tests/stress.c

   1 /*
   2  * libusbx stress test program to perform simple stress tests
   3  * Copyright © 2012 Toby Gray <toby.gray@realvnc.com>
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2.1 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  18  */
  19
  20 #include <stdio.h>
  21 #include <string.h>
  22 #include <memory.h>
  23
  24 #include "libusb.h"
  25 #include "libusbx_testlib.h"
  26
  27 /** Test that creates and destroys a single concurrent context
  28  * 10000 times. */
  29 static libusbx_testlib_result test_init_and_exit(libusbx_testlib_ctx * tctx)
  30 {
  31         libusb_context * ctx = NULL;
  32         int i;
  33         for (i = 0; i < 10000; ++i) {
  34                 int r = libusb_init(&ctx);
  35                 if (r != LIBUSB_SUCCESS) {
  36                         libusbx_testlib_logf(tctx,
  37                                 "Failed to init libusb on iteration %d: %d",
  38                                 i, r);
  39                         return TEST_STATUS_FAILURE;
  40                 }
  41                 libusb_exit(ctx);
  42                 ctx = NULL;
  43         }
  44
  45         return TEST_STATUS_SUCCESS;
  46 }
  47
  48 /** Tests that devices can be listed 1000 times. */
  49 static libusbx_testlib_result test_get_device_list(libusbx_testlib_ctx * tctx)
  50 {
  51         libusb_context * ctx = NULL;
  52         int r, i;
  53         r = libusb_init(&ctx);
  54         if (r != LIBUSB_SUCCESS) {
  55                 libusbx_testlib_logf(tctx, "Failed to init libusb: %d", r);
  56                 return TEST_STATUS_FAILURE;
  57         }
  58         for (i = 0; i < 1000; ++i) {
  59                 libusb_device ** device_list;
  60                 ssize_t list_size = libusb_get_device_list(ctx, &device_list);
  61                 if (list_size < 0 || device_list == NULL) {
  62                         libusbx_testlib_logf(tctx,
  63                                 "Failed to get device list on iteration %d: %d (%p)",
  64                                 i, -list_size, device_list);
  65                         return TEST_STATUS_FAILURE;
  66                 }
  67                 libusb_free_device_list(device_list, 1);
  68         }
  69         libusb_exit(ctx);
  70         return TEST_STATUS_SUCCESS;
  71 }
  72
  73 /** Tests that 100 concurrent device lists can be open at a time. */
  74 static libusbx_testlib_result test_many_device_lists(libusbx_testlib_ctx * tctx)
  75 {
  76 #define LIST_COUNT 100
  77         libusb_context * ctx = NULL;
  78         libusb_device ** device_lists[LIST_COUNT];
  79         int r, i;
  80         memset(device_lists, 0, sizeof(device_lists));
  81
  82         r = libusb_init(&ctx);
  83         if (r != LIBUSB_SUCCESS) {
  84                 libusbx_testlib_logf(tctx, "Failed to init libusb: %d", r);
  85                 return TEST_STATUS_FAILURE;
  86         }
  87
  88         /* Create the 100 device lists. */
  89         for (i = 0; i < LIST_COUNT; ++i) {
  90                 ssize_t list_size = libusb_get_device_list(ctx, &(device_lists[i]));
  91                 if (list_size < 0 || device_lists[i] == NULL) {
  92                         libusbx_testlib_logf(tctx,
  93                                 "Failed to get device list on iteration %d: %d (%p)",
  94                                 i, -list_size, device_lists[i]);
  95                         return TEST_STATUS_FAILURE;
  96                 }
  97         }
  98
  99         /* Destroy the 100 device lists. */
 100         for (i = 0; i < LIST_COUNT; ++i) {
 101                 if (device_lists[i]) {
 102                         libusb_free_device_list(device_lists[i], 1);
 103                         device_lists[i] = NULL;
 104                 }
 105         }
 106
 107         libusb_exit(ctx);
 108         return TEST_STATUS_SUCCESS;
 109 #undef LIST_COUNT
 110 }
 111
 112 /** Tests that the default context (used for various things including
 113  * logging) works correctly when the first context created in a
 114  * process is destroyed. */
 115 static libusbx_testlib_result test_default_context_change(libusbx_testlib_ctx * tctx)
 116 {
 117         libusb_context * ctx = NULL;
 118         int r, i;
 119
 120         for (i = 0; i < 100; ++i) {
 121                 /* First create a new context */
 122                 r = libusb_init(&ctx);
 123                 if (r != LIBUSB_SUCCESS) {
 124                         libusbx_testlib_logf(tctx, "Failed to init libusb: %d", r);
 125                         return TEST_STATUS_FAILURE;
 126                 }
 127
 128                 /* Enable debug output, to be sure to use the context */
 129                 libusb_set_debug(NULL, LIBUSB_LOG_LEVEL_DEBUG);
 130                 libusb_set_debug(ctx, LIBUSB_LOG_LEVEL_DEBUG);
 131
 132                 /* Now create a reference to the default context */
 133                 r = libusb_init(NULL);
 134                 if (r != LIBUSB_SUCCESS) {
 135                         libusbx_testlib_logf(tctx, "Failed to init libusb: %d", r);
 136                         return TEST_STATUS_FAILURE;
 137                 }
 138
 139                 /* Destroy the first context */
 140                 libusb_exit(ctx);
 141                 /* Destroy the default context */
 142                 libusb_exit(NULL);
 143         }
 144
 145         return TEST_STATUS_SUCCESS;
 146 }
 147
 148 /* Fill in the list of tests. */
 149 static const libusbx_testlib_test tests[] = {
 150         {"init_and_exit", &test_init_and_exit},
 151         {"get_device_list", &test_get_device_list},
 152         {"many_device_lists", &test_many_device_lists},
 153         {"default_context_change", &test_default_context_change},
 154         LIBUSBX_NULL_TEST
 155 };
 156
 157 int main (int argc, char ** argv)
 158 {
 159         return libusbx_testlib_run_tests(argc, argv, tests);
 160 }