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e7ce12839d
That's a milestone, of sorts. Things really need arranging/documenting, and there's no function to be able to push tasks to a threadpool. git-svn-id: https://origsvn.digium.com/svn/asterisk/team/mmichelson/threadpool@377036 65c4cc65-6c06-0410-ace0-fbb531ad65f3
103 lines
3.2 KiB
C
103 lines
3.2 KiB
C
/*
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* Asterisk -- An open source telephony toolkit.
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*
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* Copyright (C) 2012, Digium, Inc.
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*
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* Mark Michelson <mmmichelson@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_THREADPOOL_H
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#define _ASTERISK_THREADPOOL_H
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struct ast_threadpool;
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struct ast_taskprocessor;
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struct ast_threadpool_listener;
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struct ast_threadpool_listener_callbacks {
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/*!
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* \brief Indicates that the state of threads in the pool has changed
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*
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* \param listener The threadpool listener
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* \param active_threads The number of active threads in the pool
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* \param idle_threads The number of idle threads in the pool
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* \param zombie_threads The number of zombie threads in the pool
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*/
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void (*state_changed)(struct ast_threadpool_listener *listener,
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int active_threads,
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int idle_threads,
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int zombie_threads);
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/*!
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* \brief Indicates that a task was pushed to the threadpool's taskprocessor
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*
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* \param listener The threadpool listener
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* \param was_empty Indicates whether the taskprocessor was empty prior to adding the task
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*/
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void (*tps_task_pushed)(struct ast_threadpool_listener *listener,
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int was_empty);
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/*!
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* \brief Indicates the threadpoo's taskprocessor has become empty
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*
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* \param listener The threadpool's listener
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*/
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void (*emptied)(struct ast_threadpool_listener *listener);
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};
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/*!
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* \brief listener for a threadpool
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*
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* The listener is notified of changes in a threadpool. It can
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* react by doing things like increasing the number of threads
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* in the pool
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*/
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struct ast_threadpool_listener {
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/*! Callbacks called by the threadpool */
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struct ast_threadpool_listener_callbacks *callbacks;
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/*! Handle to the threadpool */
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struct ast_threadpool *threadpool;
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/*! User data for the listener */
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void *private_data;
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};
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/*!
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* \brief Create a new threadpool
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*
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* This function creates a threadpool. Tasks may be pushed onto this thread pool
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* in and will be automatically acted upon by threads within the pool.
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*
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* \param listener The listener the threadpool will notify of changes
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* \param initial_size The number of threads for the pool to start with
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* \retval NULL Failed to create the threadpool
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* \retval non-NULL The newly-created threadpool
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*/
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struct ast_threadpool *ast_threadpool_create(struct ast_threadpool_listener *listener, int initial_size);
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/*!
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* \brief Set the number of threads for the thread pool
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*
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* This number may be more or less than the current number of
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* threads in the threadpool.
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*
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* \param threadpool The threadpool to adjust
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* \param size The new desired size of the threadpool
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*/
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void ast_threadpool_set_size(struct ast_threadpool *threadpool, unsigned int size);
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/*!
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* \brief Shut down a threadpool and destroy it
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*
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* \param pool The pool to shut down
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*/
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void ast_threadpool_shutdown(struct ast_threadpool *pool);
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#endif /* ASTERISK_THREADPOOL_H */
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