+2018-07-25 Jonathan Wakely <jwakely@redhat.com>
+
+ * include/Makefile.am: Add new <bits/unique_lock.h> header.
+ * include/Makefile.in: Regenerate.
+ * include/bits/std_mutex.h [!_GLIBCXX_USE_C99_STDINT_TR1] (mutex)
+ (lock_guard): Define independent of _GLIBCXX_USE_C99_STDINT_TR1.
+ (unique_lock): Move definition to ...
+ * include/bits/unique_lock.h: New header.
+ [!_GLIBCXX_USE_C99_STDINT_TR1] (unique_lock): Define unconditionally.
+ [_GLIBCXX_USE_C99_STDINT_TR1] (unique_lock(mutex_type&, time_point))
+ (unique_lock(mutex_type&, duration), unique_lock::try_lock_until)
+ (unique_lock::try_lock_for): Define only when <chrono> is usable.
+ * include/std/condition_variable: Include <bits/unique_lock.h>.
+ * include/std/mutex: Likewise.
+
2018-07-24 Jonathan Wakely <jwakely@redhat.com>
* config/abi/pre/gnu.ver: Export new symbols.
${bits_srcdir}/stringfwd.h \
${bits_srcdir}/string_view.tcc \
${bits_srcdir}/uniform_int_dist.h \
+ ${bits_srcdir}/unique_lock.h \
${bits_srcdir}/unique_ptr.h \
${bits_srcdir}/unordered_map.h \
${bits_srcdir}/unordered_set.h \
${bits_srcdir}/stringfwd.h \
${bits_srcdir}/string_view.tcc \
${bits_srcdir}/uniform_int_dist.h \
+ ${bits_srcdir}/unique_lock.h \
${bits_srcdir}/unique_ptr.h \
${bits_srcdir}/unordered_map.h \
${bits_srcdir}/unordered_set.h \
#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)
{
mutex_type& _M_device;
};
- /** @brief A movable scoped lock type.
- *
- * A unique_lock controls mutex ownership within a scope. Ownership of the
- * mutex can be delayed until after construction and can be transferred
- * to another unique_lock by move construction or move assignment. If a
- * mutex lock is owned when the destructor runs ownership will be released.
- */
- 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) noexcept
- : _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
--- /dev/null
+// std::unique_lock implementation -*- C++ -*-
+
+// Copyright (C) 2008-2018 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/unique_lock.h
+ * This is an internal header file, included by other library headers.
+ * Do not attempt to use it directly. @headername{mutex}
+ */
+
+#ifndef _GLIBCXX_UNIQUE_LOCK_H
+#define _GLIBCXX_UNIQUE_LOCK_H 1
+
+#pragma GCC system_header
+
+#if __cplusplus < 201103L
+# include <bits/c++0x_warning.h>
+#else
+
+#include <chrono>
+#include <bits/move.h> // for std::swap
+
+namespace std _GLIBCXX_VISIBILITY(default)
+{
+_GLIBCXX_BEGIN_NAMESPACE_VERSION
+
+ /**
+ * @ingroup mutexes
+ * @{
+ */
+
+ /** @brief A movable scoped lock type.
+ *
+ * A unique_lock controls mutex ownership within a scope. Ownership of the
+ * mutex can be delayed until after construction and can be transferred
+ * to another unique_lock by move construction or move assignment. If a
+ * mutex lock is owned when the destructor runs ownership will be released.
+ */
+ 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) noexcept
+ : _M_device(std::__addressof(__m)), _M_owns(true)
+ {
+ // XXX calling thread owns mutex
+ }
+
+#ifdef _GLIBCXX_USE_C99_STDINT_TR1
+ 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))
+ { }
+#endif
+
+ ~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;
+ }
+ }
+
+#ifdef _GLIBCXX_USE_C99_STDINT_TR1
+ 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;
+ }
+ }
+#endif
+
+ 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;
+ };
+
+ /// 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 // C++11
+#endif // _GLIBCXX_UNIQUE_LOCK_H
#include <chrono>
#include <bits/std_mutex.h>
+#include <bits/unique_lock.h>
#include <ext/concurrence.h>
#include <bits/alloc_traits.h>
#include <bits/allocator.h>
#include <type_traits>
#include <system_error>
#include <bits/std_mutex.h>
+#include <bits/unique_lock.h>
#if ! _GTHREAD_USE_MUTEX_TIMEDLOCK
# include <condition_variable>
# include <thread>
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