| /* |
| * 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 */ |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| /* 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; |
| }; |
| |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif |