add

+/*
+ * Copyright 2007 Stephen Liu
+ * For license terms, see the file COPYING along with this library.
+ */
+
+
+#ifndef __spthreadpool_hpp__
+#define __spthreadpool_hpp__
+
+#include "spthread.hpp"
+
+typedef struct tagSP_Thread SP_Thread_t;
+
+class SP_ThreadPool {
+public:
+	typedef void ( * DispatchFunc_t )( void * );
+
+	SP_ThreadPool( int maxThreads, const char * tag = 0 );
+	~SP_ThreadPool();
+
+	/// @return 0 : OK, -1 : cannot create thread
+	int dispatch( DispatchFunc_t dispatchFunc, void *arg );
+
+	int getMaxThreads();
+
+private:
+	char * mTag;
+
+	int mMaxThreads;
+	int mIndex;
+	int mTotal;
+	int mIsShutdown;
+
+	sp_thread_mutex_t mMainMutex;
+	sp_thread_cond_t mIdleCond;
+	sp_thread_cond_t mFullCond;
+	sp_thread_cond_t mEmptyCond;
+
+	SP_Thread_t ** mThreadList;
+
+	static sp_thread_result_t SP_THREAD_CALL wrapperFunc( void * );
+	int saveThread( SP_Thread_t * thread );
+};
+
+#endif
+