res_statsis's app loop sleeps for up to .2s waiting on input
to a channel before re-checking the command queue. This can
cause delays between channel setup and bridge.
This change is to send a SIGURG on the sleeping thread when
a new command is enqueued. This exits the sleeping thread out
of the ast_waitfor() call triggering the new command being
processed on the channel immediately.
Resolves: #362
UserNote: Call setup times should be significantly improved
when using ARI.
(cherry picked from commit 79220e3f0c
)
198 lines
5.8 KiB
C
198 lines
5.8 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 2013, Digium, Inc.
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*
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* David M. Lee, II <dlee@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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#ifndef _ASTERISK_RES_STASIS_CONTROL_H
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#define _ASTERISK_RES_STASIS_CONTROL_H
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/*! \file
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*
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* \brief Internal API for the Stasis application controller.
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*
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* \author David M. Lee, II <dlee@digium.com>
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* \since 12
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*/
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#include "asterisk/stasis_app.h"
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/*!
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* \brief Create a control object.
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*
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* \param channel Channel to control.
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* \param app stasis_app for which this control is being created.
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*
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* \return New control object.
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* \retval NULL on error.
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*/
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struct stasis_app_control *control_create(struct ast_channel *channel, struct stasis_app *app);
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/*!
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* \brief Flush the control command queue.
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* \since 13.9.0
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*
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* \param control Control object to flush command queue.
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*/
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void control_flush_queue(struct stasis_app_control *control);
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/*!
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* \brief set the control's thread id
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* \since 18
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*
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* \param control Control object on which to set the thread id.
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* \param threadid id to set
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*/
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void control_set_thread(struct stasis_app_control *control, pthread_t threadid);
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/*!
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* \brief Dispatch all commands enqueued to this control.
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*
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* \param control Control object to dispatch.
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* \param chan Associated channel.
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* \return Number of commands executed
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*/
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int control_dispatch_all(struct stasis_app_control *control,
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struct ast_channel *chan);
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/*!
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* \brief Blocks until \a control's command queue has a command available.
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*
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* \param control Control to block on.
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*/
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void control_wait(struct stasis_app_control *control);
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/*!
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* \brief Returns the count of items in a control's command queue.
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*
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* \param control Control to count commands on
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*
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* \return number of commands in the command que
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*/
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int control_command_count(struct stasis_app_control *control);
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/*!
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* \brief Returns true if control_continue() has been called on this \a control.
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*
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* \param control Control to query.
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* \retval True (non-zero) if control_continue() has been called.
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* \retval False (zero) otherwise.
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*/
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int control_is_done(struct stasis_app_control *control);
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void control_mark_done(struct stasis_app_control *control);
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/*!
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* \brief Dispatch all queued prestart commands
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*
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* \param control The control for chan
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* \param chan The channel on which commands should be executed
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*
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* \return The number of commands executed
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*/
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int control_prestart_dispatch_all(struct stasis_app_control *control,
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struct ast_channel *chan);
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/*!
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* \brief Returns the pointer (non-reffed) to the app associated with this control
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*
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* \param control Control to query.
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*
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* \return A pointer to the associated stasis_app
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*/
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struct stasis_app *control_app(struct stasis_app_control *control);
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/*!
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* \brief Set the application the control object belongs to
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*
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* \param control The control for the channel
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* \param app The application this control will now belong to
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*
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* \note This will unref control's previous app by 1, and bump app by 1
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*/
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void control_set_app(struct stasis_app_control *control, struct stasis_app *app);
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/*!
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* \brief Returns the name of the application we are moving to
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*
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* \param control The control for the channel
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*
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* \return The name of the application we are moving to
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*/
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char *control_next_app(struct stasis_app_control *control);
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/*!
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* \brief Free any memory that was allocated for switching applications via
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* /channels/{channelId}/move
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*
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* \param control The control for the channel
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*/
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void control_move_cleanup(struct stasis_app_control *control);
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/*!
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* \brief Returns the list of arguments to pass to the application we are moving to
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*
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* \note If you wish to get the size of the list, control_next_app_args_size should be
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* called before this, as this function will steal the elements from the string vector
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* and set the size to 0.
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*
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* \param control The control for the channel
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*
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* \return The arguments to pass to the application we are moving to
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*/
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char **control_next_app_args(struct stasis_app_control *control);
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/*!
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* \brief Returns the number of arguments to be passed to the application we are moving to
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*
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* \note This should always be called before control_next_app_args, as calling that function
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* will steal all elements from the string vector and set the size to 0.
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*
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* \param control The control for the channel
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*
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* \return The number of arguments to be passed to the application we are moving to
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*/
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int control_next_app_args_size(struct stasis_app_control *control);
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/*!
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* \brief Command callback for adding a channel to a bridge
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*
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* \param control The control for chan
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* \param chan The channel on which commands should be executed
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* \param data Bridge to be passed to the callback
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*/
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int control_add_channel_to_bridge(struct stasis_app_control *control, struct ast_channel *chan, void *data);
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/*!
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* \brief Command for swapping a channel in a bridge
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*
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* \param control The control for chan
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* \param chan The channel on which commands should be executed
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* \param bridge Bridge to be passed to the callback
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* \param swap Channel to swap with when joining the bridge
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*/
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int control_swap_channel_in_bridge(struct stasis_app_control *control, struct ast_bridge *bridge, struct ast_channel *chan, struct ast_channel *swap);
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/*!
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* \brief Stop playing silence to a channel right now.
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* \since 13.9.0
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*
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* \param control The control for chan
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*/
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void control_silence_stop_now(struct stasis_app_control *control);
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#endif /* _ASTERISK_RES_STASIS_CONTROL_H */
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