUCCESS : ESR_FATAL_ERROR)
     79 #define unlockMutex(mutex) (pthread_mutex_unlock(mutex) == 0 ? ESR_SUCCESS : ESR_FATAL_ERROR)
     80 
     81 #else /* NON_POSIX */
     82 
     83 #error Portable Synchronization not defined for this OS!
     84 
     85 #endif /* _WIN32 */
     86 
     87 #else /* USE_THREAD */
     88 
     89 #define createMutex(mutex, locked) (ESR_SUCCESS)
     90 #define deleteMutex(mutex)
     91 #define lockMutex(mutex) ((void) 0)
     92 #define unlockMutex(mutex) ((void) 0)
     93 
     94 #endif /* USE_THREAD */
     95 
     96 #endif
     97