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//  -*- C++ -*-
 
// Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
// Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library.  This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
 
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
 
// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.
 
// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
// .
 
/** @file mutex
 *  This is a Standard C++ Library header.
 */
 
#ifndef _GLIBCXX_MUTEX
#define _GLIBCXX_MUTEX 1
 
#pragma GCC system_header
 
#ifndef __GXX_EXPERIMENTAL_CXX0X__
# include 
#else
 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include  // for std::swap
 
#if defined(_GLIBCXX_HAS_GTHREADS) && defined(_GLIBCXX_USE_C99_STDINT_TR1)
 
namespace std
{
  /**
   * @defgroup mutexes Mutexes
   * @ingroup concurrency
   *
   * Classes for mutex support.
   * @{
   */
 
  /// mutex
  class mutex
  {
    typedef __gthread_mutex_t                   __native_type;
    __native_type  _M_mutex;
 
  public:
    typedef __native_type*                      native_handle_type;
 
    mutex()
    {
      // XXX EAGAIN, ENOMEM, EPERM, EBUSY(may), EINVAL(may)
#ifdef __GTHREAD_MUTEX_INIT
      __native_type __tmp = __GTHREAD_MUTEX_INIT;
      _M_mutex = __tmp;
#else
      __GTHREAD_MUTEX_INIT_FUNCTION(&_M_mutex);
#endif
    }
 
    mutex(const mutex&) = delete;
    mutex& operator=(const mutex&) = delete;
 
    void
    lock()
    {
      int __e = __gthread_mutex_lock(&_M_mutex);
 
      // EINVAL, EAGAIN, EBUSY, EINVAL, EDEADLK(may)
      if (__e)
        __throw_system_error(__e);
    }
 
    bool
    try_lock()
    {
      // XXX EINVAL, EAGAIN, EBUSY
      return !__gthread_mutex_trylock(&_M_mutex);
    }
 
    void
    unlock()
    {
      // XXX EINVAL, EAGAIN, EPERM
      __gthread_mutex_unlock(&_M_mutex);
    }
 
    native_handle_type
    native_handle()
    { return &_M_mutex; }
  };
 
  /// recursive_mutex
  class recursive_mutex
  {
    typedef __gthread_recursive_mutex_t         __native_type;
    __native_type  _M_mutex;
 
  public:
    typedef __native_type*                      native_handle_type;
 
    recursive_mutex()
    {
      // XXX EAGAIN, ENOMEM, EPERM, EBUSY(may), EINVAL(may)
#ifdef __GTHREAD_RECURSIVE_MUTEX_INIT
      __native_type __tmp = __GTHREAD_RECURSIVE_MUTEX_INIT;
      _M_mutex = __tmp;
#else
      __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION(&_M_mutex);
#endif
    }
 
    recursive_mutex(const recursive_mutex&) = delete;
    recursive_mutex& operator=(const recursive_mutex&) = delete;
 
    void
    lock()
    {
      int __e = __gthread_recursive_mutex_lock(&_M_mutex);
 
      // EINVAL, EAGAIN, EBUSY, EINVAL, EDEADLK(may)
      if (__e)
        __throw_system_error(__e);
    }
 
    bool
    try_lock()
    {
      // XXX EINVAL, EAGAIN, EBUSY
      return !__gthread_recursive_mutex_trylock(&_M_mutex);
    }
 
    void
    unlock()
    {
      // XXX EINVAL, EAGAIN, EBUSY
      __gthread_recursive_mutex_unlock(&_M_mutex);
    }
 
    native_handle_type
    native_handle()
    { return &_M_mutex; }
  };
 
  /// timed_mutex
  class timed_mutex
  {
    typedef __gthread_mutex_t                   __native_type;
 
#ifdef _GLIBCXX_USE_CLOCK_MONOTONIC
    typedef chrono::monotonic_clock             __clock_t;
#else
    typedef chrono::high_resolution_clock       __clock_t;
#endif
 
    __native_type  _M_mutex;
 
  public:
    typedef __native_type*                      native_handle_type;
 
    timed_mutex()
    {
#ifdef __GTHREAD_MUTEX_INIT
      __native_type __tmp = __GTHREAD_MUTEX_INIT;
      _M_mutex = __tmp;
#else
      __GTHREAD_MUTEX_INIT_FUNCTION(&_M_mutex);
#endif
    }
 
    timed_mutex(const timed_mutex&) = delete;
    timed_mutex& operator=(const timed_mutex&) = delete;
 
    void
    lock()
    {
      int __e = __gthread_mutex_lock(&_M_mutex);
 
      // EINVAL, EAGAIN, EBUSY, EINVAL, EDEADLK(may)
      if (__e)
        __throw_system_error(__e);
    }
 
    bool
    try_lock()
    {
      // XXX EINVAL, EAGAIN, EBUSY
      return !__gthread_mutex_trylock(&_M_mutex);
    }
 
    template 
      bool
      try_lock_for(const chrono::duration<_Rep, _Period>& __rtime)
      { return __try_lock_for_impl(__rtime); }
 
    template 
      bool
      try_lock_until(const chrono::time_point<_Clock, _Duration>& __atime)
      {
        chrono::time_point<_Clock, chrono::seconds> __s =
          chrono::time_point_cast(__atime);
 
        chrono::nanoseconds __ns =
          chrono::duration_cast(__atime - __s);
 
