mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-15 04:31:49 +08:00
78 lines
2.1 KiB
C
78 lines
2.1 KiB
C
/* This testcase is part of GDB, the GNU debugger.
|
|
|
|
Copyright 2018-2020 Free Software Foundation, Inc.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>. */
|
|
|
|
#include <pthread.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <assert.h>
|
|
#define NUM_THREADS 4
|
|
|
|
/* Crude spin lock. Threads all spin until this is set to 0. */
|
|
int go = 1;
|
|
|
|
/* Thread function, just spin until GO is set to 0. */
|
|
void *
|
|
perform_work (void *argument)
|
|
{
|
|
/* Cast to volatile to ensure that ARGUMENT is loaded each time around
|
|
the loop. */
|
|
while (*((volatile int*) argument))
|
|
{
|
|
/* Nothing. */
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/* The spin loop for the main thread. */
|
|
void
|
|
function (void)
|
|
{
|
|
(void) perform_work (&go);
|
|
printf ("Finished from function\n");
|
|
}
|
|
|
|
/* Main program, create some threads which all spin waiting for GO to be
|
|
set to 0. */
|
|
int
|
|
main (void)
|
|
{
|
|
pthread_t threads[NUM_THREADS];
|
|
int result_code;
|
|
unsigned index;
|
|
|
|
/* Create some threads. */
|
|
for (index = 0; index < NUM_THREADS; ++index)
|
|
{
|
|
printf ("In main: creating thread %d\n", index);
|
|
result_code = pthread_create (&threads[index], NULL, perform_work, &go);
|
|
assert (!result_code);
|
|
}
|
|
|
|
function ();
|
|
|
|
/* Wait for each thread to complete. */
|
|
for (index = 0; index < NUM_THREADS; ++index)
|
|
{
|
|
/* Block until thread INDEX completes. */
|
|
result_code = pthread_join (threads[index], NULL);
|
|
assert (!result_code);
|
|
printf ("In main: thread %d has completed\n", index);
|
|
}
|
|
printf ("In main: All threads completed successfully\n");
|
|
return 0;
|
|
}
|