| ////////////////////////////////////////////////////////////////////////////// |
| // |
| // (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_SHM_NAMED_CONDITION_ANY_HPP |
| #define BOOST_INTERPROCESS_SHM_NAMED_CONDITION_ANY_HPP |
| |
| #ifndef BOOST_CONFIG_HPP |
| # include <boost/config.hpp> |
| #endif |
| # |
| #if defined(BOOST_HAS_PRAGMA_ONCE) |
| # pragma once |
| #endif |
| |
| #include <boost/interprocess/detail/config_begin.hpp> |
| #include <boost/interprocess/detail/workaround.hpp> |
| #include <boost/static_assert.hpp> |
| #include <boost/interprocess/detail/type_traits.hpp> |
| #include <boost/interprocess/creation_tags.hpp> |
| #include <boost/interprocess/exceptions.hpp> |
| #include <boost/interprocess/shared_memory_object.hpp> |
| #include <boost/interprocess/sync/interprocess_condition.hpp> |
| #include <boost/interprocess/detail/managed_open_or_create_impl.hpp> |
| #include <boost/interprocess/detail/posix_time_types_wrk.hpp> |
| #include <boost/interprocess/sync/shm/named_creation_functor.hpp> |
| #include <boost/interprocess/sync/named_mutex.hpp> |
| #include <boost/interprocess/permissions.hpp> |
| #include <boost/interprocess/sync/interprocess_mutex.hpp> |
| #include <boost/interprocess/sync/scoped_lock.hpp> |
| #include <boost/interprocess/sync/detail/condition_any_algorithm.hpp> |
| |
| //!\file |
| //!Describes process-shared variables interprocess_condition class |
| |
| namespace boost { |
| namespace interprocess { |
| namespace ipcdetail { |
| |
| #if !defined(BOOST_INTERPROCESS_DOXYGEN_INVOKED) |
| class interprocess_tester; |
| #endif //#ifndef BOOST_INTERPROCESS_DOXYGEN_INVOKED |
| |
| //! A global condition variable that can be created by name. |
| //! This condition variable is designed to work with named_mutex and |
| //! can't be placed in shared memory or memory mapped files. |
| class shm_named_condition_any |
| { |
| #if !defined(BOOST_INTERPROCESS_DOXYGEN_INVOKED) |
| //Non-copyable |
| shm_named_condition_any(); |
| shm_named_condition_any(const shm_named_condition_any &); |
| shm_named_condition_any &operator=(const shm_named_condition_any &); |
| #endif //#ifndef BOOST_INTERPROCESS_DOXYGEN_INVOKED |
| public: |
| //!Creates a global condition with a name. |
| //!If the condition can't be created throws interprocess_exception |
| shm_named_condition_any(create_only_t create_only, const char *name, const permissions &perm = permissions()) |
| : m_shmem (create_only |
| ,name |
| ,sizeof(internal_condition) + |
| open_create_impl_t::ManagedOpenOrCreateUserOffset |
| ,read_write |
| ,0 |
| ,construct_func_t(DoCreate) |
| ,perm) |
| {} |
| |
| //!Opens or creates a global condition with a name. |
| //!If the condition is created, this call is equivalent to |
| //!shm_named_condition_any(create_only_t, ... ) |
| //!If the condition is already created, this call is equivalent |
| //!shm_named_condition_any(open_only_t, ... ) |
| //!Does not throw |
| shm_named_condition_any(open_or_create_t open_or_create, const char *name, const permissions &perm = permissions()) |
| : m_shmem (open_or_create |
| ,name |
| ,sizeof(internal_condition) + |
| open_create_impl_t::ManagedOpenOrCreateUserOffset |
| ,read_write |
| ,0 |
| ,construct_func_t(DoOpenOrCreate) |
| ,perm) |
| {} |
| |
| //!Opens a global condition with a name if that condition is previously |
| //!created. If it is not previously created this function throws |
| //!interprocess_exception. |
| shm_named_condition_any(open_only_t open_only, const char *name) |
| : m_shmem (open_only |
| ,name |
| ,read_write |
| ,0 |
| ,construct_func_t(DoOpen)) |
| {} |
| |
| //!Destroys *this and indicates that the calling process is finished using |
| //!the resource. The destructor function will deallocate |
| //!any system resources allocated by the system for use by this process for |
| //!this resource. The resource can still be opened again calling |
| //!the open constructor overload. To erase the resource from the system |
| //!use remove(). |
| ~shm_named_condition_any() |
| {} |
| |
| //!If there is a thread waiting on *this, change that |
| //!thread's state to ready. Otherwise there is no effect.*/ |
| void notify_one() |
| { m_cond.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() |
| { m_cond.notify_all(); } |
| |
| //!Releases the lock on the named_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) |
| { m_cond.wait(lock); } |
| |
| //!The same as: |
| //!while (!pred()) wait(lock) |
| template <typename L, typename Pr> |
| void wait(L& lock, Pr pred) |
| { m_cond.wait(lock, pred); } |
| |
| //!Releases the lock on the named_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) |
| { return m_cond.timed_wait(lock, abs_time); } |
| |
| //!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) |
| { return m_cond.timed_wait(lock, abs_time, pred); } |
| |
| //!Erases a named condition from the system. |
| //!Returns false on error. Never throws. |
| static bool remove(const char *name) |
| { return shared_memory_object::remove(name); } |
| |
| #if !defined(BOOST_INTERPROCESS_DOXYGEN_INVOKED) |
| private: |
| |
| class internal_condition_members |
| { |
| public: |
| typedef interprocess_mutex mutex_type; |
| typedef interprocess_condition condvar_type; |
| |
| condvar_type& get_condvar() { return m_cond; } |
| mutex_type& get_mutex() { return m_mtx; } |
| |
| private: |
| mutex_type m_mtx; |
| condvar_type m_cond; |
| }; |
| |
| typedef ipcdetail::condition_any_wrapper<internal_condition_members> internal_condition; |
| |
| internal_condition m_cond; |
| |
| friend class boost::interprocess::ipcdetail::interprocess_tester; |
| void dont_close_on_destruction() |
| { interprocess_tester::dont_close_on_destruction(m_shmem); } |
| |
| typedef ipcdetail::managed_open_or_create_impl<shared_memory_object, 0, true, false> open_create_impl_t; |
| open_create_impl_t m_shmem; |
| |
| template <class T, class Arg> friend class boost::interprocess::ipcdetail::named_creation_functor; |
| typedef boost::interprocess::ipcdetail::named_creation_functor<internal_condition> construct_func_t; |
| #endif //#ifndef BOOST_INTERPROCESS_DOXYGEN_INVOKED |
| }; |
| |
| } //namespace ipcdetail |
| } //namespace interprocess |
| } //namespace boost |
| |
| #include <boost/interprocess/detail/config_end.hpp> |
| |
| #endif // BOOST_INTERPROCESS_SHM_NAMED_CONDITION_ANY_HPP |