        __gthread_time_t __ts = {
          static_cast(__s.time_since_epoch().count()),
          static_cast(__ns.count())
        };
 
        return !__gthread_mutex_timedlock(&_M_mutex, &__ts);
      }
 
    void
    unlock()
    {
      // XXX EINVAL, EAGAIN, EBUSY
      __gthread_mutex_unlock(&_M_mutex);
    }
 
    native_handle_type
    native_handle()
    { return &_M_mutex; }
 
  private:
    template
      typename enable_if<
        ratio_less_equal<__clock_t::period, _Period>::value, bool>::type
      __try_lock_for_impl(const chrono::duration<_Rep, _Period>& __rtime)
      {
        __clock_t::time_point __atime = __clock_t::now()
          + chrono::duration_cast<__clock_t::duration>(__rtime);
 
        return try_lock_until(__atime);
      }
 
    template 
      typename enable_if<
        !ratio_less_equal<__clock_t::period, _Period>::value, bool>::type
      __try_lock_for_impl(const chrono::duration<_Rep, _Period>& __rtime)
      {
        __clock_t::time_point __atime = __clock_t::now()
          + ++chrono::duration_cast<__clock_t::duration>(__rtime);
 
        return try_lock_until(__atime);
      }
  };
 
  /// recursive_timed_mutex
  class recursive_timed_mutex
  {
    typedef __gthread_recursive_mutex_t         __native_type;
 
#ifdef _GLIBCXX_USE_CLOCK_MONOTONIC
    typedef chrono::monotonic_clock             __clock_t;
#else
    typedef chrono::high_resolution_clock       __clock_t;
#endif
 
    __native_type  _M_mutex;
 
  public:
    typedef __native_type*                      native_handle_type;
 
    recursive_timed_mutex()
    {
      // XXX EAGAIN, ENOMEM, EPERM, EBUSY(may), EINVAL(may)
#ifdef __GTHREAD_RECURSIVE_MUTEX_INIT
      __native_type __tmp = __GTHREAD_RECURSIVE_MUTEX_INIT;
      _M_mutex = __tmp;
#else
      __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION(&_M_mutex);
#endif
    }
 
    recursive_timed_mutex(const recursive_timed_mutex&) = delete;
    recursive_timed_mutex& operator=(const recursive_timed_mutex&) = delete;
 
    void
    lock()
    {
      int __e = __gthread_recursive_mutex_lock(&_M_mutex);
 
      // EINVAL, EAGAIN, EBUSY, EINVAL, EDEADLK(may)
      if (__e)
        __throw_system_error(__e);
    }
 
    bool
    try_lock()
    {
      // XXX EINVAL, EAGAIN, EBUSY
      return !__gthread_recursive_mutex_trylock(&_M_mutex);
    }
 
    template 
      bool
      try_lock_for(const chrono::duration<_Rep, _Period>& __rtime)
      { return __try_lock_for_impl(__rtime); }
 
    template 
      bool
      try_lock_until(const chrono::time_point<_Clock, _Duration>& __atime)
      {
        chrono::time_point<_Clock, chrono::seconds>  __s =
          chrono::time_point_cast(__atime);
 
        chrono::nanoseconds __ns =
          chrono::duration_cast(__atime - __s);
 
        __gthread_time_t __ts = {
          static_cast(__s.time_since_epoch().count()),
          static_cast(__ns.count())
        };
 
        return !__gthread_recursive_mutex_timedlock(&_M_mutex, &__ts);
      }
 
    void
    unlock()
    {
      // XXX EINVAL, EAGAIN, EBUSY
      __gthread_recursive_mutex_unlock(&_M_mutex);
    }
 
    native_handle_type
    native_handle()
    { return &_M_mutex; }
 
  private:
    template
      typename enable_if<
        ratio_less_equal<__clock_t::period, _Period>::value, bool>::type
      __try_lock_for_impl(const chrono::duration<_Rep, _Period>& __rtime)
      {
        __clock_t::time_point __atime = __clock_t::now()
          + chrono::duration_cast<__clock_t::duration>(__rtime);
 
        return try_lock_until(__atime);
      }
 
    template 
      typename enable_if<
        !ratio_less_equal<__clock_t::period, _Period>::value, bool>::type
      __try_lock_for_impl(const chrono::duration<_Rep, _Period>& __rtime)
      {
        __clock_t::time_point __atime = __clock_t::now()
          + ++chrono::duration_cast<__clock_t::duration>(__rtime);
 
        return try_lock_until(__atime);
      }
  };
 
  /// Do not acquire ownership of the mutex.
  struct defer_lock_t { };
 
  /// Try to acquire ownership of the mutex without blocking.
  struct try_to_lock_t { };
 
  /// Assume the calling thread has already obtained mutex ownership
  /// and manage it.
  struct adopt_lock_t { };
 
  extern const defer_lock_t     defer_lock;
  extern const try_to_lock_t    try_to_lock;
  extern const adopt_lock_t     adopt_lock;
 
  /// @brief  Scoped lock idiom.
  // Acquire the mutex here with a constructor call, then release with
  // the destructor call in accordance with RAII style.
  template
    class lock_guard
    {
    public:
      typedef _Mutex mutex_type;
 
      explicit lock_guard(mutex_type& __m) : _M_device(__m)
      { _M_device.lock(); }
 
      lock_guard(mutex_type& __m, adopt_lock_t) : _M_device(__m)
      { } // calling thread owns mutex
 
      ~lock_guard()
      { _M_device.unlock(); }
 
      lock_guard(const lock_guard&) = delete;
      lock_guard& operator=(const lock_guard&) = delete;
 
    private:
      mutex_type&  _M_device;
    };
 
