[Boost-commit] svn:boost r85685 - trunk/boost/interprocess/detail

Subject: [Boost-commit] svn:boost r85685 - trunk/boost/interprocess/detail
From: igaztanaga_at_[hidden]
Date: 2013-09-15 15:38:08

Author: igaztanaga
Date: 2013-09-15 15:38:08 EDT (Sun, 15 Sep 2013)
New Revision: 85685
URL: http://svn.boost.org/trac/boost/changeset/85685

Log:
Detect Mac Os version and allow process-shared synchronization primitives when minimum target is Mac Os Lion or newer (refs #6108).

Text files modified: 
   trunk/boost/interprocess/detail/workaround.hpp |    21 +++++++++++++++++++--                   
   1 files changed, 19 insertions(+), 2 deletions(-)

Modified: trunk/boost/interprocess/detail/workaround.hpp
==============================================================================
--- trunk/boost/interprocess/detail/workaround.hpp	Sun Sep 15 15:33:17 2013	(r85684)
+++ trunk/boost/interprocess/detail/workaround.hpp	2013-09-15 15:38:08 EDT (Sun, 15 Sep 2013)	(r85685)
@@ -24,8 +24,25 @@
 
    #if defined(_POSIX_THREAD_PROCESS_SHARED) && ((_POSIX_THREAD_PROCESS_SHARED - 0) > 0)
       //Cygwin defines _POSIX_THREAD_PROCESS_SHARED but does not implement it.
-      //Mac Os X >= Leopard defines _POSIX_THREAD_PROCESS_SHARED but does not seem to work.
-      #if !defined(__CYGWIN__) && !defined(__APPLE__)
+      #if defined(__CYGWIN__)
+         #define BOOST_INTERPROCESS_BUGGY_POSIX_PROCESS_SHARED
+      //Mac Os X < Lion (10.7) might define _POSIX_THREAD_PROCESS_SHARED but there is no real support.
+      #elif defined(__APPLE__)
+         #include "TargetConditionals.h"
+         //Check we're on Mac OS target
+         #if defined(TARGET_OS_MAC)
+            #include "AvailabilityMacros.h"
+            //If minimum target for this compilation is older than Mac Os Lion, then we are out of luck
+            #if MAC_OS_X_VERSION_MIN_REQUIRED < 1070
+               #define BOOST_INTERPROCESS_BUGGY_POSIX_PROCESS_SHARED
+            #endif
+         #endif
+      #endif
+
+      //If buggy _POSIX_THREAD_PROCESS_SHARED is detected avoid using it
+      #if defined(BOOST_INTERPROCESS_BUGGY_POSIX_PROCESS_SHARED)
+         #undef BOOST_INTERPROCESS_BUGGY_POSIX_PROCESS_SHARED
+      #else
          #define BOOST_INTERPROCESS_POSIX_PROCESS_SHARED
       #endif
    #endif