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| | /* testing pthread mutex behaviour with various attributes */
#include <pthread.h>
#include <semaphore.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include "test.h"
#define T(f) if ((r=(f))) t_error(#f " failed: %s\n", strerror(r))
#define E(f) if (f) t_error(#f " failed: %s\n", strerror(errno))
static void *relock(void *arg)
{
void **a = arg;
int r;
T(pthread_mutex_lock(a[0]));
E(sem_post(a[1]));
*(int*)a[2] = pthread_mutex_lock(a[0]);
E(sem_post(a[1]));
T(pthread_mutex_unlock(a[0]));
if (*(int*)a[2] == 0)
T(pthread_mutex_unlock(a[0]));
return 0;
}
static int test_relock(int mtype)
{
struct timespec ts;
pthread_t t;
pthread_mutex_t m;
pthread_mutexattr_t ma;
sem_t s;
int i;
int r;
void *p;
void *a[] = {&m,&s,&i};
T(pthread_mutexattr_init(&ma));
T(pthread_mutexattr_settype(&ma, mtype));
T(pthread_mutexattr_setprotocol(&ma, PTHREAD_PRIO_INHERIT));
T(pthread_mutex_init(a[0], &ma));
T(pthread_mutexattr_destroy(&ma));
E(sem_init(a[1], 0, 0));
T(pthread_create(&t, 0, relock, a));
E(sem_wait(a[1]));
E(clock_gettime(CLOCK_REALTIME, &ts));
ts.tv_nsec += 100*1000*1000;
if (ts.tv_nsec >= 1000*1000*1000) {
ts.tv_nsec -= 1000*1000*1000;
ts.tv_sec += 1;
}
r = sem_timedwait(a[1],&ts);
if (r == -1) {
if (errno != ETIMEDOUT)
t_error("sem_timedwait failed with unexpected error: %s\n", strerror(errno));
/* leave the deadlocked relock thread running */
return -1;
}
T(pthread_join(t, &p));
T(pthread_mutex_destroy(a[0]));
E(sem_destroy(a[1]));
return i;
}
static void *unlock(void *arg)
{
void **a = arg;
*(int*)a[1] = pthread_mutex_unlock(a[0]);
return 0;
}
static int test_unlock(int mtype)
{
pthread_t t;
pthread_mutex_t m;
pthread_mutexattr_t ma;
int i;
int r;
void *p;
void *a[] = {&m,&i};
T(pthread_mutexattr_init(&ma));
T(pthread_mutexattr_settype(&ma, mtype));
T(pthread_mutexattr_setprotocol(&ma, PTHREAD_PRIO_INHERIT));
T(pthread_mutex_init(a[0], &ma));
T(pthread_mutexattr_destroy(&ma));
T(pthread_create(&t, 0, unlock, a));
T(pthread_join(t, &p));
T(pthread_mutex_destroy(a[0]));
return i;
}
static int test_unlock_other(int mtype)
{
pthread_t t;
pthread_mutex_t m;
pthread_mutexattr_t ma;
int i;
int r;
void *p;
void *a[] = {&m,&i};
T(pthread_mutexattr_init(&ma));
T(pthread_mutexattr_settype(&ma, mtype));
T(pthread_mutexattr_setprotocol(&ma, PTHREAD_PRIO_INHERIT));
T(pthread_mutex_init(a[0], &ma));
T(pthread_mutexattr_destroy(&ma));
T(pthread_mutex_lock(a[0]));
T(pthread_create(&t, 0, unlock, a));
T(pthread_join(t, &p));
T(pthread_mutex_unlock(a[0]));
T(pthread_mutex_destroy(a[0]));
return i;
}
static void test_mutexattr()
{
pthread_mutex_t m;
pthread_mutexattr_t a;
int r;
int i;
T(pthread_mutexattr_init(&a));
T(pthread_mutexattr_gettype(&a, &i));
if (i != PTHREAD_MUTEX_DEFAULT)
t_error("default mutex type is %d, wanted PTHREAD_MUTEX_DEFAULT (%d)\n", i, PTHREAD_MUTEX_DEFAULT);
T(pthread_mutexattr_settype(&a, PTHREAD_MUTEX_ERRORCHECK));
T(pthread_mutexattr_gettype(&a, &i));
if (i != PTHREAD_MUTEX_ERRORCHECK)
t_error("setting error check mutex type failed failed: got %d, wanted %d\n", i, PTHREAD_MUTEX_ERRORCHECK);
T(pthread_mutexattr_destroy(&a));
}
int main(void)
{
int i;
test_mutexattr();
i = test_relock(PTHREAD_MUTEX_NORMAL);
if (i != -1)
t_error("PTHREAD_MUTEX_NORMAL relock did not deadlock, got %s\n", strerror(i));
i = test_relock(PTHREAD_MUTEX_ERRORCHECK);
if (i != EDEADLK)
t_error("PTHREAD_MUTEX_ERRORCHECK relock did not return EDEADLK, got %s\n", i==-1?"deadlock":strerror(i));
i = test_relock(PTHREAD_MUTEX_RECURSIVE);
if (i != 0)
t_error("PTHREAD_MUTEX_RECURSIVE relock did not succed, got %s\n", i==-1?"deadlock":strerror(i));
i = test_unlock(PTHREAD_MUTEX_ERRORCHECK);
if (i != EPERM)
t_error("PTHREAD_MUTEX_ERRORCHECK unlock did not return EPERM, got %s\n", strerror(i));
i = test_unlock(PTHREAD_MUTEX_RECURSIVE);
if (i != EPERM)
t_error("PTHREAD_MUTEX_RECURSIVE unlock did not return EPERM, got %s\n", strerror(i));
i = test_unlock_other(PTHREAD_MUTEX_ERRORCHECK);
if (i != EPERM)
t_error("PTHREAD_MUTEX_ERRORCHECK unlock did not return EPERM, got %s\n", strerror(i));
i = test_unlock_other(PTHREAD_MUTEX_RECURSIVE);
if (i != EPERM)
t_error("PTHREAD_MUTEX_RECURSIVE unlock did not return EPERM, got %s\n", strerror(i));
return t_status;
}
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