+2015-09-03 Jonathan Wakely <jwakely@redhat.com>
+
+ PR libstdc++/65704
+ * include/Makefile.am: Add <bits/mutex.h>.
+ * include/Makefile.in: Regenerate.
+ * include/bits/mutex.h (__mutex_base, mutex, lock_guard, unique_lock):
+ New file containing types moved from <mutex>.
+ * include/std/condition_variable: Include <bits/mutex.h> instead of
+ <mutex>.
+ * include/std/mutex (__mutex_base, mutex, lock_guard, unique_lock):
+ Move to <bits/mutex.h>.
+ * testsuite/30_threads/recursive_timed_mutex/cons/1.cc: Remove
+ dg-require-gthreads-timed.
+ * testsuite/30_threads/recursive_timed_mutex/cons/assign_neg.cc:
+ Likewise.
+ * testsuite/30_threads/recursive_timed_mutex/cons/copy_neg.cc:
+ Likewise.
+ * testsuite/30_threads/recursive_timed_mutex/dest/
+ destructor_locked.cc: Likewise.
+ * testsuite/30_threads/recursive_timed_mutex/lock/1.cc: Likewise.
+ * testsuite/30_threads/recursive_timed_mutex/lock/2.cc: Likewise.
+ * testsuite/30_threads/recursive_timed_mutex/try_lock/1.cc: Likewise.
+ * testsuite/30_threads/recursive_timed_mutex/try_lock/2.cc: Likewise.
+ * testsuite/30_threads/recursive_timed_mutex/try_lock_for/1.cc:
+ Likewise.
+ * testsuite/30_threads/recursive_timed_mutex/try_lock_for/2.cc:
+ Likewise.
+ * testsuite/30_threads/recursive_timed_mutex/try_lock_for/3.cc:
+ Likewise.
+ * testsuite/30_threads/recursive_timed_mutex/try_lock_until/1.cc:
+ Likewise.
+ * testsuite/30_threads/recursive_timed_mutex/try_lock_until/2.cc:
+ Likewise.
+ * testsuite/30_threads/recursive_timed_mutex/unlock/1.cc: Likewise.
+ * testsuite/30_threads/timed_mutex/cons/1.cc: Likewise.
+ * testsuite/30_threads/timed_mutex/cons/assign_neg.cc: Likewise.
+ * testsuite/30_threads/timed_mutex/cons/copy_neg.cc: Likewise.
+ * testsuite/30_threads/timed_mutex/dest/destructor_locked.cc:
+ Likewise.
+ * testsuite/30_threads/timed_mutex/lock/1.cc: Likewise.
+ * testsuite/30_threads/timed_mutex/requirements/standard_layout.cc:
+ Likewise.
+ * testsuite/30_threads/timed_mutex/try_lock/1.cc: Likewise.
+ * testsuite/30_threads/timed_mutex/try_lock/2.cc: Likewise.
+ * testsuite/30_threads/timed_mutex/try_lock_for/1.cc: Likewise.
+ * testsuite/30_threads/timed_mutex/try_lock_for/2.cc: Likewise.
+ * testsuite/30_threads/timed_mutex/try_lock_for/3.cc: Likewise.
+ * testsuite/30_threads/timed_mutex/try_lock_until/1.cc: Likewise.
+ * testsuite/30_threads/timed_mutex/try_lock_until/2.cc: Likewise.
+ * testsuite/30_threads/timed_mutex/try_lock_until/57641.cc: Likewise.
+ * testsuite/30_threads/timed_mutex/unlock/1.cc: Likewise.
+ * testsuite/30_threads/unique_lock/cons/5.cc: Likewise.
+ * testsuite/30_threads/unique_lock/cons/6.cc: Likewise.
+ * testsuite/30_threads/unique_lock/locking/3.cc: Likewise.
+ * testsuite/30_threads/unique_lock/locking/4.cc: Likewise.
