- Let the user disable the new GCC 4.0 visibility support

from configure. This is mainly there for buggy compilers / binutils.


git-svn-id: svn://svn.gna.org/svn/sgpemv2/trunk@715 3ecf2c5c-341e-0410-92b4-d18e462d057c

configure.ac

@@ -101,18 +101,31 @@ AH_TEMPLATE([SG_DLLIMPORT],[Attribute for objects to be imported from DSOs])
 AH_TEMPLATE([SG_DLLLOCAL], [Attribute for objects local to current DSO])
 AH_TEMPLATE([SG_DLLPUBLIC],[Attribute for DSO public objects])
 
+AC_ARG_ENABLE([visibility-support],
+    AS_HELP_STRING([--disable-visibility-support],
+                   [disable the new GCC visibility support]),
+    [enable_gcc_visibility="$enableval"],
+		[enable_gcc_visibility="yes"])
+AC_MSG_CHECKING([whether to use new GCC visibility attributes])
+
 dnl for now it works only with GCC >= 4.0.0
-AC_MSG_CHECKING([whether GCC supports DSO visibility attributes])
 AC_LANG_PUSH([C++])
-AC_COMPILE_IFELSE(
-	AC_LANG_PROGRAM([], [
-		#if defined __GNUC__ && (__GNUC__) >= 4
-		return 0;
-		#else
-		bails out with a compilation error.
-		#endif
-	]),[
-		  AC_MSG_RESULT([yes])
+if test "x$enable_gcc_visibility" = "xyes"; then
+	 AC_COMPILE_IFELSE(
+	 	AC_LANG_PROGRAM([], [
+				#if defined __GNUC__ && (__GNUC__) >= 4
+						return 0;
+				#else
+						bails out with a compilation error.
+    		#endif
+    ]),
+		:,
+		[enable_gcc_visibility="no"])
+fi
+AC_LANG_POP				
+
+if test "x$enable_gcc_visibility" = "xyes"; then
+	  AC_MSG_RESULT([yes])
 		AC_DEFINE([SG_DLLIMPORT],[/* intentionally left with no value */])
 		AC_DEFINE([SG_DLLEXPORT],[__attribute__ ((visibility("default")))])
 		AC_DEFINE([SG_DLLLOCAL],[__attribute__ ((visibility("hidden")))])
@@ -121,14 +134,13 @@ AC_COMPILE_IFELSE(
 		AC_CHECK_CXXFLAG([VISIB_HIDDEN], [fvisibility=hidden])
 		AC_SUBST([VISIB_HIDDEN])
 		AC_CHECK_CXXFLAG([CXXFLAGS],[fvisibility-inlines-hidden])
-	],[
+else
 		AC_MSG_RESULT([no])
 		AC_DEFINE([SG_DLLIMPORT],[/* unsupported */])
 		AC_DEFINE([SG_DLLEXPORT],[/* unsupported */])
 		AC_DEFINE([SG_DLLLOCAL],[/* unsupported */])
 		AC_DEFINE([SG_DLLPUBLIC],[/* unsupported */])
-])
-AC_LANG_POP
+fi
 
 dnl check for Doxygen
 AC_CHECK_PROG([HAVE_DOXYGEN],[doxygen],[yes])

plugins/pyloader/configure.ac

@@ -111,18 +111,31 @@ AH_TEMPLATE([SG_DLLIMPORT],[Attribute for objects to be imported from DSOs])
 AH_TEMPLATE([SG_DLLLOCAL], [Attribute for objects local to current DSO])
 AH_TEMPLATE([SG_DLLPUBLIC],[Attribute for DSO public objects])
 
