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+//////////////////////////////////////////////////////////////////////////////
+//
+// (C) Copyright Ion Gaztanaga 2005-2011. 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);
+}
+
+inline void posix_condition::notify_one()
+{
+ int res = 0;
+ res = pthread_cond_signal(&m_condition);
+ BOOST_ASSERT(res == 0);
+}
+
+inline void posix_condition::notify_all()
+{
+ int res = 0;
+ res = pthread_cond_broadcast(&m_condition);
+ BOOST_ASSERT(res == 0);
+}
+
+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);
+}
+
+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