WebSVN – Kolibri OS – Blame – /drivers/acpi/acpica/nsxfobj.c

Rev	Author	Line No.	Line
6595	serge	1	/*******************************************************************************
		2	*
		3	* Module Name: nsxfobj - Public interfaces to the ACPI subsystem
		4	* ACPI Object oriented interfaces
		5	*
		6	******************************************************************************/
		7
		8	/*
		9	* Copyright (C) 2000 - 2015, Intel Corp.
		10	* All rights reserved.
		11	*
		12	* Redistribution and use in source and binary forms, with or without
		13	* modification, are permitted provided that the following conditions
		14	* are met:
		15	* 1. Redistributions of source code must retain the above copyright
		16	* notice, this list of conditions, and the following disclaimer,
		17	* without modification.
		18	* 2. Redistributions in binary form must reproduce at minimum a disclaimer
		19	* substantially similar to the "NO WARRANTY" disclaimer below
		20	* ("Disclaimer") and any redistribution must be conditioned upon
		21	* including a substantially similar Disclaimer requirement for further
		22	* binary redistribution.
		23	* 3. Neither the names of the above-listed copyright holders nor the names
		24	* of any contributors may be used to endorse or promote products derived
		25	* from this software without specific prior written permission.
		26	*
		27	* Alternatively, this software may be distributed under the terms of the
		28	* GNU General Public License ("GPL") version 2 as published by the Free
		29	* Software Foundation.
		30	*
		31	* NO WARRANTY
		32	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
		33	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
		34	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
		35	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
		36	* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
		37	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
		38	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
		39	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
		40	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
		41	* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
		42	* POSSIBILITY OF SUCH DAMAGES.
		43	*/
		44
		45	#define EXPORT_ACPI_INTERFACES
		46
		47	#include
		48	#include "accommon.h"
		49	#include "acnamesp.h"
		50
		51	#define _COMPONENT ACPI_NAMESPACE
		52	ACPI_MODULE_NAME("nsxfobj")
		53
		54	/*******************************************************************************
		55	*
		56	* FUNCTION: acpi_get_type
		57	*
		58	* PARAMETERS: handle - Handle of object whose type is desired
		59	* ret_type - Where the type will be placed
		60	*
		61	* RETURN: Status
		62	*
		63	* DESCRIPTION: This routine returns the type associatd with a particular handle
		64	*
		65	******************************************************************************/
		66	acpi_status acpi_get_type(acpi_handle handle, acpi_object_type * ret_type)
		67	{
		68	struct acpi_namespace_node *node;
		69	acpi_status status;
		70
		71	/* Parameter Validation */
		72
		73	if (!ret_type) {
		74	return (AE_BAD_PARAMETER);
		75	}
		76
		77	/*
		78	* Special case for the predefined Root Node
		79	* (return type ANY)
		80	*/
		81	if (handle == ACPI_ROOT_OBJECT) {
		82	*ret_type = ACPI_TYPE_ANY;
		83	return (AE_OK);
		84	}
		85
		86	status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
		87	if (ACPI_FAILURE(status)) {
		88	return (status);
		89	}
		90
		91	/* Convert and validate the handle */
		92
		93	node = acpi_ns_validate_handle(handle);
		94	if (!node) {
		95	(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
		96	return (AE_BAD_PARAMETER);
		97	}
		98
		99	*ret_type = node->type;
		100
		101	status = acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
		102	return (status);
		103	}
		104
		105	ACPI_EXPORT_SYMBOL(acpi_get_type)
		106
		107	/*******************************************************************************
		108	*
		109	* FUNCTION: acpi_get_parent
		110	*
		111	* PARAMETERS: handle - Handle of object whose parent is desired
		112	* ret_handle - Where the parent handle will be placed
		113	*
		114	* RETURN: Status
		115	*
		116	* DESCRIPTION: Returns a handle to the parent of the object represented by
		117	* Handle.