+AC_ARG_ENABLE([visibility-support],
+    AS_HELP_STRING([--disable-visibility-support],
+                   [disable the new GCC visibility support]),
+    [enable_gcc_visibility="$enableval"],
+		[enable_gcc_visibility="yes"])
+AC_MSG_CHECKING([whether to use new GCC visibility attributes])
+
 dnl for now it works only with GCC >= 4.0.0
-AC_MSG_CHECKING([whether GCC supports DSO visibility attributes])
 AC_LANG_PUSH([C++])
-AC_COMPILE_IFELSE(
-	AC_LANG_PROGRAM([], [
-		#if defined __GNUC__ && (__GNUC__) >= 4
-		return 0;
-		#else
-		bails out with a compilation error.
-		#endif
-	]),[
-		AC_MSG_RESULT([yes])
+if test "x$enable_gcc_visibility" = "xyes"; then
+	 AC_COMPILE_IFELSE(
+	 	AC_LANG_PROGRAM([], [
+				#if defined __GNUC__ && (__GNUC__) >= 4
+						return 0;
+				#else
+						bails out with a compilation error.
+    		#endif
+    ]),
+		:,
+		[enable_gcc_visibility="no"])
+fi
+AC_LANG_POP				
+
+if test "x$enable_gcc_visibility" = "xyes"; then
+	  AC_MSG_RESULT([yes])
 		AC_DEFINE([SG_DLLIMPORT],[/* intentionally left with no value */])
 		AC_DEFINE([SG_DLLEXPORT],[__attribute__ ((visibility("default")))])
 		AC_DEFINE([SG_DLLLOCAL],[__attribute__ ((visibility("hidden")))])
@@ -131,14 +144,14 @@ AC_COMPILE_IFELSE(
 		AC_CHECK_CXXFLAG([VISIB_HIDDEN], [fvisibility=hidden])
 		AC_SUBST([VISIB_HIDDEN])
 		AC_CHECK_CXXFLAG([CXXFLAGS],[fvisibility-inlines-hidden])
-	],[
+else
 		AC_MSG_RESULT([no])
 		AC_DEFINE([SG_DLLIMPORT],[/* unsupported */])
 		AC_DEFINE([SG_DLLEXPORT],[/* unsupported */])
 		AC_DEFINE([SG_DLLLOCAL],[/* unsupported */])
 		AC_DEFINE([SG_DLLPUBLIC],[/* unsupported */])
-])
-AC_LANG_POP
+fi
+
 
 dnl see if we've to compile tests
 AC_MSG_CHECKING([whether tests have to be built])

plugins/xmlsave/configure.ac

@@ -100,6 +100,7 @@ PKG_CHECK_MODULES([LIBXML2],
 		[libxml-2.0 >= $LIBXML2_VERSION],
 		:, AC_MSG_ERROR([$LIBXML2_PKG_ERRORS]))
 
+
 dnl use DSO visibility tags for systems that supports it correctly
 dnl (for example, GCC 4.0 and above)
 dnl see http://gcc.gnu.org/wiki/Visibility for more informations
@@ -108,18 +109,31 @@ AH_TEMPLATE([SG_DLLIMPORT],[Attribute for objects to be imported from DSOs])
 AH_TEMPLATE([SG_DLLLOCAL], [Attribute for objects local to current DSO])
 AH_TEMPLATE([SG_DLLPUBLIC],[Attribute for DSO public objects])
 
+AC_ARG_ENABLE([visibility-support],
+    AS_HELP_STRING([--disable-visibility-support],
+                   [disable the new GCC visibility support]),
+    [enable_gcc_visibility="$enableval"],
+		[enable_gcc_visibility="yes"])
+AC_MSG_CHECKING([whether to use new GCC visibility attributes])
+
 dnl for now it works only with GCC >= 4.0.0
-AC_MSG_CHECKING([whether GCC supports DSO visibility attributes])
 AC_LANG_PUSH([C++])
-AC_COMPILE_IFELSE(
-	AC_LANG_PROGRAM([], [
-		#if defined __GNUC__ && (__GNUC__) >= 4
-		return 0;
-		#else
-		bails out with a compilation error.
-		#endif
-	]),[
-		AC_MSG_RESULT([yes])
+if test "x$enable_gcc_visibility" = "xyes"; then
+	 AC_COMPILE_IFELSE(
+	 	AC_LANG_PROGRAM([], [
+				#if defined __GNUC__ && (__GNUC__) >= 4
+						return 0;
+				#else
+						bails out with a compilation error.
+    		#endif
+    ]),
+		:,
+		[enable_gcc_visibility="no"])
+fi
+AC_LANG_POP				
+
+if test "x$enable_gcc_visibility" = "xyes"; then
+	  AC_MSG_RESULT([yes])
 		AC_DEFINE([SG_DLLIMPORT],[/* intentionally left with no value */])
 		AC_DEFINE([SG_DLLEXPORT],[__attribute__ ((visibility("default")))])
 		AC_DEFINE([SG_DLLLOCAL],[__attribute__ ((visibility("hidden")))])
@@ -128,14 +142,14 @@ AC_COMPILE_IFELSE(
 		AC_CHECK_CXXFLAG([VISIB_HIDDEN], [fvisibility=hidden])
 		AC_SUBST([VISIB_HIDDEN])
 		AC_CHECK_CXXFLAG([CXXFLAGS],[fvisibility-inlines-hidden])
-	],[
+else
 		AC_MSG_RESULT([no])
 		AC_DEFINE([SG_DLLIMPORT],[/* unsupported */])
 		AC_DEFINE([SG_DLLEXPORT],[/* unsupported */])
 		AC_DEFINE([SG_DLLLOCAL],[/* unsupported */])
 		AC_DEFINE([SG_DLLPUBLIC],[/* unsupported */])
-])
-AC_LANG_POP
+fi
+
 
