1 /* 2 * Copyright 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 //#define LOG_NDEBUG 0 18 #define LOG_TAG "cam_semaphore_tests" 19 #include <utils/Log.h> 20 21 #include <gtest/gtest.h> 22 23 #include "cam_semaphore.h" 24 25 #define NS_PER_S 1000000000 26 27 //10 ms is about standard timer resolution for most non-RTOS. 28 #define TIME_THRESHOLD_IN_NS 10000000 29 30 static inline void timespec_add_ms(timespec& ts, size_t ms) { 31 ts.tv_sec += ms / 1000; 32 ts.tv_nsec += (ms % 1000) * 1000000; 33 if (ts.tv_nsec >= NS_PER_S) { 34 ts.tv_sec++; 35 ts.tv_nsec -= NS_PER_S; 36 } 37 } 38 39 static inline int64_t time_diff(timespec& ts_start, timespec& ts_end) { 40 if (ts_start.tv_sec == ts_end.tv_sec) { 41 return (int64_t)ts_end.tv_nsec - ts_start.tv_nsec; 42 } else { 43 return (int64_t)(ts_end.tv_sec - 1 - ts_start.tv_sec) * NS_PER_S + 44 ts_end.tv_nsec + NS_PER_S - ts_start.tv_nsec; 45 } 46 } 47 48 // Test cam_semaphore_timedwait 49 TEST(cam_semaphore_tests, cam_semaphore_timedwait) { 50 51 cam_semaphore_t sem; 52 cam_sem_init(&sem, 0); 53 54 // Test timeout 55 timespec ts; 56 ASSERT_EQ(0, clock_gettime(CLOCK_MONOTONIC, &ts)); 57 timespec_add_ms(ts, 100); 58 59 errno = 0; 60 ASSERT_EQ(-1, cam_sem_timedwait(&sem, &ts)); 61 timespec ts_end; 62 clock_gettime(CLOCK_MONOTONIC, &ts_end); 63 64 ASSERT_EQ(ETIMEDOUT, errno); 65 // Check time after timeout ~= time before call + timeout 66 ASSERT_GE(time_diff(ts, ts_end), 0); 67 ASSERT_LT(time_diff(ts, ts_end), TIME_THRESHOLD_IN_NS); 68 69 // Test successful wait 70 ASSERT_EQ(0, clock_gettime(CLOCK_MONOTONIC, &ts)); 71 timespec_add_ms(ts, 100); 72 73 errno = 0; 74 cam_sem_post(&sem); 75 ASSERT_EQ(0, cam_sem_timedwait(&sem, &ts)); 76 ASSERT_EQ(0, errno); 77 } 78
