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author | jkim <jkim@FreeBSD.org> | 2012-02-16 22:59:29 +0000 |
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committer | jkim <jkim@FreeBSD.org> | 2012-02-16 22:59:29 +0000 |
commit | a561c762bacb78b14d2bf5fb20afc1566203f990 (patch) | |
tree | d4ae2db1980d2ec7b164b1a5658fd2ae62569456 /sys/contrib/dev/acpica/components/utilities/utcache.c | |
parent | 2b86faa18cb89921d202e133fa6a1c39b63cfe16 (diff) | |
parent | a6dfe3119152f97e640cc135d963b9f7c95c84ef (diff) | |
download | FreeBSD-src-a561c762bacb78b14d2bf5fb20afc1566203f990.zip FreeBSD-src-a561c762bacb78b14d2bf5fb20afc1566203f990.tar.gz |
Merge ACPICA 20120215.
Diffstat (limited to 'sys/contrib/dev/acpica/components/utilities/utcache.c')
-rw-r--r-- | sys/contrib/dev/acpica/components/utilities/utcache.c | 361 |
1 files changed, 361 insertions, 0 deletions
diff --git a/sys/contrib/dev/acpica/components/utilities/utcache.c b/sys/contrib/dev/acpica/components/utilities/utcache.c new file mode 100644 index 0000000..b8efa68 --- /dev/null +++ b/sys/contrib/dev/acpica/components/utilities/utcache.c @@ -0,0 +1,361 @@ +/****************************************************************************** + * + * Module Name: utcache - local cache allocation routines + * + *****************************************************************************/ + +/* + * Copyright (C) 2000 - 2012, Intel Corp. + * 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. + */ + +#define __UTCACHE_C__ + +#include <contrib/dev/acpica/include/acpi.h> +#include <contrib/dev/acpica/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 */ + + |