 dnl see if we've to compile tests
 AC_MSG_CHECKING([whether tests have to be built])

src/backend/scheduler.cc

@@ -29,7 +29,9 @@
 
 #include <glibmm/thread.h>
 
+#include <cassert>
 #include <memory>
+
 using namespace std;
 using namespace sgpem;
 
@@ -56,6 +58,22 @@ collect_threads(const std::vector<Process*>& procs,
     }
 }
 
+static void prepare_ready_queue(ConcreteEnvironment&         snapshot, 
+																std::vector<DynamicThread*>& all_threads)
+{
+	typedef std::vector<DynamicThread*> Threads;
+	ReadyQueue& queue = snapshot.get_sorted_queue();
+	assert(queue.size() == 0);
+	for(Threads::const_iterator it = all_threads.begin(); 
+			it != all_threads.end(); it++)
+		{
+			if((*it)->get_state() == Schedulable::state_ready)
+				all_threads.push_back(*it);
+		}
+}
+
+
+
 // ---------------------------------------------------------
 
 
@@ -201,8 +219,7 @@ Scheduler::step_forward(History& history, Policy& cpu_policy) throw(UserInterrup
 	// (is it visible enough for you?)
 
  
-	ReadyQueue& ready_queue = new_snapshot->get_sorted_queue();
-	prepare_ready_queue(ready_queue);
+	prepare_ready_queue(*new_snapshot, all_threads);
 	try
 		{
 			// Temporarily set the _ready_queue param and the _policy one for 
@@ -210,7 +227,6 @@ Scheduler::step_forward(History& history, Policy& cpu_policy) throw(UserInterrup
 			_policy = &cpu_policy;
 			_ready_queue = &new_snapshot->get_sorted_queue();
 			
-
 			// ?. Use the policy to sort the queue
 
 			// FIXME: how does it get the queue?
@@ -218,10 +234,11 @@ Scheduler::step_forward(History& history, Policy& cpu_policy) throw(UserInterrup
 		}
 	catch(UserInterruptException& e)
 		{
+			// Reset values that the policy doesn't need anymore
 			_policy      = NULL;
 			_ready_queue = NULL;
-			//              ^^^^^ 
-			//  Do we need to update something else?
+
+			//  Do we need to update/reset something else?
 
 			// Going up unwinding the stack, tell:
 			//    - the user that the policy sucks
@@ -232,14 +249,10 @@ Scheduler::step_forward(History& history, Policy& cpu_policy) throw(UserInterrup
 	// append the new snapshot...
 	// ...and remember to release the auto_ptr!
 	concrete_history.append_new_environment(new_snapshot.release());
+
+	// Reset values that the policy doesn't need anymore
 	_policy      = NULL;
 	_ready_queue = NULL;
 }
 
 
-
-void 
-Scheduler::prepare_ready_queue(ReadyQueue& queue)
-{
-
-}

src/backend/scheduler.hh

@@ -88,8 +88,6 @@ namespace sgpem
     Policy&      get_policy();
 
   private:    
-    void prepare_ready_queue(ReadyQueue& queue);
-    
     Scheduler();     //private constructor.
        
     ReadyQueue*       _ready_queue;