source: trunk/packages/vizservers/nanovis/NvEventLog.cpp @ 1200

#include "config.h"
#include <stdio.h>
#include <assert.h>
#include <sys/time.h>
#include <sys/types.h>
#include <unistd.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include "NvEventLog.h"
#include "nanovis.h"


#ifdef XINETD
FILE* xinetd_log;
#endif

FILE* event_log;
double cur_time;        //in seconds

#ifdef XINETD
void NvInitService()
{
    const char* user = getenv("USER");
    char* logName = NULL;
    int logNameLen = 0;

    if (user == NULL) {
        logNameLen = 20+1;
        logName = (char*) calloc(logNameLen,sizeof(char));
        strncpy(logName,"/tmp/nanovis_log.txt",logNameLen);
    }
    else {
        logNameLen = 17+1+strlen(user);
        logName = (char*) calloc(logNameLen,sizeof(char));
        strncpy(logName,"/tmp/nanovis_log_",logNameLen);
        strncat(logName,user,strlen(user));
    }

    if (!NanoVis::debug_flag) {
        //open log and map stderr to log file
        xinetd_log = fopen(logName, "w");
        close(2);
        dup2(fileno(xinetd_log), 2);
        dup2(2,1);
        //flush junk
        fflush(stdout);
        fflush(stderr);
    }

    // clean up malloc'd memory
    if (logName != NULL) {
        free(logName);
    }
}

void NvExitService()
{
    //close log file
    if (xinetd_log != NULL) {
        fclose(xinetd_log);
        xinetd_log = NULL;
    }
}
#endif

void NvInitEventLog()
{
    event_log = fopen("event.txt", "w");
    assert(event_log!=0);

    struct timeval time;
    gettimeofday(&time, NULL);
    cur_time = time.tv_sec*1000. + time.tv_usec/1000.;
}

void NvExitEventLog()
{
    fclose(event_log);
}

double NvGetTimeInterval()
{
    struct timeval time;
    gettimeofday(&time, NULL);
    double new_time = time.tv_sec*1000. + time.tv_usec/1000.;

    double interval = new_time - cur_time;
    cur_time = new_time;
    return interval;
}