| 0,0 → 1,433 |
|---|
| /****************************************************************************** |
| * |
| * Module Name: utcache - local cache allocation routines |
| * |
| *****************************************************************************/ |
| |
| /****************************************************************************** |
| * |
| * 1. Copyright Notice |
| * |
| * Some or all of this work - Copyright (c) 1999 - 2010, 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 __UTCACHE_C__ |
| |
| #include "acpi.h" |
| #include "accommon.h" |
| |
| #define _COMPONENT ACPI_UTILITIES |
| ACPI_MODULE_NAME ("utcache") |
| |
| |
| #ifdef ACPI_USE_LOCAL_CACHE |
| /******************************************************************************* |
| * |
| * FUNCTION: AcpiOsCreateCache |
| * |
| * PARAMETERS: CacheName - Ascii name for the cache |
| * ObjectSize - Size of each cached object |
| * MaxDepth - Maximum depth of the cache (in objects) |
| * ReturnCache - Where the new cache object is returned |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: Create a cache object |
| * |
| ******************************************************************************/ |
| |
| ACPI_STATUS |
| AcpiOsCreateCache ( |
| char *CacheName, |
| UINT16 ObjectSize, |
| UINT16 MaxDepth, |
| ACPI_MEMORY_LIST **ReturnCache) |
| { |
| ACPI_MEMORY_LIST *Cache; |
| |
| |
| ACPI_FUNCTION_ENTRY (); |
| |
| |
| if (!CacheName || !ReturnCache || (ObjectSize < 16)) |
| { |
| return (AE_BAD_PARAMETER); |
| } |
| |
| /* Create the cache object */ |
| |
| Cache = AcpiOsAllocate (sizeof (ACPI_MEMORY_LIST)); |
| if (!Cache) |
| { |
| return (AE_NO_MEMORY); |
| } |
| |
| /* Populate the cache object and return it */ |
| |
| ACPI_MEMSET (Cache, 0, sizeof (ACPI_MEMORY_LIST)); |
| Cache->LinkOffset = 8; |
| Cache->ListName = CacheName; |
| Cache->ObjectSize = ObjectSize; |
| Cache->MaxDepth = MaxDepth; |
| |
| *ReturnCache = Cache; |
| return (AE_OK); |
| } |
| |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: AcpiOsPurgeCache |
| * |
| * PARAMETERS: Cache - Handle to cache object |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: Free all objects within the requested cache. |
| * |
| ******************************************************************************/ |
| |
| ACPI_STATUS |
| AcpiOsPurgeCache ( |
| ACPI_MEMORY_LIST *Cache) |
| { |
| char *Next; |
| ACPI_STATUS Status; |
| |
| |
| ACPI_FUNCTION_ENTRY (); |
| |
| |
| if (!Cache) |
| { |
| return (AE_BAD_PARAMETER); |
| } |
| |
| Status = AcpiUtAcquireMutex (ACPI_MTX_CACHES); |
| if (ACPI_FAILURE (Status)) |
| { |
| return (Status); |
| } |
| |
| /* Walk the list of objects in this cache */ |
| |
| while (Cache->ListHead) |
| { |
| /* Delete and unlink one cached state object */ |
| |
| Next = *(ACPI_CAST_INDIRECT_PTR (char, |
| &(((char *) Cache->ListHead)[Cache->LinkOffset]))); |
| ACPI_FREE (Cache->ListHead); |
| |
| Cache->ListHead = Next; |
| Cache->CurrentDepth--; |
| } |
| |
| (void) AcpiUtReleaseMutex (ACPI_MTX_CACHES); |
| return (AE_OK); |
| } |
| |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: AcpiOsDeleteCache |
| * |
| * PARAMETERS: Cache - Handle to cache object |
| * |
| * RETURN: Status |
| * |
| * DESCRIPTION: Free all objects within the requested cache and delete the |
| * cache object. |
| * |
| ******************************************************************************/ |
| |
| ACPI_STATUS |
| AcpiOsDeleteCache ( |
| ACPI_MEMORY_LIST *Cache) |
| { |
| ACPI_STATUS Status; |
| |
| |
| ACPI_FUNCTION_ENTRY (); |
| |
| |
| /* Purge all objects in the cache */ |
| |
| Status = AcpiOsPurgeCache (Cache); |
| if (ACPI_FAILURE (Status)) |
| { |
| return (Status); |
| } |
| |
| /* Now we can delete the cache object */ |
