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 /******************************************************************************
  *
  * Module Name: utalloc - local memory allocation routines
  *
  *****************************************************************************/
 
 /******************************************************************************
  *
  * 1. Copyright Notice
  *
  * Some or all of this work - Copyright (c) 1999 - 2009, Intel Corp.
  * All rights reserved.
  *
  * 2. License
  *
  * 2.1. This is your license from Intel Corp. under its intellectual property
  * rights.  You may have additional license terms from the party that provided
  * you this software, covering your right to use that party's intellectual
  * property rights.
  *
  * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
  * copy of the source code appearing in this file ("Covered Code") an
  * irrevocable, perpetual, worldwide license under Intel's copyrights in the
  * base code distributed originally by Intel ("Original Intel Code") to copy,
  * make derivatives, distribute, use and display any portion of the Covered
  * Code in any form, with the right to sublicense such rights; and
  *
  * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
  * license (with the right to sublicense), under only those claims of Intel
  * patents that are infringed by the Original Intel Code, to make, use, sell,
  * offer to sell, and import the Covered Code and derivative works thereof
  * solely to the minimum extent necessary to exercise the above copyright
  * license, and in no event shall the patent license extend to any additions
  * to or modifications of the Original Intel Code.  No other license or right
  * is granted directly or by implication, estoppel or otherwise;
  *
  * The above copyright and patent license is granted only if the following
  * conditions are met:
  *
  * 3. Conditions
  *
  * 3.1. Redistribution of Source with Rights to Further Distribute Source.
  * Redistribution of source code of any substantial portion of the Covered
  * Code or modification with rights to further distribute source must include
  * the above Copyright Notice, the above License, this list of Conditions,
  * and the following Disclaimer and Export Compliance provision.  In addition,
  * Licensee must cause all Covered Code to which Licensee contributes to
  * contain a file documenting the changes Licensee made to create that Covered
  * Code and the date of any change.  Licensee must include in that file the
  * documentation of any changes made by any predecessor Licensee.  Licensee
  * must include a prominent statement that the modification is derived,
  * directly or indirectly, from Original Intel Code.
  *
  * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
  * Redistribution of source code of any substantial portion of the Covered
  * Code or modification without rights to further distribute source must
  * include the following Disclaimer and Export Compliance provision in the
  * documentation and/or other materials provided with distribution.  In
  * addition, Licensee may not authorize further sublicense of source of any
  * portion of the Covered Code, and must include terms to the effect that the
  * license from Licensee to its licensee is limited to the intellectual
  * property embodied in the software Licensee provides to its licensee, and
  * not to intellectual property embodied in modifications its licensee may
  * make.
  *
  * 3.3. Redistribution of Executable. Redistribution in executable form of any
  * substantial portion of the Covered Code or modification must reproduce the
  * above Copyright Notice, and the following Disclaimer and Export Compliance
  * provision in the documentation and/or other materials provided with the
  * distribution.
  *
  * 3.4. Intel retains all right, title, and interest in and to the Original
  * Intel Code.
  *
  * 3.5. Neither the name Intel nor any other trademark owned or controlled by
  * Intel shall be used in advertising or otherwise to promote the sale, use or
  * other dealings in products derived from or relating to the Covered Code
  * without prior written authorization from Intel.
  *
  * 4. Disclaimer and Export Compliance
  *
  * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
  * HERE.  ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
  * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT,  ASSISTANCE,
  * INSTALLATION, TRAINING OR OTHER SERVICES.  INTEL WILL NOT PROVIDE ANY
  * UPDATES, ENHANCEMENTS OR EXTENSIONS.  INTEL SPECIFICALLY DISCLAIMS ANY
  * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
  * PARTICULAR PURPOSE.
  *
  * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
  * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
  * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
  * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
  * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
  * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.  THESE LIMITATIONS
  * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
  * LIMITED REMEDY.
  *
  * 4.3. Licensee shall not export, either directly or indirectly, any of this
  * software or system incorporating such software without first obtaining any
  * required license or other approval from the U. S. Department of Commerce or
  * any other agency or department of the United States Government.  In the
  * event Licensee exports any such software from the United States or
  * re-exports any such software from a foreign destination, Licensee shall
  * ensure that the distribution and export/re-export of the software is in
  * compliance with all laws, regulations, orders, or other restrictions of the
  * U.S. Export Administration Regulations. Licensee agrees that neither it nor
  * any of its subsidiaries will export/re-export any technical data, process,
  * software, or service, directly or indirectly, to any country for which the
  * United States government or any agency thereof requires an export license,
  * other governmental approval, or letter of assurance, without first obtaining
  * such license, approval or letter.
  *
  *****************************************************************************/
 