+
2015-09-04 Edward Smith-Rowland <3dw4rd@verizon.net>
Jonathan Wakely <jwakely@redhat.com>
${bits_srcdir}/mask_array.h \
${bits_srcdir}/memoryfwd.h \
${bits_srcdir}/move.h \
+ ${bits_srcdir}/mutex.h \
${bits_srcdir}/ostream.tcc \
${bits_srcdir}/ostream_insert.h \
${bits_srcdir}/parse_numbers.h \
${bits_srcdir}/mask_array.h \
${bits_srcdir}/memoryfwd.h \
${bits_srcdir}/move.h \
+ ${bits_srcdir}/mutex.h \
${bits_srcdir}/ostream.tcc \
${bits_srcdir}/ostream_insert.h \
${bits_srcdir}/parse_numbers.h \
--- /dev/null
+// std::mutex implementation -*- C++ -*-
+
+// Copyright (C) 2003-2015 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
+// <http://www.gnu.org/licenses/>.
+
+/** @file bits/mutex.h
+ * This is an internal header file, included by other library headers.
+ * Do not attempt to use it directly. @headername{mutex}
+ */
+
+#ifndef _GLIBCXX_MUTEX_H
+#define _GLIBCXX_MUTEX_H 1
+
+#pragma GCC system_header
+
+#if __cplusplus < 201103L
+# include <bits/c++0x_warning.h>
+#else
+
+#include <system_error>
+#include <bits/functexcept.h>
+#include <bits/gthr.h>
+#include <bits/move.h> // for std::swap
+
+#ifdef _GLIBCXX_USE_C99_STDINT_TR1
+
+namespace std _GLIBCXX_VISIBILITY(default)
+{
+_GLIBCXX_BEGIN_NAMESPACE_VERSION
+
+ /**
+ * @defgroup mutexes Mutexes
+ * @ingroup concurrency
+ *
+ * Classes for mutex support.
+ * @{
+ */
+
+#ifdef _GLIBCXX_HAS_GTHREADS
+ // Common base class for std::mutex and std::timed_mutex
+ class __mutex_base
+ {
+ protected:
+ typedef __gthread_mutex_t __native_type;
+
+#ifdef __GTHREAD_MUTEX_INIT
+ __native_type _M_mutex = __GTHREAD_MUTEX_INIT;
+
+ constexpr __mutex_base() noexcept = default;
+#else
+ __native_type _M_mutex;
+
+ __mutex_base() noexcept
+ {
+ // XXX EAGAIN, ENOMEM, EPERM, EBUSY(may), EINVAL(may)
+ __GTHREAD_MUTEX_INIT_FUNCTION(&_M_mutex);
+ }
+
+ ~__mutex_base() noexcept { __gthread_mutex_destroy(&_M_mutex); }
+#endif
+
+ __mutex_base(const __mutex_base&) = delete;
+ __mutex_base& operator=(const __mutex_base&) = delete;
+ };
+
+ /// mutex
+ class mutex : private __mutex_base
+ {
+ public:
+ typedef __native_type* native_handle_type;
+
+#ifdef __GTHREAD_MUTEX_INIT
+ constexpr
+#endif
+ mutex() noexcept = default;
+ ~mutex() = default;
+
+ 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() noexcept
+ {
+ // 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; }
+ };
+
+#endif // _GLIBCXX_HAS_GTHREADS
+
+ /// 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 { };
+
+ constexpr defer_lock_t defer_lock { };
+ constexpr try_to_lock_t try_to_lock { };
+ constexpr 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<typename _Mutex>
+ 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<typename _Mutex>
+ class unique_lock
+ {
+ public:
+ typedef _Mutex mutex_type;
+
+ unique_lock() noexcept
+ : _M_device(0), _M_owns(false)
+ { }
+
+ explicit unique_lock(mutex_type& __m)
+ : _M_device(std::__addressof(__m)), _M_owns(false)
+ {
+ lock();
+ _M_owns = true;
+ }
+
+ unique_lock(mutex_type& __m, defer_lock_t) noexcept
+ : _M_device(std::__addressof(__m)), _M_owns(false)
+ { }
+
+ unique_lock(mutex_type& __m, try_to_lock_t)
+ : _M_device(std::__addressof(__m)), _M_owns(_M_device->try_lock())
+ { }
+
+ unique_lock(mutex_type& __m, adopt_lock_t)
