diff options
Diffstat (limited to 'contrib/src/boost/smart_ptr/detail/yield_k.hpp')
-rw-r--r-- | contrib/src/boost/smart_ptr/detail/yield_k.hpp | 354 |
1 files changed, 177 insertions, 177 deletions
diff --git a/contrib/src/boost/smart_ptr/detail/yield_k.hpp b/contrib/src/boost/smart_ptr/detail/yield_k.hpp index 44d1836..8f146b9 100644 --- a/contrib/src/boost/smart_ptr/detail/yield_k.hpp +++ b/contrib/src/boost/smart_ptr/detail/yield_k.hpp @@ -1,177 +1,177 @@ -#ifndef BOOST_SMART_PTR_DETAIL_YIELD_K_HPP_INCLUDED -#define BOOST_SMART_PTR_DETAIL_YIELD_K_HPP_INCLUDED - -// MS compatible compilers support #pragma once - -#if defined(_MSC_VER) && (_MSC_VER >= 1020) -# pragma once -#endif - -// -// yield_k.hpp -// -// Copyright (c) 2008 Peter Dimov -// Copyright (c) Microsoft Corporation 2014 -// -// void yield( unsigned k ); -// -// Typical use: -// -// for( unsigned k = 0; !try_lock(); ++k ) yield( k ); -// -// 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 -// - -#include <boost/config.hpp> -#include <boost/predef.h> - -#if BOOST_PLAT_WINDOWS_RUNTIME -#include <thread> -#endif - -// BOOST_SMT_PAUSE - -#if defined(_MSC_VER) && _MSC_VER >= 1310 && ( defined(_M_IX86) || defined(_M_X64) ) - -extern "C" void _mm_pause(); - -#define BOOST_SMT_PAUSE _mm_pause(); - -#elif defined(__GNUC__) && ( defined(__i386__) || defined(__x86_64__) ) - -#define BOOST_SMT_PAUSE __asm__ __volatile__( "rep; nop" : : : "memory" ); - -#endif - -// - -#if defined( WIN32 ) || defined( _WIN32 ) || defined( __WIN32__ ) || defined( __CYGWIN__ ) - -#if defined( BOOST_USE_WINDOWS_H ) -# include <windows.h> -#endif - -namespace boost -{ - -namespace detail -{ - -#if !defined( BOOST_USE_WINDOWS_H ) && !BOOST_PLAT_WINDOWS_RUNTIME -#if !BOOST_COMP_CLANG || !defined __MINGW32__ - extern "C" void __stdcall Sleep( unsigned long ms ); -#else -#include <_mingw.h> -#if !defined __MINGW64_VERSION_MAJOR - extern "C" void __stdcall Sleep( unsigned long ms ); -#else - extern "C" __declspec(dllimport) void __stdcall Sleep( unsigned long ms ); -#endif -#endif -#endif - -inline void yield( unsigned k ) -{ - if( k < 4 ) - { - } -#if defined( BOOST_SMT_PAUSE ) - else if( k < 16 ) - { - BOOST_SMT_PAUSE - } -#endif -#if !BOOST_PLAT_WINDOWS_RUNTIME - else if( k < 32 ) - { - Sleep( 0 ); - } - else - { - Sleep( 1 ); - } -#else - else - { - // Sleep isn't supported on the Windows Runtime. - std::this_thread::yield(); - } -#endif -} - -} // namespace detail - -} // namespace boost - -#elif defined( BOOST_HAS_PTHREADS ) - -#ifndef _AIX -#include <sched.h> -#else - // AIX's sched.h defines ::var which sometimes conflicts with Lambda's var - extern "C" int sched_yield(void); -#endif - -#include <time.h> - -namespace boost -{ - -namespace detail -{ - -inline void yield( unsigned k ) -{ - if( k < 4 ) - { - } -#if defined( BOOST_SMT_PAUSE ) - else if( k < 16 ) - { - BOOST_SMT_PAUSE - } -#endif - else if( k < 32 || k & 1 ) - { - sched_yield(); - } - else - { - // g++ -Wextra warns on {} or {0} - struct timespec rqtp = { 0, 0 }; - - // POSIX says that timespec has tv_sec and tv_nsec - // But it doesn't guarantee order or placement - - rqtp.tv_sec = 0; - rqtp.tv_nsec = 1000; - - nanosleep( &rqtp, 0 ); - } -} - -} // namespace detail - -} // namespace boost - -#else - -namespace boost -{ - -namespace detail -{ - -inline void yield( unsigned ) -{ -} - -} // namespace detail - -} // namespace boost - -#endif - -#endif // #ifndef BOOST_SMART_PTR_DETAIL_YIELD_K_HPP_INCLUDED +#ifndef BOOST_SMART_PTR_DETAIL_YIELD_K_HPP_INCLUDED
