glibc/tests/Regression/bz434601-timedlock-segfault/timedlock.c

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#include <stdio.h>
#include <unistd.h>
#include <assert.h>
#include <pthread.h>
static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
static volatile int counter = 0;
static volatile int stop = 0;
static void *
testTimedLock(void *arg)
{
int rc = 0;
struct timespec abstime;
abstime.tv_sec = time(0) + 10;
abstime.tv_nsec = 100000000;
for ( ; stop == 0; ) {
rc = pthread_mutex_timedlock( &mutex, &abstime );
if (rc != 0) { perror("Errno:"); };
assert(rc == 0);
++counter;
rc = pthread_mutex_unlock( &mutex );
if (rc != 0) { perror("Errno:"); };
assert(rc == 0);
}
return 0;
}
void
createThreads(int nThreads, pthread_t *thr)
{
int nt;
for ( nt = 0 ; nt < nThreads ; ++nt ) {
int rc = pthread_create( thr+nt, NULL, testTimedLock, NULL);
if (rc != 0) { perror("Errno:"); };
assert( rc == 0 );
}
}
void
joinThreads(int nThreads, pthread_t *thr)
{
int nt;
for ( nt = 0 ; nt < nThreads ; ++nt ) {
int rc = pthread_join( thr[nt], NULL);
if (rc != 0) { perror("Errno:"); };
assert( rc == 0 );
}
}
int
main(void)
{
int nThreads = 10;
pthread_t thr[nThreads];
createThreads(nThreads, thr);
usleep (1000000); // 1 second
stop = 1;
joinThreads(nThreads, thr);
printf("counter = %d\n", counter);
return 0;
}