+ : _M_device(std::__addressof(__m)), _M_owns(true)
+ {
+ // XXX calling thread owns mutex
+ }
+
+ template<typename _Clock, typename _Duration>
+ unique_lock(mutex_type& __m,
+ const chrono::time_point<_Clock, _Duration>& __atime)
+ : _M_device(std::__addressof(__m)),
+ _M_owns(_M_device->try_lock_until(__atime))
+ { }
+
+ template<typename _Rep, typename _Period>
+ unique_lock(mutex_type& __m,
+ const chrono::duration<_Rep, _Period>& __rtime)
+ : _M_device(std::__addressof(__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) noexcept
+ : _M_device(__u._M_device), _M_owns(__u._M_owns)
+ {
+ __u._M_device = 0;
+ __u._M_owns = false;
+ }
+
+ unique_lock& operator=(unique_lock&& __u) noexcept
+ {
+ 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<typename _Clock, typename _Duration>
+ 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<typename _Rep, typename _Period>
+ 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) noexcept
+ {
+ std::swap(_M_device, __u._M_device);
+ std::swap(_M_owns, __u._M_owns);
+ }
+
+ mutex_type*
+ release() noexcept
+ {
+ mutex_type* __ret = _M_device;
+ _M_device = 0;
+ _M_owns = false;
+ return __ret;
+ }
+
+ bool
+ owns_lock() const noexcept
+ { return _M_owns; }
+
+ explicit operator bool() const noexcept
+ { return owns_lock(); }
+
+ mutex_type*
+ mutex() const noexcept
+ { return _M_device; }
+
+ private:
+ mutex_type* _M_device;
+ bool _M_owns; // XXX use atomic_bool
+ };
+
+ /// Swap overload for unique_lock objects.
+ template<typename _Mutex>
+ inline void
+ swap(unique_lock<_Mutex>& __x, unique_lock<_Mutex>& __y) noexcept
+ { __x.swap(__y); }
+
+ // @} group mutexes
+_GLIBCXX_END_NAMESPACE_VERSION
+} // namespace
+#endif // _GLIBCXX_USE_C99_STDINT_TR1
+
+#endif // C++11
+
+#endif // _GLIBCXX_MUTEX_H
#else
#include <chrono>
-#include <mutex>
+#include <bits/mutex.h>
#include <ext/concurrence.h>
#include <bits/alloc_traits.h>
#include <bits/allocator.h>
#include <type_traits>
#include <functional>
#include <system_error>
-#include <bits/functexcept.h>
-#include <bits/gthr.h>
-#include <bits/move.h> // for std::swap
+#include <bits/mutex.h>
+#if ! _GTHREAD_USE_MUTEX_TIMEDLOCK
+# include <condition_variable>
+# include <thread>
+#endif
#ifdef _GLIBCXX_USE_C99_STDINT_TR1
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION
-#ifdef _GLIBCXX_HAS_GTHREADS
- // Common base class for std::mutex and std::timed_mutex
- class __mutex_base
- {
- protected:
- typedef __gthread_mutex_t __native_type;
-
-#ifdef __GTHREAD_MUTEX_INIT
- __native_type _M_mutex = __GTHREAD_MUTEX_INIT;
-
- constexpr __mutex_base() noexcept = default;
-#else
- __native_type _M_mutex;
-
- __mutex_base() noexcept
- {
- // XXX EAGAIN, ENOMEM, EPERM, EBUSY(may), EINVAL(may)
- __GTHREAD_MUTEX_INIT_FUNCTION(&_M_mutex);
- }
-
- ~__mutex_base() noexcept { __gthread_mutex_destroy(&_M_mutex); }
-#endif
+ /**
+ * @ingroup mutexes
+ * @{
+ */
- __mutex_base(const __mutex_base&) = delete;
- __mutex_base& operator=(const __mutex_base&) = delete;
- };
+#ifdef _GLIBCXX_HAS_GTHREADS
// Common base class for std::recursive_mutex and std::recursive_timed_mutex
class __recursive_mutex_base
#endif
};
- /**
- * @defgroup mutexes Mutexes
- * @ingroup concurrency
- *
- * Classes for mutex support.
