29 #ifndef _GLIBCXX_MUTEX 30 #define _GLIBCXX_MUTEX 1 32 #pragma GCC system_header 34 #if __cplusplus < 201103L 45 #include <bits/gthr.h> 49 #ifdef _GLIBCXX_USE_C99_STDINT_TR1 51 namespace std _GLIBCXX_VISIBILITY(default)
53 _GLIBCXX_BEGIN_NAMESPACE_VERSION
55 #ifdef _GLIBCXX_HAS_GTHREADS 60 typedef __gthread_mutex_t __native_type;
62 #ifdef __GTHREAD_MUTEX_INIT 63 __native_type _M_mutex = __GTHREAD_MUTEX_INIT;
65 constexpr __mutex_base() noexcept = default;
67 __native_type _M_mutex;
69 __mutex_base() noexcept
72 __GTHREAD_MUTEX_INIT_FUNCTION(&_M_mutex);
75 ~__mutex_base() noexcept { __gthread_mutex_destroy(&_M_mutex); }
78 __mutex_base(
const __mutex_base&) =
delete;
79 __mutex_base& operator=(
const __mutex_base&) =
delete;
83 class __recursive_mutex_base
86 typedef __gthread_recursive_mutex_t __native_type;
88 __recursive_mutex_base(
const __recursive_mutex_base&) =
delete;
89 __recursive_mutex_base& operator=(
const __recursive_mutex_base&) =
delete;
91 #ifdef __GTHREAD_RECURSIVE_MUTEX_INIT 92 __native_type _M_mutex = __GTHREAD_RECURSIVE_MUTEX_INIT;
94 __recursive_mutex_base() =
default;
96 __native_type _M_mutex;
98 __recursive_mutex_base()
101 __GTHREAD_RECURSIVE_MUTEX_INIT_FUNCTION(&_M_mutex);
104 ~__recursive_mutex_base()
105 { __gthread_recursive_mutex_destroy(&_M_mutex); }
121 typedef __native_type* native_handle_type;
123 #ifdef __GTHREAD_MUTEX_INIT 126 mutex() noexcept =
default;
135 int __e = __gthread_mutex_lock(&_M_mutex);
139 __throw_system_error(__e);
146 return !__gthread_mutex_trylock(&_M_mutex);
153 __gthread_mutex_unlock(&_M_mutex);
158 {
return &_M_mutex; }
165 typedef __native_type* native_handle_type;
176 int __e = __gthread_recursive_mutex_lock(&_M_mutex);
180 __throw_system_error(__e);
187 return !__gthread_recursive_mutex_trylock(&_M_mutex);
194 __gthread_recursive_mutex_unlock(&_M_mutex);
199 {
return &_M_mutex; }
202 #if _GTHREAD_USE_MUTEX_TIMEDLOCK 203 template<
typename _Derived>
204 class __timed_mutex_impl
207 typedef chrono::high_resolution_clock __clock_t;
209 template<
typename _Rep,
typename _Period>
213 using chrono::steady_clock;
215 if (ratio_greater<steady_clock::period, _Period>())
217 return _M_try_lock_until(steady_clock::now() + __rt);
220 template<
typename _Duration>
228 __gthread_time_t __ts = {
229 static_cast<std::time_t
>(__s.time_since_epoch().count()),
230 static_cast<long>(__ns.count())
233 auto __mutex =
static_cast<_Derived*
>(
this)->native_handle();
234 return !__gthread_mutex_timedlock(__mutex, &__ts);
237 template<
typename _Clock,
typename _Duration>
241 auto __rtime = __atime - _Clock::now();
242 return _M_try_lock_until(__clock_t::now() + __rtime);
248 :
private __mutex_base,
public __timed_mutex_impl<timed_mutex>
251 typedef __native_type* native_handle_type;
253 timed_mutex() =
default;
254 ~timed_mutex() =
default;
256 timed_mutex(
const timed_mutex&) =
delete;
257 timed_mutex& operator=(
const timed_mutex&) =
delete;
262 int __e = __gthread_mutex_lock(&_M_mutex);
266 __throw_system_error(__e);
273 return !__gthread_mutex_trylock(&_M_mutex);
276 template <
class _Rep,
class _Period>
279 {
return _M_try_lock_for(__rtime); }
