1 /* Create threads from multiple threads in parallel.
2 Copyright 2007-2015 Free Software Foundation, Inc.
4 This file is part of GDB.
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.
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.
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/>. */
27 thread_function (void *arg
)
29 int x
= * (int *) arg
;
31 printf ("Thread <%d> executing\n", x
);
37 create_function (void *arg
)
40 pthread_t threads
[NUM_THREAD
];
42 int i
= * (int *) arg
;
45 pthread_attr_init (&attr
); /* set breakpoint 1 here. */
46 pthread_attr_setstacksize (&attr
, 2*PTHREAD_STACK_MIN
);
48 /* Create a ton of quick-executing threads, then wait for them to
50 for (j
= 0; j
< NUM_THREAD
; ++j
)
52 args
[j
] = i
* 1000 + j
;
53 pthread_create (&threads
[j
], &attr
, thread_function
, &args
[j
]);
56 for (j
= 0; j
< NUM_THREAD
; ++j
)
57 pthread_join (threads
[j
], NULL
);
59 pthread_attr_destroy (&attr
);
65 main (int argc
, char **argv
)
68 pthread_t threads
[NUM_CREATE
];
72 pthread_attr_init (&attr
);
73 pthread_attr_setstacksize (&attr
, 2*PTHREAD_STACK_MIN
);
75 for (n
= 0; n
< 100; ++n
)
77 for (i
= 0; i
< NUM_CREATE
; i
++)
80 pthread_create (&threads
[i
], &attr
, create_function
, &args
[i
]);
84 for (i
= 0; i
< NUM_CREATE
; i
++)
85 pthread_join (threads
[i
], NULL
);
88 pthread_attr_destroy (&attr
);
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