C++坐昼協扮匂
作者 佚名技术
来源 程序设计
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发布时间 2012-05-23
* * All I ask is that if you use LRTimer in your project retain the * * copyright notice. If you have any comments and suggestions please email me * * max[at]remoteSOS[dot]com * * * ****************************************************************************** */ #ifndef LRTIMER_H__ #define LRTIMER_H__ #ifndef _WIN32_WINNT #define _WIN32_WINNT 0x0500 #endif // compile with: /MT /D "_X86_" /c // processor: x86 #include <windows.h> #include <process.h> /* _beginthread, _endthread */ #include <stdio.h> #include <assert.h> // define a second in terms of 100ns - used with waitable timer API #define _SECOND 10000 typedef VOID (*LRTCallbackEventProc)(VOID*); class LRTimer { public: // default constructor with 1 second interval LRTimer(DWORD dwInterval=1000); // default destructor ~LRTimer(); // starts timer by creating new thread. interval must be set earlier VOID start(); // starts timer with given interval in miliseconds VOID start(DWORD _interval_ms); // stops the timer VOID stop(); // sets time interval in miliseconds VOID setInterval(DWORD _interval_ms); // returns time interval in ms DWORD getInterval(); // sets function that will be called on time expiration VOID setCallbackProc( LRTCallbackEventProc pcbEventProc, VOID* pcbParam ); // returns true if LRtimer is currently running BOOL isRunning(); // It should be used if the worker class will use CRT functions static HANDLE CrtCreateThread(LPSECURITY_ATTRIBUTES lpsa, DWORD dwStackSize, LPTHREAD_START_ROUTINE pfnThreadProc, void *pvParam, DWORD dwCreationFlags, DWORD *pdwThreadId) throw() { // sanity check for pdwThreadId assert(sizeof(DWORD) == sizeof(unsigned int)); // _beginthreadex calls CreateThread which will set the last error value before it returns return (HANDLE) _beginthreadex(lpsa, dwStackSize, (unsigned int (__stdcall *)(void *)) pfnThreadProc, pvParam, dwCreationFlags, (unsigned int *) pdwThreadId); } private: DWORD m_dwInterval; // interval between alarms LRTCallbackEventProc m_pCallback; // pointer to user callback function VOID *m_pcbParam; // pointer to user callback parameter BOOL m_bRunning; // timer running state HANDLE m_hTimerThread; // handle to timer thread DWORD m_iID; // timer thread id - added for compatibility with Win95/98 // timer clock |
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