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| author | Tobias Markmann <tm@ayena.de> | 2014-10-19 20:22:58 (GMT) |
|---|---|---|
| committer | Tobias Markmann <tm@ayena.de> | 2014-10-20 13:49:33 (GMT) |
| commit | 6b22dfcf59474dd016a0355a3102a1dd3692d92c (patch) | |
| tree | 2b1fd33be433a91e81fee84fdc2bf1b52575d934 /3rdParty/Boost/src/libs/thread/src/pthread/once_atomic.cpp | |
| parent | 38b0cb785fea8eae5e48fae56440695fdfd10ee1 (diff) | |
| download | swift-contrib-6b22dfcf59474dd016a0355a3102a1dd3692d92c.zip swift-contrib-6b22dfcf59474dd016a0355a3102a1dd3692d92c.tar.bz2 | |
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/libs/thread/src/pthread/once_atomic.cpp')
| -rw-r--r-- | 3rdParty/Boost/src/libs/thread/src/pthread/once_atomic.cpp | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/3rdParty/Boost/src/libs/thread/src/pthread/once_atomic.cpp b/3rdParty/Boost/src/libs/thread/src/pthread/once_atomic.cpp new file mode 100644 index 0000000..b7ee1dc --- /dev/null +++ b/3rdParty/Boost/src/libs/thread/src/pthread/once_atomic.cpp @@ -0,0 +1,90 @@ +// (C) Copyright 2013 Andrey Semashev +// (C) Copyright 2013 Vicente J. Botet Escriba +// +// 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) + +//#define __STDC_CONSTANT_MACROS +#include <boost/thread/detail/config.hpp> +#include <boost/thread/once.hpp> +#include <boost/thread/pthread/pthread_mutex_scoped_lock.hpp> +#include <boost/assert.hpp> +#include <boost/static_assert.hpp> +#include <boost/atomic.hpp> +#include <boost/memory_order.hpp> +#include <pthread.h> + +namespace boost +{ + namespace thread_detail + { + + enum flag_states + { + uninitialized, in_progress, initialized + }; + + +#ifndef BOOST_THREAD_PROVIDES_ONCE_CXX11 + BOOST_STATIC_ASSERT_MSG(sizeof(atomic_int_type) == sizeof(atomic_type), "Boost.Thread: unsupported platform"); +#endif + + static pthread_mutex_t once_mutex = PTHREAD_MUTEX_INITIALIZER; + static pthread_cond_t once_cv = PTHREAD_COND_INITIALIZER; + + BOOST_THREAD_DECL bool enter_once_region(once_flag& flag) BOOST_NOEXCEPT + { + atomic_type& f = get_atomic_storage(flag); + if (f.load(memory_order_acquire) != initialized) + { + pthread::pthread_mutex_scoped_lock lk(&once_mutex); + if (f.load(memory_order_acquire) != initialized) + { + while (true) + { + atomic_int_type expected = uninitialized; + if (f.compare_exchange_strong(expected, in_progress, memory_order_acq_rel, memory_order_acquire)) + { + // We have set the flag to in_progress + return true; + } + else if (expected == initialized) + { + // Another thread managed to complete the initialization + return false; + } + else + { + // Wait until the initialization is complete + //pthread::pthread_mutex_scoped_lock lk(&once_mutex); + BOOST_VERIFY(!pthread_cond_wait(&once_cv, &once_mutex)); + } + } + } + } + return false; + } + + BOOST_THREAD_DECL void commit_once_region(once_flag& flag) BOOST_NOEXCEPT + { + atomic_type& f = get_atomic_storage(flag); + { + pthread::pthread_mutex_scoped_lock lk(&once_mutex); + f.store(initialized, memory_order_release); + } + BOOST_VERIFY(!pthread_cond_broadcast(&once_cv)); + } + + BOOST_THREAD_DECL void rollback_once_region(once_flag& flag) BOOST_NOEXCEPT + { + atomic_type& f = get_atomic_storage(flag); + { + pthread::pthread_mutex_scoped_lock lk(&once_mutex); + f.store(uninitialized, memory_order_release); + } + BOOST_VERIFY(!pthread_cond_broadcast(&once_cv)); + } + + } // namespace thread_detail + +} // namespace boost |