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理解系统组件
下面我们分开来了解系统中的各个组件。
CThreadManage
CThreadManage的功能非常简单，其提供最简单的方法，其类定义如下：
class CThreadManage
{
private:
CThreadPool* m_Pool;
int m_NumOfThread;
protected:
public:
void SetParallelNum(int num);
CThreadManage();
CThreadManage(int num);
virtual ~CThreadManage();
void Run(CJob* job,void* jobdata);
void TerminateAll(void);
};
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其中m_Pool指向实际的线程池；m_NumOfThread是初始创建时候允许创建的并发的线程个数。另外Run和TerminateAll方法也非常简单，只是简单的调用CThreadPool的一些相关方法而已。其具体的实现如下:
CThreadManage::CThreadManage(){
m_NumOfThread = 10;
m_Pool = new CThreadPool(m_NumOfThread);
}
CThreadManage::CThreadManage(int num){
m_NumOfThread = num;
m_Pool = new CThreadPool(m_NumOfThread);
}
CThreadManage::~CThreadManage(){
if(NULL != m_Pool)
delete m_Pool;
}
void CThreadManage::SetParallelNum(int num){
m_NumOfThread = num;
}
void CThreadManage::Run(CJob* job,void* jobdata){
m_Pool->Run(job,jobdata);
}
void CThreadManage::TerminateAll(void){
m_Pool->TerminateAll();
}
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CThread
CThread 类实现了对Linux中线程操作的封装，它是所有线程的基类，也是一个抽象类，提供了一个抽象接口Run，所有的CThread都必须实现该Run方法。CThread的定义如下所示：
class CThread
{
private:
int m_ErrCode;
Semaphore m_ThreadSemaphore; //the inner semaphore, which is used to realize
unsigned long m_ThreadID;
bool m_Detach; //The thread is detached
bool m_CreateSuspended; //if suspend after creating
char* m_ThreadName;
ThreadState m_ThreadState; //the state of the thread
protected:
void SetErrcode(int errcode){m_ErrCode = errcode;}
static void* ThreadFunction(void*);
public:
CThread();
CThread(bool createsuspended,bool detach);
virtual ~CThread();
virtual void Run(void) = 0;
void SetThreadState(ThreadState state){m_ThreadState = state;}
bool Terminate(void); //Terminate the threa
bool Start(void); //Start to execute the thread
void Exit(void);
bool Wakeup(void);
ThreadState GetThreadState(void){return m_ThreadState;}
int GetLastError(void){return m_ErrCode;}
void SetThreadName(char* thrname){strcpy(m_ThreadName,thrname);}
char* GetThreadName(void){return m_ThreadName;}
int GetThreadID(void){return m_ThreadID;}
bool SetPriority(int priority);
int GetPriority(void);
int GetConcurrency(void);
void SetConcurrency(int num);
bool Detach(void);
bool Join(void);
bool Yield(void);
int Self(void);
};
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