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/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2.
*
* 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.
*
* Test that the underlying kernel-scheduled entities for the process
* contention scope threads have their scheduling parameters changed to the
* value specified in param.
*/
#include <sched.h>
#include <stdio.h>
#include <pthread.h>
#include <unistd.h>
#include <errno.h>
#include "posixtest.h"
void *runner(void *arg)
{
while (1)
sleep(1);
return NULL;
}
int main(void)
{
int new_priority, max_priority, policy, result;
struct sched_param param;
pthread_t tid;
pthread_attr_t attr;
if (sched_getparam(getpid(), ¶m) != 0) {
perror("An error occurs when calling sched_getparam()");
pthread_exit((void *)-1);
}
/* Make sure new_priority != old priority */
policy = sched_getscheduler(getpid());
max_priority = sched_get_priority_max(policy);
new_priority = (param.sched_priority == max_priority) ?
sched_get_priority_min(policy) : max_priority;
if (pthread_attr_init(&attr) != 0) {
printf("An error occurs when calling pthread_attr_init()");
return PTS_UNRESOLVED;
}
result = pthread_attr_setscope(&attr, PTHREAD_SCOPE_PROCESS);
if (result == ENOTSUP) {
printf("Process contention scope threads are not supported.\n");
return PTS_UNSUPPORTED;
} else if (result != 0) {
printf("An error occurs when calling pthread_attr_setscope()");
return PTS_UNRESOLVED;
}
if (pthread_create(&tid, &attr, runner, NULL) != 0) {
printf("An error occurs when calling pthread_create()");
return PTS_UNRESOLVED;
}
param.sched_priority = new_priority;
if (sched_setparam(getpid(), ¶m) != 0) {
perror("An error occurs when calling sched_setparam()");
return PTS_UNRESOLVED;
}
if (pthread_getschedparam(tid, &policy, ¶m) != 0) {
printf("An error occurs when calling pthread_getschedparam()");
return PTS_UNRESOLVED;
}
pthread_cancel(tid);
if (param.sched_priority == new_priority) {
printf("Test PASSED\n");
return PTS_PASS;
}
printf("sched_setparam() does not set the right param.\n");
return PTS_FAIL;
}
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