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Diffstat (limited to 'lib/asio/detail/std_event.hpp')
-rw-r--r-- | lib/asio/detail/std_event.hpp | 176 |
1 files changed, 0 insertions, 176 deletions
diff --git a/lib/asio/detail/std_event.hpp b/lib/asio/detail/std_event.hpp deleted file mode 100644 index 5639ecd..0000000 --- a/lib/asio/detail/std_event.hpp +++ /dev/null @@ -1,176 +0,0 @@ -// -// detail/std_event.hpp -// ~~~~~~~~~~~~~~~~~~~~ -// -// Copyright (c) 2003-2018 Christopher M. Kohlhoff (chris at kohlhoff dot com) -// -// Distributed under the Boost Software License, Version 1.0. (See accompanying -// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -// - -#ifndef ASIO_DETAIL_STD_EVENT_HPP -#define ASIO_DETAIL_STD_EVENT_HPP - -#if defined(_MSC_VER) && (_MSC_VER >= 1200) -# pragma once -#endif // defined(_MSC_VER) && (_MSC_VER >= 1200) - -#include "asio/detail/config.hpp" - -#if defined(ASIO_HAS_STD_MUTEX_AND_CONDVAR) - -#include <chrono> -#include <condition_variable> -#include "asio/detail/assert.hpp" -#include "asio/detail/noncopyable.hpp" - -#include "asio/detail/push_options.hpp" - -namespace asio { -namespace detail { - -class std_event - : private noncopyable -{ -public: - // Constructor. - std_event() - : state_(0) - { - } - - // Destructor. - ~std_event() - { - } - - // Signal the event. (Retained for backward compatibility.) - template <typename Lock> - void signal(Lock& lock) - { - this->signal_all(lock); - } - - // Signal all waiters. - template <typename Lock> - void signal_all(Lock& lock) - { - ASIO_ASSERT(lock.locked()); - (void)lock; - state_ |= 1; - cond_.notify_all(); - } - - // Unlock the mutex and signal one waiter. - template <typename Lock> - void unlock_and_signal_one(Lock& lock) - { - ASIO_ASSERT(lock.locked()); - state_ |= 1; - bool have_waiters = (state_ > 1); - lock.unlock(); - if (have_waiters) - cond_.notify_one(); - } - - // If there's a waiter, unlock the mutex and signal it. - template <typename Lock> - bool maybe_unlock_and_signal_one(Lock& lock) - { - ASIO_ASSERT(lock.locked()); - state_ |= 1; - if (state_ > 1) - { - lock.unlock(); - cond_.notify_one(); - return true; - } - return false; - } - - // Reset the event. - template <typename Lock> - void clear(Lock& lock) - { - ASIO_ASSERT(lock.locked()); - (void)lock; - state_ &= ~std::size_t(1); - } - - // Wait for the event to become signalled. - template <typename Lock> - void wait(Lock& lock) - { - ASIO_ASSERT(lock.locked()); - unique_lock_adapter u_lock(lock); - while ((state_ & 1) == 0) - { - waiter w(state_); - cond_.wait(u_lock.unique_lock_); - } - } - - // Timed wait for the event to become signalled. - template <typename Lock> - bool wait_for_usec(Lock& lock, long usec) - { - ASIO_ASSERT(lock.locked()); - unique_lock_adapter u_lock(lock); - if ((state_ & 1) == 0) - { - waiter w(state_); - cond_.wait_for(u_lock.unique_lock_, std::chrono::microseconds(usec)); - } - return (state_ & 1) != 0; - } - -private: - // Helper class to temporarily adapt a scoped_lock into a unique_lock so that - // it can be passed to std::condition_variable::wait(). - struct unique_lock_adapter - { - template <typename Lock> - explicit unique_lock_adapter(Lock& lock) - : unique_lock_(lock.mutex().mutex_, std::adopt_lock) - { - } - - ~unique_lock_adapter() - { - unique_lock_.release(); - } - - std::unique_lock<std::mutex> unique_lock_; - }; - - // Helper to increment and decrement the state to track outstanding waiters. - class waiter - { - public: - explicit waiter(std::size_t& state) - : state_(state) - { - state_ += 2; - } - - ~waiter() - { - state_ -= 2; - } - - private: - std::size_t& state_; - }; - - std::condition_variable cond_; - std::size_t state_; -}; - -} // namespace detail -} // namespace asio - -#include "asio/detail/pop_options.hpp" - -#endif // defined(ASIO_HAS_STD_MUTEX_AND_CONDVAR) - -#endif // ASIO_DETAIL_STD_EVENT_HPP |