/* * 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 /* 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; int force_eof; unsigned short state; unsigned short events; fd_func func; void *arg; }; #endif