  /// unique_lock
  template
    class unique_lock
    {
    public:
      typedef _Mutex mutex_type;
 
      unique_lock()
      : _M_device(0), _M_owns(false)
      { }
 
      explicit unique_lock(mutex_type& __m)
      : _M_device(&__m), _M_owns(false)
      {
        lock();
        _M_owns = true;
      }
 
      unique_lock(mutex_type& __m, defer_lock_t)
      : _M_device(&__m), _M_owns(false)
      { }
 
      unique_lock(mutex_type& __m, try_to_lock_t)
      : _M_device(&__m), _M_owns(_M_device->try_lock())
      { }
 
      unique_lock(mutex_type& __m, adopt_lock_t)
      : _M_device(&__m), _M_owns(true)
      {
        // XXX calling thread owns mutex
      }
 
      template
        unique_lock(mutex_type& __m,
                    const chrono::time_point<_Clock, _Duration>& __atime)
        : _M_device(&__m), _M_owns(_M_device->try_lock_until(__atime))
        { }
 
      template
        unique_lock(mutex_type& __m,
                    const chrono::duration<_Rep, _Period>& __rtime)
        : _M_device(&__m), _M_owns(_M_device->try_lock_for(__rtime))
        { }
 
      ~unique_lock()
      {
        if (_M_owns)
          unlock();
      }
 
      unique_lock(const unique_lock&) = delete;
      unique_lock& operator=(const unique_lock&) = delete;
 
      unique_lock(unique_lock&& __u)
      : _M_device(__u._M_device), _M_owns(__u._M_owns)
      {
        __u._M_device = 0;
        __u._M_owns = false;
      }
 
      unique_lock& operator=(unique_lock&& __u)
      {
        if(_M_owns)
          unlock();
 
        unique_lock(std::move(__u)).swap(*this);
 
        __u._M_device = 0;
        __u._M_owns = false;
 
        return *this;
      }
 
      void
      lock()
      {
        if (!_M_device)
          __throw_system_error(int(errc::operation_not_permitted));
        else if (_M_owns)
          __throw_system_error(int(errc::resource_deadlock_would_occur));
        else
          {
            _M_device->lock();
            _M_owns = true;
          }
      }
 
      bool
      try_lock()
      {
        if (!_M_device)
          __throw_system_error(int(errc::operation_not_permitted));
        else if (_M_owns)
          __throw_system_error(int(errc::resource_deadlock_would_occur));
        else
          {
            _M_owns = _M_device->try_lock();
            return _M_owns;
          }
      }
 
      template
        bool
        try_lock_until(const chrono::time_point<_Clock, _Duration>& __atime)
        {
          if (!_M_device)
            __throw_system_error(int(errc::operation_not_permitted));
          else if (_M_owns)
            __throw_system_error(int(errc::resource_deadlock_would_occur));
          else
            {
              _M_owns = _M_device->try_lock_until(__atime);
              return _M_owns;
            }
        }
 
      template
        bool
        try_lock_for(const chrono::duration<_Rep, _Period>& __rtime)
        {
          if (!_M_device)
            __throw_system_error(int(errc::operation_not_permitted));
          else if (_M_owns)
            __throw_system_error(int(errc::resource_deadlock_would_occur));
          else
            {
              _M_owns = _M_device->try_lock_for(__rtime);
              return _M_owns;
            }
         }
 
      void
      unlock()
      {
        if (!_M_owns)
          __throw_system_error(int(errc::operation_not_permitted));
        else if (_M_device)
          {
            _M_device->unlock();
            _M_owns = false;
          }
      }
 
      void
      swap(unique_lock& __u)
      {
        std::swap(_M_device, __u._M_device);
        std::swap(_M_owns, __u._M_owns);
      }
 
      mutex_type*
      release()
      {
        mutex_type* __ret = _M_device;
        _M_device = 0;
        _M_owns = false;
        return __ret;
      }
 
      bool
      owns_lock() const
      { return _M_owns; }
 
      explicit operator bool() const
      { return owns_lock(); }
 
      mutex_type*
      mutex() const
      { return _M_device; }
 
    private:
      mutex_type*       _M_device;
      bool              _M_owns; // XXX use atomic_bool
    };
 
  template
    inline void
    swap(unique_lock<_Mutex>& __x, unique_lock<_Mutex>& __y)
    { __x.swap(__y); }
 
  template
    struct __unlock_impl
    {
      template
        static void
        __do_unlock(tuple<_Lock&...>& __locks)
        {
          std::get<_Idx>(__locks).unlock();
          __unlock_impl<_Idx - 1>::__do_unlock(__locks);
        }
    };
 
  template<>
    struct __unlock_impl<-1>
    {
      template
        static void
        __do_unlock(tuple<_Lock&...>&)
        { }
    };
 
  template
    struct __try_lock_impl
    {
      template
        static int
        __do_try_lock(tuple<_Lock&...>& __locks)
        {
          if(std::get<_Idx>(__locks).try_lock())
            {
              return __try_lock_impl<_Idx + 1,
                _Idx + 2 < sizeof...(_Lock)>::__do_try_lock(__locks);
            }
          else
            {
              __unlock_impl<_Idx>::__do_unlock(__locks);
              return _Idx;
            }
        }
    };
 
  template
    struct __try_lock_impl<_Idx, false>
    {
      template
        static int
        __do_try_lock(tuple<_Lock&...>& __locks)
        {
          if(std::get<_Idx>(__locks).try_lock())
            return -1;
          else
            {
              __unlock_impl<_Idx>::__do_unlock(__locks);
              return _Idx;
            }
        }
    };
 
