Fix compilation with older (before C99) C compilers.

[wxWidgets.git] / src / mac / carbon / thread.cpp

diff --git a/src/mac/carbon/thread.cpp b/src/mac/carbon/thread.cpp
index c4fc7e90f97f1efe6911ef7684d02fd2d103a381..6c477b3685b804d0cbf4714b14c731c60d22fa06 100644 (file)
--- a/src/mac/carbon/thread.cpp
+++ b/src/mac/carbon/thread.cpp
@@ -114,24 +114,48 @@ MPCriticalRegionID gs_guiCritical = kInvalidID;
     to use two indices one for each 32 bit part as the MP implementation is limited
     to longs.
     
-    I have two implementations for mutexes :
+    I have three implementations for mutexes :
     version A based on a binary semaphore, problem - not reentrant, version B based 
     on a critical region, allows for reentrancy, performance implications not
-    yet tested
+    yet tested, and third a plain pthreads implementation
 
     The same for condition internal, one implementation by Aj Lavin and the other one
     copied from the thrimpl.cpp which I assume has been more broadly tested, I've just
     replaced the interlock increment with the appropriate PPC calls 
 */
 
+// ----------------------------------------------------------------------------
+// wxCriticalSection
+// ----------------------------------------------------------------------------
+
+wxCriticalSection::wxCriticalSection()
+{
+    MPCreateCriticalRegion( (MPCriticalRegionID*) &m_critRegion ) ;
+}
+
+wxCriticalSection::~wxCriticalSection()
+{
+    MPDeleteCriticalRegion( (MPCriticalRegionID) m_critRegion ) ;
+}
+
+void wxCriticalSection::Enter()
+{
+    MPEnterCriticalRegion( (MPCriticalRegionID) m_critRegion , kDurationForever ) ;
+}    
+
+void wxCriticalSection::Leave()
+{
+    MPExitCriticalRegion((MPCriticalRegionID) m_critRegion ) ;
+}
+
 // ----------------------------------------------------------------------------
 // wxMutex implementation
 // ----------------------------------------------------------------------------
 
 #if TARGET_API_MAC_OSX
 #define wxUSE_MAC_SEMAPHORE_MUTEX 0
-#define wxUSE_MAC_CRITICAL_REGION_MUTEX 0
-#define wxUSE_MAC_PTHREADS_MUTEX 1
+#define wxUSE_MAC_CRITICAL_REGION_MUTEX 1
+#define wxUSE_MAC_PTHREADS_MUTEX 0
 #else
 #define wxUSE_MAC_SEMAPHORE_MUTEX 0
 #define wxUSE_MAC_CRITICAL_REGION_MUTEX 1
@@ -347,6 +371,7 @@ wxMutexInternal::~wxMutexInternal()
 {
     if ( m_semaphore != kInvalidID )
            MPDeleteSemaphore( m_semaphore);
+       MPYield() ;
 }
 
 wxMutexError wxMutexInternal::Lock()
@@ -383,12 +408,12 @@ wxMutexError wxMutexInternal::Unlock()
 {
     wxCHECK_MSG( m_isOk , wxMUTEX_MISC_ERROR , wxT("Invalid Mutex") ) ;
        OSStatus err = MPSignalSemaphore( m_semaphore);
+       MPYield() ;
        if ( err)
     {
                wxLogSysError(_("Could not unlock mutex"));
                return wxMUTEX_MISC_ERROR;        
     }
-    
        return wxMUTEX_NO_ERROR;
 }
 
@@ -427,6 +452,7 @@ wxMutexInternal::~wxMutexInternal()
 {
     if ( m_critRegion != kInvalidID )
            MPDeleteCriticalRegion( m_critRegion);
+       MPYield() ;
 }
 
 wxMutexError wxMutexInternal::Lock()
@@ -463,6 +489,7 @@ wxMutexError wxMutexInternal::Unlock()
 {
     wxCHECK_MSG( m_isOk , wxMUTEX_MISC_ERROR , wxT("Invalid Mutex") ) ;
        OSStatus err = MPExitCriticalRegion( m_critRegion);
+       MPYield() ;
        if ( err)
     {
                wxLogSysError(_("Could not unlock mutex"));
@@ -524,6 +551,7 @@ wxSemaphoreInternal::~wxSemaphoreInternal()
 {
     if( m_semaphore != kInvalidID )
            MPDeleteSemaphore( m_semaphore);
+       MPYield() ;
 }
 