281 template <
class _Clock,
class _Duration>
284 {
return _M_try_lock_until(__atime); }
290 __gthread_mutex_unlock(&_M_mutex);
295 {
return &_M_mutex; }
299 class recursive_timed_mutex
300 :
private __recursive_mutex_base,
301 public __timed_mutex_impl<recursive_timed_mutex>
304 typedef __native_type* native_handle_type;
306 recursive_timed_mutex() =
default;
307 ~recursive_timed_mutex() =
default;
309 recursive_timed_mutex(
const recursive_timed_mutex&) =
delete;
310 recursive_timed_mutex& operator=(
const recursive_timed_mutex&) =
delete;
315 int __e = __gthread_recursive_mutex_lock(&_M_mutex);
319 __throw_system_error(__e);
326 return !__gthread_recursive_mutex_trylock(&_M_mutex);
329 template <
class _Rep,
class _Period>
332 {
return _M_try_lock_for(__rtime); }
334 template <
class _Clock,
class _Duration>
337 {
return _M_try_lock_until(__atime); }
343 __gthread_recursive_mutex_unlock(&_M_mutex);
348 {
return &_M_mutex; }
351 #endif // _GLIBCXX_HAS_GTHREADS 379 template<
typename _Mutex>
383 typedef _Mutex mutex_type;
385 explicit lock_guard(mutex_type& __m) : _M_device(__m)
386 { _M_device.lock(); }
392 { _M_device.unlock(); }
398 mutex_type& _M_device;
402 template<
typename _Mutex>
406 typedef _Mutex mutex_type;
409 : _M_device(0), _M_owns(
false)
433 template<
typename _Clock,
typename _Duration>
437 _M_owns(_M_device->try_lock_until(__atime))
440 template<
typename _Rep,
typename _Period>
444 _M_owns(_M_device->try_lock_for(__rtime))
457 : _M_device(__u._M_device), _M_owns(__u._M_owns)
480 __throw_system_error(
int(errc::operation_not_permitted));
482 __throw_system_error(
int(errc::resource_deadlock_would_occur));
494 __throw_system_error(
int(errc::operation_not_permitted));
496 __throw_system_error(
int(errc::resource_deadlock_would_occur));
499 _M_owns = _M_device->try_lock();
504 template<
typename _Clock,
typename _Duration>
509 __throw_system_error(
int(errc::operation_not_permitted));
511 __throw_system_error(
int(errc::resource_deadlock_would_occur));
514 _M_owns = _M_device->try_lock_until(__atime);
519 template<
typename _Rep,
typename _Period>
524 __throw_system_error(
int(errc::operation_not_permitted));
526 __throw_system_error(
int(errc::resource_deadlock_would_occur));
529 _M_owns = _M_device->try_lock_for(__rtime);
538 __throw_system_error(
int(errc::operation_not_permitted));
549 std::swap(_M_device, __u._M_device);
550 std::swap(_M_owns, __u._M_owns);
556 mutex_type* __ret = _M_device;
563 owns_lock()
const noexcept
566 explicit operator bool()
const noexcept
567 {
return owns_lock(); }
570 mutex()
const noexcept
571 {
return _M_device; }
574 mutex_type* _M_device;
579 template<
typename _Mutex>
584 template<
typename _Lock>
586 __try_to_lock(_Lock& __l)
589 template<
int _Idx,
bool _Continue = true>
590 struct __try_lock_impl
592 template<
typename... _Lock>
597 auto __lock = std::__try_to_lock(std::get<_Idx>(__locks));
598 if (__lock.owns_lock())
600 constexpr
bool __cont = _Idx + 2 <
sizeof...(_Lock);
601 using __try_locker = __try_lock_impl<_Idx + 1, __cont>;
602 __try_locker::__do_try_lock(__locks, __idx);
610 struct __try_lock_impl<_Idx, false>
