mirror of
https://github.com/servalproject/serval-dna.git
synced 2024-12-21 06:03:12 +00:00
142 lines
3.9 KiB
C
142 lines
3.9 KiB
C
/*
|
|
* Asterisk -- An open source telephony toolkit.
|
|
*
|
|
* Copyright (C) 1999 - 2005, Digium, Inc.
|
|
*
|
|
* Mark Spencer <markster@digium.com>
|
|
*
|
|
* See http://www.asterisk.org for more information about
|
|
* the Asterisk project. Please do not directly contact
|
|
* any of the maintainers of this project for assistance;
|
|
* the project provides a web site, mailing lists and IRC
|
|
* channels for your use.
|
|
*
|
|
* This program is free software, distributed under the terms of
|
|
* the GNU General Public License Version 2. See the LICENSE file
|
|
* at the top of the source tree.
|
|
*/
|
|
|
|
/*! \file
|
|
* \brief I/O Management (derived from Cheops-NG)
|
|
*/
|
|
|
|
#ifndef _ASTERISK_IO_H
|
|
#define _ASTERISK_IO_H
|
|
|
|
#include "asterisk/poll-compat.h"
|
|
|
|
#if defined(__cplusplus) || defined(c_plusplus)
|
|
extern "C" {
|
|
#endif
|
|
|
|
/*! Input ready */
|
|
#define AST_IO_IN POLLIN
|
|
/*! Output ready */
|
|
#define AST_IO_OUT POLLOUT
|
|
/*! Priority input ready */
|
|
#define AST_IO_PRI POLLPRI
|
|
|
|
/* Implicitly polled for */
|
|
/*! Error condition (errno or getsockopt) */
|
|
#define AST_IO_ERR POLLERR
|
|
/*! Hangup */
|
|
#define AST_IO_HUP POLLHUP
|
|
/*! Invalid fd */
|
|
#define AST_IO_NVAL POLLNVAL
|
|
|
|
/*
|
|
* An Asterisk IO callback takes its id, a file descriptor, list of events, and
|
|
* callback data as arguments and returns 0 if it should not be
|
|
* run again, or non-zero if it should be run again.
|
|
*/
|
|
|
|
struct io_context;
|
|
|
|
/*! Creates a context */
|
|
/*!
|
|
* Create a context for I/O operations
|
|
* Basically mallocs an IO structure and sets up some default values.
|
|
* Returns an allocated io_context structure
|
|
*/
|
|
struct io_context *io_context_create(void);
|
|
|
|
/*! Destroys a context */
|
|
/*
|
|
* \param ioc structure to destroy
|
|
* Destroy a context for I/O operations
|
|
* Frees all memory associated with the given io_context structure along with the structure itself
|
|
*/
|
|
void io_context_destroy(struct io_context *ioc);
|
|
|
|
typedef int (*ast_io_cb)(int *id, int fd, short events, void *cbdata);
|
|
#define AST_IO_CB(a) ((ast_io_cb)(a))
|
|
|
|
/*! Adds an IO context */
|
|
/*!
|
|
* \param ioc which context to use
|
|
* \param fd which fd to monitor
|
|
* \param callback callback function to run
|
|
* \param events event mask of events to wait for
|
|
* \param data data to pass to the callback
|
|
* Watch for any of revents activites on fd, calling callback with data as
|
|
* callback data. Returns a pointer to ID of the IO event, or NULL on failure.
|
|
*/
|
|
int *ast_io_add(struct io_context *ioc, int fd, ast_io_cb callback, short events, void *data);
|
|
|
|
/*! Changes an IO handler */
|
|
/*!
|
|
* \param ioc which context to use
|
|
* \param id
|
|
* \param fd the fd you wish it to contain now
|
|
* \param callback new callback function
|
|
* \param events event mask to wait for
|
|
* \param data data to pass to the callback function
|
|
* Change an i/o handler, updating fd if > -1, callback if non-null, and revents
|
|
* if >-1, and data if non-null. Returns a pointero to the ID of the IO event,
|
|
* or NULL on failure.
|
|
*/
|
|
int *ast_io_change(struct io_context *ioc, int *id, int fd, ast_io_cb callback, short events, void *data);
|
|
|
|
/*! Removes an IO context */
|
|
/*!
|
|
* \param ioc which io_context to remove it from
|
|
* \param id which ID to remove
|
|
* Remove an I/O id from consideration Returns 0 on success or -1 on failure.
|
|
*/
|
|
int ast_io_remove(struct io_context *ioc, int *id);
|
|
|
|
/*! Waits for IO */
|
|
/*!
|
|
* \param ioc which context to act upon
|
|
* \param howlong how many milliseconds to wait
|
|
* Wait for I/O to happen, returning after
|
|
* howlong milliseconds, and after processing
|
|
* any necessary I/O. Returns the number of
|
|
* I/O events which took place.
|
|
*/
|
|
int ast_io_wait(struct io_context *ioc, int howlong);
|
|
|
|
/*! Dumps the IO array */
|
|
/*
|
|
* Debugging: Dump everything in the I/O array
|
|
*/
|
|
void ast_io_dump(struct io_context *ioc);
|
|
|
|
/*! Set fd into non-echoing mode (if fd is a tty) */
|
|
|
|
int ast_hide_password(int fd);
|
|
|
|
/*! Restores TTY mode */
|
|
/*
|
|
* Call with result from previous ast_hide_password
|
|
*/
|
|
int ast_restore_tty(int fd, int oldstatus);
|
|
|
|
int ast_get_termcols(int fd);
|
|
|
|
#if defined(__cplusplus) || defined(c_plusplus)
|
|
}
|
|
#endif
|
|
|
|
#endif /* _ASTERISK_IO_H */
|