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/*-
* Copyright (C) 2001-2003 by NBMK Encryption Technologies.
* All rights reserved.
*
* NBMK Encryption Technologies provides no support of any kind for
* this software. Questions or concerns about it may be addressed to
* the members of the relevant open-source community at
* <tech-crypto@netbsd.org>.
*
* 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.
*
* 2. Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* 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 MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* 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 DAMAGE.
*/
static char const n8_id[] = "$Id: n8_buffer.c,v 1.1 2008/10/30 12:02:14 darran Exp $";
/*****************************************************************************/
/** @file n8_buffer.c
* @briefs file contains the N8_BufferAllocate and N8_BufferFree API calls.
*
*
*****************************************************************************/
/*****************************************************************************
* Revision history:
* 03/29/02 hml Use new style KMALLOC and deleted a user space include file.
* 02/12/02 hml First functioning version. Added calls to N8_preamble.
* 02/06/02 hml Original version.
****************************************************************************/
/** @defgroup Buffer
*/
#include "n8_malloc_common.h"
#include "n8_util.h"
#include "n8_pub_buffer.h"
#include "n8_pub_errors.h"
#include "n8_pub_common.h"
#include "n8_API_Initialize.h"
/*****************************************************************************
* N8_BufferAllocate
*****************************************************************************/
/** @ingroup Buffer
* @brief Allocates a buffer of contiguous kernel memory of the requested
* size.
*
* @param bufferHandle_p WO: Pointer to return area for handle.
* @param virtualAddress_pp WO: Pointer to return area for virtual address.
* @param nBytes RO: Number of bytes in desired buffer.
*
* @return
* returns N8_STATUS_OK if successful or Error value.
* @par Errors
* N8_INVALID_OBJECT One of the parameters is invalid.
* @par Assumptions
* None<br>
*****************************************************************************/
N8_Status_t N8_BufferAllocate(N8_BufferHandle_t *bufferHandle_p,
N8_Buffer_t **virtualAddress_pp,
const unsigned int nBytes)
{
N8_Status_t ret = N8_STATUS_OK;
N8_MemoryHandle_t *kmem_p = NULL;
do
{
ret = N8_preamble();
CHECK_RETURN(ret);
/* Parameter checking */
CHECK_OBJECT(bufferHandle_p, ret);
CHECK_OBJECT(virtualAddress_pp, ret);
if (nBytes == 0)
{
/* This is ok, but there is nothing to do */
break;
}
/* Allocate the buffer */
kmem_p = N8_KMALLOC(nBytes);
CHECK_OBJECT(kmem_p, ret);
/* Return the data to the user */
*bufferHandle_p = (N8_BufferHandle_t) kmem_p;
*virtualAddress_pp = (N8_Buffer_t *) kmem_p->VirtualAddress;
} while (FALSE);
return ret;
}
/*****************************************************************************
* N8_BufferFree
*****************************************************************************/
/** @ingroup Buffer
* @brief Frees a previously allocated buffer of contiguous kernel memory.
*
* @param bufferHandle RO: Handle of buffer to free.
*
* @return
* returns N8_STATUS_OK if successful or Error value.
* @par Errors
* N8_INVALID_OBJECT One of the parameters is invalid.
* @par Assumptions
* None<br>
*****************************************************************************/
N8_Status_t N8_BufferFree(N8_BufferHandle_t bufferHandle)
{
N8_Status_t ret = N8_STATUS_OK;
do
{
ret = N8_preamble();
CHECK_RETURN(ret);
/* Parameter checking */
CHECK_OBJECT(bufferHandle, ret);
/* Free the buffer */
N8_KFREE((N8_MemoryHandle_t *) bufferHandle);
} while (FALSE);
return ret;
}
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