 #define __UTALLOC_C__
 
 #include "acpi.h"
 #include "accommon.h"
 #include "acdebug.h"
 
 #define _COMPONENT          ACPI_UTILITIES
         ACPI_MODULE_NAME    ("utalloc")
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiUtCreateCaches
  *
  * PARAMETERS:  None
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Create all local caches
  *
  ******************************************************************************/
 
 ACPI_STATUS
 AcpiUtCreateCaches (
     void)
 {
     ACPI_STATUS             Status;
 
 
     /* Object Caches, for frequently used objects */
 
     Status = AcpiOsCreateCache ("Acpi-Namespace", sizeof (ACPI_NAMESPACE_NODE),
                 ACPI_MAX_NAMESPACE_CACHE_DEPTH, &AcpiGbl_NamespaceCache);
     if (ACPI_FAILURE (Status))
     {
         return (Status);
     }
 
     Status = AcpiOsCreateCache ("Acpi-State", sizeof (ACPI_GENERIC_STATE),
                 ACPI_MAX_STATE_CACHE_DEPTH, &AcpiGbl_StateCache);
     if (ACPI_FAILURE (Status))
     {
         return (Status);
     }
 
     Status = AcpiOsCreateCache ("Acpi-Parse", sizeof (ACPI_PARSE_OBJ_COMMON),
                 ACPI_MAX_PARSE_CACHE_DEPTH, &AcpiGbl_PsNodeCache);
     if (ACPI_FAILURE (Status))
     {
         return (Status);
     }
 
     Status = AcpiOsCreateCache ("Acpi-ParseExt", sizeof (ACPI_PARSE_OBJ_NAMED),
                 ACPI_MAX_EXTPARSE_CACHE_DEPTH, &AcpiGbl_PsNodeExtCache);
     if (ACPI_FAILURE (Status))
     {
         return (Status);
     }
 
     Status = AcpiOsCreateCache ("Acpi-Operand", sizeof (ACPI_OPERAND_OBJECT),
                 ACPI_MAX_OBJECT_CACHE_DEPTH, &AcpiGbl_OperandCache);
     if (ACPI_FAILURE (Status))
     {
         return (Status);
     }
 
 
 #ifdef ACPI_DBG_TRACK_ALLOCATIONS
 
     /* Memory allocation lists */
 
     Status = AcpiUtCreateList ("Acpi-Global", 0,
                 &AcpiGbl_GlobalList);
     if (ACPI_FAILURE (Status))
     {
         return (Status);
     }
 
     Status = AcpiUtCreateList ("Acpi-Namespace", sizeof (ACPI_NAMESPACE_NODE),
                 &AcpiGbl_NsNodeList);
     if (ACPI_FAILURE (Status))
     {
         return (Status);
     }
 #endif
 
     return (AE_OK);
 }
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiUtDeleteCaches
  *
  * PARAMETERS:  None
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Purge and delete all local caches
  *
  ******************************************************************************/
 
 ACPI_STATUS
 AcpiUtDeleteCaches (
     void)
 {
 #ifdef ACPI_DBG_TRACK_ALLOCATIONS
     char                    Buffer[7];
 
     if (AcpiGbl_DisplayFinalMemStats)
     {
         ACPI_STRCPY (Buffer, "MEMORY");
         (void) AcpiDbDisplayStatistics (Buffer);
     }
 #endif
 
     (void) AcpiOsDeleteCache (AcpiGbl_NamespaceCache);
     AcpiGbl_NamespaceCache = NULL;
 
     (void) AcpiOsDeleteCache (AcpiGbl_StateCache);
     AcpiGbl_StateCache = NULL;
 
     (void) AcpiOsDeleteCache (AcpiGbl_OperandCache);
     AcpiGbl_OperandCache = NULL;
 
