/src/contrib/boost/thread/pthread/mutex.hpp
http://pythonocc.googlecode.com/ · C++ Header · 211 lines · 182 code · 25 blank · 4 comment · 10 complexity · 852b479f168265679655b3b7b630ad8e MD5 · raw file
- #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:
- boost::noncopyable
- {
- private:
- 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()
- {
- 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)
- {
- 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