 wxSemaError wxSemaphoreInternal::WaitTimeout(unsigned long milliseconds)
@@ -543,6 +571,7 @@ wxSemaError wxSemaphoreInternal::WaitTimeout(unsigned long milliseconds)
 wxSemaError wxSemaphoreInternal::Post()
 {
        OSStatus err = MPSignalSemaphore( m_semaphore);
+       MPYield() ;
        if ( err)
     {
                return wxSEMA_MISC_ERROR;
@@ -957,7 +986,7 @@ private:
        MPQueueID           m_notifyQueueId;    // its notification queue
 
     wxThreadState m_state;              // see wxThreadState enum
-    int           m_prio;               // in wxWindows units: from 0 to 100
+    int           m_prio;               // in wxWidgets units: from 0 to 100
 
     // this flag is set when the thread should terminate
     bool m_cancelled;
@@ -1087,8 +1116,8 @@ void wxThreadInternal::SetPriority( int priority)
        if ( m_tid)
     {
                // Mac priorities range from 1 to 10,000, with a default of 100.
-               // wxWindows priorities range from 0 to 100 with a default of 50.
-               // We can map wxWindows to Mac priorities easily by assuming
+               // wxWidgets priorities range from 0 to 100 with a default of 50.
+               // We can map wxWidgets to Mac priorities easily by assuming
                // the former uses a logarithmic scale.
                const unsigned int macPriority = ( int)( exp( priority / 25.0 * log( 10.0)) + 0.5);
                
@@ -1116,7 +1145,15 @@ void wxThreadInternal::Wait()
     // if the thread we're waiting for is waiting for the GUI mutex, we will
     // deadlock so make sure we release it temporarily
     if ( wxThread::IsMain() )
-        wxMutexGuiLeave();
+    {
+        // give the thread we're waiting for chance to do the GUI call
+        // it might be in, we don't do this conditionally as the to be waited on 
+        // thread might have to acquire the mutex later but before terminating
+        if ( wxGuiOwnedByMainThread() )
+        {
+            wxMutexGuiLeave();
+        }
+    }
 
     {
         wxCriticalSectionLocker lock(m_csJoinFlag);
@@ -1145,10 +1182,6 @@ void wxThreadInternal::Wait()
             m_shouldBeJoined = FALSE;
         }
     }
-
-    // reacquire GUI mutex
-    if ( wxThread::IsMain() )
-        wxMutexGuiEnter();
 }
 
 void wxThreadInternal::Pause()
@@ -1192,7 +1225,7 @@ wxThread *wxThread::This()
 
 bool wxThread::IsMain()
 {
-       return GetCurrentId() == gs_idMainThread;
+       return GetCurrentId() == gs_idMainThread || gs_idMainThread == kInvalidID ;
 }
 
 #ifdef Yield
@@ -1403,7 +1436,6 @@ wxThreadError wxThread::Delete(ExitCode *rc)
                     *rc = m_internal->GetExitCode();
                 }
             }
-            //else: can't wait for detached threads
     }
 
     return wxTHREAD_NO_ERROR;
@@ -1460,7 +1492,7 @@ void wxThread::Exit(ExitCode status)
     // m_critsect on us (almost all of them do)
     OnExit();
 
-    MPTerminateTask( m_internal->GetId() , (long) status) ;
+    MPTaskID threadid = m_internal->GetId() ;
     
     if ( IsDetached() )
     {
@@ -1472,6 +1504,7 @@ void wxThread::Exit(ExitCode status)
         wxCriticalSectionLocker lock(m_critsect);
         m_internal->SetState(STATE_EXITED);
     }
+    MPTerminateTask( threadid , (long) status) ;    
 }
 
 // also test whether we were paused
@@ -1621,6 +1654,11 @@ void wxThreadModule::OnExit()
 {
     if ( gs_critsectGui )
     {
+        if ( !wxGuiOwnedByMainThread() )
+        {
+            gs_critsectGui->Enter();
+            gs_bGuiOwnedByMainThread = true;
+        }
         gs_critsectGui->Leave();
         delete gs_critsectGui;
         gs_critsectGui = NULL;