- * @{
- */
-
- /// mutex
- class mutex : private __mutex_base
- {
- public:
- typedef __native_type* native_handle_type;
-
-#ifdef __GTHREAD_MUTEX_INIT
- constexpr
-#endif
- mutex() noexcept = default;
- ~mutex() = default;
-
- 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() noexcept
- {
- // 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 : private __recursive_mutex_base
{
_M_timedlock(const __gthread_time_t& __ts)
{ return !__gthread_recursive_mutex_timedlock(&_M_mutex, &__ts); }
};
-#endif
-#endif // _GLIBCXX_HAS_GTHREADS
-
- /// 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 { };
-
- constexpr defer_lock_t defer_lock { };
- constexpr try_to_lock_t try_to_lock { };
- constexpr 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<typename _Mutex>
- class lock_guard
- {
- public:
- typedef _Mutex mutex_type;
- explicit lock_guard(mutex_type& __m) : _M_device(__m)
- { _M_device.lock(); }
+#else // !_GTHREAD_USE_MUTEX_TIMEDLOCK
- lock_guard(mutex_type& __m, adopt_lock_t) : _M_device(__m)
- { } // calling thread owns mutex
+ /// timed_mutex
+ class timed_mutex
+ {
+ mutex _M_mut;
+ condition_variable _M_cv;
+ bool _M_locked = false;
- ~lock_guard()
- { _M_device.unlock(); }
+ public:
- lock_guard(const lock_guard&) = delete;
- lock_guard& operator=(const lock_guard&) = delete;
+ timed_mutex() = default;
+ ~timed_mutex() { _GLIBCXX_DEBUG_ASSERT( !_M_locked ); }
- private:
- mutex_type& _M_device;
- };
+ timed_mutex(const timed_mutex&) = delete;
+ timed_mutex& operator=(const timed_mutex&) = delete;
- /// unique_lock
- template<typename _Mutex>
- class unique_lock
+ void
+ lock()
{
- public:
- typedef _Mutex mutex_type;
+ unique_lock<mutex> __lk(_M_mut);
+ _M_cv.wait(__lk, [&]{ return !_M_locked; });
+ _M_locked = true;
+ }
- unique_lock() noexcept
- : _M_device(0), _M_owns(false)
- { }
+ bool
+ try_lock()
+ {
+ lock_guard<mutex> __lk(_M_mut);
+ if (_M_locked)
+ return false;
+ _M_locked = true;
+ return true;
+ }
- explicit unique_lock(mutex_type& __m)
- : _M_device(std::__addressof(__m)), _M_owns(false)
+ template<typename _Rep, typename _Period>
+ bool
+ try_lock_for(const chrono::duration<_Rep, _Period>& __rtime)
{
- lock();
- _M_owns = true;
+ unique_lock<mutex> __lk(_M_mut);
+ if (!_M_cv.wait_for(__lk, __rtime, [&]{ return !_M_locked; }))
+ return false;
+ _M_locked = true;
+ return true;
}
- unique_lock(mutex_type& __m, defer_lock_t) noexcept
- : _M_device(std::__addressof(__m)), _M_owns(false)
- { }
-
- unique_lock(mutex_type& __m, try_to_lock_t)
- : _M_device(std::__addressof(__m)), _M_owns(_M_device->try_lock())
- { }
-
- unique_lock(mutex_type& __m, adopt_lock_t)
- : _M_device(std::__addressof(__m)), _M_owns(true)
+ template<typename _Clock, typename _Duration>
+ bool
+ try_lock_until(const chrono::time_point<_Clock, _Duration>& __atime)
{
- // XXX calling thread owns mutex
+ unique_lock<mutex> __lk(_M_mut);
+ if (!_M_cv.wait_until(__lk, __atime, [&]{ return !_M_locked; }))
+ return false;
+ _M_locked = true;
+ return true;
}
- template<typename _Clock, typename _Duration>
- unique_lock(mutex_type& __m,
- const chrono::time_point<_Clock, _Duration>& __atime)
- : _M_device(std::__addressof(__m)),
- _M_owns(_M_device->try_lock_until(__atime))
- { }
+ void
+ unlock()
+ {
+ lock_guard<mutex> __lk(_M_mut);
+ _GLIBCXX_DEBUG_ASSERT( _M_locked );
+ _M_locked = false;
+ _M_cv.notify_one();
+ }
+ };
- template<typename _Rep, typename _Period>
- unique_lock(mutex_type& __m,
- const chrono::duration<_Rep, _Period>& __rtime)
- : _M_device(std::__addressof(__m)),
- _M_owns(_M_device->try_lock_for(__rtime))
- { }
+ /// recursive_timed_mutex
+ class recursive_timed_mutex
+ {
+ mutex _M_mut;
+ condition_variable _M_cv;
+ thread::id _M_owner;
+ unsigned _M_count = 0;
- ~unique_lock()
- {
- if (_M_owns)
- unlock();
- }
+ // Predicate type that tests whether the current thread can lock a mutex.
