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Change the write-up on taskprocessors to reflect the new design.

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git-svn-id: https://origsvn.digium.com/svn/asterisk/team/mmichelson/threadpool@376382 65c4cc65-6c06-0410-ace0-fbb531ad65f3
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Mark Michelson
2012-11-16 04:44:12 +00:00
parent 12de4198b8
commit 2b36cbe2d5
1 changed files with 15 additions and 9 deletions
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24
include/asterisk/taskprocessor.h
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@@ -22,22 +22,28 @@
*
* \author Dwayne M. Hubbard <dhubbard@digium.com>
*
* \note A taskprocessor is a named singleton containing a processing thread and
* a task queue that serializes tasks pushed into it by [a] module(s) that reference the taskprocessor.
* A taskprocessor is created the first time its name is requested via the ast_taskprocessor_get()
* function and destroyed when the taskprocessor reference count reaches zero.
* \note A taskprocessor is a named singleton containing a task queue that serializes tasks pushed
* into it by [a] module(s) that reference the taskprocessor. A taskprocessor is created the first
* time its name is requested via the ast_taskprocessor_get() function and destroyed when the
* taskprocessor reference count reaches zero. A taskprocessor also contains an accompanying
* listener that is told when changes in the task queue occur.
*
* Modules that obtain a reference to a taskprocessor can queue tasks into the taskprocessor
* to be processed by the singleton processing thread when the task is popped off the front
* of the queue. A task is a wrapper around a task-handling function pointer and a data
* pointer. It is the responsibility of the task handling function to free memory allocated for
* the task data pointer. A task is pushed into a taskprocessor queue using the
* A task is a wrapper around a task-handling function pointer and a data
* pointer. A task is pushed into a taskprocessor queue using the
* ast_taskprocessor_push(taskprocessor, taskhandler, taskdata) function and freed by the
* taskprocessor after the task handling function returns. A module releases its reference to a
* taskprocessor using the ast_taskprocessor_unreference() function which may result in the
* destruction of the taskprocessor if the taskprocessor's reference count reaches zero. Tasks waiting
* to be processed in the taskprocessor queue when the taskprocessor reference count reaches zero
* will be purged and released from the taskprocessor queue without being processed.
*
* The taskprocessor listener has the flexibility of doling out tasks to best fit the module's
* needs. For instance, a taskprocessor listener may have a single dispatch thread that handles
* all tasks, or it may dispatch tasks to a thread pool.
*
* There is a default taskprocessor listener that will be used if a taskprocessor is created without
* a listener. This default listener runs tasks sequentially in a single thread. The listener will
* execute tasks as long as there are tasks to be processed.
*/
#ifndef __AST_TASKPROCESSOR_H__