+#define BOOST_SMART_PTR_DETAIL_YIELD_K_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+//
+// yield_k.hpp
+//
+// Copyright (c) 2008 Peter Dimov
+// Copyright (c) Microsoft Corporation 2014
+//
+// void yield( unsigned k );
+//
+// Typical use:
+//
+// for( unsigned k = 0; !try_lock(); ++k ) yield( k );
+//
+// 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
+//
+
+#include <boost/config.hpp>
+#include <boost/predef.h>
+
+#if BOOST_PLAT_WINDOWS_RUNTIME
+#include <thread>
+#endif
+
+// BOOST_SMT_PAUSE
+
+#if defined(_MSC_VER) && _MSC_VER >= 1310 && ( defined(_M_IX86) || defined(_M_X64) )
+
+extern "C" void _mm_pause();
+
+#define BOOST_SMT_PAUSE _mm_pause();
+
+#elif defined(__GNUC__) && ( defined(__i386__) || defined(__x86_64__) )
+
+#define BOOST_SMT_PAUSE __asm__ __volatile__( "rep; nop" : : : "memory" );
+
+#endif
+
+//
+
+#if defined( WIN32 ) || defined( _WIN32 ) || defined( __WIN32__ ) || defined( __CYGWIN__ )
+
+#if defined( BOOST_USE_WINDOWS_H )
+# include <windows.h>
+#endif
+
+namespace boost
+{
+
+namespace detail
+{
+
+#if !defined( BOOST_USE_WINDOWS_H ) && !BOOST_PLAT_WINDOWS_RUNTIME
+#if !BOOST_COMP_CLANG || !defined __MINGW32__
+ extern "C" void __stdcall Sleep( unsigned long ms );
+#else
+#include <_mingw.h>
+#if !defined __MINGW64_VERSION_MAJOR
+ extern "C" void __stdcall Sleep( unsigned long ms );
+#else
+ extern "C" __declspec(dllimport) void __stdcall Sleep( unsigned long ms );
+#endif
+#endif
+#endif
+
+inline void yield( unsigned k )
+{
+ if( k < 4 )
+ {
+ }
+#if defined( BOOST_SMT_PAUSE )
+ else if( k < 16 )
+ {
+ BOOST_SMT_PAUSE
+ }
+#endif
+#if !BOOST_PLAT_WINDOWS_RUNTIME
+ else if( k < 32 )
+ {
+ Sleep( 0 );
+ }
+ else
+ {
+ Sleep( 1 );
+ }
+#else
+ else
+ {
+ // Sleep isn't supported on the Windows Runtime.
+ std::this_thread::yield();
+ }
+#endif
+}
+
+} // namespace detail
+
+} // namespace boost
+
+#elif defined( BOOST_HAS_PTHREADS )
+
+#ifndef _AIX
+#include <sched.h>
+#else
+ // AIX's sched.h defines ::var which sometimes conflicts with Lambda's var
+ extern "C" int sched_yield(void);
+#endif
+
+#include <time.h>
+
+namespace boost
+{
+
+namespace detail
+{
+
+inline void yield( unsigned k )
+{
+ if( k < 4 )
+ {
+ }
+#if defined( BOOST_SMT_PAUSE )
+ else if( k < 16 )
+ {
+ BOOST_SMT_PAUSE
+ }
+#endif
+ else if( k < 32 || k & 1 )
+ {
+ sched_yield();
+ }
+ else
+ {
+ // g++ -Wextra warns on {} or {0}
+ struct timespec rqtp = { 0, 0 };
+
+ // POSIX says that timespec has tv_sec and tv_nsec
+ // But it doesn't guarantee order or placement
+
+ rqtp.tv_sec = 0;
+ rqtp.tv_nsec = 1000;
+
+ nanosleep( &rqtp, 0 );
+ }
+}
+
+} // namespace detail
+
+} // namespace boost
+
+#else
+
+namespace boost
+{
+
+namespace detail
+{
+
+inline void yield( unsigned )
+{
+}
+
+} // namespace detail
+
+} // namespace boost
+
+#endif
+
+#endif // #ifndef BOOST_SMART_PTR_DETAIL_YIELD_K_HPP_INCLUDED
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