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ntp 4.2.6p5

    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 1.1.1.1 2012/05/29 12:08:38 misho 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: