Subversion Repositories test_project

/******************************************************************************

 *

 * Module Name: utalloc - local memory allocation routines

 *

 *****************************************************************************/

/*

 * Copyright (C) 2000 - 2007, R. Byron Moore

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions, and the following disclaimer,

 *    without modification.

 * 2. Redistributions in binary form must reproduce at minimum a disclaimer

 *    substantially similar to the "NO WARRANTY" disclaimer below

 *    ("Disclaimer") and any redistribution must be conditioned upon

 *    including a substantially similar Disclaimer requirement for further

 *    binary redistribution.

 * 3. Neither the names of the above-listed copyright holders nor the names

 *    of any contributors may be used to endorse or promote products derived

 *    from this software without specific prior written permission.

 *

 * Alternatively, this software may be distributed under the terms of the

 * GNU General Public License ("GPL") version 2 as published by the Free

 * Software Foundation.

 *

 * NO WARRANTY

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR

 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,

 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING

 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

 * POSSIBILITY OF SUCH DAMAGES.

 */

#include <acpi/acpi.h>

#include <acpi/acdebug.h>

#define _COMPONENT          ACPI_UTILITIES

ACPI_MODULE_NAME("utalloc")

/*******************************************************************************

 *

 * FUNCTION:    acpi_ut_create_caches

 *

 * PARAMETERS:  None

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Create all local caches

 *

 ******************************************************************************/

acpi_status acpi_ut_create_caches(void)

{

        acpi_status status;

        /* Object Caches, for frequently used objects */

        status =

            acpi_os_create_cache("Acpi-Namespace",

                                 sizeof(struct acpi_namespace_node),

                                 ACPI_MAX_NAMESPACE_CACHE_DEPTH,

                                 &acpi_gbl_namespace_cache);

        if (ACPI_FAILURE(status)) {

                return (status);

        }

        status =

            acpi_os_create_cache("Acpi-State", sizeof(union acpi_generic_state),

                                 ACPI_MAX_STATE_CACHE_DEPTH,

                                 &acpi_gbl_state_cache);

        if (ACPI_FAILURE(status)) {

                return (status);

        }

        status =

            acpi_os_create_cache("Acpi-Parse",

                                 sizeof(struct acpi_parse_obj_common),

                                 ACPI_MAX_PARSE_CACHE_DEPTH,

                                 &acpi_gbl_ps_node_cache);

        if (ACPI_FAILURE(status)) {

                return (status);

        }

        status =

            acpi_os_create_cache("Acpi-ParseExt",

                                 sizeof(struct acpi_parse_obj_named),

                                 ACPI_MAX_EXTPARSE_CACHE_DEPTH,

                                 &acpi_gbl_ps_node_ext_cache);

        if (ACPI_FAILURE(status)) {

                return (status);

        }

        status =

            acpi_os_create_cache("Acpi-Operand",

                                 sizeof(union acpi_operand_object),

                                 ACPI_MAX_OBJECT_CACHE_DEPTH,

                                 &acpi_gbl_operand_cache);

        if (ACPI_FAILURE(status)) {

                return (status);

        }

#ifdef ACPI_DBG_TRACK_ALLOCATIONS

        /* Memory allocation lists */

        status = acpi_ut_create_list("Acpi-Global", 0, &acpi_gbl_global_list);

        if (ACPI_FAILURE(status)) {

                return (status);

        }

        status =

            acpi_ut_create_list("Acpi-Namespace",

                                sizeof(struct acpi_namespace_node),

                                &acpi_gbl_ns_node_list);

        if (ACPI_FAILURE(status)) {

                return (status);

        }

#endif

        return (AE_OK);

}

/*******************************************************************************

 *

 * FUNCTION:    acpi_ut_delete_caches

 *

 * PARAMETERS:  None

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Purge and delete all local caches

 *

 ******************************************************************************/

acpi_status acpi_ut_delete_caches(void)

{

#ifdef ACPI_DBG_TRACK_ALLOCATIONS

        char buffer[7];

        if (acpi_gbl_display_final_mem_stats) {

                ACPI_STRCPY(buffer, "MEMORY");

                acpi_db_display_statistics(buffer);

        }

#endif

        (void)acpi_os_delete_cache(acpi_gbl_namespace_cache);

        acpi_gbl_namespace_cache = NULL;

        (void)acpi_os_delete_cache(acpi_gbl_state_cache);

        acpi_gbl_state_cache = NULL;

        (void)acpi_os_delete_cache(acpi_gbl_operand_cache);

        acpi_gbl_operand_cache = NULL;

        (void)acpi_os_delete_cache(acpi_gbl_ps_node_cache);

        acpi_gbl_ps_node_cache = NULL;

        (void)acpi_os_delete_cache(acpi_gbl_ps_node_ext_cache);

        acpi_gbl_ps_node_ext_cache = NULL;

#ifdef ACPI_DBG_TRACK_ALLOCATIONS

        /* Debug only - display leftover memory allocation, if any */

        acpi_ut_dump_allocations(ACPI_UINT32_MAX, NULL);

