90 lines
2.7 KiB
C++
90 lines
2.7 KiB
C++
/*
|
|
* Copyright (C) 2006 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.
|
|
*/
|
|
|
|
#ifndef __FDEVENT_H
|
|
#define __FDEVENT_H
|
|
|
|
#include <stddef.h>
|
|
#include <stdint.h>
|
|
|
|
#include <chrono>
|
|
#include <functional>
|
|
#include <optional>
|
|
#include <variant>
|
|
|
|
#include "adb_unique_fd.h"
|
|
|
|
// Events that may be observed
|
|
#define FDE_READ 0x0001
|
|
#define FDE_WRITE 0x0002
|
|
#define FDE_ERROR 0x0004
|
|
#define FDE_TIMEOUT 0x0008
|
|
|
|
typedef void (*fd_func)(int fd, unsigned events, void *userdata);
|
|
typedef void (*fd_func2)(struct fdevent* fde, unsigned events, void* userdata);
|
|
|
|
struct fdevent {
|
|
uint64_t id;
|
|
|
|
unique_fd fd;
|
|
int force_eof = 0;
|
|
|
|
uint16_t state = 0;
|
|
uint16_t events = 0;
|
|
std::optional<std::chrono::milliseconds> timeout;
|
|
std::chrono::steady_clock::time_point last_active;
|
|
|
|
std::variant<fd_func, fd_func2> func;
|
|
void* arg = nullptr;
|
|
};
|
|
|
|
// Allocate and initialize a new fdevent object
|
|
// TODO: Switch these to unique_fd.
|
|
fdevent *fdevent_create(int fd, fd_func func, void *arg);
|
|
fdevent* fdevent_create(int fd, fd_func2 func, void* arg);
|
|
|
|
// Deallocate an fdevent object that was created by fdevent_create.
|
|
void fdevent_destroy(fdevent *fde);
|
|
|
|
// fdevent_destroy, except releasing the file descriptor previously owned by the fdevent.
|
|
unique_fd fdevent_release(fdevent* fde);
|
|
|
|
// Change which events should cause notifications
|
|
void fdevent_set(fdevent *fde, unsigned events);
|
|
void fdevent_add(fdevent *fde, unsigned events);
|
|
void fdevent_del(fdevent *fde, unsigned events);
|
|
|
|
// Set a timeout on an fdevent.
|
|
// If no events are triggered by the timeout, an FDE_TIMEOUT will be generated.
|
|
// Note timeouts are not defused automatically; if a timeout is set on an fdevent, it will
|
|
// trigger repeatedly every |timeout| ms.
|
|
void fdevent_set_timeout(fdevent* fde, std::optional<std::chrono::milliseconds> timeout);
|
|
|
|
// Loop forever, handling events.
|
|
void fdevent_loop();
|
|
|
|
void check_main_thread();
|
|
|
|
// Queue an operation to run on the main thread.
|
|
void fdevent_run_on_main_thread(std::function<void()> fn);
|
|
|
|
// The following functions are used only for tests.
|
|
void fdevent_terminate_loop();
|
|
size_t fdevent_installed_count();
|
|
void fdevent_reset();
|
|
void set_main_thread();
|
|
|
|
#endif
|