  /** @brief Generic try_lock.
   *  @param __l1 Meets Mutex requirements (try_lock() may throw).
   *  @param __l2 Meets Mutex requirements (try_lock() may throw).
   *  @param __l3 Meets Mutex requirements (try_lock() may throw).
   *  @return Returns -1 if all try_lock() calls return true. Otherwise returns
   *          a 0-based index corresponding to the argument that returned false.
   *  @post Either all arguments are locked, or none will be.
   *
   *  Sequentially calls try_lock() on each argument.
   */
  template
    int
    try_lock(_Lock1& __l1, _Lock2& __l2, _Lock3&... __l3)
    {
      tuple<_Lock1&, _Lock2&, _Lock3&...> __locks(__l1, __l2, __l3...);
      return __try_lock_impl<0>::__do_try_lock(__locks);
    }
 
  /// lock
  template
    void
    lock(_L1&, _L2&, _L3&...);
 
  /// once_flag
  struct once_flag
  {
  private:
    typedef __gthread_once_t __native_type;
    __native_type  _M_once;
 
  public:
    once_flag()
    {
      __native_type __tmp = __GTHREAD_ONCE_INIT;
      _M_once = __tmp;
    }
 
    once_flag(const once_flag&) = delete;
    once_flag& operator=(const once_flag&) = delete;
 
    template
      friend void
      call_once(once_flag& __once, _Callable __f, _Args&&... __args);
  };
 
#ifdef _GLIBCXX_HAVE_TLS
  extern __thread void* __once_callable;
  extern __thread void (*__once_call)();
 
  template
    inline void
    __once_call_impl()
    {
      (*(_Callable*)__once_callable)();
    }
#else
  extern function __once_functor;
 
  extern void
  __set_once_functor_lock_ptr(unique_lock*);
 
  extern mutex&
  __get_once_mutex();
#endif
 
  extern "C" void __once_proxy();
 
  /// call_once
  template
    void
    call_once(once_flag& __once, _Callable __f, _Args&&... __args)
    {
#ifdef _GLIBCXX_HAVE_TLS
      auto __bound_functor = std::bind(__f, __args...);
      __once_callable = &__bound_functor;
      __once_call = &__once_call_impl;
#else
      unique_lock __functor_lock(__get_once_mutex());
      __once_functor = std::bind(__f, __args...);
      __set_once_functor_lock_ptr(&__functor_lock);
#endif
 
      int __e = __gthread_once(&(__once._M_once), &__once_proxy);
 
#ifndef _GLIBCXX_HAVE_TLS
      if (__functor_lock)
        __set_once_functor_lock_ptr(0);
#endif
 
      if (__e)
        __throw_system_error(__e);
    }
 
  // @} group mutexes
}
 
#endif // _GLIBCXX_HAS_GTHREADS && _GLIBCXX_USE_C99_STDINT_TR1
 
#endif // __GXX_EXPERIMENTAL_CXX0X__
 
#endif // _GLIBCXX_MUTEX

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[/] [openrisc/] [trunk/] [gnu-stable/] [gcc-4.5.1/] [libstdc++-v3/] [include/] [std/] [mutex] - Blame information for rev 424

