Commit | Line | Data |
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62a24a2b | 1 | /* Create threads from multiple threads in parallel. |
32d0add0 | 2 | Copyright 2007-2015 Free Software Foundation, Inc. |
62a24a2b DJ |
3 | |
4 | This file is part of GDB. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 3 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
18 | ||
19 | #include <pthread.h> | |
20 | #include <stdio.h> | |
21 | #include <limits.h> | |
22 | ||
23 | #define NUM_CREATE 1 | |
24 | #define NUM_THREAD 8 | |
25 | ||
26 | void * | |
27 | thread_function (void *arg) | |
28 | { | |
29 | int x = * (int *) arg; | |
30 | ||
31 | printf ("Thread <%d> executing\n", x); | |
32 | ||
33 | return NULL; | |
34 | } | |
35 | ||
36 | void * | |
37 | create_function (void *arg) | |
38 | { | |
39 | pthread_attr_t attr; | |
40 | pthread_t threads[NUM_THREAD]; | |
41 | int args[NUM_THREAD]; | |
42 | int i = * (int *) arg; | |
43 | int j; | |
44 | ||
45 | pthread_attr_init (&attr); /* set breakpoint 1 here. */ | |
0057022f | 46 | pthread_attr_setstacksize (&attr, 2*PTHREAD_STACK_MIN); |
62a24a2b DJ |
47 | |
48 | /* Create a ton of quick-executing threads, then wait for them to | |
49 | complete. */ | |
50 | for (j = 0; j < NUM_THREAD; ++j) | |
51 | { | |
52 | args[j] = i * 1000 + j; | |
53 | pthread_create (&threads[j], &attr, thread_function, &args[j]); | |
54 | } | |
55 | ||
56 | for (j = 0; j < NUM_THREAD; ++j) | |
57 | pthread_join (threads[j], NULL); | |
58 | ||
59 | pthread_attr_destroy (&attr); | |
60 | ||
61 | return NULL; | |
62 | } | |
63 | ||
64 | int | |
65 | main (int argc, char **argv) | |
66 | { | |
67 | pthread_attr_t attr; | |
68 | pthread_t threads[NUM_CREATE]; | |
69 | int args[NUM_CREATE]; | |
70 | int n, i; | |
71 | ||
72 | pthread_attr_init (&attr); | |
0057022f | 73 | pthread_attr_setstacksize (&attr, 2*PTHREAD_STACK_MIN); |
62a24a2b DJ |
74 | |
75 | for (n = 0; n < 100; ++n) | |
76 | { | |
77 | for (i = 0; i < NUM_CREATE; i++) | |
78 | { | |
79 | args[i] = i; | |
80 | pthread_create (&threads[i], &attr, create_function, &args[i]); | |
81 | } | |
82 | ||
83 | create_function (&i); | |
84 | for (i = 0; i < NUM_CREATE; i++) | |
85 | pthread_join (threads[i], NULL); | |
86 | } | |
87 | ||
88 | pthread_attr_destroy (&attr); | |
89 | ||
90 | return 0; | |
91 | } |