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📄 base32.c(9.64 KB)
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📄 fsaccess.c(2.7 KB)
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📄 inet_aton.c(6.4 KB)
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📄 lib.c(2.67 KB)
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📄 md5.c(8.57 KB)
📄 mem.c(58.91 KB)
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📄 mutexblock.c(1.54 KB)
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📄 ondestroy.c(2.16 KB)
📄 parseint.c(2.04 KB)
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📁 powerpc
📄 print.c(12.16 KB)
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📄 quota.c(2.37 KB)
📄 radix.c(16.77 KB)
📄 random.c(2.61 KB)
📄 ratelimiter.c(8.15 KB)
📄 refcount.c(1.21 KB)
📄 region.c(1.39 KB)
📄 result.c(5.81 KB)
📄 rwlock.c(22.19 KB)
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📄 sha2.c(40.33 KB)
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📄 socket_api.c(5.57 KB)
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📄 stats.c(8.26 KB)
📄 string.c(5.33 KB)
📄 strtoul.c(4.23 KB)
📄 symtab.c(7.21 KB)
📄 task.c(45.62 KB)
📄 task_api.c(5.62 KB)
📄 task_p.h(1.27 KB)
📄 taskpool.c(4.4 KB)
📁 tests
📄 timer.c(26.04 KB)
📄 timer_api.c(3.49 KB)
📄 timer_p.h(1.13 KB)
📄 tsmemcmp.c(2.04 KB)
📁 unix
📄 version.c(1.11 KB)
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📁 x86_64

Editing: taskpool.c

/*
 * Copyright (C) 2004, 2005, 2007, 2011, 2012  Internet Systems Consortium, Inc. ("ISC")
 * Copyright (C) 1999-2001  Internet Software Consortium.
 *
 * Permission to use, copy, modify, and/or 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.
 */

/* $Id$ */

/*! \file */

#include <config.h>

#include <isc/mem.h>
#include <isc/random.h>
#include <isc/taskpool.h>
#include <isc/util.h>

/***
 *** Types.
 ***/

struct isc_taskpool {
	isc_mem_t *			mctx;
	isc_taskmgr_t *			tmgr;
	unsigned int			ntasks;
	unsigned int			quantum;
	isc_task_t **			tasks;
};

/***
 *** Functions.
 ***/

static isc_result_t
alloc_pool(isc_taskmgr_t *tmgr, isc_mem_t *mctx, unsigned int ntasks,
	   unsigned int quantum, isc_taskpool_t **poolp)
{
	isc_taskpool_t *pool;
	unsigned int i;

pool = isc_mem_get(mctx, sizeof(*pool));
	if (pool == NULL)
		return (ISC_R_NOMEMORY);
	pool->mctx = mctx;
	pool->ntasks = ntasks;
	pool->quantum = quantum;
	pool->tmgr = tmgr;
	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;

*poolp = pool;
	return (ISC_R_SUCCESS);
}

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 = NULL;
	isc_result_t result;

INSIST(ntasks > 0);

/* Allocate the pool structure */
	result = alloc_pool(tmgr, mctx, ntasks, quantum, &pool);
	if (result != ISC_R_SUCCESS)
		return (result);

/* Create the tasks */
	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, isc_task_t **targetp) {
	isc_uint32_t i;
	isc_random_get(&i);
	isc_task_attach(pool->tasks[i % pool->ntasks], targetp);
}

int
isc_taskpool_size(isc_taskpool_t *pool) {
	REQUIRE(pool != NULL);
	return (pool->ntasks);
}

isc_result_t
isc_taskpool_expand(isc_taskpool_t **sourcep, unsigned int size,
		    isc_taskpool_t **targetp)
{
	isc_result_t result;
	isc_taskpool_t *pool;

REQUIRE(sourcep != NULL && *sourcep != NULL);
	REQUIRE(targetp != NULL && *targetp == NULL);

pool = *sourcep;
	if (size > pool->ntasks) {
		isc_taskpool_t *newpool = NULL;
		unsigned int i;

/* Allocate a new pool structure */
		result = alloc_pool(pool->tmgr, pool->mctx, size,
				    pool->quantum, &newpool);
		if (result != ISC_R_SUCCESS)
			return (result);

/* Copy over the tasks from the old pool */
		for (i = 0; i < pool->ntasks; i++) {
			newpool->tasks[i] = pool->tasks[i];
			pool->tasks[i] = NULL;
		}

/* Create new tasks */
		for (i = pool->ntasks; i < size; i++) {
			result = isc_task_create(pool->tmgr, pool->quantum,
						 &newpool->tasks[i]);
			if (result != ISC_R_SUCCESS) {
				isc_taskpool_destroy(&newpool);
				return (result);
			}
			isc_task_setname(newpool->tasks[i], "taskpool", NULL);
		}

isc_taskpool_destroy(&pool);
		pool = newpool;
	}

*sourcep = NULL;
	*targetp = pool;
	return (ISC_R_SUCCESS);
}

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;
}

void
isc_taskpool_setprivilege(isc_taskpool_t *pool, isc_boolean_t priv) {
	unsigned int i;

REQUIRE(pool != NULL);

for (i = 0; i < pool->ntasks; i++) {
		if (pool->tasks[i] != NULL)
			isc_task_setprivilege(pool->tasks[i], priv);
	}
}

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Editing: taskpool.c

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