Line No.	Rev	Author	Line
1	424	jeremybenn	`// -- C++ --`
2
3			`// Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010`
4			`// Free Software Foundation, Inc.`
5			`//`
6			`// This file is part of the GNU ISO C++ Library. This library is free`
7			`// software; you can redistribute it and/or modify it under the`
8			`// terms of the GNU General Public License as published by the`
9			`// Free Software Foundation; either version 3, or (at your option)`
10			`// any later version.`
11
12			`// This library is distributed in the hope that it will be useful,`
13			`// but WITHOUT ANY WARRANTY; without even the implied warranty of`
14			`// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the`
15			`// GNU General Public License for more details.`
16
17			`// Under Section 7 of GPL version 3, you are granted additional`
18			`// permissions described in the GCC Runtime Library Exception, version`
19			`// 3.1, as published by the Free Software Foundation.`
20
21			`// You should have received a copy of the GNU General Public License and`
22			`// a copy of the GCC Runtime Library Exception along with this program;`
23			`// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see`
24			`// .`
25
26			`/** @file mutex`
27			`* This is a Standard C++ Library header.`
28			`*/`
29
30			`#ifndef _GLIBCXX_MUTEX`
31			`#define _GLIBCXX_MUTEX 1`
32
33			`#pragma GCC system_header`
34
35			`#ifndef __GXX_EXPERIMENTAL_CXX0X__`
36			`# include`
37			`#else`
38
39			`#include`
40			`#include`
41			`#include`
42			`#include`
43			`#include`
44			`#include`
45			`#include`
46			`#include`
47			`#include`
48			`#include // for std::swap`
49
50			`#if defined(_GLIBCXX_HAS_GTHREADS) && defined(_GLIBCXX_USE_C99_STDINT_TR1)`
51
52			`namespace std`
53			`{`
54			`/**`
55			`* @defgroup mutexes Mutexes`
56			`* @ingroup concurrency`
57			`*`
58			`* Classes for mutex support.`
59			`* @{`
60			`*/`
61
62			`/// mutex`
63			`class mutex`
64			`{`
65			`typedef __gthread_mutex_t __native_type;`
66			`__native_type _M_mutex;`
67
68			`public:`
69			`typedef __native_type* native_handle_type;`
70
71			`mutex()`
72			`{`
73			`// XXX EAGAIN, ENOMEM, EPERM, EBUSY(may), EINVAL(may)`
74			`#ifdef __GTHREAD_MUTEX_INIT`
75			`__native_type __tmp = __GTHREAD_MUTEX_INIT;`
76			`_M_mutex = __tmp;`
77			`#else`
78			`__GTHREAD_MUTEX_INIT_FUNCTION(&_M_mutex);`
79			`#endif`
80			`}`
81
82			`mutex(const mutex&) = delete;`
83			`mutex& operator=(const mutex&) = delete;`
84
85			`void`
86			`lock()`
87			`{`
88			`int __e = __gthread_mutex_lock(&_M_mutex);`
89
90			`// EINVAL, EAGAIN, EBUSY, EINVAL, EDEADLK(may)`
91			`if (__e)`
92			`__throw_system_error(__e);`
93			`}`
94
95			`bool`
96			`try_lock()`
97			`{`
98			`// XXX EINVAL, EAGAIN, EBUSY`
99			`return !__gthread_mutex_trylock(&_M_mutex);`
100			`}`
101
102			`void`
103			`unlock()`
104			`{`
105			`// XXX EINVAL, EAGAIN, EPERM`
106			`__gthread_mutex_unlock(&_M_mutex);`
107			`}`
108
109			`native_handle_type`
110			`native_handle()`
111			`{ return &_M_mutex; }`
112			`};`
113
114			`/// recursive_mutex`
115			`class recursive_mutex`
116			`{`
117			`typedef __gthread_recursive_mutex_t __native_type;`
118			`__native_type _M_mutex;`
119
120			`public:`
121			`typedef __native_type* native_handle_type;`
122
123			`recursive_mutex()`
124			`{`
125			`// XXX EAGAIN, ENOMEM, EPERM, EBUSY(may), EINVAL(may)`
126			`#ifdef __GTHREAD_RECURSIVE_MUTEX_INIT`
127			`__native_type __tmp = __GTHREAD_RECURSIVE_MUTEX_INIT;`
128			`_M_mutex = __tmp;`
129			`#else`
130			`__GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION(&_M_mutex);`
131			`#endif`
132			`}`
133
134			`recursive_mutex(const recursive_mutex&) = delete;`
135			`recursive_mutex& operator=(const recursive_mutex&) = delete;`
136
137			`void`
138			`lock()`
139			`{`
140			`int __e = __gthread_recursive_mutex_lock(&_M_mutex);`
141
142			`// EINVAL, EAGAIN, EBUSY, EINVAL, EDEADLK(may)`
143			`if (__e)`
144			`__throw_system_error(__e);`
145			`}`
146
147			`bool`
148			`try_lock()`
149			`{`
150			`// XXX EINVAL, EAGAIN, EBUSY`
151			`return !__gthread_recursive_mutex_trylock(&_M_mutex);`
152			`}`
153
154			`void`
155			`unlock()`
156			`{`
157			`// XXX EINVAL, EAGAIN, EBUSY`
158			`__gthread_recursive_mutex_unlock(&_M_mutex);`
159			`}`
160
161			`native_handle_type`
162			`native_handle()`
163			`{ return &_M_mutex; }`
164			`};`
165
166			`/// timed_mutex`
167			`class timed_mutex`
168			`{`
169			`typedef __gthread_mutex_t __native_type;`
170
171			`#ifdef _GLIBCXX_USE_CLOCK_MONOTONIC`
172			`typedef chrono::monotonic_clock __clock_t;`
173			`#else`
174			`typedef chrono::high_resolution_clock __clock_t;`
175			`#endif`
176
177			`__native_type _M_mutex;`
178
179			`public:`
180			`typedef __native_type* native_handle_type;`
181
182			`timed_mutex()`
183			`{`
184			`#ifdef __GTHREAD_MUTEX_INIT`
185			`__native_type __tmp = __GTHREAD_MUTEX_INIT;`
186			`_M_mutex = __tmp;`
187			`#else`
