Mercurial > hg > vamp-build-and-test
diff DEPENDENCIES/generic/include/boost/interprocess/sync/posix/condition.hpp @ 16:2665513ce2d3
Add boost headers
author | Chris Cannam |
---|---|
date | Tue, 05 Aug 2014 11:11:38 +0100 |
parents | |
children | c530137014c0 |
line wrap: on
line diff
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/DEPENDENCIES/generic/include/boost/interprocess/sync/posix/condition.hpp Tue Aug 05 11:11:38 2014 +0100 @@ -0,0 +1,191 @@ +////////////////////////////////////////////////////////////////////////////// +// +// (C) Copyright Ion Gaztanaga 2005-2012. 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) +// +// See http://www.boost.org/libs/interprocess for documentation. +// +////////////////////////////////////////////////////////////////////////////// + +#ifndef BOOST_INTERPROCESS_POSIX_CONDITION_HPP +#define BOOST_INTERPROCESS_POSIX_CONDITION_HPP + +#if (defined _MSC_VER) && (_MSC_VER >= 1200) +# pragma once +#endif + +#include <boost/interprocess/detail/config_begin.hpp> +#include <boost/interprocess/detail/workaround.hpp> + +#include <pthread.h> +#include <errno.h> +#include <boost/interprocess/sync/posix/pthread_helpers.hpp> +#include <boost/interprocess/sync/posix/ptime_to_timespec.hpp> +#include <boost/interprocess/detail/posix_time_types_wrk.hpp> +#include <boost/interprocess/sync/posix/mutex.hpp> +#include <boost/assert.hpp> + +namespace boost { +namespace interprocess { +namespace ipcdetail { + +class posix_condition +{ + //Non-copyable + posix_condition(const posix_condition &); + posix_condition &operator=(const posix_condition &); + + public: + //!Constructs a posix_condition. On error throws interprocess_exception. + posix_condition(); + + //!Destroys *this + //!liberating system resources. + ~posix_condition(); + + //!If there is a thread waiting on *this, change that + //!thread's state to ready. Otherwise there is no effect. + void notify_one(); + + //!Change the state of all threads waiting on *this to ready. + //!If there are no waiting threads, notify_all() has no effect. + void notify_all(); + + //!Releases the lock on the posix_mutex object associated with lock, blocks + //!the current thread of execution until readied by a call to + //!this->notify_one() or this->notify_all(), and then reacquires the lock. + template <typename L> + void wait(L& lock) + { + if (!lock) + throw lock_exception(); + this->do_wait(*lock.mutex()); + } + + //!The same as: + //!while (!pred()) wait(lock) + template <typename L, typename Pr> + void wait(L& lock, Pr pred) + { + if (!lock) + throw lock_exception(); + + while (!pred()) + this->do_wait(*lock.mutex()); + } + + //!Releases the lock on the posix_mutex object associated with lock, blocks + //!the current thread of execution until readied by a call to + //!this->notify_one() or this->notify_all(), or until time abs_time is reached, + //!and then reacquires the lock. + //!Returns: false if time abs_time is reached, otherwise true. + template <typename L> + bool timed_wait(L& lock, const boost::posix_time::ptime &abs_time) + { + if(abs_time == boost::posix_time::pos_infin){ + this->wait(lock); + return true; + } + if (!lock) + throw lock_exception(); + return this->do_timed_wait(abs_time, *lock.mutex()); + } + + //!The same as: while (!pred()) { + //! if (!timed_wait(lock, abs_time)) return pred(); + //! } return true; + template <typename L, typename Pr> + bool timed_wait(L& lock, const boost::posix_time::ptime &abs_time, Pr pred) + { + if(abs_time == boost::posix_time::pos_infin){ + this->wait(lock, pred); + return true; + } + if (!lock) + throw lock_exception(); + while (!pred()){ + if (!this->do_timed_wait(abs_time, *lock.mutex())) + return pred(); + } + + return true; + } + + + void do_wait(posix_mutex &mut); + + bool do_timed_wait(const boost::posix_time::ptime &abs_time, posix_mutex &mut); + + private: + pthread_cond_t m_condition; +}; + +inline posix_condition::posix_condition() +{ + int res; + pthread_condattr_t cond_attr; + res = pthread_condattr_init(&cond_attr); + if(res != 0){ + throw interprocess_exception("pthread_condattr_init failed"); + } + res = pthread_condattr_setpshared(&cond_attr, PTHREAD_PROCESS_SHARED); + if(res != 0){ + pthread_condattr_destroy(&cond_attr); + throw interprocess_exception(res); + } + res = pthread_cond_init(&m_condition, &cond_attr); + pthread_condattr_destroy(&cond_attr); + if(res != 0){ + throw interprocess_exception(res); + } +} + +inline posix_condition::~posix_condition() +{ + int res = 0; + res = pthread_cond_destroy(&m_condition); + BOOST_ASSERT(res == 0); (void)res; +} + +inline void posix_condition::notify_one() +{ + int res = 0; + res = pthread_cond_signal(&m_condition); + BOOST_ASSERT(res == 0); (void)res; +} + +inline void posix_condition::notify_all() +{ + int res = 0; + res = pthread_cond_broadcast(&m_condition); + BOOST_ASSERT(res == 0); (void)res; +} + +inline void posix_condition::do_wait(posix_mutex &mut) +{ + pthread_mutex_t* pmutex = &mut.m_mut; + int res = 0; + res = pthread_cond_wait(&m_condition, pmutex); + BOOST_ASSERT(res == 0); (void)res; +} + +inline bool posix_condition::do_timed_wait + (const boost::posix_time::ptime &abs_time, posix_mutex &mut) +{ + timespec ts = ptime_to_timespec(abs_time); + pthread_mutex_t* pmutex = &mut.m_mut; + int res = 0; + res = pthread_cond_timedwait(&m_condition, pmutex, &ts); + BOOST_ASSERT(res == 0 || res == ETIMEDOUT); + + return res != ETIMEDOUT; +} + +} //namespace ipcdetail +} //namespace interprocess +} //namespace boost + +#include <boost/interprocess/detail/config_end.hpp> + +#endif //#ifndef BOOST_INTERPROCESS_POSIX_CONDITION_HPP