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Annotation of embedaddon/ntp/lib/isc/taskpool.c, revision 1.1

1.1     ! misho       1: /*
        !             2:  * Copyright (C) 2004, 2005, 2007  Internet Systems Consortium, Inc. ("ISC")
        !             3:  * Copyright (C) 1999-2001  Internet Software Consortium.
        !             4:  *
        !             5:  * Permission to use, copy, modify, and/or distribute this software for any
        !             6:  * purpose with or without fee is hereby granted, provided that the above
        !             7:  * copyright notice and this permission notice appear in all copies.
        !             8:  *
        !             9:  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
        !            10:  * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
        !            11:  * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
        !            12:  * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
        !            13:  * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
        !            14:  * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
        !            15:  * PERFORMANCE OF THIS SOFTWARE.
        !            16:  */
        !            17: 
        !            18: /* $Id: taskpool.c,v 1.18 2007/06/18 23:47:44 tbox Exp $ */
        !            19: 
        !            20: /*! \file */
        !            21: 
        !            22: #include <config.h>
        !            23: 
        !            24: #include <isc/mem.h>
        !            25: #include <isc/taskpool.h>
        !            26: #include <isc/util.h>
        !            27: 
        !            28: /***
        !            29:  *** Types.
        !            30:  ***/
        !            31: 
        !            32: struct isc_taskpool {
        !            33:        isc_mem_t *                     mctx;
        !            34:        unsigned int                    ntasks;
        !            35:        isc_task_t **                   tasks;
        !            36: };
        !            37: /***
        !            38:  *** Functions.
        !            39:  ***/
        !            40: 
        !            41: isc_result_t
        !            42: isc_taskpool_create(isc_taskmgr_t *tmgr, isc_mem_t *mctx,
        !            43:                    unsigned int ntasks, unsigned int quantum,
        !            44:                    isc_taskpool_t **poolp)
        !            45: {
        !            46:        unsigned int i;
        !            47:        isc_taskpool_t *pool;
        !            48:        isc_result_t result;
        !            49: 
        !            50:        INSIST(ntasks > 0);
        !            51:        pool = isc_mem_get(mctx, sizeof(*pool));
        !            52:        if (pool == NULL)
        !            53:                return (ISC_R_NOMEMORY);
        !            54:        pool->mctx = mctx;
        !            55:        pool->ntasks = ntasks;
        !            56:        pool->tasks = isc_mem_get(mctx, ntasks * sizeof(isc_task_t *));
        !            57:        if (pool->tasks == NULL) {
        !            58:                isc_mem_put(mctx, pool, sizeof(*pool));
        !            59:                return (ISC_R_NOMEMORY);
        !            60:        }
        !            61:        for (i = 0; i < ntasks; i++)
        !            62:                pool->tasks[i] = NULL;
        !            63:        for (i = 0; i < ntasks; i++) {
        !            64:                result = isc_task_create(tmgr, quantum, &pool->tasks[i]);
        !            65:                if (result != ISC_R_SUCCESS) {
        !            66:                        isc_taskpool_destroy(&pool);
        !            67:                        return (result);
        !            68:                }
        !            69:                isc_task_setname(pool->tasks[i], "taskpool", NULL);
        !            70:        }
        !            71:        *poolp = pool;
        !            72:        return (ISC_R_SUCCESS);
        !            73: }
        !            74: 
        !            75: void isc_taskpool_gettask(isc_taskpool_t *pool, unsigned int hash,
        !            76:                          isc_task_t **targetp)
        !            77: {
        !            78:        isc_task_attach(pool->tasks[hash % pool->ntasks], targetp);
        !            79: }
        !            80: 
        !            81: void
        !            82: isc_taskpool_destroy(isc_taskpool_t **poolp) {
        !            83:        unsigned int i;
        !            84:        isc_taskpool_t *pool = *poolp;
        !            85:        for (i = 0; i < pool->ntasks; i++) {
        !            86:                if (pool->tasks[i] != NULL) {
        !            87:                        isc_task_detach(&pool->tasks[i]);
        !            88:                }
        !            89:        }
        !            90:        isc_mem_put(pool->mctx, pool->tasks,
        !            91:                    pool->ntasks * sizeof(isc_task_t *));
        !            92:        isc_mem_put(pool->mctx, pool, sizeof(*pool));
        !            93:        *poolp = NULL;
        !            94: }
        !            95: 
        !            96: