40 lines
1.0 KiB
C
40 lines
1.0 KiB
C
#include <pthread.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <stdio.h>
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static void *dummy_thread (void *arg) { printf ("started\n"); return arg; }
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static int start (int policy, int priority)
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{
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pthread_attr_t attr;
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struct sched_param param;
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pthread_t thread_id;
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int r;
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pthread_attr_init(&attr);
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pthread_attr_setschedpolicy (&attr, policy);
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param.sched_priority = priority;
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pthread_attr_setschedparam (&attr, ¶m);
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pthread_attr_setinheritsched (&attr, PTHREAD_EXPLICIT_SCHED);
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r = pthread_create(&thread_id, &attr, dummy_thread, NULL);
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pthread_attr_destroy(&attr);
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if (r == 0) { pthread_join(thread_id, NULL); }
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else { errno = r; perror ("pthread_create"); }
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return r;
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}
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int main(int argc, char **argv)
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{
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if (argc > 1) {
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switch (atoi (argv[1])) {
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case 0: start (SCHED_OTHER, 0); break;
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case 1: start (SCHED_OTHER, 10); break;
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case 2: start (SCHED_FIFO, 0); break;
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case 3: start (SCHED_FIFO, 10); break;
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case 4: if (start (SCHED_FIFO, 10) != 0) start (SCHED_OTHER, 0); break;
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}
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}
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return 0;
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}
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