+ struct _Can_lock
+ {
+ _Can_lock(const recursive_timed_mutex* __mx)
+ : _M_mx(__mx), _M_caller(this_thread::get_id()) { }
- unique_lock(const unique_lock&) = delete;
- unique_lock& operator=(const unique_lock&) = delete;
+ // Returns true if the mutex is unlocked or is locked by _M_caller.
+ bool
+ operator()() const noexcept
+ { return _M_mx->_M_count == 0 || _M_mx->_M_owner == _M_caller; }
- unique_lock(unique_lock&& __u) noexcept
- : _M_device(__u._M_device), _M_owns(__u._M_owns)
- {
- __u._M_device = 0;
- __u._M_owns = false;
- }
+ const recursive_timed_mutex* _M_mx;
+ thread::id _M_caller;
+ };
- unique_lock& operator=(unique_lock&& __u) noexcept
- {
- if(_M_owns)
- unlock();
+ public:
- unique_lock(std::move(__u)).swap(*this);
+ recursive_timed_mutex() = default;
+ ~recursive_timed_mutex() { _GLIBCXX_DEBUG_ASSERT( _M_count == 0 ); }
- __u._M_device = 0;
- __u._M_owns = false;
+ recursive_timed_mutex(const recursive_timed_mutex&) = delete;
+ recursive_timed_mutex& operator=(const recursive_timed_mutex&) = delete;
- return *this;
- }
+ void
+ lock()
+ {
+ _Can_lock __can_lock{this};
+ unique_lock<mutex> __lk(_M_mut);
+ _M_cv.wait(__lk, __can_lock);
+ if (_M_count == -1u)
+ __throw_system_error(EAGAIN); // [thread.timedmutex.recursive]/3
+ _M_owner = __id;
+ ++_M_count;
+ }
+
+ bool
+ try_lock()
+ {
+ _Can_lock __can_lock{this};
+ lock_guard<mutex> __lk(_M_mut);
+ if (!__can_lock())
+ return false;
+ if (_M_count == -1u)
+ return false;
+ _M_owner = __id;
+ ++_M_count;
+ return true;
+ }
- void
- lock()
+ template<typename _Rep, typename _Period>
+ 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_device->lock();
- _M_owns = true;
- }
+ _Can_lock __can_lock{this};
+ unique_lock<mutex> __lk(_M_mut);
+ if (!_M_cv.wait_for(__lk, __rtime, __can_lock);
+ return false;
+ if (_M_count == -1u)
+ return false;
+ _M_owner = __id;
+ ++_M_count;
+ return true;
}
+ template<typename _Clock, typename _Duration>
bool
- try_lock()
+ 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();
- return _M_owns;
- }
+ _Can_lock __can_lock{this};
+ unique_lock<mutex> __lk(_M_mut);
+ if (!_M_cv.wait_until(__lk, __atime, __can_lock);
+ return false;
+ if (_M_count == -1u)
+ return false;
+ _M_owner = __id;
+ ++_M_count;
+ return true;
}
- template<typename _Clock, typename _Duration>
- bool
- try_lock_until(const chrono::time_point<_Clock, _Duration>& __atime)
+ void
+ unlock()
+ {
+ lock_guard<mutex> __lk(_M_mut);
+ _GLIBCXX_DEBUG_ASSERT( _M_owner == this_thread::get_id() );
+ _GLIBCXX_DEBUG_ASSERT( _M_count > 0 );
+ if (--_M_count == 0)
{
- 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;
- }
+ _M_owner = {};
+ _M_cv.notify_one();
}
+ }
+ };
- template<typename _Rep, typename _Period>
- 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) noexcept
- {
- std::swap(_M_device, __u._M_device);
- std::swap(_M_owns, __u._M_owns);
- }
-
- mutex_type*
- release() noexcept
- {
- mutex_type* __ret = _M_device;
- _M_device = 0;
- _M_owns = false;
- return __ret;
- }
-
- bool
- owns_lock() const noexcept
- { return _M_owns; }
-
- explicit operator bool() const noexcept
- { return owns_lock(); }
-
- mutex_type*
- mutex() const noexcept
- { return _M_device; }
-
- private:
- mutex_type* _M_device;
- bool _M_owns; // XXX use atomic_bool
- };
-
- /// Swap overload for unique_lock objects.
