1/* Copyright libuv project contributors. All rights reserved.
2*
3* Permission is hereby granted, free of charge, to any person obtaining a copy
4* of this software and associated documentation files (the "Software"), to
5* deal in the Software without restriction, including without limitation the
6* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
7* sell copies of the Software, and to permit persons to whom the Software is
8* furnished to do so, subject to the following conditions:
9*
10* The above copyright notice and this permission notice shall be included in
11* all copies or substantial portions of the Software.
12*
13* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
16* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
17* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
18* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
19* IN THE SOFTWARE.
20*/
21
22
23#include "uv.h"
24#include "task.h"
25
26#include <string.h>
27
28#ifdef __APPLE__
29# define NUM_ITERATIONS 5
30#else
31# define NUM_ITERATIONS 50
32#endif
33
34static const char* titles[] = {
35  "8L2NY0Kdj0XyNFZnmUZigIOfcWjyNr0SkMmUhKw99VLUsZFrvCQQC3XIRfNR8pjyMjXObllled",
36  "jUAcscJN49oLSN8GdmXj2Wo34XX2T2vp2j5khfajNQarlOulp57cE130yiY53ipJFnPyTn5i82",
37  "9niCI5icXGFS72XudhXqo5alftmZ1tpE7B3cwUmrq0CCDjC84FzBNB8XAHqvpNQfI2QAQG6ztT",
38  "n8qXVXuG6IEHDpabJgTEiwtpY6LHMZ8MgznnMpdHARu5EywufA6hcBaQfetb0YhEsK0ykDd7JU"
39};
40
41static void getter_thread_body(void* arg) {
42  uv_sem_t* getter_sem;
43  char buffer[512];
44  size_t len;
45
46  getter_sem = arg;
47
48  while (UV_EAGAIN == uv_sem_trywait(getter_sem)) {
49    ASSERT_OK(uv_get_process_title(buffer, sizeof(buffer)));
50
51    /* The maximum size of the process title on some platforms depends on
52     * the total size of the argv vector. It's therefore possible to read
53     * back a title that's shorter than what we submitted.
54     */
55    len = strlen(buffer);
56    ASSERT_GT(len, 0);
57
58    ASSERT(
59      0 == strncmp(buffer, titles[0], len) ||
60      0 == strncmp(buffer, titles[1], len) ||
61      0 == strncmp(buffer, titles[2], len) ||
62      0 == strncmp(buffer, titles[3], len));
63
64    uv_sleep(0);
65  }
66}
67
68
69static void setter_thread_body(void* arg) {
70  int i;
71
72  for (i = 0; i < NUM_ITERATIONS; i++) {
73    ASSERT_OK(uv_set_process_title(titles[0]));
74    ASSERT_OK(uv_set_process_title(titles[1]));
75    ASSERT_OK(uv_set_process_title(titles[2]));
76    ASSERT_OK(uv_set_process_title(titles[3]));
77  }
78}
79
80
81TEST_IMPL(process_title_threadsafe) {
82  uv_thread_t setter_threads[4];
83  uv_thread_t getter_thread;
84  uv_sem_t getter_sem;
85  int i;
86
87#if defined(__sun) || defined(__CYGWIN__) || defined(__MSYS__) || \
88    defined(__MVS__) || defined(__PASE__)
89  RETURN_SKIP("uv_(get|set)_process_title is not implemented.");
90#endif
91
92  ASSERT_OK(uv_set_process_title(titles[0]));
93
94  ASSERT_OK(uv_sem_init(&getter_sem, 0));
95  ASSERT_OK(uv_thread_create(&getter_thread, getter_thread_body, &getter_sem));
96
97  for (i = 0; i < (int) ARRAY_SIZE(setter_threads); i++)
98    ASSERT_OK(uv_thread_create(&setter_threads[i], setter_thread_body, NULL));
99
100  for (i = 0; i < (int) ARRAY_SIZE(setter_threads); i++)
101    ASSERT_OK(uv_thread_join(&setter_threads[i]));
102
103  uv_sem_post(&getter_sem);
104  ASSERT_OK(uv_thread_join(&getter_thread));
105  uv_sem_destroy(&getter_sem);
106
107  return 0;
108}
109