/usr/include/ETL/_mutex_pthreads.h is in etl-dev 0.04.19-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 | /*! ========================================================================
** Extended Template and Library
** Mutex Abstraction Class Implementation
** $Id$
**
** Copyright (c) 2002 Robert B. Quattlebaum Jr.
**
** This package is free software; you can redistribute it and/or
** modify it under the terms of the GNU General Public License as
** published by the Free Software Foundation; either version 2 of
** the License, or (at your option) any later version.
**
** This package is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
** General Public License for more details.
**
** === N O T E S ===========================================================
**
** This is an internal header file, included by other ETL headers.
** You should not attempt to use it directly.
**
** ========================================================================= */
/* === S T A R T =========================================================== */
#ifndef __ETL__MUTEX_PTHREADS_H_
#define __ETL__MUTEX_PTHREADS_H_
/* === H E A D E R S ======================================================= */
#define __USE_GNU
#include <pthread.h>
#ifdef HAVE_SCHED_H
# include <sched.h>
#endif
/* === M A C R O S ========================================================= */
/* === C L A S S E S & S T R U C T S ======================================= */
_ETL_BEGIN_NAMESPACE
class mutex
{
pthread_mutex_t mtx;
pthread_t locker;
int depth;
public:
mutex()
{
pthread_mutexattr_t attr;
pthread_mutexattr_init(&attr);
//#ifdef PTHREAD_PRIO_INHERIT
//pthread_mutexattr_setprioceiling(&attr,PTHREAD_PRIO_INHERIT);
//#endif
#ifdef PTHREAD_MUTEX_RECURSIVE
pthread_mutexattr_settype(&attr,PTHREAD_MUTEX_RECURSIVE);
#endif
pthread_mutex_init(&mtx,&attr);
pthread_mutexattr_destroy(&attr);
locker=0;
depth=0;
}
~mutex()
{ pthread_mutex_destroy(&mtx); }
//! Exception-safe mutex lock class
class lock
{
mutex *_mtx;
public:
lock(mutex &x):_mtx(&x) { _mtx->lock_mutex(); }
~lock() { _mtx->unlock_mutex(); }
mutex &get() { return *_mtx; }
};
void lock_mutex(void)
{
if(!locker || locker!=pthread_self())
{
pthread_mutex_lock(&mtx);
locker=pthread_self();
depth=0;
return;
}
depth++;
}
bool try_lock_mutex(void)
{ return !(bool) pthread_mutex_trylock(&mtx); }
void unlock_mutex(void)
{
if(depth)
{
depth--;
return;
}
pthread_mutex_unlock(&mtx);
locker=0;
}
};
_ETL_END_NAMESPACE
/* === E X T E R N S ======================================================= */
/* === E N D =============================================================== */
#endif
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