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authorRemko Tronçon <git@el-tramo.be>2009-06-01 08:48:42 (GMT)
committerRemko Tronçon <git@el-tramo.be>2009-06-01 09:24:28 (GMT)
commit2812bddd81f8a1b804c7460f4e14cd0aa393d129 (patch)
treed46294f35150c4f0f43deaf2d31fceaf945ae715 /3rdParty/Boost/boost/thread/pthread/mutex.hpp
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+#ifndef BOOST_THREAD_PTHREAD_MUTEX_HPP
+#define BOOST_THREAD_PTHREAD_MUTEX_HPP
+// (C) Copyright 2007-8 Anthony Williams
+// Distributed under the Boost Software License, Version 1.0. (See
+// accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+
+#include <pthread.h>
+#include <boost/utility.hpp>
+#include <boost/thread/exceptions.hpp>
+#include <boost/thread/locks.hpp>
+#include <boost/thread/thread_time.hpp>
+#include <boost/thread/xtime.hpp>
+#include <boost/assert.hpp>
+#include <errno.h>
+#include "timespec.hpp"
+#include "pthread_mutex_scoped_lock.hpp"
+
+#ifdef _POSIX_TIMEOUTS
+#if _POSIX_TIMEOUTS >= 0
+#define BOOST_PTHREAD_HAS_TIMEDLOCK
+#endif
+#endif
+
+#include <boost/config/abi_prefix.hpp>
+
+namespace boost
+{
+ class mutex:
+ boost::noncopyable
+ {
+ private:
+ pthread_mutex_t m;
+ public:
+ mutex()
+ {
+ int const res=pthread_mutex_init(&m,NULL);
+ if(res)
+ {
+ throw thread_resource_error();
+ }
+ }
+ ~mutex()
+ {
+ BOOST_VERIFY(!pthread_mutex_destroy(&m));
+ }
+
+ void lock()
+ {
+ BOOST_VERIFY(!pthread_mutex_lock(&m));
+ }
+
+ void unlock()
+ {
+ BOOST_VERIFY(!pthread_mutex_unlock(&m));
+ }
+
+ bool try_lock()
+ {
+ int const res=pthread_mutex_trylock(&m);
+ BOOST_ASSERT(!res || res==EBUSY);
+ return !res;
+ }
+
+ typedef pthread_mutex_t* native_handle_type;
+ native_handle_type native_handle()
+ {
+ return &m;
+ }
+
+ typedef unique_lock<mutex> scoped_lock;
+ typedef detail::try_lock_wrapper<mutex> scoped_try_lock;
+ };
+
+ typedef mutex try_mutex;
+
+ class timed_mutex:
+ boost::noncopyable
+ {
+ private:
+ pthread_mutex_t m;
+#ifndef BOOST_PTHREAD_HAS_TIMEDLOCK
+ pthread_cond_t cond;
+ bool is_locked;
+#endif
+ public:
+ timed_mutex()
+ {
+ int const res=pthread_mutex_init(&m,NULL);
+ if(res)
+ {
+ throw thread_resource_error();
+ }
+#ifndef BOOST_PTHREAD_HAS_TIMEDLOCK
+ int const res2=pthread_cond_init(&cond,NULL);
+ if(res2)
+ {
+ BOOST_VERIFY(!pthread_mutex_destroy(&m));
+ throw thread_resource_error();
+ }
+ is_locked=false;
+#endif
+ }
+ ~timed_mutex()
+ {
+ BOOST_VERIFY(!pthread_mutex_destroy(&m));
+#ifndef BOOST_PTHREAD_HAS_TIMEDLOCK
+ BOOST_VERIFY(!pthread_cond_destroy(&cond));
+#endif
+ }
+
+ template<typename TimeDuration>
+ bool timed_lock(TimeDuration const & relative_time)
+ {
+ return timed_lock(get_system_time()+relative_time);
+ }
+ bool timed_lock(boost::xtime const & absolute_time)
+ {
+ return timed_lock(system_time(absolute_time));
+ }
+
+#ifdef BOOST_PTHREAD_HAS_TIMEDLOCK
+ void lock()
+ {
+ BOOST_VERIFY(!pthread_mutex_lock(&m));
+ }
+
+ void unlock()
+ {
+ BOOST_VERIFY(!pthread_mutex_unlock(&m));
+ }
+
+ bool try_lock()
+ {
+ int const res=pthread_mutex_trylock(&m);
+ BOOST_ASSERT(!res || res==EBUSY);
+ return !res;
+ }
+ bool timed_lock(system_time const & abs_time)
+ {
+ struct timespec const timeout=detail::get_timespec(abs_time);
+ int const res=pthread_mutex_timedlock(&m,&timeout);
+ BOOST_ASSERT(!res || res==ETIMEDOUT);
+ return !res;
+ }
+
+ typedef pthread_mutex_t* native_handle_type;
+ native_handle_type native_handle()
+ {
+ return &m;
+ }
+
+#else
+ void lock()
+ {
+ boost::pthread::pthread_mutex_scoped_lock const local_lock(&m);
+ while(is_locked)
+ {
+ BOOST_VERIFY(!pthread_cond_wait(&cond,&m));
+ }
+ is_locked=true;
+ }
+
+ void unlock()
+ {
+ boost::pthread::pthread_mutex_scoped_lock const local_lock(&m);
+ is_locked=false;
+ BOOST_VERIFY(!pthread_cond_signal(&cond));
+ }
+
+ bool try_lock()
+ {
+ boost::pthread::pthread_mutex_scoped_lock const local_lock(&m);
+ if(is_locked)
+ {
+ return false;
+ }
+ is_locked=true;
+ return true;
+ }
+
+ bool timed_lock(system_time const & abs_time)
+ {
+ struct timespec const timeout=detail::get_timespec(abs_time);
+ boost::pthread::pthread_mutex_scoped_lock const local_lock(&m);
+ while(is_locked)
+ {
+ int const cond_res=pthread_cond_timedwait(&cond,&m,&timeout);
+ if(cond_res==ETIMEDOUT)
+ {
+ return false;
+ }
+ BOOST_ASSERT(!cond_res);
+ }
+ is_locked=true;
+ return true;
+ }
+#endif
+
+ typedef unique_lock<timed_mutex> scoped_timed_lock;
+ typedef detail::try_lock_wrapper<timed_mutex> scoped_try_lock;
+ typedef scoped_timed_lock scoped_lock;
+ };
+
+}
+
+#include <boost/config/abi_suffix.hpp>
+
+
+#endif