612 template<
typename... _Lock>
617 auto __lock = std::__try_to_lock(std::get<_Idx>(__locks));
618 if (__lock.owns_lock())
636 template<
typename _Lock1,
typename _Lock2,
typename... _Lock3>
638 try_lock(_Lock1& __l1, _Lock2& __l2, _Lock3&... __l3)
641 auto __locks =
std::tie(__l1, __l2, __l3...);
642 __try_lock_impl<0>::__do_try_lock(__locks, __idx);
657 template<
typename _L1,
typename _L2,
typename... _L3>
659 lock(_L1& __l1, _L2& __l2, _L3&... __l3)
663 using __try_locker = __try_lock_impl<0,
sizeof...(_L3) != 0>;
666 auto __locks =
std::tie(__l2, __l3...);
667 __try_locker::__do_try_lock(__locks, __idx);
676 #ifdef _GLIBCXX_HAS_GTHREADS 681 typedef __gthread_once_t __native_type;
682 __native_type _M_once = __GTHREAD_ONCE_INIT;
686 constexpr
once_flag() noexcept =
default;
693 template<
typename _Callable,
typename... _Args>
698 #ifdef _GLIBCXX_HAVE_TLS 699 extern __thread
void* __once_callable;
700 extern __thread void (*__once_call)();
702 template<
typename _Callable>
706 (*(_Callable*)__once_callable)();
709 extern function<void()> __once_functor;
718 extern "C" void __once_proxy(
void);
721 template<
typename _Callable,
typename... _Args>
725 #ifdef _GLIBCXX_HAVE_TLS 726 auto __bound_functor = std::__bind_simple(std::forward<_Callable>(__f),
727 std::forward<_Args>(__args)...);
729 __once_call = &__once_call_impl<decltype(__bound_functor)>;
732 auto __callable = std::__bind_simple(std::forward<_Callable>(__f),
733 std::forward<_Args>(__args)...);
734 __once_functor = [&]() { __callable(); };
735 __set_once_functor_lock_ptr(&__functor_lock);
738 int __e = __gthread_once(&__once._M_once, &__once_proxy);
740 #ifndef _GLIBCXX_HAVE_TLS 742 __set_once_functor_lock_ptr(0);
746 __throw_system_error(__e);
748 #endif // _GLIBCXX_HAS_GTHREADS 751 _GLIBCXX_END_NAMESPACE_VERSION
753 #endif // _GLIBCXX_USE_C99_STDINT_TR1 757 #endif // _GLIBCXX_MUTEX constexpr enable_if< __is_duration< _ToDur >::value, _ToDur >::type duration_cast(const duration< _Rep, _Period > &__d)
duration_cast
void lock(_L1 &__l1, _L2 &__l2, _L3 &... __l3)
Generic lock.
int try_lock(_Lock1 &__l1, _Lock2 &__l2, _Lock3 &... __l3)
Generic try_lock.
constexpr adopt_lock_t adopt_lock
Tag used to make a scoped lock take ownership of a locked mutex.
A movable scoped lock type.
_Tp * __addressof(_Tp &__r) noexcept
Same as C++11 std::addressof.
ISO C++ entities toplevel namespace is std.
Do not acquire ownership of the mutex.
Primary class template, tuple.
void call_once(once_flag &__once, _Callable &&__f, _Args &&... __args)
call_once
constexpr defer_lock_t defer_lock
Tag used to prevent a scoped lock from acquiring ownership of a mutex.
Assume the calling thread has already obtained mutex ownership and manage it.
The standard recursive mutex type.
tuple< _Elements &... > tie(_Elements &... __args) noexcept
tie
constexpr enable_if< __is_duration< _ToDur >::value, time_point< _Clock, _ToDur > >::type time_point_cast(const time_point< _Clock, _Dur > &__t)
time_point_cast
Try to acquire ownership of the mutex without blocking.
constexpr try_to_lock_t try_to_lock
Tag used to prevent a scoped lock from blocking if a mutex is locked.