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utils/vmpi/threadhelpers.h

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//=============================================================================//
+
+#ifndef THREADHELPERS_H
+#define THREADHELPERS_H
+#ifdef _WIN32
+#pragma once
+#endif
+
+
+#include "tier1/utllinkedlist.h"
+
+
+#define SIZEOF_CS	24	// sizeof( CRITICAL_SECTION )
+
+
+class CCriticalSection
+{
+public:
+			CCriticalSection();
+			~CCriticalSection();
+
+
+protected:
+
+	friend class CCriticalSectionLock;
+	
+	void	Lock();
+	void	Unlock();
+
+
+public:
+	char	m_CS[SIZEOF_CS];
+
+	// Used to protect against deadlock in debug mode.
+//#if defined( _DEBUG )
+	CUtlLinkedList<unsigned long,int>	m_Locks;
+	char								m_DeadlockProtect[SIZEOF_CS];
+//#endif
+};
+
+
+// Use this to lock a critical section.
+class CCriticalSectionLock
+{
+public:
+			CCriticalSectionLock( CCriticalSection *pCS );
+			~CCriticalSectionLock();
+	void	Lock();
+	void	Unlock();
+
+private:
+	CCriticalSection	*m_pCS;
+	bool				m_bLocked;
+};
+
+
+template< class T >
+class CCriticalSectionData : private CCriticalSection
+{
+public:
+	// You only have access to the data between Lock() and Unlock().
+	T*		Lock()
+	{
+		CCriticalSection::Lock();
+		return &m_Data;
+	}
+	
+	void	Unlock()
+	{
+		CCriticalSection::Unlock();
+	}
+
+private:
+	T m_Data;
+};
+
+
+
+// ------------------------------------------------------------------------------------------------ //
+// CEvent.
+// ------------------------------------------------------------------------------------------------ //
+class CEvent
+{
+public:
+	CEvent();
+	~CEvent();
+
+	bool Init( bool bManualReset, bool bInitialState );
+	void Term();
+	
+	void* GetEventHandle() const;
+
+	// Signal the event.
+	bool SetEvent();
+
+	// Unset the event's signalled status.
+	bool ResetEvent();
+
+
+private:
+	void *m_hEvent;
+};
+
+
+#endif // THREADHELPERS_H