forked from dolphin-emu/dolphin
176 lines
3.9 KiB
C++
176 lines
3.9 KiB
C++
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#ifndef CONDITION_VARIABLE_H_
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#define CONDITION_VARIABLE_H_
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#define GCC_VER(x,y,z) ((x) * 10000 + (y) * 100 + (z))
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#define GCC_VERSION GCC_VER(__GNUC__, __GNUC_MINOR__, __GNUC_PATCHLEVEL__)
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#ifndef __has_include
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#define __has_include(s) 0
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#endif
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#if GCC_VERSION >= GCC_VER(4,4,0) && __GXX_EXPERIMENTAL_CXX0X__
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// GCC 4.4 provides <condition_variable>
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#include <condition_variable>
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#elif __has_include(<condition_variable>) && !ANDROID
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// clang and libc++ provide <condition_variable> on OSX. However, the version
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// of libc++ bundled with OSX 10.7 and 10.8 is buggy: it uses _ as a variable.
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//
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// We work around this issue by undefining and redefining _.
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#undef _
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#include <condition_variable>
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#define _(s) wxGetTranslation((s))
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#elif _MSC_VER >= 1700
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// The standard implementation is included since VS2012
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#include <condition_variable>
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#else
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// partial std::condition_variable implementation for win32/pthread
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#include "StdMutex.h"
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#if (_MSC_VER >= 1600) || (GCC_VERSION >= GCC_VER(4,3,0) && __GXX_EXPERIMENTAL_CXX0X__)
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#define USE_RVALUE_REFERENCES
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#endif
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#if defined(_WIN32) && defined(_M_X64)
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#define USE_CONDITION_VARIABLES
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#elif defined(_WIN32)
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#define USE_EVENTS
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#endif
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namespace std
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{
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class condition_variable
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{
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#if defined(_WIN32) && defined(USE_CONDITION_VARIABLES)
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typedef CONDITION_VARIABLE native_type;
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#elif defined(_WIN32)
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typedef HANDLE native_type;
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#else
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typedef pthread_cond_t native_type;
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#endif
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public:
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#ifdef USE_EVENTS
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typedef native_type native_handle_type;
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#else
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typedef native_type* native_handle_type;
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#endif
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condition_variable()
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{
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#if defined(_WIN32) && defined(USE_CONDITION_VARIABLES)
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InitializeConditionVariable(&m_handle);
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#elif defined(_WIN32)
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m_handle = CreateEvent(NULL, false, false, NULL);
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#else
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pthread_cond_init(&m_handle, NULL);
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#endif
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}
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~condition_variable()
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{
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#if defined(_WIN32) && !defined(USE_CONDITION_VARIABLES)
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CloseHandle(m_handle);
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#elif !defined(_WIN32)
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pthread_cond_destroy(&m_handle);
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#endif
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}
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condition_variable(const condition_variable&) /*= delete*/;
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condition_variable& operator=(const condition_variable&) /*= delete*/;
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void notify_one()
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{
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#if defined(_WIN32) && defined(USE_CONDITION_VARIABLES)
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WakeConditionVariable(&m_handle);
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#elif defined(_WIN32)
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SetEvent(m_handle);
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#else
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pthread_cond_signal(&m_handle);
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#endif
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}
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void notify_all()
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{
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#if defined(_WIN32) && defined(USE_CONDITION_VARIABLES)
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WakeAllConditionVariable(&m_handle);
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#elif defined(_WIN32)
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// TODO: broken
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SetEvent(m_handle);
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#else
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pthread_cond_broadcast(&m_handle);
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#endif
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}
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void wait(unique_lock<mutex>& lock)
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{
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#ifdef _WIN32
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#ifdef USE_SRWLOCKS
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SleepConditionVariableSRW(&m_handle, lock.mutex()->native_handle(), INFINITE, 0);
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#elif defined(USE_CONDITION_VARIABLES)
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SleepConditionVariableCS(&m_handle, lock.mutex()->native_handle(), INFINITE);
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#else
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// TODO: broken, the unlock and wait need to be atomic
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lock.unlock();
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WaitForSingleObject(m_handle, INFINITE);
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lock.lock();
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#endif
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#else
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pthread_cond_wait(&m_handle, lock.mutex()->native_handle());
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#endif
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}
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template <class Predicate>
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void wait(unique_lock<mutex>& lock, Predicate pred)
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{
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while (!pred())
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wait(lock);
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}
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//template <class Clock, class Duration>
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//cv_status wait_until(unique_lock<mutex>& lock,
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// const chrono::time_point<Clock, Duration>& abs_time);
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//template <class Clock, class Duration, class Predicate>
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// bool wait_until(unique_lock<mutex>& lock,
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// const chrono::time_point<Clock, Duration>& abs_time,
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// Predicate pred);
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//template <class Rep, class Period>
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//cv_status wait_for(unique_lock<mutex>& lock,
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// const chrono::duration<Rep, Period>& rel_time);
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//template <class Rep, class Period, class Predicate>
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// bool wait_for(unique_lock<mutex>& lock,
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// const chrono::duration<Rep, Period>& rel_time,
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// Predicate pred);
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native_handle_type native_handle()
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{
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#ifdef USE_EVENTS
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return m_handle;
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#else
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return &m_handle;
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#endif
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}
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private:
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native_type m_handle;
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};
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}
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#endif
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#endif
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