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  • win32/linux 线程 log

    原文

    #include <stdio.h>
    #include <stdlib.h>
    #include <string.h>
    #ifdef WIN32
        #include <windows.h>
        #include <io.h>
    #else
        #include <unistd.h>
        #include <sys/time.h>
        #include <pthread.h>
        #define  CRITICAL_SECTION   pthread_mutex_t
        #define  _vsnprintf         vsnprintf
    #endif
    //Log{
    #define MAXLOGSIZE 100000000
    #define ARRSIZE(x) (sizeof(x)/sizeof(x[0]))
    #include <time.h>
    #include <sys/timeb.h>
    #include <stdarg.h>
    char logfilename1[]="MyLog1.log";
    char logfilename2[]="MyLog2.log";
    char logstr[16000];
    char datestr[16];
    char timestr[16];
    char mss[4];
    CRITICAL_SECTION cs_log;
    FILE *flog;
    #ifdef WIN32
    void Lock(CRITICAL_SECTION *l) {
        EnterCriticalSection(l);
    }
    void Unlock(CRITICAL_SECTION *l) {
        LeaveCriticalSection(l);
    }
    #else
    void Lock(CRITICAL_SECTION *l) {
        pthread_mutex_lock(l);
    }
    void Unlock(CRITICAL_SECTION *l) {
        pthread_mutex_unlock(l);
    }
    #endif
    void LogV(const char *pszFmt,va_list argp) {
        struct tm *now;
        struct timeb tb;
    
        if (NULL==pszFmt||0==pszFmt[0]) return;
        if (-1==_vsnprintf(logstr,ARRSIZE(logstr),pszFmt,argp)) logstr[ARRSIZE(logstr)-1]=0;
        ftime(&tb);
        now=localtime(&tb.time);
        sprintf(datestr,"%04d-%02d-%02d",now->tm_year+1900,now->tm_mon+1,now->tm_mday);
        sprintf(timestr,"%02d:%02d:%02d",now->tm_hour     ,now->tm_min  ,now->tm_sec );
        sprintf(mss,"%03d",tb.millitm);
        printf("%s %s.%s %s",datestr,timestr,mss,logstr);
        flog=fopen(logfilename1,"a");
        if (NULL!=flog) {
            fprintf(flog,"%s %s.%s %s",datestr,timestr,mss,logstr);
            if (ftell(flog)>MAXLOGSIZE) {
                fclose(flog);
                if (rename(logfilename1,logfilename2)) {
                    remove(logfilename2);
                    rename(logfilename1,logfilename2);
                }
                flog=fopen(logfilename1,"a");
                if (NULL==flog) return;
            }
            fclose(flog);
        }
    }
    void Log(const char *pszFmt,...) {
        va_list argp;
    
        Lock(&cs_log);
        va_start(argp,pszFmt);
        LogV(pszFmt,argp);
        va_end(argp);
        Unlock(&cs_log);
    }
    //Log}
    int main(int argc,char * argv[]) {
        int i;
    #ifdef WIN32
        InitializeCriticalSection(&cs_log);
    #else
        pthread_mutex_init(&cs_log,NULL);
    #endif
        for (i=0;i<10000;i++) {
            Log("This is a Log %04d from FILE:%s LINE:%d
    ",i, __FILE__, __LINE__);
        }
    #ifdef WIN32
        DeleteCriticalSection(&cs_log);
    #else
        pthread_mutex_destroy(&cs_log);
    #endif
        return 0;
    }
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  • 原文地址:https://www.cnblogs.com/hei-hei-hei/p/7345768.html
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