2a14b71f14
The class is a thin wrapper for C epoll functions.
Bug: 34903085
Test: Build EpollController.cc and libappfuse_test after applying
future changes locally.
Change-Id: Iedce7f35e4397f80cde1054d53261ad94f9e58a8
66 lines
1.9 KiB
C++
66 lines
1.9 KiB
C++
/*
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* Copyright (C) 2017 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 specic language governing permissions and
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* limitations under the License.
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*/
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#include <android-base/logging.h>
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#include "libappfuse/EpollController.h"
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namespace android {
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namespace fuse {
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EpollController::EpollController(base::unique_fd&& poll_fd) : poll_fd_(std::move(poll_fd)) {
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}
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bool EpollController::Wait(size_t event_count) {
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events_.resize(event_count);
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const int result = TEMP_FAILURE_RETRY(epoll_wait(poll_fd_, events_.data(), event_count, -1));
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if (result == -1) {
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PLOG(ERROR) << "Failed to wait for epoll";
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return false;
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}
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events_.resize(result);
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return true;
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}
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bool EpollController::AddFd(int fd, int events, void* data) {
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return InvokeControl(EPOLL_CTL_ADD, fd, events, data);
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}
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bool EpollController::UpdateFd(int fd, int events, void* data) {
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return InvokeControl(EPOLL_CTL_MOD, fd, events, data);
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}
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bool EpollController::RemoveFd(int fd) {
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return InvokeControl(EPOLL_CTL_DEL, fd, /* events */ 0, nullptr);
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}
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const std::vector<epoll_event>& EpollController::events() const {
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return events_;
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}
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bool EpollController::InvokeControl(int op, int fd, int events, void* data) const {
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epoll_event event;
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memset(&event, 0, sizeof(event));
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event.events = events;
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event.data.ptr = data;
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if (epoll_ctl(poll_fd_, op, fd, &event) == -1) {
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PLOG(ERROR) << "epoll_ctl() error op=" << op;
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return false;
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}
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return true;
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}
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}
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}
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