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107 lines
2.5 KiB
C
107 lines
2.5 KiB
C
/*
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* Copyright (C) 2004 Internet Systems Consortium, Inc. ("ISC")
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* Copyright (C) 1999-2001 Internet Software Consortium.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
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* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
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* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
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* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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/* $Id: taskpool.h,v 1.8.206.1 2004/03/06 08:14:49 marka Exp $ */
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#ifndef ISC_TASKPOOL_H
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#define ISC_TASKPOOL_H 1
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/*****
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***** Module Info
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*****/
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/*
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* Task Pool
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*
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* A task pool is a mechanism for sharing a small number of tasks
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* among a large number of objects such that each object is
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* assigned a unique task, but each task may be shared by several
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* objects.
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*
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* Task pools are used to let objects that can exist in large
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* numbers (e.g., zones) use tasks for synchronization without
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* the memory overhead and unfair scheduling competition that
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* could result from creating a separate task for each object.
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*/
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/***
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*** Imports.
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***/
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#include <isc/lang.h>
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#include <isc/task.h>
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ISC_LANG_BEGINDECLS
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/*****
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***** Types.
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*****/
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typedef struct isc_taskpool isc_taskpool_t;
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/*****
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***** Functions.
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*****/
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isc_result_t
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isc_taskpool_create(isc_taskmgr_t *tmgr, isc_mem_t *mctx,
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unsigned int ntasks, unsigned int quantum,
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isc_taskpool_t **poolp);
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/*
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* Create a task pool of "ntasks" tasks, each with quantum
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* "quantum".
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*
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* Requires:
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*
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* 'tmgr' is a valid task manager.
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*
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* 'mctx' is a valid memory context.
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*
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* poolp != NULL && *poolp == NULL
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*
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* Ensures:
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*
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* On success, '*taskp' points to the new task pool.
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*
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* Returns:
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*
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* ISC_R_SUCCESS
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* ISC_R_NOMEMORY
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* ISC_R_UNEXPECTED
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*/
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void
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isc_taskpool_gettask(isc_taskpool_t *pool, unsigned int hash,
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isc_task_t **targetp);
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/*
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* Attach to the task corresponding to the hash value "hash".
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*/
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void
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isc_taskpool_destroy(isc_taskpool_t **poolp);
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/*
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* Destroy a task pool. The tasks in the pool are detached but not
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* shut down.
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*
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* Requires:
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* '*poolp' is a valid task pool.
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*/
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ISC_LANG_ENDDECLS
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#endif /* ISC_TASKPOOL_H */
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