- template<typename _Mutex>
- inline void
- swap(unique_lock<_Mutex>& __x, unique_lock<_Mutex>& __y) noexcept
- { __x.swap(__y); }
+#endif
+#endif // _GLIBCXX_HAS_GTHREADS
template<typename _Lock>
inline unique_lock<_Lock>
// { dg-options " -std=gnu++11 -pthreads" { target *-*-solaris* } }
// { dg-options " -std=gnu++11 " { target *-*-cygwin *-*-rtems* *-*-darwin* } }
// { dg-require-cstdint "" }
-// { dg-require-gthreads-timed "" }
// Copyright (C) 2008-2015 Free Software Foundation, Inc.
//
// { dg-do compile }
// { dg-options "-std=gnu++11" }
// { dg-require-cstdint "" }
-// { dg-require-gthreads-timed "" }
// Copyright (C) 2008-2015 Free Software Foundation, Inc.
//
// { dg-do compile }
// { dg-options "-std=gnu++11" }
// { dg-require-cstdint "" }
-// { dg-require-gthreads-timed "" }
// Copyright (C) 2008-2015 Free Software Foundation, Inc.
//
// { dg-options " -std=gnu++11 -pthreads" { target *-*-solaris* } }
// { dg-options " -std=gnu++11 " { target *-*-cygwin *-*-rtems* *-*-darwin* } }
// { dg-require-cstdint "" }
-// { dg-require-gthreads-timed "" }
// Copyright (C) 2008-2015 Free Software Foundation, Inc.
//
// { dg-options " -std=gnu++11 -pthreads" { target *-*-solaris* } }
// { dg-options " -std=gnu++11 " { target *-*-cygwin *-*-rtems* *-*-darwin* } }
// { dg-require-cstdint "" }
-// { dg-require-gthreads-timed "" }
// Copyright (C) 2008-2015 Free Software Foundation, Inc.
//
// { dg-options " -std=gnu++11 -pthreads" { target *-*-solaris* } }
// { dg-options " -std=gnu++11 " { target *-*-cygwin *-*-rtems* *-*-darwin* } }
// { dg-require-cstdint "" }
-// { dg-require-gthreads-timed "" }
// Copyright (C) 2008-2015 Free Software Foundation, Inc.
//
// { dg-options " -std=gnu++11 -pthreads" { target *-*-solaris* } }
// { dg-options " -std=gnu++11 " { target *-*-cygwin *-*-rtems* *-*-darwin* } }
// { dg-require-cstdint "" }
-// { dg-require-gthreads-timed "" }
// Copyright (C) 2008-2015 Free Software Foundation, Inc.
//
// { dg-options "-std=gnu++11 -pthreads" { target *-*-solaris* } }
// { dg-options "-std=gnu++11 " { target *-*-cygwin *-*-rtems* *-*-darwin* } }
// { dg-require-cstdint "" }
-// { dg-require-gthreads-timed "" }
// Copyright (C) 2008-2015 Free Software Foundation, Inc.
//
// { dg-options " -std=gnu++11 -pthreads" { target *-*-solaris* } }
// { dg-options " -std=gnu++11 " { target *-*-cygwin *-*-rtems* *-*-darwin* } }
// { dg-require-cstdint "" }
-// { dg-require-gthreads-timed "" }
// Copyright (C) 2008-2015 Free Software Foundation, Inc.
