clocktimer.h

来自「国内著名嵌入式培训机构内部资料,内含一些实例代码,包括技术专题书籍」· C头文件 代码 · 共 68 行

/*
 ============================================================================
 Name		: ClockTimer.h
 Author	  : hou maoqing
 Version	 : 1.0
 Copyright   : Copyright (c) Hou maoqing 2008
 Description : CClockTimer declaration
 ============================================================================
 */

#ifndef CLOCKTIMER_H
#define CLOCKTIMER_H

#include <e32base.h>	// For CActive, link against: euser.lib
#include <e32std.h>		// For RTimer, link against: euser.lib
class CClockTimer : public CActive
	{
public:
	// Cancel and destroy
	~CClockTimer();

	// Two-phased constructor.
	static CClockTimer* NewL();

	// Two-phased constructor.
	static CClockTimer* NewLC();

public:
	// New functions
	// Function for making the initial request
	void StartL(TTimeIntervalMicroSeconds32 aDelay);

private:
	// C++ constructor
	CClockTimer();

	// Second-phase constructor
	void ConstructL();

private:
	// From CActive
	// Handle completion
	void RunL();

	// How to cancel me
	void DoCancel();

	// Override to handle leaves from RunL(). Default implementation causes
	// the active scheduler to panic.
	TInt RunError(TInt aError);

private:
	enum TClockTimerState
		{
		EUninitialized, // Uninitialized
		EInitialized, // Initalized
		EError // Error condition
		};

private:
	TInt iState; // State of the active object
	RTimer iTimer; // Provides async timing service

	TInt m_nExitCount;
	};

#endif // CLOCKTIMER_H