30 #ifndef _GLIBCXX_MUTEX_H 31 #define _GLIBCXX_MUTEX_H 1 33 #pragma GCC system_header 35 #if __cplusplus < 201103L 41 #include <bits/gthr.h> 43 namespace std _GLIBCXX_VISIBILITY(default)
45 _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 mutex :
private __mutex_base
86 typedef __native_type* native_handle_type;
88 #ifdef __GTHREAD_MUTEX_INIT 91 mutex() noexcept =
default;
100 int __e = __gthread_mutex_lock(&_M_mutex);
104 __throw_system_error(__e);
111 return !__gthread_mutex_trylock(&_M_mutex);
118 __gthread_mutex_unlock(&_M_mutex);
122 native_handle() noexcept
123 {
return &_M_mutex; }
129 using timespec = __gthread_time_t;
134 #ifndef __GTHREAD_COND_INIT 135 __GTHREAD_COND_INIT_FUNCTION(&_M_cond);
141 int __e __attribute__((__unused__)) = __gthread_cond_destroy(&_M_cond);
142 __glibcxx_assert(__e != EBUSY);
145 __condvar(
const __condvar&) =
delete;
146 __condvar&
operator=(
const __condvar&) =
delete;
148 __gthread_cond_t* native_handle() noexcept {
return &_M_cond; }
152 wait(mutex& __m) noexcept
154 int __e __attribute__((__unused__))
155 = __gthread_cond_wait(&_M_cond, __m.native_handle());
156 __glibcxx_assert(__e == 0);
160 wait_until(mutex& __m, timespec& __abs_time) noexcept
162 __gthread_cond_timedwait(&_M_cond, __m.native_handle(), &__abs_time);
165 #ifdef _GLIBCXX_USE_PTHREAD_COND_CLOCKWAIT 167 wait_until(mutex& __m, clockid_t __clock, timespec& __abs_time) noexcept
169 pthread_cond_clockwait(&_M_cond, __m.native_handle(), __clock,
175 notify_one() noexcept
177 int __e __attribute__((__unused__)) = __gthread_cond_signal(&_M_cond);
178 __glibcxx_assert(__e == 0);
182 notify_all() noexcept
184 int __e __attribute__((__unused__)) = __gthread_cond_broadcast(&_M_cond);
185 __glibcxx_assert(__e == 0);
189 #ifdef __GTHREAD_COND_INIT 190 __gthread_cond_t _M_cond = __GTHREAD_COND_INIT;
192 __gthread_cond_t _M_cond;
196 #endif // _GLIBCXX_HAS_GTHREADS 222 template<
typename _Mutex>
226 typedef _Mutex mutex_type;
228 explicit lock_guard(mutex_type& __m) : _M_device(__m)
229 { _M_device.lock(); }
235 { _M_device.unlock(); }
241 mutex_type& _M_device;
245 _GLIBCXX_END_NAMESPACE_VERSION
248 #endif // _GLIBCXX_MUTEX_H constexpr try_to_lock_t try_to_lock
Tag used to prevent a scoped lock from blocking if a mutex is locked.
Assume the calling thread has already obtained mutex ownership and manage it.
Try to acquire ownership of the mutex without blocking.
constexpr defer_lock_t defer_lock
Tag used to prevent a scoped lock from acquiring ownership of a mutex.
ISO C++ entities toplevel namespace is std.
auto_ptr & operator=(auto_ptr &__a)
auto_ptr assignment operator.
A simple scoped lock type.
Do not acquire ownership of the mutex.
constexpr adopt_lock_t adopt_lock
Tag used to make a scoped lock take ownership of a locked mutex.