DD2-monitor/funcs.c

/*
 * funcs.c
 */

#include  <stdio.h>
#include <unistd.h>
#include  <stdlib.h>
#include  <string.h>
#include  <time.h>
#include  <sys/time.h>

#include  "funcs.h"

extern int verbosity;

/* --------------------------------------------------------------- */
int seed_my_rand(int foo)
{
long	v1, v2;

v1 = getpid();		v2 = time(NULL);

return v1 ^ v2;
}
/* --------------------------------------------------------------- */

int random1000(int type)
{
int         value;
if (verbosity)
    fprintf(stderr, ">>> %s(%d)\n", __func__, type);

switch (type) {
	case 0:
		value = rand() % 1000;
		break;
	case 1:
		value = (rand()%1000 + rand()%1000) / 2;
		break;
	default:
		value = -1;
		break;
	}

return value;
}

/* --------------------------------------------------------------- */

double dtime(void)
{
struct timeval tv;
int         foo;

foo = gettimeofday(&tv, NULL);
if (foo) fprintf(stderr, "got %d in %s\n", foo, __func__);

return (double)tv.tv_sec + (double)tv.tv_usec / 1e6;
}

/* --------------------------------------------------------------- */

int get_loadavg(double *where)
{
FILE		*fp;
double		loads[3];
int		foo;

if ( ! (fp=fopen("/proc/loadavg", "r")) ) {
	perror("read loadavg");
	return -1;
	}

foo = fscanf(fp, "%lf %lf %lf", loads, loads+1, loads+2);
if (3 != foo) fprintf(stderr, "%s : read %d vals\n", __func__, foo);

memcpy(where, loads, 3 * sizeof(double));

fclose(fp);

return 0;	
}

/* --------------------------------------------------------------- */