| /*--------------------------------------------------------------- |
| * Copyright (c) 1999,2000,2001,2002,2003 |
| * The Board of Trustees of the University of Illinois |
| * All Rights Reserved. |
| *--------------------------------------------------------------- |
| * Permission is hereby granted, free of charge, to any person |
| * obtaining a copy of this software (Iperf) and associated |
| * documentation files (the "Software"), to deal in the Software |
| * without restriction, including without limitation the |
| * rights to use, copy, modify, merge, publish, distribute, |
| * sublicense, and/or sell copies of the Software, and to permit |
| * persons to whom the Software is furnished to do |
| * so, subject to the following conditions: |
| * |
| * |
| * Redistributions of source code must retain the above |
| * copyright notice, this list of conditions and |
| * the following disclaimers. |
| * |
| * |
| * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following |
| * disclaimers in the documentation and/or other materials |
| * provided with the distribution. |
| * |
| * |
| * Neither the names of the University of Illinois, NCSA, |
| * nor the names of its contributors may be used to endorse |
| * or promote products derived from this Software without |
| * specific prior written permission. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES |
| * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
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| * ________________________________________________________________ |
| * National Laboratory for Applied Network Research |
| * National Center for Supercomputing Applications |
| * University of Illinois at Urbana-Champaign |
| * http://www.ncsa.uiuc.edu |
| * ________________________________________________________________ |
| * |
| * Mutex.h |
| * by Mark Gates <mgates@nlanr.net> |
| * ------------------------------------------------------------------- |
| * An abstract class for locking a mutex (mutual exclusion). If |
| * threads are not available, this does nothing. |
| * ------------------------------------------------------------------- */ |
| #ifndef MUTEX_H |
| #define MUTEX_H |
| |
| #include "headers.h" |
| |
| #if defined( HAVE_POSIX_THREAD ) |
| typedef pthread_mutex_t Mutex; |
| #elif defined( HAVE_WIN32_THREAD ) |
| typedef HANDLE Mutex; |
| #else |
| typedef int Mutex; |
| #endif |
| |
| /* ------------------------------------------------------------------- * |
| class Mutex { |
| public:*/ |
| |
| // initialize mutex |
| #if defined( HAVE_POSIX_THREAD ) |
| #define Mutex_Initialize( MutexPtr ) pthread_mutex_init( MutexPtr, NULL ) |
| #elif defined( HAVE_WIN32_THREAD ) |
| #define Mutex_Initialize( MutexPtr ) *MutexPtr = CreateMutex( NULL, false, NULL ) |
| #else |
| #define Mutex_Initialize( MutexPtr ) |
| #endif |
| |
| // lock the mutex variable |
| #if defined( HAVE_POSIX_THREAD ) |
| #define Mutex_Lock( MutexPtr ) pthread_mutex_lock( MutexPtr ) |
| #elif defined( HAVE_WIN32_THREAD ) |
| #define Mutex_Lock( MutexPtr ) WaitForSingleObject( *MutexPtr, INFINITE ) |
| #else |
| #define Mutex_Lock( MutexPtr ) |
| #endif |
| |
| // unlock the mutex variable |
| #if defined( HAVE_POSIX_THREAD ) |
| #define Mutex_Unlock( MutexPtr ) pthread_mutex_unlock( MutexPtr ) |
| #elif defined( HAVE_WIN32_THREAD ) |
| #define Mutex_Unlock( MutexPtr ) ReleaseMutex( *MutexPtr ) |
| #else |
| #define Mutex_Unlock( MutexPtr ) |
| #endif |
| |
| // destroy, making sure mutex is unlocked |
| #if defined( HAVE_POSIX_THREAD ) |
| #define Mutex_Destroy( MutexPtr ) do { \ |
| int rc = pthread_mutex_destroy( MutexPtr ); \ |
| if ( rc == EBUSY ) { \ |
| Mutex_Unlock( MutexPtr ); \ |
| pthread_mutex_destroy( MutexPtr ); \ |
| } \ |
| } while ( 0 ) |
| #elif defined( HAVE_WIN32_THREAD ) |
| #define Mutex_Destroy( MutexPtr ) CloseHandle( *MutexPtr ) |
| #else |
| #define Mutex_Destroy( MutexPtr ) |
| #endif |
| |
| #endif // MUTEX_H |
