04303f5a8a
Bug: https://code.google.com/p/android/issues/detail?id=76088 Change-Id: I4a0561b23e90312384d40a1c804ca64ee98f4066
144 lines
3.4 KiB
C++
144 lines
3.4 KiB
C++
/*
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* Copyright (C) 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <semaphore.h>
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#include <errno.h>
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#include <gtest/gtest.h>
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#include <limits.h>
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#include <pthread.h>
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#include <time.h>
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#include <unistd.h>
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#include "private/bionic_constants.h"
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TEST(semaphore, sem_init) {
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sem_t s;
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// Perfectly fine initial values.
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ASSERT_EQ(0, sem_init(&s, 0, 0));
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ASSERT_EQ(0, sem_init(&s, 0, 1));
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ASSERT_EQ(0, sem_init(&s, 0, 123));
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// Too small an initial value.
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errno = 0;
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ASSERT_EQ(-1, sem_init(&s, 0, -1));
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ASSERT_EQ(EINVAL, errno);
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ASSERT_EQ(SEM_VALUE_MAX, sysconf(_SC_SEM_VALUE_MAX));
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// The largest initial value.
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ASSERT_EQ(0, sem_init(&s, 0, SEM_VALUE_MAX));
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// Too large an initial value.
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errno = 0;
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ASSERT_EQ(-1, sem_init(&s, 0, SEM_VALUE_MAX + 1));
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ASSERT_EQ(EINVAL, errno);
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ASSERT_EQ(0, sem_destroy(&s));
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}
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TEST(semaphore, sem_trywait) {
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sem_t s;
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ASSERT_EQ(0, sem_init(&s, 0, 3));
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ASSERT_EQ(0, sem_trywait(&s));
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ASSERT_EQ(0, sem_trywait(&s));
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ASSERT_EQ(0, sem_trywait(&s));
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errno = 0;
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ASSERT_EQ(-1, sem_trywait(&s));
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ASSERT_EQ(EAGAIN, errno);
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ASSERT_EQ(0, sem_destroy(&s));
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}
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static void SemWaitThreadTestFn(sem_t& sem) {
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ASSERT_EQ(0, sem_wait(&sem));
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}
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static void* SemWaitThreadFn(void* arg) {
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SemWaitThreadTestFn(*reinterpret_cast<sem_t*>(arg));
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return nullptr;
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}
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TEST(semaphore, sem_wait__sem_post) {
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sem_t s;
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ASSERT_EQ(0, sem_init(&s, 0, 0));
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pthread_t t1, t2, t3;
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ASSERT_EQ(0, pthread_create(&t1, NULL, SemWaitThreadFn, &s));
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ASSERT_EQ(0, pthread_create(&t2, NULL, SemWaitThreadFn, &s));
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ASSERT_EQ(0, pthread_create(&t3, NULL, SemWaitThreadFn, &s));
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ASSERT_EQ(0, sem_post(&s));
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ASSERT_EQ(0, sem_post(&s));
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ASSERT_EQ(0, sem_post(&s));
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void* result;
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ASSERT_EQ(0, pthread_join(t1, &result));
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ASSERT_EQ(0, pthread_join(t2, &result));
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ASSERT_EQ(0, pthread_join(t3, &result));
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}
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static inline void timespec_add_ms(timespec& ts, size_t ms) {
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ts.tv_sec += ms / 1000;
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ts.tv_nsec += (ms % 1000) * 1000000;
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if (ts.tv_nsec >= NS_PER_S) {
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ts.tv_sec++;
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ts.tv_nsec -= NS_PER_S;
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}
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}
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TEST(semaphore, sem_timedwait) {
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sem_t s;
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ASSERT_EQ(0, sem_init(&s, 0, 0));
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timespec ts;
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ASSERT_EQ(0, clock_gettime(CLOCK_REALTIME, &ts));
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timespec_add_ms(ts, 100);
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errno = 0;
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ASSERT_EQ(-1, sem_timedwait(&s, &ts));
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ASSERT_EQ(ETIMEDOUT, errno);
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// A negative timeout is an error.
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errno = 0;
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ts.tv_nsec = -1;
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ASSERT_EQ(-1, sem_timedwait(&s, &ts));
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ASSERT_EQ(EINVAL, errno);
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ASSERT_EQ(0, sem_destroy(&s));
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}
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TEST(semaphore, sem_getvalue) {
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sem_t s;
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ASSERT_EQ(0, sem_init(&s, 0, 0));
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int i;
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ASSERT_EQ(0, sem_getvalue(&s, &i));
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ASSERT_EQ(0, i);
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ASSERT_EQ(0, sem_post(&s));
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ASSERT_EQ(0, sem_getvalue(&s, &i));
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ASSERT_EQ(1, i);
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ASSERT_EQ(0, sem_post(&s));
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ASSERT_EQ(0, sem_getvalue(&s, &i));
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ASSERT_EQ(2, i);
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ASSERT_EQ(0, sem_wait(&s));
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ASSERT_EQ(0, sem_getvalue(&s, &i));
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ASSERT_EQ(1, i);
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}
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