64 lines
1.3 KiB
C
64 lines
1.3 KiB
C
/* $NetBSD: tstheap.c,v 1.2 2003/12/04 16:23:34 drochner Exp $ */
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#include <stdlib.h>
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#include <stdio.h>
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#include <math.h>
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#include <limits.h>
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#include "efence.h"
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/*
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* This is a simple program to exercise the allocator. It allocates and frees
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* memory in a pseudo-random fashion. It should run silently, using up time
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* and resources on your system until you stop it or until it has gone
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* through TEST_DURATION (or the argument) iterations of the loop.
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*/
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extern C_LINKAGE double drand48(void); /* For pre-ANSI C systems */
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#define POOL_SIZE 1024
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#define LARGEST_BUFFER 30000
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#define TEST_DURATION 1000000
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void * pool[POOL_SIZE];
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#ifdef FAKE_DRAND48
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/*
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* Add -DFAKE_DRAND48 to your compile flags if your system doesn't
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* provide drand48().
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*/
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#ifndef ULONG_MAX
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#define ULONG_MAX ~(1L)
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#endif
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double
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drand48(void)
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{
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return (random() / (double)ULONG_MAX);
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}
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#endif
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int
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main(int argc, char * * argv)
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{
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int count = 0;
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int duration = TEST_DURATION;
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if ( argc >= 2 )
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duration = atoi(argv[1]);
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for ( ; count < duration; count++ ) {
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void * * element = &pool[(int)(drand48() * POOL_SIZE)];
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size_t size = (size_t)(drand48() * (LARGEST_BUFFER + 1));
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if ( *element ) {
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free( *element );
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*element = 0;
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}
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else if ( size > 0 ) {
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*element = malloc(size);
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}
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}
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return 0;
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}
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