Refactored the ReentrantMutex support so that it utilises the underling thread implementation for recusive mutex support.

include/OpenThreads/Mutex

@@ -34,16 +34,26 @@ class OPENTHREAD_EXPORT_DIRECTIVE Mutex {
 
 public:
 
+    enum MutexType
+    {
+        MUTEX_NORMAL,
+        MUTEX_RECURSIVE
+    };
+
     /**
      *  Constructor
      */
-    Mutex();
+    Mutex(MutexType type=MUTEX_NORMAL);
 
     /**
      *  Destructor
      */
     virtual ~Mutex();
 
+
+    MutexType getMutexType() const { return _mutexType; }
+
+
     /**
      *  Lock the mutex
      *
@@ -81,6 +91,7 @@ private:
      *  Implementation-specific private data.
      */
     void *_prvData;
+    MutexType _mutexType;
 
 };
 

include/OpenThreads/ReentrantMutex

@@ -25,98 +25,7 @@ class ReentrantMutex : public OpenThreads::Mutex
     public:
 
         ReentrantMutex():
-            _threadHoldingMutex(0),
-            _lockCount(0) {}
-
-        virtual ~ReentrantMutex() {}
-
-        virtual int lock()
-        {
-            {
-                OpenThreads::ScopedLock<OpenThreads::Mutex> lock(_lockCountMutex);
-                if (_threadHoldingMutex==OpenThreads::Thread::CurrentThread() && _lockCount>0)
-                {
-                    ++_lockCount;
-                    return 0;
-                }
-            }
-
-            int result = Mutex::lock();
-            if (result==0)
-            {
-                OpenThreads::ScopedLock<OpenThreads::Mutex> lock(_lockCountMutex);
-
-                _threadHoldingMutex = OpenThreads::Thread::CurrentThread();
-                _lockCount = 1;
-            }
-            return result;
-        }
-
-
-        virtual int unlock()
-        {
-            OpenThreads::ScopedLock<OpenThreads::Mutex> lock(_lockCountMutex);
-        #if 0
-            if (_threadHoldingMutex==OpenThreads::Thread::CurrentThread() && _lockCount>0)
-            {
-                --_lockCount;
-                if (_lockCount<=0)
-                {
-                    _threadHoldingMutex = 0;
-                    return Mutex::unlock();
-                }
-            }
-            else
-            {
-                osg::notify(osg::NOTICE)<<"Error: ReentrantMutex::unlock() - unlocking from the wrong thread."<<std::endl;
-            }
-        #else
-            if (_lockCount>0)
-            {
-                --_lockCount;
-                if (_lockCount<=0)
-                {
-                    _threadHoldingMutex = 0;
-                    return Mutex::unlock();
-                }
-            }
-        #endif    
-            return 0;
-        }
-        
-
-        virtual int trylock()
-        {
-            {
-                OpenThreads::ScopedLock<OpenThreads::Mutex> lock(_lockCountMutex);
-                if (_threadHoldingMutex==OpenThreads::Thread::CurrentThread() && _lockCount>0)
-                {
-                    ++_lockCount;
-                    return 0;
-                }
-            }
-
-            int result = Mutex::trylock();
-            if (result==0)
-            {
-                OpenThreads::ScopedLock<OpenThreads::Mutex> lock(_lockCountMutex);
-
-                _threadHoldingMutex = OpenThreads::Thread::CurrentThread();
-                _lockCount = 1;
-            }
-            return result;
-        }
-
-    private:
-
-        ReentrantMutex(const ReentrantMutex&):OpenThreads::Mutex() {}
-
-        ReentrantMutex& operator =(const ReentrantMutex&) { return *(this); }
-        
-        OpenThreads::Thread* _threadHoldingMutex;
-        
-        OpenThreads::Mutex  _lockCountMutex;
-        unsigned int        _lockCount;
+            Mutex(MUTEX_RECURSIVE) {}
 
 };
 

src/OpenThreads/pthreads/PThreadMutex.c++

@@ -30,17 +30,25 @@ using namespace OpenThreads;
 //
 // Use: public.
 //
-Mutex::Mutex() {
+Mutex::Mutex(MutexType type):
+    _mutexType(type)
+{
 
     pthread_mutexattr_t mutex_attr;
     pthread_mutexattr_init( &mutex_attr );
     
     PThreadMutexPrivateData *pd = new PThreadMutexPrivateData();
 
+    if (type==MUTEX_RECURSIVE)
+    {
+        pthread_mutexattr_settype( &mutex_attr, PTHREAD_MUTEX_RECURSIVE );
+    }
+    else
+    {
     #ifndef __linux__ // (not available until NPTL) [
         pthread_mutexattr_settype( &mutex_attr, PTHREAD_MUTEX_ERRORCHECK );
     #endif // ] __linux__
-
+    }
 #ifdef ALLOW_PRIORITY_SCHEDULING // [
 
 #ifdef __sun // [

src/OpenThreads/sproc/SprocMutex.c++

@@ -34,7 +34,9 @@ using namespace OpenThreads;
 //
 // Use: public.
 //
-Mutex::Mutex() {
+Mutex::Mutex(MutexType type):
+    _mutexType(type)
+{
 
     SprocMutexPrivateData *pd = new SprocMutexPrivateData();
 

src/OpenThreads/win32/Win32Mutex.cpp

@@ -81,7 +81,10 @@ static void _S_nsec_sleep(int __log_nsec) {
 //
 // Use: public.
 //
-Mutex::Mutex() {
+Mutex::Mutex(MutexType type):
+    _mutexType(type)
+)
+{
     Win32MutexPrivateData *pd = new Win32MutexPrivateData();
     _prvData = static_cast<void *>(pd);
 }