//
// { dg-options " -std=gnu++11 -pthreads" { target *-*-solaris* } }
// { dg-options " -std=gnu++11 " { target *-*-cygwin *-*-rtems* *-*-darwin* } }
// { dg-require-cstdint "" }
-// { dg-require-gthreads-timed "" }
// Copyright (C) 2008-2015 Free Software Foundation, Inc.
//
// { dg-options " -std=gnu++11 -pthreads" { target *-*-solaris* } }
// { dg-options " -std=gnu++11 " { target *-*-cygwin *-*-rtems* *-*-darwin* } }
// { dg-require-cstdint "" }
-// { dg-require-gthreads-timed "" }
// Copyright (C) 2008-2015 Free Software Foundation, Inc.
//
// { dg-options " -std=gnu++11 -pthreads" { target *-*-solaris* } }
// { dg-options " -std=gnu++11 " { target *-*-cygwin *-*-rtems* *-*-darwin* } }
// { dg-require-cstdint "" }
-// { dg-require-gthreads-timed "" }
// Copyright (C) 2008-2015 Free Software Foundation, Inc.
//
// { dg-options " -std=gnu++11 -pthreads" { target *-*-solaris* } }
// { dg-options " -std=gnu++11 " { target *-*-cygwin *-*-rtems* *-*-darwin* } }
// { dg-require-cstdint "" }
-// { dg-require-gthreads-timed "" }
// Copyright (C) 2008-2015 Free Software Foundation, Inc.
//
// { dg-options " -std=gnu++11 -pthreads" { target *-*-solaris* } }
// { dg-options " -std=gnu++11 " { target *-*-cygwin *-*-rtems* *-*-darwin* } }
// { dg-require-cstdint "" }
-// { dg-require-gthreads-timed "" }
// Copyright (C) 2008-2015 Free Software Foundation, Inc.
//
// { dg-options " -std=gnu++11 -pthreads" { target *-*-solaris* } }
// { dg-options " -std=gnu++11 " { target *-*-cygwin *-*-rtems* *-*-darwin* } }
// { dg-require-cstdint "" }
-// { dg-require-gthreads-timed "" }
// Copyright (C) 2008-2015 Free Software Foundation, Inc.
//
// { dg-do compile }
// { dg-options "-std=gnu++11" }
// { dg-require-cstdint "" }
-// { dg-require-gthreads-timed "" }
// Copyright (C) 2008-2015 Free Software Foundation, Inc.
//
// { dg-do compile }
// { dg-options "-std=gnu++11" }
// { dg-require-cstdint "" }
-// { dg-require-gthreads-timed "" }
// Copyright (C) 2008-2015 Free Software Foundation, Inc.
//
// { dg-options " -std=gnu++11 -pthreads" { target *-*-solaris* } }
// { dg-options " -std=gnu++11 " { target *-*-cygwin *-*-rtems* *-*-darwin* } }
// { dg-require-cstdint "" }
-// { dg-require-gthreads-timed "" }
// Copyright (C) 2008-2015 Free Software Foundation, Inc.
//
// { dg-options " -std=gnu++11 -pthreads" { target *-*-solaris* } }
// { dg-options " -std=gnu++11 " { target *-*-cygwin *-*-rtems* *-*-darwin* } }
// { dg-require-cstdint "" }
-// { dg-require-gthreads-timed "" }
// Copyright (C) 2008-2015 Free Software Foundation, Inc.
//
// { dg-do compile }
// { dg-options "-std=gnu++11" }
// { dg-require-cstdint "" }
-// { dg-require-gthreads-timed "" }
// Copyright (C) 2009-2015 Free Software Foundation, Inc.
//
// { dg-options " -std=gnu++11 -pthreads" { target *-*-solaris* } }
// { dg-options " -std=gnu++11 " { target *-*-cygwin *-*-rtems* *-*-darwin* } }
// { dg-require-cstdint "" }
-// { dg-require-gthreads-timed "" }
// Copyright (C) 2008-2015 Free Software Foundation, Inc.
//
// { dg-options " -std=gnu++11 -pthreads" { target *-*-solaris* } }
// { dg-options " -std=gnu++11 " { target *-*-cygwin *-*-rtems* *-*-darwin* } }
// { dg-require-cstdint "" }
-// { dg-require-gthreads-timed "" }
// Copyright (C) 2008-2015 Free Software Foundation, Inc.
