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/*
* Asterisk -- An open source telephony toolkit.
*
* Copyright (C) 2009, Digium, Inc.
*
* Russell Bryant <russell@digium.com>
*
* See http://www.asterisk.org for more information about
* the Asterisk project. Please do not directly contact
* any of the maintainers of this project for assistance;
* the project provides a web site, mailing lists and IRC
* channels for your use.
*
* This program is free software, distributed under the terms of
* the GNU General Public License Version 2. See the LICENSE file
* at the top of the source tree.
*/
/*! \file
*
* \brief Heap data structure test module
*
* \author Russell Bryant <russell@digium.com>
*/
/*** MODULEINFO
<defaultenabled>no</defaultenabled>
***/
#include "asterisk.h"
ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
#include "asterisk/module.h"
#include "asterisk/cli.h"
#include "asterisk/utils.h"
#include "asterisk/heap.h"
struct node {
long val;
size_t index;
};
static int node_cmp(void *_n1, void *_n2)
{
struct node *n1 = _n1;
struct node *n2 = _n2;
if (n1->val < n2->val) {
return -1;
} else if (n1->val == n2->val) {
return 0;
} else {
return 1;
}
}
static int test1(int fd)
{
struct ast_heap *h;
struct node *obj;
struct node nodes[3] = {
{ 1, },
{ 2, },
{ 3, },
};
if (!(h = ast_heap_create(8, node_cmp, offsetof(struct node, index)))) {
return -1;
}
/* Pushing 1 2 3, and then popping 3 elements */
ast_cli(fd, "Test #1 - Push a few elements onto a heap and make sure that they "
"come back off in the right order.\n");
ast_heap_push(h, &nodes[0]);
ast_heap_push(h, &nodes[1]);
ast_heap_push(h, &nodes[2]);
obj = ast_heap_pop(h);
if (obj->val != 3) {
return -2;
}
obj = ast_heap_pop(h);
if (obj->val != 2) {
return -3;
}
obj = ast_heap_pop(h);
if (obj->val != 1) {
return -4;
}
obj = ast_heap_pop(h);
if (obj) {
return -5;
}
h = ast_heap_destroy(h);
ast_cli(fd, "Test #1 successful.\n");
return 0;
}
static int test2(int fd)
{
struct ast_heap *h = NULL;
static const unsigned int one_million = 1000000;
struct node *nodes = NULL;
struct node *node;
unsigned int i = one_million;
long last = LONG_MAX, cur;
int res = 0;
ast_cli(fd, "Test #2 - Push a million random elements on to a heap, "
"verify that the heap has been properly constructed, "
"and then ensure that the elements are come back off in the proper order\n");
if (!(nodes = ast_malloc(one_million * sizeof(*node)))) {
res = -1;
goto return_cleanup;
}
if (!(h = ast_heap_create(20, node_cmp, offsetof(struct node, index)))) {
res = -2;
goto return_cleanup;
}
while (i--) {
nodes[i].val = ast_random();
ast_heap_push(h, &nodes[i]);
}
if (ast_heap_verify(h)) {
res = -3;
goto return_cleanup;
}
i = 0;
while ((node = ast_heap_pop(h))) {
cur = node->val;
if (cur > last) {
ast_cli(fd, "i: %u, cur: %ld, last: %ld\n", i, cur, last);
res = -4;
goto return_cleanup;
}
last = cur;
i++;
}
if (i != one_million) {
ast_cli(fd, "Stopped popping off after only getting %u nodes\n", i);
res = -5;
goto return_cleanup;
}
ast_cli(fd, "Test #2 successful.\n");
return_cleanup:
if (h) {
h = ast_heap_destroy(h);
}
if (nodes) {
ast_free(nodes);
}
return res;
}
static char *handle_cli_heap_test(struct ast_cli_entry *e, int cmd, struct ast_cli_args *a)
{
int res;
switch (cmd) {
case CLI_INIT:
e->command = "heap test";
e->usage = ""
"Usage: heap test\n"
"";
return NULL;
case CLI_GENERATE:
return NULL;
}
if (a->argc != e->args) {
return CLI_SHOWUSAGE;
}
if ((res = test1(a->fd))) {
ast_cli(a->fd, "Test 1 failed! (%d)\n", res);
return CLI_FAILURE;
}
if ((res = test2(a->fd))) {
ast_cli(a->fd, "Test 2 failed! (%d)\n", res);
return CLI_FAILURE;
}
return CLI_SUCCESS;
}
static struct ast_cli_entry cli_heap[] = {
AST_CLI_DEFINE(handle_cli_heap_test, "Test the heap implementation"),
};
static int unload_module(void)
{
ast_cli_unregister_multiple(cli_heap, ARRAY_LEN(cli_heap));
return 0;
}
static int load_module(void)
{
ast_cli_register_multiple(cli_heap, ARRAY_LEN(cli_heap));
return AST_MODULE_LOAD_SUCCESS;
}
AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "Heap test module");
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