| /* |
| * Copyright (C) 2015 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 "fdevent.h" |
| |
| #include <gtest/gtest.h> |
| |
| #include <pthread.h> |
| #include <signal.h> |
| |
| #include <limits> |
| #include <queue> |
| #include <string> |
| #include <vector> |
| |
| #include "adb_io.h" |
| |
| class FdHandler { |
| public: |
| FdHandler(int read_fd, int write_fd) : read_fd_(read_fd), write_fd_(write_fd) { |
| fdevent_install(&read_fde_, read_fd_, FdEventCallback, this); |
| fdevent_add(&read_fde_, FDE_READ); |
| fdevent_install(&write_fde_, write_fd_, FdEventCallback, this); |
| } |
| |
| ~FdHandler() { |
| fdevent_remove(&read_fde_); |
| fdevent_remove(&write_fde_); |
| } |
| |
| private: |
| static void FdEventCallback(int fd, unsigned events, void* userdata) { |
| FdHandler* handler = reinterpret_cast<FdHandler*>(userdata); |
| ASSERT_EQ(0u, (events & ~(FDE_READ | FDE_WRITE))) << "unexpected events: " << events; |
| if (events & FDE_READ) { |
| ASSERT_EQ(fd, handler->read_fd_); |
| char c; |
| ASSERT_EQ(1, read(fd, &c, 1)); |
| handler->queue_.push(c); |
| fdevent_add(&handler->write_fde_, FDE_WRITE); |
| } |
| if (events & FDE_WRITE) { |
| ASSERT_EQ(fd, handler->write_fd_); |
| ASSERT_FALSE(handler->queue_.empty()); |
| char c = handler->queue_.front(); |
| handler->queue_.pop(); |
| ASSERT_EQ(1, write(fd, &c, 1)); |
| if (handler->queue_.empty()) { |
| fdevent_del(&handler->write_fde_, FDE_WRITE); |
| } |
| } |
| } |
| |
| private: |
| const int read_fd_; |
| const int write_fd_; |
| fdevent read_fde_; |
| fdevent write_fde_; |
| std::queue<char> queue_; |
| }; |
| |
| static void signal_handler(int) { |
| pthread_exit(nullptr); |
| } |
| |
| class FdeventTest : public ::testing::Test { |
| protected: |
| static void SetUpTestCase() { |
| ASSERT_NE(SIG_ERR, signal(SIGUSR1, signal_handler)); |
| ASSERT_NE(SIG_ERR, signal(SIGPIPE, SIG_IGN)); |
| } |
| |
| virtual void SetUp() { |
| fdevent_reset(); |
| ASSERT_EQ(0u, fdevent_installed_count()); |
| } |
| }; |
| |
| struct ThreadArg { |
| int first_read_fd; |
| int last_write_fd; |
| size_t middle_pipe_count; |
| }; |
| |
| static void FdEventThreadFunc(ThreadArg* arg) { |
| std::vector<int> read_fds; |
| std::vector<int> write_fds; |
| |
| read_fds.push_back(arg->first_read_fd); |
| for (size_t i = 0; i < arg->middle_pipe_count; ++i) { |
| int fds[2]; |
| ASSERT_EQ(0, pipe(fds)); |
| read_fds.push_back(fds[0]); |
| write_fds.push_back(fds[1]); |
| } |
| write_fds.push_back(arg->last_write_fd); |
| |
| std::vector<std::unique_ptr<FdHandler>> fd_handlers; |
| for (size_t i = 0; i < read_fds.size(); ++i) { |
| fd_handlers.push_back(std::unique_ptr<FdHandler>(new FdHandler(read_fds[i], write_fds[i]))); |
| } |
| |
| fdevent_loop(); |
| } |
| |
| TEST_F(FdeventTest, smoke) { |
| const size_t PIPE_COUNT = 10; |
| const size_t MESSAGE_LOOP_COUNT = 100; |
| const std::string MESSAGE = "fdevent_test"; |
| int fd_pair1[2]; |
| int fd_pair2[2]; |
| ASSERT_EQ(0, pipe(fd_pair1)); |
| ASSERT_EQ(0, pipe(fd_pair2)); |
| pthread_t thread; |
| ThreadArg thread_arg; |
| thread_arg.first_read_fd = fd_pair1[0]; |
| thread_arg.last_write_fd = fd_pair2[1]; |
| thread_arg.middle_pipe_count = PIPE_COUNT; |
| int writer = fd_pair1[1]; |
| int reader = fd_pair2[0]; |
| |
| ASSERT_EQ(0, pthread_create(&thread, nullptr, |
| reinterpret_cast<void* (*)(void*)>(FdEventThreadFunc), |
| &thread_arg)); |
| |
| for (size_t i = 0; i < MESSAGE_LOOP_COUNT; ++i) { |
| std::string read_buffer = MESSAGE; |
| std::string write_buffer(MESSAGE.size(), 'a'); |
| ASSERT_TRUE(WriteFdExactly(writer, read_buffer.c_str(), read_buffer.size())); |
| ASSERT_TRUE(ReadFdExactly(reader, &write_buffer[0], write_buffer.size())); |
| ASSERT_EQ(read_buffer, write_buffer); |
| } |
| |
| ASSERT_EQ(0, pthread_kill(thread, SIGUSR1)); |
| ASSERT_EQ(0, pthread_join(thread, nullptr)); |
| ASSERT_EQ(0, close(writer)); |
| ASSERT_EQ(0, close(reader)); |
| } |
| |
| struct InvalidFdArg { |
| fdevent fde; |
| unsigned expected_events; |
| size_t* happened_event_count; |
| }; |
| |
| static void InvalidFdEventCallback(int fd, unsigned events, void* userdata) { |
| InvalidFdArg* arg = reinterpret_cast<InvalidFdArg*>(userdata); |
| ASSERT_EQ(arg->expected_events, events); |
| fdevent_remove(&arg->fde); |
| if (++*(arg->happened_event_count) == 2) { |
| pthread_exit(nullptr); |
| } |
| } |
| |
| static void InvalidFdThreadFunc(void*) { |
| const int INVALID_READ_FD = std::numeric_limits<int>::max() - 1; |
| size_t happened_event_count = 0; |
| InvalidFdArg read_arg; |
| read_arg.expected_events = FDE_READ | FDE_ERROR; |
| read_arg.happened_event_count = &happened_event_count; |
| fdevent_install(&read_arg.fde, INVALID_READ_FD, InvalidFdEventCallback, &read_arg); |
| fdevent_add(&read_arg.fde, FDE_READ); |
| |
| const int INVALID_WRITE_FD = std::numeric_limits<int>::max(); |
| InvalidFdArg write_arg; |
| write_arg.expected_events = FDE_READ | FDE_ERROR; |
| write_arg.happened_event_count = &happened_event_count; |
| fdevent_install(&write_arg.fde, INVALID_WRITE_FD, InvalidFdEventCallback, &write_arg); |
| fdevent_add(&write_arg.fde, FDE_WRITE); |
| fdevent_loop(); |
| } |
| |
| TEST_F(FdeventTest, invalid_fd) { |
| pthread_t thread; |
| ASSERT_EQ(0, pthread_create(&thread, nullptr, |
| reinterpret_cast<void* (*)(void*)>(InvalidFdThreadFunc), |
| nullptr)); |
| ASSERT_EQ(0, pthread_join(thread, nullptr)); |
| } |