//
// { dg-options " -std=gnu++11 -pthreads" { target *-*-solaris* } }
// { dg-options " -std=gnu++11 " { target *-*-cygwin *-*-rtems* *-*-darwin* } }
// { dg-require-cstdint "" }
-// { dg-require-gthreads-timed "" }
// Copyright (C) 2008-2015 Free Software Foundation, Inc.
//
// { dg-options " -std=gnu++11 -pthreads" { target *-*-solaris* } }
// { dg-options " -std=gnu++11 " { target *-*-cygwin *-*-rtems* *-*-darwin* } }
// { dg-require-cstdint "" }
-// { dg-require-gthreads-timed "" }
// Copyright (C) 2008-2015 Free Software Foundation, Inc.
//
// { dg-options " -std=gnu++11 -pthreads" { target *-*-solaris* } }
// { dg-options " -std=gnu++11 " { target *-*-cygwin *-*-rtems* *-*-darwin* } }
// { dg-require-cstdint "" }
-// { dg-require-gthreads-timed "" }
// Copyright (C) 2008-2015 Free Software Foundation, Inc.
//
// { dg-options " -std=gnu++11 -pthreads" { target *-*-solaris* } }
// { dg-options " -std=gnu++11 " { target *-*-cygwin *-*-rtems* *-*-darwin* } }
// { dg-require-cstdint "" }
-// { dg-require-gthreads-timed "" }
// Copyright (C) 2008-2015 Free Software Foundation, Inc.
//
// { dg-options " -std=gnu++11 -pthreads" { target *-*-solaris* } }
// { dg-options " -std=gnu++11 " { target *-*-cygwin *-*-rtems* *-*-darwin* } }
// { dg-require-cstdint "" }
-// { dg-require-gthreads-timed "" }
// Copyright (C) 2008-2015 Free Software Foundation, Inc.
//
// { dg-options " -std=gnu++11 -pthreads" { target *-*-solaris* } }
// { dg-options " -std=gnu++11 " { target *-*-cygwin *-*-rtems* *-*-darwin* } }
// { dg-require-cstdint "" }
-// { dg-require-gthreads-timed "" }
// Copyright (C) 2013-2015 Free Software Foundation, Inc.
//
// { dg-options " -std=gnu++11 -pthreads" { target *-*-solaris* } }
// { dg-options " -std=gnu++11 " { target *-*-cygwin *-*-rtems* *-*-darwin* } }
// { dg-require-cstdint "" }
-// { dg-require-gthreads-timed "" }
// Copyright (C) 2008-2015 Free Software Foundation, Inc.
//
// { dg-options " -std=gnu++11 -pthreads" { target *-*-solaris* } }
// { dg-options " -std=gnu++11 " { target *-*-cygwin *-*-rtems* *-*-darwin* } }
// { dg-require-cstdint "" }
-// { dg-require-gthreads-timed "" }
// Copyright (C) 2008-2015 Free Software Foundation, Inc.
//
// { dg-options " -std=gnu++11 -pthreads" { target *-*-solaris* } }
// { dg-options " -std=gnu++11 " { target *-*-cygwin *-*-rtems* *-*-darwin* } }
// { dg-require-cstdint "" }
-// { dg-require-gthreads-timed "" }
// Copyright (C) 2008-2015 Free Software Foundation, Inc.
//
// { dg-options " -std=gnu++11 -pthreads" { target *-*-solaris* } }
// { dg-options " -std=gnu++11 " { target *-*-cygwin *-*-rtems* *-*-darwin* } }
// { dg-require-cstdint "" }
-// { dg-require-gthreads-timed "" }
// Copyright (C) 2008-2015 Free Software Foundation, Inc.
//
// { dg-options " -std=gnu++11 -pthreads" { target *-*-solaris* } }
// { dg-options " -std=gnu++11 " { target *-*-cygwin *-*-rtems* *-*-darwin* } }
// { dg-require-cstdint "" }
-// { dg-require-gthreads-timed "" }
// Copyright (C) 2008-2015 Free Software Foundation, Inc.
//
projects / gcc.git / commitdiff