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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
*
* 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 <stdint.h> /* for int64_t */
/* events that may be observed */
#define FDE_READ 0x0001
#define FDE_WRITE 0x0002
#define FDE_ERROR 0x0004
#define FDE_TIMEOUT 0x0008
/* features that may be set (via the events set/add/del interface) */
#define FDE_DONT_CLOSE 0x0080
typedef struct fdevent fdevent;
typedef void (*fd_func)(int fd, unsigned events, void *userdata);
/* 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);
/* Uninitialize and deallocate an fdevent object that was
** created by fdevent_create()
*/
void fdevent_destroy(fdevent *fde);
/* Initialize an fdevent object that was externally allocated
*/
void fdevent_install(fdevent *fde, int fd, fd_func func, void *arg);
/* Uninitialize an fdevent object that was initialized by
** fdevent_install()
*/
void fdevent_remove(fdevent *item);
/* 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();
struct fdevent
{
fdevent *next;
fdevent *prev;
int fd;
unsigned short state;
unsigned short events;
fd_func func;
void *arg;
};
#endif
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