188			`__GTHREAD_MUTEX_INIT_FUNCTION(&_M_mutex);`
189			`#endif`
190			`}`
191
192			`timed_mutex(const timed_mutex&) = delete;`
193			`timed_mutex& operator=(const timed_mutex&) = delete;`
194
195			`void`
196			`lock()`
197			`{`
198			`int __e = __gthread_mutex_lock(&_M_mutex);`
199
200			`// EINVAL, EAGAIN, EBUSY, EINVAL, EDEADLK(may)`
201			`if (__e)`
202			`__throw_system_error(__e);`
203			`}`
204
205			`bool`
206			`try_lock()`
207			`{`
208			`// XXX EINVAL, EAGAIN, EBUSY`
209			`return !__gthread_mutex_trylock(&_M_mutex);`
210			`}`
211
212			`template`
213			`bool`
214			`try_lock_for(const chrono::duration<_Rep, _Period>& __rtime)`
215			`{ return __try_lock_for_impl(__rtime); }`
216
217			`template`
218			`bool`
219			`try_lock_until(const chrono::time_point<_Clock, _Duration>& __atime)`
220			`{`
221			`chrono::time_point<_Clock, chrono::seconds> __s =`
222			`chrono::time_point_cast(__atime);`
223
224			`chrono::nanoseconds __ns =`
225			`chrono::duration_cast(__atime - __s);`
226
227			`__gthread_time_t __ts = {`
228			`static_cast(__s.time_since_epoch().count()),`
229			`static_cast(__ns.count())`
230			`};`
231
232			`return !__gthread_mutex_timedlock(&_M_mutex, &__ts);`
233			`}`
234
235			`void`
236			`unlock()`
237			`{`
238			`// XXX EINVAL, EAGAIN, EBUSY`
239			`__gthread_mutex_unlock(&_M_mutex);`
240			`}`
241
242			`native_handle_type`
243			`native_handle()`
244			`{ return &_M_mutex; }`
245
246			`private:`
247			`template`
248			`typename enable_if<`
249			`ratio_less_equal<__clock_t::period, _Period>::value, bool>::type`
250			`__try_lock_for_impl(const chrono::duration<_Rep, _Period>& __rtime)`
251			`{`
252			`__clock_t::time_point __atime = __clock_t::now()`
253			`+ chrono::duration_cast<__clock_t::duration>(__rtime);`
254
255			`return try_lock_until(__atime);`
256			`}`
257
258			`template`
259			`typename enable_if<`
260			`!ratio_less_equal<__clock_t::period, _Period>::value, bool>::type`
261			`__try_lock_for_impl(const chrono::duration<_Rep, _Period>& __rtime)`
262			`{`
263			`__clock_t::time_point __atime = __clock_t::now()`
264			`+ ++chrono::duration_cast<__clock_t::duration>(__rtime);`
265
266			`return try_lock_until(__atime);`
267			`}`
268			`};`
269
270			`/// recursive_timed_mutex`
271			`class recursive_timed_mutex`
272			`{`
273			`typedef __gthread_recursive_mutex_t __native_type;`
274
275			`#ifdef _GLIBCXX_USE_CLOCK_MONOTONIC`
276			`typedef chrono::monotonic_clock __clock_t;`
277			`#else`
278			`typedef chrono::high_resolution_clock __clock_t;`
279			`#endif`
280
281			`__native_type _M_mutex;`
282
283			`public:`
284			`typedef __native_type* native_handle_type;`
285
286			`recursive_timed_mutex()`
287			`{`
288			`// XXX EAGAIN, ENOMEM, EPERM, EBUSY(may), EINVAL(may)`
289			`#ifdef __GTHREAD_RECURSIVE_MUTEX_INIT`
290			`__native_type __tmp = __GTHREAD_RECURSIVE_MUTEX_INIT;`
291			`_M_mutex = __tmp;`
292			`#else`
293			`__GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION(&_M_mutex);`
294			`#endif`
295			`}`
296
297			`recursive_timed_mutex(const recursive_timed_mutex&) = delete;`
298			`recursive_timed_mutex& operator=(const recursive_timed_mutex&) = delete;`
299
300			`void`
301			`lock()`
302			`{`
303			`int __e = __gthread_recursive_mutex_lock(&_M_mutex);`
304
305			`// EINVAL, EAGAIN, EBUSY, EINVAL, EDEADLK(may)`
306			`if (__e)`
307			`__throw_system_error(__e);`
308			`}`
309
310			`bool`
311			`try_lock()`
312			`{`
313			`// XXX EINVAL, EAGAIN, EBUSY`
314			`return !__gthread_recursive_mutex_trylock(&_M_mutex);`
315			`}`
316
317			`template`
318			`bool`
319			`try_lock_for(const chrono::duration<_Rep, _Period>& __rtime)`
320			`{ return __try_lock_for_impl(__rtime); }`
321
322			`template`
323			`bool`
324			`try_lock_until(const chrono::time_point<_Clock, _Duration>& __atime)`
325			`{`
326			`chrono::time_point<_Clock, chrono::seconds> __s =`
327			`chrono::time_point_cast(__atime);`
328
329			`chrono::nanoseconds __ns =`
330			`chrono::duration_cast(__atime - __s);`
331
332			`__gthread_time_t __ts = {`
333			`static_cast(__s.time_since_epoch().count()),`
334			`static_cast(__ns.count())`
335			`};`
336
337			`return !__gthread_recursive_mutex_timedlock(&_M_mutex, &__ts);`
338			`}`
339
340			`void`
341			`unlock()`
342			`{`
343			`// XXX EINVAL, EAGAIN, EBUSY`
344			`__gthread_recursive_mutex_unlock(&_M_mutex);`
345			`}`
346
347			`native_handle_type`
348			`native_handle()`
349			`{ return &_M_mutex; }`
350
351			`private:`
352			`template`
353			`typename enable_if<`
354			`ratio_less_equal<__clock_t::period, _Period>::value, bool>::type`
355			`__try_lock_for_impl(const chrono::duration<_Rep, _Period>& __rtime)`
356			`{`
357			`__clock_t::time_point __atime = __clock_t::now()`
358			`+ chrono::duration_cast<__clock_t::duration>(__rtime);`
359
360			`return try_lock_until(__atime);`
361			`}`
362
363			`template`
364			`typename enable_if<`
365			`!ratio_less_equal<__clock_t::period, _Period>::value, bool>::type`
