111 lines
3.3 KiB
C
111 lines
3.3 KiB
C
/****************************************************************************
|
|
* libs/libc/modlib/modlib_iobuffer.c
|
|
*
|
|
* Licensed to the Apache Software Foundation (ASF) under one or more
|
|
* contributor license agreements. See the NOTICE file distributed with
|
|
* this work for additional information regarding copyright ownership. The
|
|
* ASF licenses this file to you under the Apache License, Version 2.0 (the
|
|
* "License"); you may not use this file except in compliance with the
|
|
* License. You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
* License for the specific language governing permissions and limitations
|
|
* under the License.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include <debug.h>
|
|
#include <errno.h>
|
|
|
|
#include <nuttx/lib/modlib.h>
|
|
|
|
#include "libc.h"
|
|
#include "modlib/modlib.h"
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: modlib_allocbuffer
|
|
*
|
|
* Description:
|
|
* Perform the initial allocation of the I/O buffer, if it has not already
|
|
* been allocated.
|
|
*
|
|
* Returned Value:
|
|
* 0 (OK) is returned on success and a negated errno is returned on
|
|
* failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int modlib_allocbuffer(FAR struct mod_loadinfo_s *loadinfo)
|
|
{
|
|
/* Has a buffer been allocated> */
|
|
|
|
if (!loadinfo->iobuffer)
|
|
{
|
|
/* No.. allocate one now */
|
|
|
|
loadinfo->iobuffer = (FAR uint8_t *)
|
|
lib_malloc(CONFIG_MODLIB_BUFFERSIZE);
|
|
if (!loadinfo->iobuffer)
|
|
{
|
|
berr("ERROR: Failed to allocate an I/O buffer\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
loadinfo->buflen = CONFIG_MODLIB_BUFFERSIZE;
|
|
}
|
|
|
|
return OK;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: modlib_reallocbuffer
|
|
*
|
|
* Description:
|
|
* Increase the size of I/O buffer by the specified buffer increment.
|
|
*
|
|
* Returned Value:
|
|
* 0 (OK) is returned on success and a negated errno is returned on
|
|
* failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int modlib_reallocbuffer(FAR struct mod_loadinfo_s *loadinfo,
|
|
size_t increment)
|
|
{
|
|
FAR void *buffer;
|
|
size_t newsize;
|
|
|
|
/* Get the new size of the allocation */
|
|
|
|
newsize = loadinfo->buflen + increment;
|
|
|
|
/* And perform the reallocation */
|
|
|
|
buffer = lib_realloc(loadinfo->iobuffer, newsize);
|
|
if (!buffer)
|
|
{
|
|
berr("ERROR: Failed to reallocate the I/O buffer\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
/* Save the new buffer info */
|
|
|
|
loadinfo->iobuffer = buffer;
|
|
loadinfo->buflen = newsize;
|
|
return OK;
|
|
}
|