mirror of
https://github.com/isc-projects/bind9.git
synced 2026-02-17 01:31:32 -05:00
106 lines
2.5 KiB
C
106 lines
2.5 KiB
C
/*
|
|
* Copyright (C) 1999, 2000 Internet Software Consortium.
|
|
*
|
|
* Permission to use, copy, modify, and distribute this software for any
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|
* copyright notice and this permission notice appear in all copies.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
|
|
* ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
|
|
* CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
|
|
* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
|
|
* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
|
|
* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
|
|
* SOFTWARE.
|
|
*/
|
|
|
|
/* $Id: taskpool.h,v 1.4 2000/06/22 21:58:09 tale Exp $ */
|
|
|
|
#ifndef ISC_TASKPOOL_H
|
|
#define ISC_TASKPOOL_H 1
|
|
|
|
/*****
|
|
***** Module Info
|
|
*****/
|
|
|
|
/*
|
|
* Task Pool
|
|
*
|
|
* A task pool is a mechanism for sharing a small number of tasks
|
|
* among a large number of objects such that each object is
|
|
* assigned a unique task, but each task may be shared by several
|
|
* objects.
|
|
*
|
|
* Task pools are used to let objects that can exist in large
|
|
* numbers (e.g., zones) use tasks for synchronization without
|
|
* the memory overhead and unfair scheduling competition that
|
|
* could result from creating a separate task for each object.
|
|
*/
|
|
|
|
|
|
/***
|
|
*** Imports.
|
|
***/
|
|
|
|
#include <isc/lang.h>
|
|
#include <isc/task.h>
|
|
|
|
ISC_LANG_BEGINDECLS
|
|
|
|
/*****
|
|
***** Types.
|
|
*****/
|
|
|
|
typedef struct isc_taskpool isc_taskpool_t;
|
|
|
|
/*****
|
|
***** Functions.
|
|
*****/
|
|
|
|
isc_result_t
|
|
isc_taskpool_create(isc_taskmgr_t *tmgr, isc_mem_t *mctx,
|
|
unsigned int ntasks, unsigned int quantum,
|
|
isc_taskpool_t **poolp);
|
|
/*
|
|
* Create a task pool of "ntasks" tasks, each with quantum
|
|
* "quantum".
|
|
*
|
|
* Requires:
|
|
*
|
|
* 'tmgr' is a valid task manager.
|
|
*
|
|
* 'mctx' is a valid memory context.
|
|
*
|
|
* poolp != NULL && *poolp == NULL
|
|
*
|
|
* Ensures:
|
|
*
|
|
* On success, '*taskp' points to the new task pool.
|
|
*
|
|
* Returns:
|
|
*
|
|
* ISC_R_SUCCESS
|
|
* ISC_R_NOMEMORY
|
|
* ISC_R_UNEXPECTED
|
|
*/
|
|
|
|
void isc_taskpool_gettask(isc_taskpool_t *pool, unsigned int hash,
|
|
isc_task_t **targetp);
|
|
/*
|
|
* Attach to the task corresponding to the hash value "hash".
|
|
*/
|
|
|
|
void
|
|
isc_taskpool_destroy(isc_taskpool_t **poolp);
|
|
/*
|
|
* Destroy a task pool. The tasks in the pool are detached but not
|
|
* shut down.
|
|
*
|
|
* Requires:
|
|
* '*poolp' is a valid task pool.
|
|
*/
|
|
|
|
ISC_LANG_ENDDECLS
|
|
|
|
#endif /* ISC_TASKPOOL_H */
|