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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/smart_ptr/detail/atomic_count.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/smart_ptr/detail/atomic_count.hpp')
-rw-r--r--3rdParty/Boost/src/boost/smart_ptr/detail/atomic_count.hpp95
1 files changed, 36 insertions, 59 deletions
diff --git a/3rdParty/Boost/src/boost/smart_ptr/detail/atomic_count.hpp b/3rdParty/Boost/src/boost/smart_ptr/detail/atomic_count.hpp
index cc44ac2..8aefd44 100644
--- a/3rdParty/Boost/src/boost/smart_ptr/detail/atomic_count.hpp
+++ b/3rdParty/Boost/src/boost/smart_ptr/detail/atomic_count.hpp
@@ -11,10 +11,11 @@
// boost/detail/atomic_count.hpp - thread/SMP safe reference counter
//
// Copyright (c) 2001, 2002 Peter Dimov and Multi Media Ltd.
+// Copyright (c) 2013 Peter Dimov
//
-// 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)
+// 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
//
// typedef <implementation-defined> boost::detail::atomic_count;
//
@@ -27,92 +28,68 @@
// a;
//
// Returns: (long) the current value of a
+// Memory Ordering: acquire
//
// ++a;
//
// Effects: Atomically increments the value of a
// Returns: (long) the new value of a
+// Memory Ordering: acquire/release
//
// --a;
//
// Effects: Atomically decrements the value of a
// Returns: (long) the new value of a
-//
-// Important note: when --a returns zero, it must act as a
-// read memory barrier (RMB); i.e. the calling thread must
-// have a synchronized view of the memory
-//
-// On Intel IA-32 (x86) memory is always synchronized, so this
-// is not a problem.
-//
-// On many architectures the atomic instructions already act as
-// a memory barrier.
-//
-// This property is necessary for proper reference counting, since
-// a thread can update the contents of a shared object, then
-// release its reference, and another thread may immediately
-// release the last reference causing object destruction.
-//
-// The destructor needs to have a synchronized view of the
-// object to perform proper cleanup.
-//
-// Original example by Alexander Terekhov:
-//
-// Given:
-//
-// - a mutable shared object OBJ;
-// - two threads THREAD1 and THREAD2 each holding
-// a private smart_ptr object pointing to that OBJ.
-//
-// t1: THREAD1 updates OBJ (thread-safe via some synchronization)
-// and a few cycles later (after "unlock") destroys smart_ptr;
-//
-// t2: THREAD2 destroys smart_ptr WITHOUT doing any synchronization
-// with respect to shared mutable object OBJ; OBJ destructors
-// are called driven by smart_ptr interface...
+// Memory Ordering: acquire/release
//
#include <boost/config.hpp>
#include <boost/smart_ptr/detail/sp_has_sync.hpp>
-#ifndef BOOST_HAS_THREADS
+#if defined( BOOST_AC_DISABLE_THREADS )
+# include <boost/smart_ptr/detail/atomic_count_nt.hpp>
-namespace boost
-{
+#elif defined( BOOST_AC_USE_STD_ATOMIC )
+# include <boost/smart_ptr/detail/atomic_count_std_atomic.hpp>
-namespace detail
-{
+#elif defined( BOOST_AC_USE_SPINLOCK )
+# include <boost/smart_ptr/detail/atomic_count_spin.hpp>
-typedef long atomic_count;
+#elif defined( BOOST_AC_USE_PTHREADS )
+# include <boost/smart_ptr/detail/atomic_count_pt.hpp>
-}
+#elif defined( BOOST_SP_DISABLE_THREADS )
+# include <boost/smart_ptr/detail/atomic_count_nt.hpp>
-}
+#elif defined( BOOST_SP_USE_STD_ATOMIC )
+# include <boost/smart_ptr/detail/atomic_count_std_atomic.hpp>
-#elif defined(BOOST_AC_USE_PTHREADS)
-# include <boost/smart_ptr/detail/atomic_count_pthreads.hpp>
+#elif defined( BOOST_SP_USE_SPINLOCK )
+# include <boost/smart_ptr/detail/atomic_count_spin.hpp>
-#elif defined( __GNUC__ ) && ( defined( __i386__ ) || defined( __x86_64__ ) )
-# include <boost/smart_ptr/detail/atomic_count_gcc_x86.hpp>
+#elif defined( BOOST_SP_USE_PTHREADS )
+# include <boost/smart_ptr/detail/atomic_count_pt.hpp>
-#elif defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__)
-# include <boost/smart_ptr/detail/atomic_count_win32.hpp>
+#elif defined( BOOST_DISABLE_THREADS ) && !defined( BOOST_SP_ENABLE_THREADS ) && !defined( BOOST_DISABLE_WIN32 )
+# include <boost/smart_ptr/detail/atomic_count_nt.hpp>
+
+#elif defined( __GNUC__ ) && ( defined( __i386__ ) || defined( __x86_64__ ) ) && !defined( __PATHSCALE__ )
+# include <boost/smart_ptr/detail/atomic_count_gcc_x86.hpp>
#elif defined( BOOST_SP_HAS_SYNC )
-# include <boost/smart_ptr/detail/atomic_count_sync.hpp>
+# include <boost/smart_ptr/detail/atomic_count_sync.hpp>
-#elif defined(__GLIBCPP__) || defined(__GLIBCXX__)
-# include <boost/smart_ptr/detail/atomic_count_gcc.hpp>
+#elif defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__)
+# include <boost/smart_ptr/detail/atomic_count_win32.hpp>
-#elif defined(BOOST_HAS_PTHREADS)
+#elif defined(__GLIBCPP__) || defined(__GLIBCXX__)
+# include <boost/smart_ptr/detail/atomic_count_gcc.hpp>
-# define BOOST_AC_USE_PTHREADS
-# include <boost/smart_ptr/detail/atomic_count_pthreads.hpp>
+#elif !defined( BOOST_HAS_THREADS )
+# include <boost/smart_ptr/detail/atomic_count_nt.hpp>
#else
-
-// Use #define BOOST_DISABLE_THREADS to avoid the error
-#error Unrecognized threading platform
+# include <boost/smart_ptr/detail/atomic_count_spin.hpp>
#endif