     (void) AcpiOsDeleteCache (AcpiGbl_PsNodeCache);
     AcpiGbl_PsNodeCache = NULL;
 
     (void) AcpiOsDeleteCache (AcpiGbl_PsNodeExtCache);
     AcpiGbl_PsNodeExtCache = NULL;
 
 
 #ifdef ACPI_DBG_TRACK_ALLOCATIONS
 
     /* Debug only - display leftover memory allocation, if any */
 
     AcpiUtDumpAllocations (ACPI_UINT32_MAX, NULL);
 
     /* Free memory lists */
 
     AcpiOsFree (AcpiGbl_GlobalList);
     AcpiGbl_GlobalList = NULL;
 
     AcpiOsFree (AcpiGbl_NsNodeList);
     AcpiGbl_NsNodeList = NULL;
 #endif
 
     return (AE_OK);
 }
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiUtValidateBuffer
  *
  * PARAMETERS:  Buffer              - Buffer descriptor to be validated
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Perform parameter validation checks on an ACPI_BUFFER
  *
  ******************************************************************************/
 
 ACPI_STATUS
 AcpiUtValidateBuffer (
     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:    AcpiUtInitializeBuffer
  *
  * PARAMETERS:  Buffer              - Buffer to be validated
  *              RequiredLength      - 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
 AcpiUtInitializeBuffer (
     ACPI_BUFFER             *Buffer,
     ACPI_SIZE               RequiredLength)
 {
     ACPI_SIZE               InputBufferLength;
 
 
     /* Parameter validation */
 
     if (!Buffer || !RequiredLength)
     {
         return (AE_BAD_PARAMETER);
     }
 
     /*
      * Buffer->Length is used as both an input and output parameter. Get the
      * input actual length and set the output required buffer length.
      */
     InputBufferLength = Buffer->Length;
     Buffer->Length = RequiredLength;
 
     /*
      * The input buffer length contains the actual buffer length, or the type
      * of buffer to be allocated by this routine.
      */
     switch (InputBufferLength)
     {
     case ACPI_NO_BUFFER:
 
         /* Return the exception (and the required buffer length) */
 
         return (AE_BUFFER_OVERFLOW);
 
     case ACPI_ALLOCATE_BUFFER:
 
         /* Allocate a new buffer */
 
         Buffer->Pointer = AcpiOsAllocate (RequiredLength);
         break;
 
     case ACPI_ALLOCATE_LOCAL_BUFFER:
 
         /* Allocate a new buffer with local interface to allow tracking */
 
         Buffer->Pointer = ACPI_ALLOCATE (RequiredLength);
         break;
 
     default:
 
         /* Existing buffer: Validate the size of the buffer */
 
         if (InputBufferLength < RequiredLength)
         {
             return (AE_BUFFER_OVERFLOW);
         }
         break;
     }
 
     /* Validate allocation from above or input buffer pointer */
 
     if (!Buffer->Pointer)
     {
         return (AE_NO_MEMORY);
     }
 
     /* Have a valid buffer, clear it */
 
     ACPI_MEMSET (Buffer->Pointer, 0, RequiredLength);
     return (AE_OK);
 }
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiUtAllocate
  *
  * 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 *
 AcpiUtAllocate (
     ACPI_SIZE               Size,
     UINT32                  Component,
     const char              *Module,
     UINT32                  Line)
 {
     void                    *Allocation;
 
 
     ACPI_FUNCTION_TRACE_U32 (UtAllocate, 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 = AcpiOsAllocate (Size);
     if (!Allocation)
     {
         /* Report allocation error */
 
         ACPI_WARNING ((Module, Line,
             "Could not allocate size %X", (UINT32) Size));
 
         return_PTR (NULL);
     }
 
     return_PTR (Allocation);
 }
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiUtAllocateZeroed
  *
  * 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 *
 AcpiUtAllocateZeroed (
     ACPI_SIZE               Size,
     UINT32                  Component,
     const char              *Module,
     UINT32                  Line)
 {
     void                    *Allocation;
 
 
     ACPI_FUNCTION_ENTRY ();
 
 
     Allocation = AcpiUtAllocate (Size, Component, Module, Line);
     if (Allocation)
     {
         /* Clear the memory block */
 
         ACPI_MEMSET (Allocation, 0, Size);
     }
 
     return (Allocation);
 }