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#include <stdlib.h>
#include <stdio.h>
#include <math.h>
#include <limits.h>
#include "efence.h"
/*
* This is a simple program to exercise the allocator. It allocates and frees
* memory in a pseudo-random fashion. It should run silently, using up time
* and resources on your system until you stop it or until it has gone
* through TEST_DURATION (or the argument) iterations of the loop.
*/
extern C_LINKAGE double drand48(void); /* For pre-ANSI C systems */
#define POOL_SIZE 1024
#define LARGEST_BUFFER 30000
#define TEST_DURATION 1000000
void * pool[POOL_SIZE];
#ifdef FAKE_DRAND48
/*
* Add -DFAKE_DRAND48 to your compile flags if your system doesn't
* provide drand48().
*/
#ifndef ULONG_MAX
#define ULONG_MAX ~(1L)
#endif
double
drand48(void)
{
return (random() / (double)ULONG_MAX);
}
#endif
int
main(int argc, char * * argv)
{
int count = 0;
int duration = TEST_DURATION;
if ( argc >= 2 )
duration = atoi(argv[1]);
for ( ; count < duration; count++ ) {
void * * element = &pool[(int)(drand48() * POOL_SIZE)];
size_t size = (size_t)(drand48() * (LARGEST_BUFFER + 1));
if ( *element ) {
free( *element );
*element = 0;
}
else if ( size > 0 ) {
*element = malloc(size);
}
}
return 0;
}
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