#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/throw_exception.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 | |
{ | |
private: | |
mutex(mutex const&); | |
mutex& operator=(mutex const&); | |
pthread_mutex_t m; | |
public: | |
mutex() | |
{ | |
int const res=pthread_mutex_init(&m,NULL); | |
if(res) | |
{ | |
boost::throw_exception(thread_resource_error()); | |
} | |
} | |
~mutex() | |
{ | |
BOOST_VERIFY(!pthread_mutex_destroy(&m)); | |
} | |
void lock() | |
{ | |
int const res=pthread_mutex_lock(&m); | |
if(res) | |
{ | |
boost::throw_exception(lock_error(res)); | |
} | |
} | |
void unlock() | |
{ | |
BOOST_VERIFY(!pthread_mutex_unlock(&m)); | |
} | |
bool try_lock() | |
{ | |
int const res=pthread_mutex_trylock(&m); | |
if(res && (res!=EBUSY)) | |
{ | |
boost::throw_exception(lock_error(res)); | |
} | |
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 | |
{ | |
private: | |
timed_mutex(timed_mutex const&); | |
timed_mutex& operator=(timed_mutex const&); | |
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) | |
{ | |
boost::throw_exception(thread_resource_error()); | |
} | |
#ifndef BOOST_PTHREAD_HAS_TIMEDLOCK | |
int const res2=pthread_cond_init(&cond,NULL); | |
if(res2) | |
{ | |
BOOST_VERIFY(!pthread_mutex_destroy(&m)); | |
boost::throw_exception(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 |