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authorTobias Markmann <tm@ayena.de>2014-10-19 20:22:58 (GMT)
committerTobias Markmann <tm@ayena.de>2014-10-20 13:49:33 (GMT)
commit6b22dfcf59474dd016a0355a3102a1dd3692d92c (patch)
tree2b1fd33be433a91e81fee84fdc2bf1b52575d934 /3rdParty/Boost/src/boost/asio/detail/std_event.hpp
parent38b0cb785fea8eae5e48fae56440695fdfd10ee1 (diff)
downloadswift-6b22dfcf59474dd016a0355a3102a1dd3692d92c.zip
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Update Boost in 3rdParty to version 1.56.0.
This updates Boost in our 3rdParty directory to version 1.56.0. Updated our update.sh script to stop on error. Changed error reporting in SwiftTools/CrashReporter.cpp to SWIFT_LOG due to missing include of <iostream> with newer Boost. Change-Id: I4b35c77de951333979a524097f35f5f83d325edc
Diffstat (limited to '3rdParty/Boost/src/boost/asio/detail/std_event.hpp')
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diff --git a/3rdParty/Boost/src/boost/asio/detail/std_event.hpp b/3rdParty/Boost/src/boost/asio/detail/std_event.hpp
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+//
+// detail/std_event.hpp
+// ~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2014 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 BOOST_ASIO_DETAIL_STD_EVENT_HPP
+#define BOOST_ASIO_DETAIL_STD_EVENT_HPP
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1200)
+# pragma once
+#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
+
+#include <boost/asio/detail/config.hpp>
+
+#if defined(BOOST_ASIO_HAS_STD_MUTEX_AND_CONDVAR)
+
+#include <chrono>
+#include <condition_variable>
+#include <boost/asio/detail/assert.hpp>
+#include <boost/asio/detail/noncopyable.hpp>
+
+#include <boost/asio/detail/push_options.hpp>
+
+namespace boost {
+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)
+ {
+ BOOST_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)
+ {
+ BOOST_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)
+ {
+ BOOST_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)
+ {
+ BOOST_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)
+ {
+ BOOST_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)
+ {
+ BOOST_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
+} // namespace boost
+
+#include <boost/asio/detail/pop_options.hpp>
+
+#endif // defined(BOOST_ASIO_HAS_STD_MUTEX_AND_CONDVAR)
+
+#endif // BOOST_ASIO_DETAIL_STD_EVENT_HPP