void testSysSemaphoreErrors()
{
sys_semaphore_t sem; // Working semaphore
sys_semaphore_t sem_f; // Broken semaphore
sys_semaphore_attribute_t attr; // Initialized semaphore attribute
sys_semaphore_attribute_t attr_z; // Zeroed semaphore attribute
sys_semaphore_attribute_initialize(attr);
memset(&attr_z, 0x00, sizeof(sys_semaphore_attribute_t));
sys_semaphore_value_t val;
// Create the working semaphore
if (sys_semaphore_create(&sem, &attr, 0, 1)) {
printf("[!] sys_semaphore_create: Something went wrong!\n");
exit(-1);
}
// Error tests
printf("[*] Checking sys_semaphore_create errors:\n");
printf("sys_semaphore_create: max_val < 0 returns: 0x%x\n", sys_semaphore_create(&sem_f, &attr, 0, -1));
printf("sys_semaphore_create: max_val == 0 returns: 0x%x\n", sys_semaphore_create(&sem_f, &attr, 0, 0));
printf("sys_semaphore_create: initial_val < 0 returns: 0x%x\n", sys_semaphore_create(&sem_f, &attr, -1, 0));
printf("sys_semaphore_create: initial_val > max_val returns: 0x%x\n", sys_semaphore_create(&sem_f, &attr, 2, 1));
printf("sys_semaphore_create: &sem == NULL returns: 0x%x\n", sys_semaphore_create(NULL, &attr, 0, 1));
printf("sys_semaphore_create: &attr == NULL returns: 0x%x\n", sys_semaphore_create(&sem_f, NULL, 0, 1));
printf("sys_semaphore_create: uninitialized attr returns: 0x%x\n", sys_semaphore_create(&sem_f, &attr_z, 0, 1));
// Error tests
printf("\n[*] Checking sys_semaphore_get_value errors:\n");
printf("sys_semaphore_get_value: &val == NULL returns: 0x%x\n", sys_semaphore_get_value(sem, NULL));
printf("sys_semaphore_get_value: failed semaphore id returns: 0x%x\n", sys_semaphore_get_value(sem_f, &val));
printf("sys_semaphore_get_value: invalid semaphore id returns: 0x%x\n", sys_semaphore_get_value(NULL, &val));
printf("\n[*] Checking sys_semaphore_wait errors:\n");
printf("sys_semaphore_wait: short timeout returns: 0x%x\n", sys_semaphore_wait(sem, 1ULL));
printf("sys_semaphore_wait: failed semaphore id returns: 0x%x\n", sys_semaphore_wait(sem_f, 0ULL));
printf("sys_semaphore_wait: invalid semaphore id returns: 0x%x\n", sys_semaphore_wait(NULL, 0ULL));
printf("\n[*] Checking sys_semaphore_trywait errors:\n");
printf("sys_semaphore_trywait: semaphore value <= 0 returns: 0x%x\n", sys_semaphore_trywait(sem));
printf("sys_semaphore_trywait: failed semaphore id returns: 0x%x\n", sys_semaphore_trywait(sem_f));
printf("sys_semaphore_trywait: invalid semaphore id returns: 0x%x\n", sys_semaphore_trywait(NULL));
printf("\n[*] Checking sys_semaphore_post errors:\n");
printf("sys_semaphore_post: failed semaphore id returns: 0x%x\n", sys_semaphore_post(sem_f, 0));
printf("sys_semaphore_post: invalid semaphore id returns: 0x%x\n", sys_semaphore_post(NULL, 0));
printf("sys_semaphore_post: val < 0 returns: 0x%x\n", sys_semaphore_post(sem, -1));
printf("sys_semaphore_post: val > max_val returns: 0x%x\n", sys_semaphore_post(sem, 2));
// Destroy the working semaphore
if (sys_semaphore_destroy(sem)) {
printf("[!] sys_semaphore_destroy: Something went wrong!\n");
exit(-1);
}
// More error tests
printf("\n[*] Checking sys_semaphore_destroy errors:\n");
printf("sys_semaphore_destroy: failed semaphore id returns: 0x%x\n", sys_semaphore_destroy(sem_f));
printf("sys_semaphore_destroy: invalid semaphore id returns: 0x%x\n", sys_semaphore_destroy(NULL));
printf("sys_semaphore_destroy: destroyed semaphore id returns: 0x%x\n", sys_semaphore_destroy(sem));
}
int main(void) {
// Check errors on purpose
testSysSemaphoreErrors();
// Create the global semaphore
sys_semaphore_attribute_t attr;
sys_semaphore_attribute_initialize(attr);
if (sys_semaphore_create(&g_sem, &attr, 2, 2)) {
printf("[!] sys_semaphore_create: Something went wrong!\n");
exit(-1);
}
// Decrement semaphore: 2 -> 1 -> 0
sys_semaphore_value_t val;
printf("\n[*] Testing sys_semaphore_get_value and sys_semaphore_(try)wait:\n");
sys_semaphore_get_value(g_sem, &val);
printf("sys_semaphore_get_value: 0x%x\n", val);
createThreadAndJoin(semWait, 0ULL);
sys_semaphore_get_value(g_sem, &val);
printf("sys_semaphore_get_value: 0x%x\n", val);
createThreadAndJoin(semTrywait);
sys_semaphore_get_value(g_sem, &val);
printf("sys_semaphore_get_value: 0x%x\n", val);
// Create 3 threads and wake 1 of them after 1 second
printf("\n[*] Testing sys_semaphore_post and sys_semaphore_wait:\n");
createThread(semWaitCheck, 0);
createThread(semWaitCheck, 0);
createThread(semWaitCheck, 900000000ULL); // 15 min timeout
createThreadAndJoin(semPost, 1);
sys_timer_sleep(2);
sys_semaphore_get_value(g_sem, &val);
printf("sys_semaphore_get_value: 0x%x\n", val);
// Wake the 2 remaining threads after 1 second
createThreadAndJoin(semPost, 2);
sys_timer_sleep(2);
sys_semaphore_get_value(g_sem, &val);
printf("sys_semaphore_get_value: 0x%x\n", val);
// Create 1 threads and post 30 to the semaphore after 1 second (it shouldn't wake up)
createThread(semWaitCheck, 0);
createThreadAndJoin(semPost, 30);
sys_timer_sleep(2);
sys_semaphore_get_value(g_sem, &val);
printf("sys_semaphore_get_value: 0x%x\n", val);
// TODO: Repeat the tests, but now modifying sys_semaphore_attribute_t members.
return 0;
}
CellSemaphore::CellSemaphore (uint32_t aValue)
{
sys_semaphore_attribute_t attr;
sys_semaphore_attribute_initialize(attr);
sys_semaphore_create(&Semaphore, &attr, aValue, aValue);
}