146 lines
5.0 KiB
C
146 lines
5.0 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 1999 - 2005, Digium, Inc.
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*
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* Mark Spencer <markster@digium.com>
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*
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* See http://www.asterisk.org for more information about
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* the Asterisk project. Please do not directly contact
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* any of the maintainers of this project for assistance;
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* the project provides a web site, mailing lists and IRC
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* channels for your use.
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License Version 2. See the LICENSE file
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* at the top of the source tree.
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*/
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/*! \file
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* \brief Device state management
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*
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* To subscribe to device state changes, use the generic ast_event_subscribe
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* method. For an example, see apps/app_queue.c.
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*
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* \todo Currently, when the state of a device changes, the device state provider
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* calls one of the functions defined here to queue an object to say that the
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* state of a device has changed. However, this does not include the new state.
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* Another thread processes these device state change objects and calls the
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* device state provider's callback to figure out what the new state is. It
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* would make a lot more sense for the new state to be included in the original
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* function call that says the state of a device has changed. However, it
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* will take a lot of work to change this.
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*
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* \arg See \ref AstExtState
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*/
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#ifndef _ASTERISK_DEVICESTATE_H
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#define _ASTERISK_DEVICESTATE_H
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#if defined(__cplusplus) || defined(c_plusplus)
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extern "C" {
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#endif
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/*! Device States
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* \note The order of these states may not change because they are included
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* in Asterisk events which may be transmitted across the network to
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* other servers.
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*/
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enum ast_device_state {
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AST_DEVICE_UNKNOWN, /*!< Device is valid but channel didn't know state */
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AST_DEVICE_NOT_INUSE, /*!< Device is not used */
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AST_DEVICE_INUSE, /*!< Device is in use */
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AST_DEVICE_BUSY, /*!< Device is busy */
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AST_DEVICE_INVALID, /*!< Device is invalid */
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AST_DEVICE_UNAVAILABLE, /*!< Device is unavailable */
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AST_DEVICE_RINGING, /*!< Device is ringing */
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AST_DEVICE_RINGINUSE, /*!< Device is ringing *and* in use */
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AST_DEVICE_ONHOLD, /*!< Device is on hold */
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};
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/*! \brief Devicestate provider call back */
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typedef enum ast_device_state (*ast_devstate_prov_cb_type)(const char *data);
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/*! \brief Convert device state to text string for output
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* \param devstate Current device state
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*/
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const char *devstate2str(enum ast_device_state devstate);
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/*! \brief Convert device state to text string that is easier to parse
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* \param devstate Current device state
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*/
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const char *ast_devstate_str(enum ast_device_state devstate);
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/*! \brief Convert device state from text to integer value
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* \param val The text representing the device state. Valid values are anything
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* that comes after AST_DEVICE_ in one of the defined values.
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* \return The AST_DEVICE_ integer value
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*/
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enum ast_device_state ast_devstate_val(const char *val);
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/*!
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* \brief Search the Channels by Name
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* \param device like a dialstring
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* Search the Device in active channels by compare the channelname against
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* the devicename. Compared are only the first chars to the first '-' char.
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* \retval an AST_DEVICE_UNKNOWN if no channel found
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* \retval AST_DEVICE_INUSE if a channel is found
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*/
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enum ast_device_state ast_parse_device_state(const char *device);
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/*!
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* \brief Asks a channel for device state
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* \param device like a dialstring
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* Asks a channel for device state, data is normaly a number from dialstring
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* used by the low level module
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* Trys the channel devicestate callback if not supported search in the
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* active channels list for the device.
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* \retval an AST_DEVICE_??? state
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* \retval -1 on failure
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*/
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enum ast_device_state ast_device_state(const char *device);
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/*!
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* \brief Tells Asterisk the State for Device is changed
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* \param fmt devicename like a dialstring with format parameters
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* Asterisk polls the new extensionstates and calls the registered
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* callbacks for the changed extensions
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* \retval 0 on success
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* \retval -1 on failure
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*/
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int ast_device_state_changed(const char *fmt, ...)
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__attribute__ ((format (printf, 1, 2)));
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/*!
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* \brief Tells Asterisk the State for Device is changed
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* \param device devicename like a dialstring
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* Asterisk polls the new extensionstates and calls the registered
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* callbacks for the changed extensions
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* \retval 0 on success
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* \retval -1 on failure
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*/
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int ast_device_state_changed_literal(const char *device);
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/*!
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* \brief Add device state provider
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* \param label to use in hint, like label:object
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* \param callback Callback
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* \retval 0 success
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* \retval -1 failure
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*/
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int ast_devstate_prov_add(const char *label, ast_devstate_prov_cb_type callback);
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/*!
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* \brief Remove device state provider
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* \param label to use in hint, like label:object
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* \retval 0 on success
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* \retval -1 on failure
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*/
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int ast_devstate_prov_del(const char *label);
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#if defined(__cplusplus) || defined(c_plusplus)
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}
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#endif
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#endif /* _ASTERISK_DEVICESTATE_H */
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