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* 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
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* 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> /* for int64_t */
#include <functional>
#include "adb_unique_fd.h"
/* events that may be observed */
#define FDE_READ 0x0001
#define FDE_WRITE 0x0002
#define FDE_ERROR 0x0004
typedef void (*fd_func)(int fd, unsigned events, void *userdata);
struct fdevent {
uint64_t id;
unique_fd fd;
int force_eof = 0;
uint16_t state = 0;
uint16_t events = 0;
fd_func func = nullptr;
void* arg = nullptr;
/* Allocate and initialize a new fdevent object
* Note: use FD_TIMER as 'fd' to create a fd-less object
* (used to implement timers).
fdevent *fdevent_create(int fd, fd_func 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);
void fdevent_set_timeout(fdevent *fde, int64_t timeout_ms);
/* 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();