| /* |
| * Copyright (C) 2014 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include <semaphore.h> |
| |
| #include <errno.h> |
| #include <gtest/gtest.h> |
| #include <limits.h> |
| #include <pthread.h> |
| #include <time.h> |
| #include <unistd.h> |
| |
| #include "private/bionic_constants.h" |
| |
| TEST(semaphore, sem_init) { |
| sem_t s; |
| |
| // Perfectly fine initial values. |
| ASSERT_EQ(0, sem_init(&s, 0, 0)); |
| ASSERT_EQ(0, sem_init(&s, 0, 1)); |
| ASSERT_EQ(0, sem_init(&s, 0, 123)); |
| |
| // Too small an initial value. |
| errno = 0; |
| ASSERT_EQ(-1, sem_init(&s, 0, -1)); |
| ASSERT_EQ(EINVAL, errno); |
| |
| ASSERT_EQ(SEM_VALUE_MAX, sysconf(_SC_SEM_VALUE_MAX)); |
| |
| // The largest initial value. |
| ASSERT_EQ(0, sem_init(&s, 0, SEM_VALUE_MAX)); |
| |
| // Too large an initial value. |
| errno = 0; |
| ASSERT_EQ(-1, sem_init(&s, 0, SEM_VALUE_MAX + 1)); |
| ASSERT_EQ(EINVAL, errno); |
| |
| ASSERT_EQ(0, sem_destroy(&s)); |
| } |
| |
| TEST(semaphore, sem_trywait) { |
| sem_t s; |
| ASSERT_EQ(0, sem_init(&s, 0, 3)); |
| ASSERT_EQ(0, sem_trywait(&s)); |
| ASSERT_EQ(0, sem_trywait(&s)); |
| ASSERT_EQ(0, sem_trywait(&s)); |
| errno = 0; |
| ASSERT_EQ(-1, sem_trywait(&s)); |
| ASSERT_EQ(EAGAIN, errno); |
| ASSERT_EQ(0, sem_destroy(&s)); |
| } |
| |
| static void SemWaitThreadTestFn(sem_t& sem) { |
| ASSERT_EQ(0, sem_wait(&sem)); |
| } |
| |
| static void* SemWaitThreadFn(void* arg) { |
| SemWaitThreadTestFn(*reinterpret_cast<sem_t*>(arg)); |
| return nullptr; |
| } |
| |
| TEST(semaphore, sem_wait__sem_post) { |
| sem_t s; |
| ASSERT_EQ(0, sem_init(&s, 0, 0)); |
| |
| pthread_t t1, t2, t3; |
| ASSERT_EQ(0, pthread_create(&t1, NULL, SemWaitThreadFn, &s)); |
| ASSERT_EQ(0, pthread_create(&t2, NULL, SemWaitThreadFn, &s)); |
| ASSERT_EQ(0, pthread_create(&t3, NULL, SemWaitThreadFn, &s)); |
| |
| ASSERT_EQ(0, sem_post(&s)); |
| ASSERT_EQ(0, sem_post(&s)); |
| ASSERT_EQ(0, sem_post(&s)); |
| |
| void* result; |
| ASSERT_EQ(0, pthread_join(t1, &result)); |
| ASSERT_EQ(0, pthread_join(t2, &result)); |
| ASSERT_EQ(0, pthread_join(t3, &result)); |
| } |
| |
| static inline void timespec_add_ms(timespec& ts, size_t ms) { |
| ts.tv_sec += ms / 1000; |
| ts.tv_nsec += (ms % 1000) * 1000000; |
| if (ts.tv_nsec >= NS_PER_S) { |
| ts.tv_sec++; |
| ts.tv_nsec -= NS_PER_S; |
| } |
| } |
| |
| TEST(semaphore, sem_timedwait) { |
| sem_t s; |
| ASSERT_EQ(0, sem_init(&s, 0, 0)); |
| |
| timespec ts; |
| ASSERT_EQ(0, clock_gettime(CLOCK_REALTIME, &ts)); |
| timespec_add_ms(ts, 100); |
| |
| errno = 0; |
| ASSERT_EQ(-1, sem_timedwait(&s, &ts)); |
| ASSERT_EQ(ETIMEDOUT, errno); |
| |
| // A negative timeout is an error. |
| errno = 0; |
| ts.tv_nsec = -1; |
| ASSERT_EQ(-1, sem_timedwait(&s, &ts)); |
| ASSERT_EQ(EINVAL, errno); |
| |
| ASSERT_EQ(0, sem_destroy(&s)); |
| } |
| |
| TEST(semaphore, sem_getvalue) { |
| sem_t s; |
| ASSERT_EQ(0, sem_init(&s, 0, 0)); |
| |
| int i; |
| ASSERT_EQ(0, sem_getvalue(&s, &i)); |
| ASSERT_EQ(0, i); |
| |
| ASSERT_EQ(0, sem_post(&s)); |
| ASSERT_EQ(0, sem_getvalue(&s, &i)); |
| ASSERT_EQ(1, i); |
| |
| ASSERT_EQ(0, sem_post(&s)); |
| ASSERT_EQ(0, sem_getvalue(&s, &i)); |
| ASSERT_EQ(2, i); |
| |
| ASSERT_EQ(0, sem_wait(&s)); |
| ASSERT_EQ(0, sem_getvalue(&s, &i)); |
| ASSERT_EQ(1, i); |
| } |