| |
| AcpiOsFree (Cache); |
| return (AE_OK); |
| } |
| |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: AcpiOsReleaseObject |
| * |
| * PARAMETERS: Cache - Handle to cache object |
| * Object - The object to be released |
| * |
| * RETURN: None |
| * |
| * DESCRIPTION: Release an object to the specified cache. If cache is full, |
| * the object is deleted. |
| * |
| ******************************************************************************/ |
| |
| ACPI_STATUS |
| AcpiOsReleaseObject ( |
| ACPI_MEMORY_LIST *Cache, |
| void *Object) |
| { |
| ACPI_STATUS Status; |
| |
| |
| ACPI_FUNCTION_ENTRY (); |
| |
| |
| if (!Cache || !Object) |
| { |
| return (AE_BAD_PARAMETER); |
| } |
| |
| /* If cache is full, just free this object */ |
| |
| if (Cache->CurrentDepth >= Cache->MaxDepth) |
| { |
| ACPI_FREE (Object); |
| ACPI_MEM_TRACKING (Cache->TotalFreed++); |
| } |
| |
| /* Otherwise put this object back into the cache */ |
| |
| else |
| { |
| Status = AcpiUtAcquireMutex (ACPI_MTX_CACHES); |
| if (ACPI_FAILURE (Status)) |
| { |
| return (Status); |
| } |
| |
| /* Mark the object as cached */ |
| |
| ACPI_MEMSET (Object, 0xCA, Cache->ObjectSize); |
| ACPI_SET_DESCRIPTOR_TYPE (Object, ACPI_DESC_TYPE_CACHED); |
| |
| /* Put the object at the head of the cache list */ |
| |
| * (ACPI_CAST_INDIRECT_PTR (char, |
| &(((char *) Object)[Cache->LinkOffset]))) = Cache->ListHead; |
| Cache->ListHead = Object; |
| Cache->CurrentDepth++; |
| |
| (void) AcpiUtReleaseMutex (ACPI_MTX_CACHES); |
| } |
| |
| return (AE_OK); |
| } |
| |
| |
| /******************************************************************************* |
| * |
| * FUNCTION: AcpiOsAcquireObject |
| * |
| * PARAMETERS: Cache - Handle to cache object |
| * |
| * RETURN: the acquired object. NULL on error |
| * |
| * DESCRIPTION: Get an object from the specified cache. If cache is empty, |
| * the object is allocated. |
| * |
| ******************************************************************************/ |
| |
| void * |
| AcpiOsAcquireObject ( |
| ACPI_MEMORY_LIST *Cache) |
| { |
| ACPI_STATUS Status; |
| void *Object; |
| |
| |
| ACPI_FUNCTION_NAME (OsAcquireObject); |
| |
| |
| if (!Cache) |
| { |
| return (NULL); |
| } |
| |
| Status = AcpiUtAcquireMutex (ACPI_MTX_CACHES); |
| if (ACPI_FAILURE (Status)) |
| { |
| return (NULL); |
| } |
| |
| ACPI_MEM_TRACKING (Cache->Requests++); |
| |
| /* Check the cache first */ |
| |
| if (Cache->ListHead) |
| { |
| /* There is an object available, use it */ |
| |
| Object = Cache->ListHead; |
| Cache->ListHead = *(ACPI_CAST_INDIRECT_PTR (char, |
| &(((char *) Object)[Cache->LinkOffset]))); |
| |
| Cache->CurrentDepth--; |
| |
| ACPI_MEM_TRACKING (Cache->Hits++); |
| ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, |
| "Object %p from %s cache\n", Object, Cache->ListName)); |
| |
| Status = AcpiUtReleaseMutex (ACPI_MTX_CACHES); |
| if (ACPI_FAILURE (Status)) |
| { |
| return (NULL); |
| } |
| |
| /* Clear (zero) the previously used Object */ |
| |
| ACPI_MEMSET (Object, 0, Cache->ObjectSize); |
| } |
| else |
| { |
| /* The cache is empty, create a new object */ |
| |
| ACPI_MEM_TRACKING (Cache->TotalAllocated++); |
| |
| #ifdef ACPI_DBG_TRACK_ALLOCATIONS |
| if ((Cache->TotalAllocated - Cache->TotalFreed) > Cache->MaxOccupied) |
| { |
| Cache->MaxOccupied = Cache->TotalAllocated - Cache->TotalFreed; |
| } |
| #endif |
| |
| /* Avoid deadlock with ACPI_ALLOCATE_ZEROED */ |
| |
| Status = AcpiUtReleaseMutex (ACPI_MTX_CACHES); |
| if (ACPI_FAILURE (Status)) |
| { |
| return (NULL); |
| } |
| |
| Object = ACPI_ALLOCATE_ZEROED (Cache->ObjectSize); |
| if (!Object) |
| { |
| return (NULL); |
| } |
| } |
| |
| return (Object); |
| } |
| #endif /* ACPI_USE_LOCAL_CACHE */ |
| |
| |