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5a437975 DE |
1 | /* Test case for hand function calls in multi-threaded program. |
2 | ||
32d0add0 | 3 | Copyright 2008-2015 Free Software Foundation, Inc. |
5a437975 DE |
4 | |
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #include <pthread.h> | |
21 | #include <stdio.h> | |
22 | #include <stdlib.h> | |
23 | #include <time.h> | |
24 | #include <unistd.h> | |
25 | ||
26 | #ifndef NR_THREADS | |
27 | #define NR_THREADS 4 | |
28 | #endif | |
29 | ||
30 | int thread_count; | |
31 | ||
32 | pthread_mutex_t thread_count_mutex; | |
33 | ||
34 | pthread_cond_t thread_count_condvar; | |
35 | ||
36 | void | |
37 | incr_thread_count (void) | |
38 | { | |
39 | pthread_mutex_lock (&thread_count_mutex); | |
40 | ++thread_count; | |
41 | if (thread_count == NR_THREADS) | |
42 | pthread_cond_signal (&thread_count_condvar); | |
43 | pthread_mutex_unlock (&thread_count_mutex); | |
44 | } | |
45 | ||
46 | void | |
47 | cond_wait (pthread_cond_t *cond, pthread_mutex_t *mut) | |
48 | { | |
49 | pthread_mutex_lock (mut); | |
50 | pthread_cond_wait (cond, mut); | |
51 | pthread_mutex_unlock (mut); | |
52 | } | |
53 | ||
54 | void | |
55 | noreturn (void) | |
56 | { | |
57 | pthread_mutex_t mut; | |
58 | pthread_cond_t cond; | |
59 | ||
60 | pthread_mutex_init (&mut, NULL); | |
61 | pthread_cond_init (&cond, NULL); | |
62 | ||
63 | /* Wait for a condition that will never be signaled, so we effectively | |
64 | block the thread here. */ | |
65 | cond_wait (&cond, &mut); | |
66 | } | |
67 | ||
68 | void * | |
69 | forever_pthread (void *unused) | |
70 | { | |
71 | incr_thread_count (); | |
72 | noreturn (); | |
73 | } | |
74 | ||
75 | void | |
76 | hand_call (void) | |
77 | { | |
78 | } | |
79 | ||
80 | /* Wait until all threads are running. */ | |
81 | ||
82 | void | |
83 | wait_all_threads_running (void) | |
84 | { | |
85 | pthread_mutex_lock (&thread_count_mutex); | |
86 | if (thread_count == NR_THREADS) | |
87 | { | |
88 | pthread_mutex_unlock (&thread_count_mutex); | |
89 | return; | |
90 | } | |
91 | pthread_cond_wait (&thread_count_condvar, &thread_count_mutex); | |
92 | if (thread_count == NR_THREADS) | |
93 | { | |
94 | pthread_mutex_unlock (&thread_count_mutex); | |
95 | return; | |
96 | } | |
97 | pthread_mutex_unlock (&thread_count_mutex); | |
98 | printf ("failed waiting for all threads to start\n"); | |
99 | abort (); | |
100 | } | |
101 | ||
102 | /* Called when all threads are running. | |
103 | Easy place for a breakpoint. */ | |
104 | ||
105 | void | |
106 | all_threads_running (void) | |
107 | { | |
108 | } | |
109 | ||
110 | int | |
111 | main (void) | |
112 | { | |
113 | pthread_t forever[NR_THREADS]; | |
114 | int i; | |
115 | ||
116 | pthread_mutex_init (&thread_count_mutex, NULL); | |
117 | pthread_cond_init (&thread_count_condvar, NULL); | |
118 | ||
119 | for (i = 0; i < NR_THREADS; ++i) | |
120 | pthread_create (&forever[i], NULL, forever_pthread, NULL); | |
121 | ||
122 | wait_all_threads_running (); | |
123 | all_threads_running (); | |
124 | ||
125 | return 0; | |
126 | } | |
127 |