sync/posix/named_semaphore.hpp

0001 //////////////////////////////////////////////////////////////////////////////
0002 //
0003 // (C) Copyright Ion Gaztanaga 2005-2012. Distributed under the Boost
0004 // Software License, Version 1.0. (See accompanying file
0005 // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
0006 //
0007 // See http://www.boost.org/libs/interprocess for documentation.
0008 //
0009 //////////////////////////////////////////////////////////////////////////////
0010
0011 #ifndef BOOST_INTERPROCESS_POSIX_NAMED_CONDITION_HPP
0012 #define BOOST_INTERPROCESS_POSIX_NAMED_CONDITION_HPP
0013
0014 #ifndef BOOST_CONFIG_HPP
0015 #  include <boost/config.hpp>
0016 #endif
0017 #
0018 #if defined(BOOST_HAS_PRAGMA_ONCE)
0019 #  pragma once
0020 #endif
0021
0022 #include <boost/interprocess/detail/config_begin.hpp>
0023 #include <boost/interprocess/detail/workaround.hpp>
0024
0025 #include <boost/interprocess/sync/posix/semaphore_wrapper.hpp>
0026
0027 namespace boost {
0028 namespace interprocess {
0029
0030 #if !defined(BOOST_INTERPROCESS_DOXYGEN_INVOKED)
0031 namespace ipcdetail{ class interprocess_tester; }
0032 #endif   //#ifndef BOOST_INTERPROCESS_DOXYGEN_INVOKED
0033
0034 namespace ipcdetail {
0035
0036 class posix_named_semaphore
0037 {
0038    posix_named_semaphore();
0039    posix_named_semaphore(const posix_named_semaphore&);
0040    posix_named_semaphore &operator= (const posix_named_semaphore &);
0041
0042    public:
0043    posix_named_semaphore
0044       (create_only_t, const char *name, unsigned int initialCount, const permissions &perm = permissions())
0045    {  semaphore_open(mp_sem, DoCreate, name, initialCount, perm);   }
0046
0047    posix_named_semaphore(open_or_create_t, const char *name, unsigned int initialCount, const permissions &perm = permissions())
0048    {  semaphore_open(mp_sem, DoOpenOrCreate, name, initialCount, perm);   }
0049
0050    posix_named_semaphore(open_only_t, const char *name)
0051    {  semaphore_open(mp_sem, DoOpen, name);   }
0052
0053    ~posix_named_semaphore()
0054    {
0055       if(mp_sem != BOOST_INTERPROCESS_POSIX_SEM_FAILED)
0056          semaphore_close(mp_sem);
0057    }
0058
0059    void post()
0060    {  semaphore_post(mp_sem); }
0061
0062    void wait()
0063    {  semaphore_wait(mp_sem); }
0064
0065    bool try_wait()
0066    {  return semaphore_try_wait(mp_sem); }
0067
0068    template<class TimePoint>
0069    bool timed_wait(const TimePoint &abs_time)
0070    {  return semaphore_timed_wait(mp_sem, abs_time); }
0071
0072    static bool remove(const char *name)
0073    {  return semaphore_unlink(name);   }
0074
0075    private:
0076    friend class ipcdetail::interprocess_tester;
0077    void dont_close_on_destruction()
0078    {  mp_sem = BOOST_INTERPROCESS_POSIX_SEM_FAILED; }
0079
0080    sem_t      *mp_sem;
0081 };
0082
0083 }  //namespace ipcdetail {
0084 }  //namespace interprocess {
0085 }  //namespace boost {
0086
0087 #include <boost/interprocess/detail/config_end.hpp>
0088
0089 #endif   //#ifndef BOOST_INTERPROCESS_POSIX_NAMED_CONDITION_HPP