Swiftdiff options
Diffstat (limited to '3rdParty/Boost/src/boost/thread/win32/once.hpp')
| -rw-r--r-- | 3rdParty/Boost/src/boost/thread/win32/once.hpp | 55 |
1 files changed, 40 insertions, 15 deletions
diff --git a/3rdParty/Boost/src/boost/thread/win32/once.hpp b/3rdParty/Boost/src/boost/thread/win32/once.hpp index e1b1843..3066b50 100644 --- a/3rdParty/Boost/src/boost/thread/win32/once.hpp +++ b/3rdParty/Boost/src/boost/thread/win32/once.hpp @@ -3,8 +3,9 @@ // once.hpp // -// (C) Copyright 2005-7 Anthony Williams +// (C) Copyright 2005-7 Anthony Williams // (C) Copyright 2005 John Maddock +// (C) Copyright 2011-2012 Vicente J. Botet Escriba // // Distributed under the Boost Software License, Version 1.0. (See // accompanying file LICENSE_1_0.txt or copy at @@ -30,6 +31,25 @@ namespace std namespace boost { +#ifdef BOOST_THREAD_PROVIDES_ONCE_CXX11 + + struct once_flag + { + BOOST_THREAD_NO_COPYABLE(once_flag) + BOOST_CONSTEXPR once_flag() BOOST_NOEXCEPT + : status(0), count(0) + {} + private: + long status; + long count; + template<typename Function> + friend + void call_once(once_flag& flag,Function f); + }; + +#define BOOST_ONCE_INIT once_flag() +#else // BOOST_THREAD_PROVIDES_ONCE_CXX11 + struct once_flag { long status; @@ -37,6 +57,7 @@ namespace boost }; #define BOOST_ONCE_INIT {0,0} +#endif // BOOST_THREAD_PROVIDES_ONCE_CXX11 namespace detail { @@ -71,29 +92,29 @@ namespace boost #else static const once_char_type fixed_mutex_name[]="Local\\{C15730E2-145C-4c5e-B005-3BC753F42475}-once-flag"; #endif - BOOST_STATIC_ASSERT(sizeof(fixed_mutex_name) == + BOOST_STATIC_ASSERT(sizeof(fixed_mutex_name) == (sizeof(once_char_type)*(once_mutex_name_fixed_length+1))); - + std::memcpy(mutex_name,fixed_mutex_name,sizeof(fixed_mutex_name)); - detail::int_to_string(reinterpret_cast<std::ptrdiff_t>(flag_address), + detail::int_to_string(reinterpret_cast<std::ptrdiff_t>(flag_address), mutex_name + once_mutex_name_fixed_length); - detail::int_to_string(win32::GetCurrentProcessId(), + detail::int_to_string(win32::GetCurrentProcessId(), mutex_name + once_mutex_name_fixed_length + sizeof(void*)*2); } - + inline void* open_once_event(once_char_type* mutex_name,void* flag_address) { if(!*mutex_name) { name_once_mutex(mutex_name,flag_address); } - -#ifdef BOOST_NO_ANSI_APIS + +#ifdef BOOST_NO_ANSI_APIS return ::boost::detail::win32::OpenEventW( #else return ::boost::detail::win32::OpenEventA( #endif - ::boost::detail::win32::synchronize | + ::boost::detail::win32::synchronize | ::boost::detail::win32::event_modify_state, false, mutex_name); @@ -105,7 +126,7 @@ namespace boost { name_once_mutex(mutex_name,flag_address); } -#ifdef BOOST_NO_ANSI_APIS +#ifdef BOOST_NO_ANSI_APIS return ::boost::detail::win32::CreateEventW( #else return ::boost::detail::win32::CreateEventA( @@ -115,7 +136,7 @@ namespace boost mutex_name); } } - + template<typename Function> void call_once(once_flag& flag,Function f) @@ -136,7 +157,9 @@ namespace boost status=BOOST_INTERLOCKED_COMPARE_EXCHANGE(&flag.status,running_value,0); if(!status) { - try +#ifndef BOOST_NO_EXCEPTIONS + try // BOOST_NO_EXCEPTIONS protected +#endif { if(!event_handle) { @@ -153,7 +176,7 @@ namespace boost counted=true; } BOOST_INTERLOCKED_EXCHANGE(&flag.status,function_complete_flag_value); - if(!event_handle && + if(!event_handle && (::boost::detail::interlocked_read_acquire(&flag.count)>1)) { event_handle=detail::create_once_event(mutex_name,&flag); @@ -164,7 +187,8 @@ namespace boost } break; } - catch(...) +#ifndef BOOST_NO_EXCEPTIONS + catch(...) // BOOST_NO_EXCEPTIONS protected { BOOST_INTERLOCKED_EXCHANGE(&flag.status,0); if(!event_handle) @@ -175,8 +199,9 @@ namespace boost { ::boost::detail::win32::SetEvent(event_handle); } - throw; + throw; // BOOST_NO_EXCEPTIONS protected } +#endif } if(!counted) |