1 /*
2 * File: semaphore3.c
3 *
4 *
5 * --------------------------------------------------------------------------
6 *
7 * Pthreads-win32 - POSIX Threads Library for Win32
8 * Copyright(C) 1998 John E. Bossom
9 * Copyright(C) 1999,2005 Pthreads-win32 contributors
10 *
11 * Contact Email: rpj@callisto.canberra.edu.au
12 *
13 * The current list of contributors is contained
14 * in the file CONTRIBUTORS included with the source
15 * code distribution. The list can also be seen at the
16 * following World Wide Web location:
17 * http://sources.redhat.com/pthreads-win32/contributors.html
18 *
19 * This library is free software; you can redistribute it and/or
20 * modify it under the terms of the GNU Lesser General Public
21 * License as published by the Free Software Foundation; either
22 * version 2 of the License, or (at your option) any later version.
23 *
24 * This library is distributed in the hope that it will be useful,
25 * but WITHOUT ANY WARRANTY; without even the implied warranty of
26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
27 * Lesser General Public License for more details.
28 *
29 * You should have received a copy of the GNU Lesser General Public
30 * License along with this library in the file COPYING.LIB;
31 * if not, write to the Free Software Foundation, Inc.,
32 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
33 *
34 * --------------------------------------------------------------------------
35 *
36 * Test Synopsis: Verify sem_getvalue returns the correct number of waiters.
37 * -
38 *
39 * Test Method (Validation or Falsification):
40 * - Validation
41 *
42 * Requirements Tested:
43 * -
44 *
45 * Features Tested:
46 * -
47 *
48 * Cases Tested:
49 * -
50 *
51 * Description:
52 * -
53 *
54 * Environment:
55 * -
56 *
57 * Input:
58 * - None.
59 *
60 * Output:
61 * - File name, Line number, and failed expression on failure.
62 * - No output on success.
63 *
64 * Assumptions:
65 * -
66 *
67 * Pass Criteria:
68 * - Process returns zero exit status.
69 *
70 * Fail Criteria:
71 * - Process returns non-zero exit status.
72 */
73
74 #include "test.h"
75
76 #define MAX_COUNT 100
77
78 sem_t s;
79
80 void *
thr(void * arg)81 thr (void * arg)
82 {
83 assert(sem_wait(&s) == 0);
84 assert(pthread_detach(pthread_self()) == 0);
85 return NULL;
86 }
87
88 int
main()89 main()
90 {
91 int value = 0;
92 int i;
93 pthread_t t[MAX_COUNT+1];
94
95 assert(sem_init(&s, PTHREAD_PROCESS_PRIVATE, 0) == 0);
96 assert(sem_getvalue(&s, &value) == 0);
97 // printf("Value = %d\n", value); fflush(stdout);
98 assert(value == 0);
99
100 for (i = 1; i <= MAX_COUNT; i++)
101 {
102 assert(pthread_create(&t[i], NULL, thr, NULL) == 0);
103 do {
104 sched_yield();
105 assert(sem_getvalue(&s, &value) == 0);
106 } while (value != -i);
107 // printf("Value = %d\n", value); fflush(stdout);
108 assert(-value == i);
109 }
110
111 for (i = MAX_COUNT - 1; i >= 0; i--)
112 {
113 assert(sem_post(&s) == 0);
114 assert(sem_getvalue(&s, &value) == 0);
115 // printf("Value = %d\n", value); fflush(stdout);
116 assert(-value == i);
117 }
118 fprintf (stderr, "Complete\n"); fflush (stderr);
119 return 0;
120 }
121
122