366			`__try_lock_for_impl(const chrono::duration<_Rep, _Period>& __rtime)`
367			`{`
368			`__clock_t::time_point __atime = __clock_t::now()`
369			`+ ++chrono::duration_cast<__clock_t::duration>(__rtime);`
370
371			`return try_lock_until(__atime);`
372			`}`
373			`};`
374
375			`/// Do not acquire ownership of the mutex.`
376			`struct defer_lock_t { };`
377
378			`/// Try to acquire ownership of the mutex without blocking.`
379			`struct try_to_lock_t { };`
380
381			`/// Assume the calling thread has already obtained mutex ownership`
382			`/// and manage it.`
383			`struct adopt_lock_t { };`
384
385			`extern const defer_lock_t defer_lock;`
386			`extern const try_to_lock_t try_to_lock;`
387			`extern const adopt_lock_t adopt_lock;`
388
389			`/// @brief Scoped lock idiom.`
390			`// Acquire the mutex here with a constructor call, then release with`
391			`// the destructor call in accordance with RAII style.`
392			`template`
393			`class lock_guard`
394			`{`
395			`public:`
396			`typedef _Mutex mutex_type;`
397
398			`explicit lock_guard(mutex_type& __m) : _M_device(__m)`
399			`{ _M_device.lock(); }`
400
401			`lock_guard(mutex_type& __m, adopt_lock_t) : _M_device(__m)`
402			`{ } // calling thread owns mutex`
403
404			`~lock_guard()`
405			`{ _M_device.unlock(); }`
406
407			`lock_guard(const lock_guard&) = delete;`
408			`lock_guard& operator=(const lock_guard&) = delete;`
409
410			`private:`
411			`mutex_type& _M_device;`
412			`};`
413
414			`/// unique_lock`
415			`template`
416			`class unique_lock`
417			`{`
418			`public:`
419			`typedef _Mutex mutex_type;`
420
421			`unique_lock()`
422			`: _M_device(0), _M_owns(false)`
423			`{ }`
424
425			`explicit unique_lock(mutex_type& __m)`
426			`: _M_device(&__m), _M_owns(false)`
427			`{`
428			`lock();`
429			`_M_owns = true;`
430			`}`
431
432			`unique_lock(mutex_type& __m, defer_lock_t)`
433			`: _M_device(&__m), _M_owns(false)`
434			`{ }`
435
436			`unique_lock(mutex_type& __m, try_to_lock_t)`
437			`: _M_device(&__m), _M_owns(_M_device->try_lock())`
438			`{ }`
439
440			`unique_lock(mutex_type& __m, adopt_lock_t)`
441			`: _M_device(&__m), _M_owns(true)`
442			`{`
443			`// XXX calling thread owns mutex`
444			`}`
445
446			`template`
447			`unique_lock(mutex_type& __m,`
448			`const chrono::time_point<_Clock, _Duration>& __atime)`
449			`: _M_device(&__m), _M_owns(_M_device->try_lock_until(__atime))`
450			`{ }`
451
452			`template`
453			`unique_lock(mutex_type& __m,`
454			`const chrono::duration<_Rep, _Period>& __rtime)`
455			`: _M_device(&__m), _M_owns(_M_device->try_lock_for(__rtime))`
456			`{ }`
457
458			`~unique_lock()`
459			`{`
460			`if (_M_owns)`
461			`unlock();`
462			`}`
463
464			`unique_lock(const unique_lock&) = delete;`
465			`unique_lock& operator=(const unique_lock&) = delete;`
466
467			`unique_lock(unique_lock&& __u)`
468			`: _M_device(__u._M_device), _M_owns(__u._M_owns)`
469			`{`
470			`__u._M_device = 0;`
471			`__u._M_owns = false;`
472			`}`
473
474			`unique_lock& operator=(unique_lock&& __u)`
475			`{`
476			`if(_M_owns)`
477			`unlock();`
478
479			`unique_lock(std::move(__u)).swap(*this);`
480
481			`__u._M_device = 0;`
482			`__u._M_owns = false;`
483
484			`return *this;`
485			`}`
486
487			`void`
488			`lock()`
489			`{`
490			`if (!_M_device)`
491			`__throw_system_error(int(errc::operation_not_permitted));`
492			`else if (_M_owns)`
493			`__throw_system_error(int(errc::resource_deadlock_would_occur));`
494			`else`
495			`{`
496			`_M_device->lock();`
497			`_M_owns = true;`
498			`}`
499			`}`
500
501			`bool`
502			`try_lock()`
503			`{`
504			`if (!_M_device)`
505			`__throw_system_error(int(errc::operation_not_permitted));`
506			`else if (_M_owns)`
507			`__throw_system_error(int(errc::resource_deadlock_would_occur));`
508			`else`
509			`{`
510			`_M_owns = _M_device->try_lock();`
511			`return _M_owns;`
512			`}`
513			`}`
514
515			`template`
516			`bool`
517			`try_lock_until(const chrono::time_point<_Clock, _Duration>& __atime)`
518			`{`
519			`if (!_M_device)`
520			`__throw_system_error(int(errc::operation_not_permitted));`
521			`else if (_M_owns)`
522			`__throw_system_error(int(errc::resource_deadlock_would_occur));`
523			`else`
524			`{`
525			`_M_owns = _M_device->try_lock_until(__atime);`
526			`return _M_owns;`
527			`}`
528			`}`
529
530			`template`
531			`bool`
532			`try_lock_for(const chrono::duration<_Rep, _Period>& __rtime)`
533			`{`
534			`if (!_M_device)`
535			`__throw_system_error(int(errc::operation_not_permitted));`
536			`else if (_M_owns)`
537			`__throw_system_error(int(errc::resource_deadlock_would_occur));`
538			`else`
539			`{`
540			`_M_owns = _M_device->try_lock_for(__rtime);`
541			`return _M_owns;`
542			`}`
543			`}`
544
545			`void`
546			`unlock()`
547			`{`
548			`if (!_M_owns)`
549			`__throw_system_error(int(errc::operation_not_permitted));`
550			`else if (_M_device)`
551			`{`
552			`_M_device->unlock();`