        /* Free memory lists */

        ACPI_FREE(acpi_gbl_global_list);

        acpi_gbl_global_list = NULL;

        ACPI_FREE(acpi_gbl_ns_node_list);

        acpi_gbl_ns_node_list = NULL;

#endif

        return (AE_OK);

}

/*******************************************************************************

 *

 * FUNCTION:    acpi_ut_validate_buffer

 *

 * PARAMETERS:  Buffer              - Buffer descriptor to be validated

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Perform parameter validation checks on an struct acpi_buffer

 *

 ******************************************************************************/

acpi_status acpi_ut_validate_buffer(struct acpi_buffer * buffer)

{

        /* Obviously, the structure pointer must be valid */

        if (!buffer) {

                return (AE_BAD_PARAMETER);

        }

        /* Special semantics for the length */

        if ((buffer->length == ACPI_NO_BUFFER) ||

            (buffer->length == ACPI_ALLOCATE_BUFFER) ||

            (buffer->length == ACPI_ALLOCATE_LOCAL_BUFFER)) {

                return (AE_OK);

        }

        /* Length is valid, the buffer pointer must be also */

        if (!buffer->pointer) {

                return (AE_BAD_PARAMETER);

        }

        return (AE_OK);

}

/*******************************************************************************

 *

 * FUNCTION:    acpi_ut_initialize_buffer

 *

 * PARAMETERS:  Buffer              - Buffer to be validated

 *              required_length     - Length needed

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Validate that the buffer is of the required length or

 *              allocate a new buffer.  Returned buffer is always zeroed.

 *

 ******************************************************************************/

acpi_status

acpi_ut_initialize_buffer(struct acpi_buffer * buffer,

                          acpi_size required_length)

{

        acpi_status status = AE_OK;

        switch (buffer->length) {

        case ACPI_NO_BUFFER:

                /* Set the exception and returned the required length */

                status = AE_BUFFER_OVERFLOW;

                break;

        case ACPI_ALLOCATE_BUFFER:

                /* Allocate a new buffer */

                buffer->pointer = acpi_os_allocate(required_length);

                if (!buffer->pointer) {

                        return (AE_NO_MEMORY);

                }

                /* Clear the buffer */

                ACPI_MEMSET(buffer->pointer, 0, required_length);

                break;

        case ACPI_ALLOCATE_LOCAL_BUFFER:

                /* Allocate a new buffer with local interface to allow tracking */

                buffer->pointer = ACPI_ALLOCATE_ZEROED(required_length);

                if (!buffer->pointer) {

                        return (AE_NO_MEMORY);

                }

                break;

        default:

                /* Existing buffer: Validate the size of the buffer */

                if (buffer->length < required_length) {

                        status = AE_BUFFER_OVERFLOW;

                        break;

                }

                /* Clear the buffer */

                ACPI_MEMSET(buffer->pointer, 0, required_length);

                break;

        }

        buffer->length = required_length;

        return (status);

}

#ifdef NOT_USED_BY_LINUX

/*******************************************************************************

 *

 * FUNCTION:    acpi_ut_allocate

 *

 * PARAMETERS:  Size                - Size of the allocation

 *              Component           - Component type of caller

 *              Module              - Source file name of caller

 *              Line                - Line number of caller

 *

 * RETURN:      Address of the allocated memory on success, NULL on failure.

 *

 * DESCRIPTION: Subsystem equivalent of malloc.

 *

 ******************************************************************************/

void *acpi_ut_allocate(acpi_size size, u32 component, char *module, u32 line)

{

        void *allocation;

        ACPI_FUNCTION_TRACE_U32(ut_allocate, size);

        /* Check for an inadvertent size of zero bytes */

        if (!size) {

                ACPI_WARNING((module, line,

                              "Attempt to allocate zero bytes, allocating 1 byte"));

                size = 1;

        }

        allocation = acpi_os_allocate(size);

        if (!allocation) {

                /* Report allocation error */

                ACPI_WARNING((module, line,

                              "Could not allocate size %X", (u32) size));

                return_PTR(NULL);

        }

        return_PTR(allocation);

}

/*******************************************************************************

 *

 * FUNCTION:    acpi_ut_allocate_zeroed

 *

 * PARAMETERS:  Size                - Size of the allocation

 *              Component           - Component type of caller

 *              Module              - Source file name of caller

 *              Line                - Line number of caller

 *

 * RETURN:      Address of the allocated memory on success, NULL on failure.

 *

 * DESCRIPTION: Subsystem equivalent of calloc. Allocate and zero memory.

 *

 ******************************************************************************/

void *acpi_ut_allocate_zeroed(acpi_size size,

                              u32 component, char *module, u32 line)

{

        void *allocation;

        ACPI_FUNCTION_ENTRY();

        allocation = acpi_ut_allocate(size, component, module, line);

        if (allocation) {

                /* Clear the memory block */

                ACPI_MEMSET(allocation, 0, size);

        }

        return (allocation);

}

#endif