Add framework for threading API abstraction.

Core/CMakeLists.txt

@@ -34,17 +34,27 @@ INCLUDE_DIRECTORIES( ${TexC_BINARY_DIR}/IO/include )
 
 INCLUDE_DIRECTORIES( ${TexC_SOURCE_DIR}/Core/include )
 
+SET( THREAD_API "None" )
 FIND_PACKAGE( Boost COMPONENTS thread system ) 
 IF( Boost_FOUND )
 	INCLUDE_DIRECTORIES( ${Boost_INCLUDE_DIR} )
 
+	SET( THREAD_API "Boost" )
+	SET( SOURCES ${SOURCES} "src/ThreadBoost.cpp" )
+
+	LINK_DIRECTORIES( ${Boost_LIBRARY_DIR} )
+ENDIF()
+
+IF( NOT THREAD_API MATCHES "None")
+
 	SET( SOURCES ${SOURCES} "src/ThreadGroup.cpp" )
 	SET( SOURCES ${SOURCES} "src/WorkerQueue.cpp" )
 
+	SET( HEADERS ${HEADERS} "src/Thread.h" )
 	SET( HEADERS ${HEADERS} "src/ThreadGroup.h" )
 	SET( HEADERS ${HEADERS} "src/WorkerQueue.h" )
-
-	LINK_DIRECTORIES( ${Boost_LIBRARY_DIR} )
+ELSE()
+  MESSAGE( FATAL_ERROR "Could not find suitable threading library." )
 ENDIF()
 
 ADD_LIBRARY( TexCompCore

Core/src/Thread.h

@@ -0,0 +1,79 @@
+#ifndef __TEX_COMP_THREAD_H__
+#define __TEX_COMP_THREAD_H__
+
+#include "TexCompTypes.h"
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// Base implementation
+//
+////////////////////////////////////////////////////////////////////////////////
+
+class TCThreadBaseImpl;
+class TCThreadBaseImplFactory;
+class TCThreadBase {
+ protected:
+  TCThreadBase(const TCThreadBaseImplFactory &);
+  TCThreadBase(const TCThreadBase &);
+  TCThreadBase &operator=(const TCThreadBase &);
+  ~TCThreadBase();
+
+  TCThreadBaseImpl *m_Impl;
+};
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// Thread implementation
+//
+////////////////////////////////////////////////////////////////////////////////
+
+class TCThread : public TCThreadBase {
+
+ public:
+  template<typename C>
+  TCThread(C &);
+  ~TCThread();
+
+  void Join();
+  
+};
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// Mutex implementation
+//
+////////////////////////////////////////////////////////////////////////////////
+
+class TCMutex : public TCThreadBase {
+  friend class TCLockImpl;
+ public:
+  TCMutex();
+};
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// Lock implementation
+//
+////////////////////////////////////////////////////////////////////////////////
+
+class TCLock : public TCThreadBase {
+  friend class TCConditionVariableImpl;
+ public:
+  TCLock(TCMutex &);
+};
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// Condition Variable implementation
+//
+////////////////////////////////////////////////////////////////////////////////
+
+class TCConditionVariable : public TCThreadBase {
+ public:
+  TCConditionVariable();
+  void Wait(TCLock &);
+  void NotifyOne();
+  void NotifyAll();
+};
+
+#endif //__TEX_COMP_THREAD_H__

