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- /*
- * Copyright (C) 2004, 2005 Internet Systems Consortium, Inc. ("ISC")
- * Copyright (C) 1999-2001 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 ISC DISCLAIMS ALL WARRANTIES WITH
- * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
- * AND FITNESS. IN NO EVENT SHALL ISC 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 1.9.18.2 2005/04/29 00:17:04 marka Exp $ */
-
- #ifndef ISC_TASKPOOL_H
- #define ISC_TASKPOOL_H 1
-
- /*****
- ***** Module Info
- *****/
-
- /*! \file
- * \brief 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:
- *
- *\li 'tmgr' is a valid task manager.
- *
- *\li 'mctx' is a valid memory context.
- *
- *\li poolp != NULL && *poolp == NULL
- *
- * Ensures:
- *
- *\li On success, '*taskp' points to the new task pool.
- *
- * Returns:
- *
- *\li #ISC_R_SUCCESS
- *\li #ISC_R_NOMEMORY
- *\li #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:
- * \li '*poolp' is a valid task pool.
- */
-
- ISC_LANG_ENDDECLS
-
- #endif /* ISC_TASKPOOL_H */
-