log.c

公司业务而自己写的网关通讯程序,网关是平台的.不过对OCI有兴趣的不妨看看. Oracle Oci select exec update 多线程 IVR 网关通讯 linux 日志文件操作

#include <stdio.h>
#include "log.h"
#include <time.h>
#include <pthread.h>
static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;

char lastdate[20];
FILE *pLogFile=NULL;

void log(char* loglevel,char* logmsg,int toscreen){
    struct tm *tm_ptr, timestruct;
    time_t the_time;
    char tmpbuf[1024];
    char *result;

    (void) time(&the_time);
    tm_ptr = localtime(&the_time);
    strftime(tmpbuf, 50, "%Y-%m-%d", tm_ptr);
    
    strcat(tmpbuf,".");
    strcat(tmpbuf,loglevel);

	pthread_mutex_lock(&mutex);
	    if(!pLogFile || strcmp(lastdate,tmpbuf)!=0){
			if(pLogFile){
				fclose(pLogFile);
			}
			strcpy(lastdate,tmpbuf);
			pLogFile = fopen(tmpbuf,"a");
		}
	    if(!pLogFile){
	    	printf("can not open logfile:%s\n",tmpbuf);
			pthread_mutex_unlock(&mutex);
    	
	    	return;
	    }
		strftime( tmpbuf, 1024,
			"[%Y-%m-%d %H:%M:%S] ", tm_ptr );
		strcat(tmpbuf,logmsg);
		strcat(tmpbuf,"\n");
		if(toscreen)printf(tmpbuf);
		fwrite(tmpbuf,sizeof(char),strlen(tmpbuf),pLogFile);
	
	pthread_mutex_unlock(&mutex);
	
    return;
}

void closelog(){
	if(!pLogFile){
		fclose(pLogFile);
	}	
}