Core/src/ThreadBoost.cpp

@@ -0,0 +1,213 @@
+#include "Thread.h"
+
+#include <assert.h>
+
+#include <boost/thread/thread.hpp>
+#include <boost/thread/mutex.hpp>
+#include <boost/thread/condition_variable.hpp>
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// Base Implementation
+//
+////////////////////////////////////////////////////////////////////////////////
+
+class TCThreadBaseImpl {
+  int m_ReferenceCount;
+public:
+  TCThreadBaseImpl()
+    : m_ReferenceCount(1)
+  { }
+
+  void IncreaseReferenceCount() { m_ReferenceCount++; }
+  void DecreaseReferenceCount() { m_ReferenceCount--; }
+
+  int GetReferenceCount() const { return m_ReferenceCount; }
+};
+
+class TCThreadBaseImplFactory {
+public:
+  TCThreadBaseImplFactory() { }
+  virtual ~TCThreadBaseImplFactory() { }
+  virtual TCThreadBaseImpl *CreateImpl() const = 0;
+};
+
+TCThreadBase::TCThreadBase(const TCThreadBaseImplFactory &factory)
+  : m_Impl(factory.CreateImpl())
+{ }
+
+TCThreadBase::TCThreadBase(const TCThreadBase &other)
+  : m_Impl(other.m_Impl)
+{
+  assert(m_Impl->GetReferenceCount() > 0);
+  m_Impl->IncreaseReferenceCount();
+}
+
+TCThreadBase &TCThreadBase::operator=(const TCThreadBase &other) {
+  assert(m_Impl->GetReferenceCount() > 0);
+  m_Impl->DecreaseReferenceCount();
+  m_Impl = other.m_Impl;
+  m_Impl->IncreaseReferenceCount();
+}
+
+TCThreadBase::~TCThreadBase() {
+  if(m_Impl->GetReferenceCount() <= 1) {
+    delete m_Impl;
+  }
+}
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// Thread Implementation
+//
+////////////////////////////////////////////////////////////////////////////////
+
+class TCThreadImpl : public TCThreadBaseImpl {
+  boost::thread m_Thread;
+public:
+  template<typename C>
+  TCThreadImpl(C &callable)
+    : m_Thread(callable)
+  { }
+
+  void Join() {
+    m_Thread.join();
+  }
+};
+
+template<typename C>
+class TCThreadImplFactory : public TCThreadBaseImplFactory {
+  C &m_Callable;
+public:
+  TCThreadImplFactory(C &callable) : m_Callable(callable) { }
+  virtual ~TCThreadImplFactory() { }
+  virtual TCThreadBaseImpl *CreateImpl() const {
+    return new TCThreadImpl(m_Callable);
+  }
+};
+
+template<typename C>
+TCThread::TCThread(C &callable)
+  : TCThreadBase(TCThreadImplFactory<C>(callable))
+{ }
+
+void TCThread::Join() {
+  assert(m_Impl->GetReferenceCount() > 0);
+  ((TCThreadImpl *)m_Impl)->Join();
+}
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// Mutex Implementation
+//
+////////////////////////////////////////////////////////////////////////////////
+
+class TCMutexImpl : public TCThreadBaseImpl {
+private:
+  boost::mutex m_Mutex;
+
+public:
+  boost::mutex &GetMutex() { return m_Mutex; }
+};
+
+class TCMutexImplFactory : public TCThreadBaseImplFactory {
+public:
+  TCMutexImplFactory() { }
+  virtual ~TCMutexImplFactory() { }
+  virtual TCThreadBaseImpl *CreateImpl() const {
+    return new TCMutexImpl();
+  }
+};
+
+TCMutex::TCMutex() : TCThreadBase(TCMutexImplFactory())
+{ }
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// Lock Implementation
+//
+////////////////////////////////////////////////////////////////////////////////
+
+class TCLockImpl : public TCThreadBaseImpl {
+private:
+  boost::unique_lock<boost::mutex> lock;
+public:
+  TCLockImpl(TCMutex &mutex)
+    : lock(((TCMutexImpl *)(mutex.m_Impl))->GetMutex())
+  { }
+
+  boost::unique_lock<boost::mutex> &GetLock() { return lock; }
+};
+
+class TCLockImplFactory : public TCThreadBaseImplFactory {
+private:
+  TCMutex &m_Mutex;
+public:
+  TCLockImplFactory(TCMutex &mutex) : m_Mutex(mutex){ }
+  virtual ~TCLockImplFactory() { }
+  virtual TCThreadBaseImpl *CreateImpl() const {
+    return new TCLockImpl(m_Mutex);
+  }
+};
+
+TCLock::TCLock(TCMutex &mutex) : TCThreadBase(TCLockImplFactory(mutex))
+{ }
+
+////////////////////////////////////////////////////////////////////////////////
+//
+// Condition Variable Implementation
+//
+////////////////////////////////////////////////////////////////////////////////
+
+class TCConditionVariableImpl : public TCThreadBaseImpl {
+private:
+  boost::condition_variable m_CV;
+public:
+  TCConditionVariableImpl() { }
+  void Wait(TCLock &lock) {
+    TCLockImpl *lockImpl = (TCLockImpl *)(lock.m_Impl);
+    m_CV.wait(lockImpl->GetLock());
+  }
+
+  void NotifyOne() {
+    m_CV.notify_one();
+  }
+
+  void NotifyAll() {
+    m_CV.notify_all();
+  }
+};
+
+class TCConditionVariableImplFactory : public TCThreadBaseImplFactory {
+public:
+  TCConditionVariableImplFactory() { }
+  virtual ~TCConditionVariableImplFactory() { }
+  virtual TCThreadBaseImpl *CreateImpl() const {
+    return new TCConditionVariableImpl();
+  }
+};
+
+TCConditionVariable::TCConditionVariable()
+  : TCThreadBase(TCConditionVariableImplFactory())
+{ }
+
+void TCConditionVariable::Wait(TCLock &lock) {
+  assert(m_Impl->GetReferenceCount() > 0);
+
+  TCConditionVariableImpl *impl = (TCConditionVariableImpl *)m_Impl;
+  impl->Wait(lock);
+}
+
+void TCConditionVariable::NotifyOne() {
+  assert(m_Impl->GetReferenceCount() > 0);
+
+  TCConditionVariableImpl *impl = (TCConditionVariableImpl *)m_Impl;
+  impl->NotifyOne();
+}
+
+void TCConditionVariable::NotifyAll() {
+  assert(m_Impl->GetReferenceCount() > 0);
+
+  TCConditionVariableImpl *impl = (TCConditionVariableImpl *)m_Impl;
+  impl->NotifyAll();
+}