553			`_M_owns = false;`
554			`}`
555			`}`
556
557			`void`
558			`swap(unique_lock& __u)`
559			`{`
560			`std::swap(_M_device, __u._M_device);`
561			`std::swap(_M_owns, __u._M_owns);`
562			`}`
563
564			`mutex_type*`
565			`release()`
566			`{`
567			`mutex_type* __ret = _M_device;`
568			`_M_device = 0;`
569			`_M_owns = false;`
570			`return __ret;`
571			`}`
572
573			`bool`
574			`owns_lock() const`
575			`{ return _M_owns; }`
576
577			`explicit operator bool() const`
578			`{ return owns_lock(); }`
579
580			`mutex_type*`
581			`mutex() const`
582			`{ return _M_device; }`
583
584			`private:`
585			`mutex_type* _M_device;`
586			`bool _M_owns; // XXX use atomic_bool`
587			`};`
588
589			`template`
590			`inline void`
591			`swap(unique_lock<_Mutex>& __x, unique_lock<_Mutex>& __y)`
592			`{ __x.swap(__y); }`
593
594			`template`
595			`struct __unlock_impl`
596			`{`
597			`template`
598			`static void`
599			`__do_unlock(tuple<_Lock&...>& __locks)`
600			`{`
601			`std::get<_Idx>(__locks).unlock();`
602			`__unlock_impl<_Idx - 1>::__do_unlock(__locks);`
603			`}`
604			`};`
605
606			`template<>`
607			`struct __unlock_impl<-1>`
608			`{`
609			`template`
610			`static void`
611			`__do_unlock(tuple<_Lock&...>&)`
612			`{ }`
613			`};`
614
615			`template`
616			`struct __try_lock_impl`
617			`{`
618			`template`
619			`static int`
620			`__do_try_lock(tuple<_Lock&...>& __locks)`
621			`{`
622			`if(std::get<_Idx>(__locks).try_lock())`
623			`{`
624			`return __try_lock_impl<_Idx + 1,`
625			`_Idx + 2 < sizeof...(_Lock)>::__do_try_lock(__locks);`
626			`}`
627			`else`
628			`{`
629			`__unlock_impl<_Idx>::__do_unlock(__locks);`
630			`return _Idx;`
631			`}`
632			`}`
633			`};`
634
635			`template`
636			`struct __try_lock_impl<_Idx, false>`
637			`{`
638			`template`
639			`static int`
640			`__do_try_lock(tuple<_Lock&...>& __locks)`
641			`{`
642			`if(std::get<_Idx>(__locks).try_lock())`
643			`return -1;`
644			`else`
645			`{`
646			`__unlock_impl<_Idx>::__do_unlock(__locks);`
647			`return _Idx;`
648			`}`
649			`}`
650			`};`
651
652			`/** @brief Generic try_lock.`
653			`* @param __l1 Meets Mutex requirements (try_lock() may throw).`
654			`* @param __l2 Meets Mutex requirements (try_lock() may throw).`
655			`* @param __l3 Meets Mutex requirements (try_lock() may throw).`
656			`* @return Returns -1 if all try_lock() calls return true. Otherwise returns`
657			`* a 0-based index corresponding to the argument that returned false.`
658			`* @post Either all arguments are locked, or none will be.`
659			`*`
660			`* Sequentially calls try_lock() on each argument.`
661			`*/`
662			`template`
663			`int`
664			`try_lock(_Lock1& __l1, _Lock2& __l2, _Lock3&... __l3)`
665			`{`
666			`tuple<_Lock1&, _Lock2&, _Lock3&...> __locks(__l1, __l2, __l3...);`
667			`return __try_lock_impl<0>::__do_try_lock(__locks);`
668			`}`
669
670			`/// lock`
671			`template`
672			`void`
673			`lock(_L1&, _L2&, _L3&...);`
674
675			`/// once_flag`
676			`struct once_flag`
677			`{`
678			`private:`
679			`typedef __gthread_once_t __native_type;`
680			`__native_type _M_once;`
681
682			`public:`
683			`once_flag()`
684			`{`
685			`__native_type __tmp = __GTHREAD_ONCE_INIT;`
686			`_M_once = __tmp;`
687			`}`
688
689			`once_flag(const once_flag&) = delete;`
690			`once_flag& operator=(const once_flag&) = delete;`
691
692			`template`
693			`friend void`
694			`call_once(once_flag& __once, _Callable __f, _Args&&... __args);`
695			`};`
696
697			`#ifdef _GLIBCXX_HAVE_TLS`
698			`extern __thread void* __once_callable;`
699			`extern __thread void (*__once_call)();`
700
701			`template`
702			`inline void`
703			`__once_call_impl()`
704			`{`
705			`((_Callable)__once_callable)();`
706			`}`
707			`#else`
708			`extern function __once_functor;`
709
710			`extern void`
711			`__set_once_functor_lock_ptr(unique_lock*);`
712
713			`extern mutex&`
714			`__get_once_mutex();`
715			`#endif`
716
717			`extern "C" void __once_proxy();`
718
719			`/// call_once`
720			`template`
721			`void`
722			`call_once(once_flag& __once, _Callable __f, _Args&&... __args)`
723			`{`
724			`#ifdef _GLIBCXX_HAVE_TLS`
725			`auto __bound_functor = std::bind(__f, __args...);`
726			`__once_callable = &__bound_functor;`
727			`__once_call = &__once_call_impl;`
728			`#else`
729			`unique_lock __functor_lock(__get_once_mutex());`
730			`__once_functor = std::bind(__f, __args...);`
731			`__set_once_functor_lock_ptr(&__functor_lock);`
732			`#endif`
733
734			`int __e = __gthread_once(&(__once._M_once), &__once_proxy);`
735
736			`#ifndef _GLIBCXX_HAVE_TLS`
737			`if (__functor_lock)`
738			`__set_once_functor_lock_ptr(0);`
739			`#endif`
740
741			`if (__e)`
742			`__throw_system_error(__e);`
743			`}`
744
745			`// @} group mutexes`
746			`}`
747
748			`#endif // _GLIBCXX_HAS_GTHREADS && _GLIBCXX_USE_C99_STDINT_TR1`
749
750			`#endif // __GXX_EXPERIMENTAL_CXX0X__`
751
752			`#endif // _GLIBCXX_MUTEX`