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Diffstat (limited to 'libappfuse/EpollController.cc')
-rw-r--r-- | libappfuse/EpollController.cc | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/libappfuse/EpollController.cc b/libappfuse/EpollController.cc new file mode 100644 index 000000000..9daeab8f4 --- /dev/null +++ b/libappfuse/EpollController.cc @@ -0,0 +1,66 @@ +/* + * Copyright (C) 2017 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 specic language governing permissions and + * limitations under the License. + */ + +#include <android-base/logging.h> + +#include "libappfuse/EpollController.h" + +namespace android { +namespace fuse { + +EpollController::EpollController(base::unique_fd&& poll_fd) : poll_fd_(std::move(poll_fd)) { +} + +bool EpollController::Wait(size_t event_count) { + events_.resize(event_count); + const int result = TEMP_FAILURE_RETRY(epoll_wait(poll_fd_, events_.data(), event_count, -1)); + if (result == -1) { + PLOG(ERROR) << "Failed to wait for epoll"; + return false; + } + events_.resize(result); + return true; +} + +bool EpollController::AddFd(int fd, int events, void* data) { + return InvokeControl(EPOLL_CTL_ADD, fd, events, data); +} + +bool EpollController::UpdateFd(int fd, int events, void* data) { + return InvokeControl(EPOLL_CTL_MOD, fd, events, data); +} + +bool EpollController::RemoveFd(int fd) { + return InvokeControl(EPOLL_CTL_DEL, fd, /* events */ 0, nullptr); +} + +const std::vector<epoll_event>& EpollController::events() const { + return events_; +} + +bool EpollController::InvokeControl(int op, int fd, int events, void* data) const { + epoll_event event; + memset(&event, 0, sizeof(event)); + event.events = events; + event.data.ptr = data; + if (epoll_ctl(poll_fd_, op, fd, &event) == -1) { + PLOG(ERROR) << "epoll_ctl() error op=" << op; + return false; + } + return true; +} +} +} |