forked from OSchip/llvm-project
250 lines
6.7 KiB
C++
250 lines
6.7 KiB
C++
// -*- C++ -*-
|
|
//===---------------------- condition_variable ----------------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef _LIBCPP_CONDITION_VARIABLE
|
|
#define _LIBCPP_CONDITION_VARIABLE
|
|
|
|
/*
|
|
condition_variable synopsis
|
|
|
|
namespace std
|
|
{
|
|
|
|
enum class cv_status { no_timeout, timeout };
|
|
|
|
class condition_variable
|
|
{
|
|
public:
|
|
condition_variable();
|
|
~condition_variable();
|
|
|
|
condition_variable(const condition_variable&) = delete;
|
|
condition_variable& operator=(const condition_variable&) = delete;
|
|
|
|
void notify_one();
|
|
void notify_all();
|
|
|
|
void wait(unique_lock<mutex>& lock);
|
|
template <class Predicate>
|
|
void wait(unique_lock<mutex>& lock, Predicate pred);
|
|
|
|
template <class Clock, class Duration>
|
|
cv_status
|
|
wait_until(unique_lock<mutex>& lock,
|
|
const chrono::time_point<Clock, Duration>& abs_time);
|
|
|
|
template <class Clock, class Duration, class Predicate>
|
|
bool
|
|
wait_until(unique_lock<mutex>& lock,
|
|
const chrono::time_point<Clock, Duration>& abs_time,
|
|
Predicate pred);
|
|
|
|
template <class Rep, class Period>
|
|
cv_status
|
|
wait_for(unique_lock<mutex>& lock,
|
|
const chrono::duration<Rep, Period>& rel_time);
|
|
|
|
template <class Rep, class Period, class Predicate>
|
|
bool
|
|
wait_for(unique_lock<mutex>& lock,
|
|
const chrono::duration<Rep, Period>& rel_time,
|
|
Predicate pred);
|
|
|
|
typedef pthread_cond_t* native_handle_type;
|
|
native_handle_type native_handle();
|
|
};
|
|
|
|
class condition_variable_any
|
|
{
|
|
public:
|
|
condition_variable_any();
|
|
~condition_variable_any();
|
|
|
|
condition_variable_any(const condition_variable_any&) = delete;
|
|
condition_variable_any& operator=(const condition_variable_any&) = delete;
|
|
|
|
void notify_one();
|
|
void notify_all();
|
|
|
|
template <class Lock>
|
|
void wait(Lock& lock);
|
|
template <class Lock, class Predicate>
|
|
void wait(Lock& lock, Predicate pred);
|
|
|
|
template <class Lock, class Clock, class Duration>
|
|
cv_status
|
|
wait_until(Lock& lock,
|
|
const chrono::time_point<Clock, Duration>& abs_time);
|
|
|
|
template <class Lock, class Clock, class Duration, class Predicate>
|
|
bool
|
|
wait_until(Lock& lock,
|
|
const chrono::time_point<Clock, Duration>& abs_time,
|
|
Predicate pred);
|
|
|
|
template <class Lock, class Rep, class Period>
|
|
cv_status
|
|
wait_for(Lock& lock,
|
|
const chrono::duration<Rep, Period>& rel_time);
|
|
|
|
template <class Lock, class Rep, class Period, class Predicate>
|
|
bool
|
|
wait_for(Lock& lock,
|
|
const chrono::duration<Rep, Period>& rel_time,
|
|
Predicate pred);
|
|
};
|
|
|
|
} // std
|
|
|
|
*/
|
|
|
|
#include <__config>
|
|
#include <__mutex_base>
|
|
#include <memory>
|
|
|
|
#pragma GCC system_header
|
|
|
|
_LIBCPP_BEGIN_NAMESPACE_STD
|
|
|
|
class condition_variable_any
|
|
{
|
|
condition_variable __cv_;
|
|
shared_ptr<mutex> __mut_;
|
|
public:
|
|
condition_variable_any();
|
|
|
|
void notify_one();
|
|
void notify_all();
|
|
|
|
template <class _Lock>
|
|
void wait(_Lock& __lock);
|
|
template <class _Lock, class _Predicate>
|
|
void wait(_Lock& __lock, _Predicate __pred);
