#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
#define MAXLOGSIZE 20000000
#define MAXLINSIZE 16000
#include <time.h>
#include <sys/timeb.h>
#include <stdarg.h>
char
logfilename1[]=
"MyLog1.log"
;
char
logfilename2[]=
"MyLog2.log"
;
static
char
logstr[MAXLINSIZE+1];
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
;
_vsnprintf(logstr,MAXLINSIZE,pszFmt,argp);
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);
}
}
else
{
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);
}
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\n"
,i, __FILE__, __LINE__);
}
#ifdef WIN32
DeleteCriticalSection(&cs_log);
#else
pthread_mutex_destroy(&cs_log);
#endif
return
0;
}