c++单例模式线程日志类

#include "LogTask.h" LogTask *LogTask::m_Task = NULL; LogTask *LogTask::GetInstance() { if (m_Task == NULL) { m_Task = new LogTask(); } return m_Task; } void LogTask::RemoveInstance() { if (m_Task != NULL) { delete m_Task; } } LogTask::LogTask() { InitializeCriticalSection(&m_section); m_event = CreateEvent(NULL,true,false,NULL); m_level = LEVEL_ERROR; m_fLog = NULL; m_bExit = false; } LogTask::LogTask(const LogTask&) { } LogTask& LogTask::operator=(const LogTask&) { return *m_Task; } LogTask::~LogTask() { m_bExit = true; SetEvent(m_event); if (m_fLog) { fclose(m_fLog); } join(); CloseHandle(m_event); DeleteCriticalSection(&m_section); } void LogTask::SetLogLevel(int level) { m_level = level; if (m_level > 1) { char filepath[MAX_PATH+1] = {0}; if (GetModuleFileName(NULL,filepath,MAX_PATH) == 0) { printf("LogTask GetModuleFileName err %d.\n",GetLastError()); } else { if (strcmp(filepath, "") != 0) { string strpath = filepath; int pos = strpath.rfind("\\"); strpath = strpath.substr(0,pos+1); strpath += "log.txt"; m_fLog = fopen(strpath.c_str(),"a+"); } } } } void LogTask::LOG_PRINT(int level, char* cFormat, ...) { va_list args = NULL; va_start(args, cFormat); m_Task->PushLog(level,cFormat,args); va_end(args); } int LogTask::PushLog(int level, char* cFormat, va_list vlist) { if (level <= m_level) { char levelstr[20]; switch(level) { case LEVEL_DEBUG: strcpy(levelstr,"DEBUG"); break; case LEVEL_ERROR: strcpy(levelstr,"ERROR"); break; case LEVEL_INFOR: default: strcpy(levelstr,"INFOR"); break; } char logbuf[2048]; SYSTEMTIME sysTime; GetLocalTime(&sysTime); sprintf(logbuf,"%4d/%02d/%02d %02d:%02d:%02d.%03d [%s]",sysTime.wYear,sysTime.wMonth, sysTime.wDay,sysTime.wHour,sysTime.wMinute,sysTime.wSecond,sysTime.wMilliseconds,levelstr); int lens = strlen(logbuf); vsprintf_s(logbuf+lens,2047-lens,cFormat,vlist); string LogString(logbuf); //临界区 EnterCriticalSection(&m_section); m_LogQue.push(LogString); SetEvent(m_event); LeaveCriticalSection(&m_section); } return 0; } void LogTask::svc() { while(!m_bExit) { WaitForSingleObject(m_event,INFINITE); string LogString; EnterCriticalSection(&m_section); if (!m_LogQue.empty()) { LogString = m_LogQue.front(); m_LogQue.pop(); } if (m_LogQue.empty()) { ResetEvent(m_event); } LeaveCriticalSection(&m_section); if (m_fLog && !LogString.empty()) { fprintf(m_fLog,"%s\n",LogString.c_str()); fflush(m_fLog); printf("%s\n",LogString.c_str()); } } }