1 /* 2 * Copyright (c) 2021 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16 #ifndef PANDA_LIBPANDABASE_OS_UNIX_PIPE_H_ 17 #define PANDA_LIBPANDABASE_OS_UNIX_PIPE_H_ 18 19 #include "unique_fd.h" 20 #include "utils/expected.h" 21 #include "os/error.h" 22 23 #include <utility> 24 #include <optional> 25 26 namespace panda::os::unix { 27 28 std::pair<UniqueFd, UniqueFd> CreatePipe(); 29 30 int SetFdNonblocking(const UniqueFd &fd); 31 32 Expected<size_t, Error> ReadFromPipe(const UniqueFd &pipe_fd, void *buf, size_t size); 33 34 Expected<size_t, Error> WriteToPipe(const UniqueFd &pipe_fd, const void *buf, size_t size); 35 36 enum class EventType { READY }; 37 38 Expected<size_t, Error> WaitForEvent(const UniqueFd *handles, size_t size, EventType type); 39 40 std::optional<Error> Dup2(const UniqueFd &source, const UniqueFd &target); 41 42 } // namespace panda::os::unix 43 44 #endif // PANDA_LIBPANDABASE_OS_UNIX_PIPE_H_ 45