added some doxygen comments to common/system.h; cleaned up the OSystem interface a bit

svn-id: r8116

2 files changed, 4 insertions, 5 deletions

diff --git a/backends/morphos/morphos.cpp b/backends/morphos/morphos.cpp
index 91215f0cd1..34dde38f3f 100644
--- a/backends/morphos/morphos.cpp
+++ b/backends/morphos/morphos.cpp
@@ -308,16 +308,15 @@ void OSystem_MorphOS::set_timer(int timer, int (*callback)(int))
 	warning("set_timer() unexpectedly called");
 }
 
-void *OSystem_MorphOS::create_thread(ThreadProc *proc, void *param)
+void OSystem_MorphOS::create_thread(ThreadProc *proc, void *param)
 {
 	ScummMusicThread = CreateNewProcTags(NP_Entry, (ULONG) proc, NP_CodeType, CODETYPE_PPC,
 													 NP_Name, (ULONG) "ScummVM Music Thread",
 													 NP_Priority, 60, NP_StackSize, 32000,
 													 NP_PPC_Arg1, (ULONG) param, TAG_DONE);
-	return ScummMusicThread;
 }
 
-void *OSystem_MorphOS::create_mutex(void)
+void *OSystem_MorphOS::create_mutex()
 {
 	SignalSemaphore *sem = (SignalSemaphore *) AllocVec(sizeof (SignalSemaphore), MEMF_PUBLIC);
 
diff --git a/backends/morphos/morphos.h b/backends/morphos/morphos.h
index 71985b263e..6327edd647 100644
--- a/backends/morphos/morphos.h
+++ b/backends/morphos/morphos.h
@@ -83,13 +83,13 @@ class OSystem_MorphOS : public OSystem
 		virtual void set_timer(int timer, int (*callback)(int));
 
 		// Mutex handling
-		virtual void *create_mutex(void);
+		virtual void *create_mutex();
 		virtual void lock_mutex(void *mutex);
 		virtual void unlock_mutex(void *mutex);
 		virtual void delete_mutex(void *mutex);
 
 		// Create a thread
-		virtual void *create_thread(ThreadProc *proc, void *param);
+		virtual void create_thread(ThreadProc *proc, void *param);
 
 		// Get the next event.
 		// Returns true if an event was retrieved.