taskpool.c revision cdce8b88c63f864cb5c91aa128c1cf4523638500
/*
* Copyright (C) 2004, 2005, 2007 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.c,v 1.17 2007/02/14 00:27:26 marka Exp $ */
/*! \file */
#include <config.h>
#include <isc/mem.h>
#include <isc/taskpool.h>
#include <isc/util.h>
/***
*** Types.
***/
struct isc_taskpool {
isc_mem_t * mctx;
unsigned int ntasks;
isc_task_t ** tasks;
};
/***
*** 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)
{
unsigned int i;
isc_taskpool_t *pool;
isc_result_t result;
INSIST(ntasks > 0);
pool = isc_mem_get(mctx, sizeof(*pool));
if (pool == NULL)
return (ISC_R_NOMEMORY);
pool->mctx = mctx;
pool->ntasks = ntasks;
pool->tasks = isc_mem_get(mctx, ntasks * sizeof(isc_task_t *));
if (pool->tasks == NULL) {
isc_mem_put(mctx, pool, sizeof(*pool));
return (ISC_R_NOMEMORY);
}
for (i = 0; i < ntasks; i++)
pool->tasks[i] = NULL;
for (i = 0; i < ntasks; i++) {
result = isc_task_create(tmgr, quantum, &pool->tasks[i]);
if (result != ISC_R_SUCCESS) {
isc_taskpool_destroy(&pool);
return (result);
}
isc_task_setname(pool->tasks[i], "taskpool", NULL);
}
*poolp = pool;
return (ISC_R_SUCCESS);
}
void isc_taskpool_gettask(isc_taskpool_t *pool, unsigned int hash,
isc_task_t **targetp)
{
isc_task_attach(pool->tasks[hash % pool->ntasks], targetp);
}
void
isc_taskpool_destroy(isc_taskpool_t **poolp) {
unsigned int i;
isc_taskpool_t *pool = *poolp;
for (i = 0; i < pool->ntasks; i++) {
if (pool->tasks[i] != NULL) {
isc_task_detach(&pool->tasks[i]);
}
}
isc_mem_put(pool->mctx, pool->tasks,
pool->ntasks * sizeof(isc_task_t *));
isc_mem_put(pool->mctx, pool, sizeof(*pool));
*poolp = NULL;
}