Stone Three Foundation Classes

00001 /*
00002  * Stone Three Foundation Class (s3fc) provides a number of utility classes.
00003  * Copyright (C) 2001 by Stone Three Signal Processing (Pty) Ltd.
00004  *
00005  * Authored by Stone Three Signal Processing (Pty) Ltd.
00006  *
00007  * This library is free software; you can redistribute it and/or
00008  * modify it under the terms of the GNU Lesser General Public
00009  * License as published by the Free Software Foundation; either
00010  * version 2.1 of the License, or (at your option) any later version.
00011  * 
00012  * This library is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00015  * Lesser General Public License for more details.
00016  * 
00017  * You should have received a copy of the GNU Lesser General Public
00018  * License along with this library; if not, write to the Free Software
00019  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00020  * 
00021  * Please see the file 'COPYING' in the source root directory.
00022  */
00023 
00033 #include <s3fc/s3_condition.h>
00034 #include <s3fc/s3_exception.h>
00035 
00036 #ifndef CONST_OVERRIDE_COND_T
00037 #define CONST_OVERRIDE_COND_T(x) const_cast<pthread_cond_t*>(x)
00038 #endif
00039 
00040 #ifndef CONST_OVERRIDE_MUTEX_T
00041 #define CONST_OVERRIDE_MUTEX_T(x) const_cast<pthread_mutex_t*>(x)
00042 #endif
00043 
00044 //
00045 s3_condition::s3_condition() 
00046 {
00047    // this always works (or anyway doesn't tell you if it fails)
00048    pthread_cond_init(&cond, 0);
00049 }
00050 
00051 //
00052 s3_condition::~s3_condition()
00053 {
00054    if ( pthread_cond_destroy(CONST_OVERRIDE_COND_T(&cond)) != 0 )
00055    {
00056       throw s3_generic_exception("s3_mutex::~s3_mutex()",
00057                                  "Attempted to destroy condition with "
00058              "threads waiting on it");
00059    }
00060 }
00061 
00062 //
00063 void s3_condition::wait(const s3_mutex& mutex) const
00064 {
00065    pthread_cond_wait(CONST_OVERRIDE_COND_T(&cond), 
00066            CONST_OVERRIDE_MUTEX_T(&(mutex.mutex)));
00067 }
00068 
00069    
00070 //
00071 void s3_condition::signal() const
00072 {
00073    pthread_cond_signal(CONST_OVERRIDE_COND_T(&cond));
00074 }
00075 
00076 //
00077 void s3_condition::broadcast() const
00078 {
00079    pthread_cond_broadcast(CONST_OVERRIDE_COND_T(&cond));
00080 }
s3_condition.cc