		118	*
		119	******************************************************************************/
		120	acpi_status acpi_get_parent(acpi_handle handle, acpi_handle * ret_handle)
		121	{
		122	struct acpi_namespace_node *node;
		123	struct acpi_namespace_node *parent_node;
		124	acpi_status status;
		125
		126	if (!ret_handle) {
		127	return (AE_BAD_PARAMETER);
		128	}
		129
		130	/* Special case for the predefined Root Node (no parent) */
		131
		132	if (handle == ACPI_ROOT_OBJECT) {
		133	return (AE_NULL_ENTRY);
		134	}
		135
		136	status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
		137	if (ACPI_FAILURE(status)) {
		138	return (status);
		139	}
		140
		141	/* Convert and validate the handle */
		142
		143	node = acpi_ns_validate_handle(handle);
		144	if (!node) {
		145	status = AE_BAD_PARAMETER;
		146	goto unlock_and_exit;
		147	}
		148
		149	/* Get the parent entry */
		150
		151	parent_node = node->parent;
		152	*ret_handle = ACPI_CAST_PTR(acpi_handle, parent_node);
		153
		154	/* Return exception if parent is null */
		155
		156	if (!parent_node) {
		157	status = AE_NULL_ENTRY;
		158	}
		159
		160	unlock_and_exit:
		161
		162	(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
		163	return (status);
		164	}
		165
		166	ACPI_EXPORT_SYMBOL(acpi_get_parent)
		167
		168	/*******************************************************************************
		169	*
		170	* FUNCTION: acpi_get_next_object
		171	*
		172	* PARAMETERS: type - Type of object to be searched for
		173	* parent - Parent object whose children we are getting
		174	* last_child - Previous child that was found.
		175	* The NEXT child will be returned
		176	* ret_handle - Where handle to the next object is placed
		177	*
		178	* RETURN: Status
		179	*
		180	* DESCRIPTION: Return the next peer object within the namespace. If Handle is
		181	* valid, Scope is ignored. Otherwise, the first object within
		182	* Scope is returned.
		183	*
		184	******************************************************************************/
		185	acpi_status
		186	acpi_get_next_object(acpi_object_type type,
		187	acpi_handle parent,
		188	acpi_handle child, acpi_handle * ret_handle)
		189	{
		190	acpi_status status;
		191	struct acpi_namespace_node *node;
		192	struct acpi_namespace_node *parent_node = NULL;
		193	struct acpi_namespace_node *child_node = NULL;
		194
		195	/* Parameter validation */
		196
		197	if (type > ACPI_TYPE_EXTERNAL_MAX) {
		198	return (AE_BAD_PARAMETER);
		199	}
		200
		201	status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
		202	if (ACPI_FAILURE(status)) {
		203	return (status);
		204	}
		205
		206	/* If null handle, use the parent */
		207
		208	if (!child) {
		209
		210	/* Start search at the beginning of the specified scope */
		211
		212	parent_node = acpi_ns_validate_handle(parent);
		213	if (!parent_node) {
		214	status = AE_BAD_PARAMETER;
		215	goto unlock_and_exit;
		216	}
		217	} else {
		218	/* Non-null handle, ignore the parent */
		219	/* Convert and validate the handle */
		220
		221	child_node = acpi_ns_validate_handle(child);
		222	if (!child_node) {
		223	status = AE_BAD_PARAMETER;
		224	goto unlock_and_exit;
		225	}
		226	}
		227
		228	/* Internal function does the real work */
		229
		230	node = acpi_ns_get_next_node_typed(type, parent_node, child_node);
		231	if (!node) {
		232	status = AE_NOT_FOUND;
		233	goto unlock_and_exit;
		234	}
		235
		236	if (ret_handle) {
		237	*ret_handle = ACPI_CAST_PTR(acpi_handle, node);
		238	}
		239
		240	unlock_and_exit:
		241
		242	(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
		243	return (status);
		244	}
		245
		246	ACPI_EXPORT_SYMBOL(acpi_get_next_object)

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(root)/drivers/acpi/acpica/nsxfobj.c – Rev 7584