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