|
|
|
|
template <class _Lock, class _Clock, class _Duration>
|
|
cv_status
|
|
wait_until(_Lock& __lock,
|
|
const chrono::time_point<_Clock, _Duration>& __t);
|
|
|
|
template <class _Lock, class _Clock, class _Duration, class _Predicate>
|
|
bool
|
|
wait_until(_Lock& __lock,
|
|
const chrono::time_point<_Clock, _Duration>& __t,
|
|
_Predicate __pred);
|
|
|
|
template <class _Lock, class _Rep, class _Period>
|
|
cv_status
|
|
wait_for(_Lock& __lock,
|
|
const chrono::duration<_Rep, _Period>& __d);
|
|
|
|
template <class _Lock, class _Rep, class _Period, class _Predicate>
|
|
bool
|
|
wait_for(_Lock& __lock,
|
|
const chrono::duration<_Rep, _Period>& __d,
|
|
_Predicate __pred);
|
|
};
|
|
|
|
inline
|
|
condition_variable_any::condition_variable_any()
|
|
: __mut_(make_shared<mutex>()) {}
|
|
|
|
inline
|
|
void
|
|
condition_variable_any::notify_one()
|
|
{
|
|
{lock_guard<mutex> _(*__mut_);}
|
|
__cv_.notify_one();
|
|
}
|
|
|
|
inline
|
|
void
|
|
condition_variable_any::notify_all()
|
|
{
|
|
{lock_guard<mutex> _(*__mut_);}
|
|
__cv_.notify_all();
|
|
}
|
|
|
|
struct __lock_external
|
|
{
|
|
template <class _Lock>
|
|
void operator()(_Lock* __m) {__m->lock();}
|
|
};
|
|
|
|
template <class _Lock>
|
|
void
|
|
condition_variable_any::wait(_Lock& __lock)
|
|
{
|
|
shared_ptr<mutex> __mut = __mut_;
|
|
unique_lock<mutex> __lk(*__mut);
|
|
__lock.unlock();
|
|
unique_ptr<_Lock, __lock_external> __(&__lock);
|
|
lock_guard<unique_lock<mutex> > _(__lk, adopt_lock);
|
|
__cv_.wait(__lk);
|
|
} // __mut_.unlock(), __lock.lock()
|
|
|
|
template <class _Lock, class _Predicate>
|
|
inline
|
|
void
|
|
condition_variable_any::wait(_Lock& __lock, _Predicate __pred)
|
|
{
|
|
while (!__pred())
|
|
wait(__lock);
|
|
}
|
|
|
|
template <class _Lock, class _Clock, class _Duration>
|
|
cv_status
|
|
condition_variable_any::wait_until(_Lock& __lock,
|
|
const chrono::time_point<_Clock, _Duration>& __t)
|
|
{
|
|
shared_ptr<mutex> __mut = __mut_;
|
|
unique_lock<mutex> __lk(*__mut);
|
|
__lock.unlock();
|
|
unique_ptr<_Lock, __lock_external> __(&__lock);
|
|
lock_guard<unique_lock<mutex> > _(__lk, adopt_lock);
|
|
return __cv_.wait_until(__lk, __t);
|
|
} // __mut_.unlock(), __lock.lock()
|
|
|
|
template <class _Lock, class _Clock, class _Duration, class _Predicate>
|
|
inline
|
|
bool
|
|
condition_variable_any::wait_until(_Lock& __lock,
|
|
const chrono::time_point<_Clock, _Duration>& __t,
|
|
_Predicate __pred)
|
|
{
|
|
while (!__pred())
|
|
if (wait_until(__lock, __t) == cv_status::timeout)
|
|
return __pred();
|
|
return true;
|
|
}
|
|
|
|
template <class _Lock, class _Rep, class _Period>
|
|
inline
|
|
cv_status
|
|
condition_variable_any::wait_for(_Lock& __lock,
|
|
const chrono::duration<_Rep, _Period>& __d)
|
|
{
|
|
return wait_until(__lock, chrono::monotonic_clock::now() + __d);
|
|
}
|
|
|
|
template <class _Lock, class _Rep, class _Period, class _Predicate>
|
|
inline
|
|
bool
|
|
condition_variable_any::wait_for(_Lock& __lock,
|
|
const chrono::duration<_Rep, _Period>& __d,
|
|
_Predicate __pred)
|
|
{
|
|
return wait_until(__lock, chrono::monotonic_clock::now() + __d,
|
|
_STD::move(__pred));
|
|
}
|
|
|
|
_LIBCPP_END_NAMESPACE_STD
|
|
|
|
#endif // _LIBCPP_CONDITION_VARIABLE
|