/****************************************************************************
* netutils/thttpd/thttpd_alloc.c
*
* Copyright (C) 2009 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
*
* 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.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* 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.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <stdlib.h>
#include <debug.h>
#include <errno.h>
#include "config.h"
#include "thttpd_alloc.h"
#ifdef CONFIG_THTTPD
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
#ifndef MAX
# define MAX(a,b) ((a) > (b) ? (a) : (b))
#endif
#ifndef MIN
# define MIN(a,b) ((a) < (b) ? (a) : (b))
#endif
/****************************************************************************
* Private Data
****************************************************************************/
#ifdef CONFIG_THTTPD_MEMDEBUG
static int g_nallocations = 0;
static int g_nfreed = 0;
static size_t g_allocated = 0;
#endif
/****************************************************************************
* Private Functions
****************************************************************************/
/* Generate debugging statistics */
#ifdef CONFIG_THTTPD_MEMDEBUG
void httpd_memstats(void)
{
static struct mallinfo mm;
ndbg("%d allocations (%lu bytes), %d freed\n", g_nallocations, (unsigned long)g_allocated, g_nfreed);
/* Get the current memory usage */
#ifdef CONFIG_CAN_PASS_STRUCTS
mm = mallinfo();
#else
(void)mallinfo(&mm);
#endif
ndbg("arena: %08x ordblks: %08x mxordblk: %08x uordblks: %08x fordblks: %08x\n",
mm.arena, mm.ordblks, mm.mxordblk, mm.uordblks, mm.fordblks);
}
#endif
/****************************************************************************
* Global Functions
****************************************************************************/
#ifdef CONFIG_THTTPD_MEMDEBUG
FAR void *httpd_malloc(size_t nbytes)
{
void *ptr = malloc(nbytes);
if (!ptr)
{
ndbg("Allocation of %d bytes failed\n", nbytes);
}
else
{
nvdbg("Allocated %d bytes at %p\n", nbytes, ptr);
g_nallocations++;
g_allocated += nbytes;
}
httpd_memstats();
return ptr;
}
#endif
#ifdef CONFIG_THTTPD_MEMDEBUG
FAR void *httpd_realloc(FAR void *oldptr, size_t oldsize, size_t newsize)
{
void *ptr = realloc(oldptr, newsize);
if (!ptr)
{
ndbg("Re-allocation from %d to %d bytes failed\n",
oldsize, newsize);
}
else
{
nvdbg("Re-allocated form %d to %d bytes (from %p to %p)\n",
oldsize, newsize, oldptr, ptr);
g_allocated += (newsize - oldsize);
}
httpd_memstats();
return ptr;
}
#endif
#ifdef CONFIG_THTTPD_MEMDEBUG
void httpd_free(FAR void *ptr)
{
free(ptr);
g_nfreed++;
nvdbg("Freed memory at %p\n", ptr);
httpd_memstats();
}
#endif
#ifdef CONFIG_THTTPD_MEMDEBUG
FAR char *httpd_strdup(const char *str)
{
FAR char *newstr = strdup(str);
if (!newstr)
{
ndbg("strdup of %s failed\n", str);
}
else
{
nvdbg("strdup'ed %s\n", str);
g_nallocations++;
g_allocated += (strlen(str)+1);
}
httpd_memstats();
return newstr;
}
#endif
/* Helpers to implement dynamically allocated strings */
void httpd_realloc_str(char **pstr, size_t *maxsize, size_t size)
{
size_t oldsize;
if (*maxsize == 0)
{
*maxsize = MAX(CONFIG_THTTPD_MINSTRSIZE, size + CONFIG_THTTPD_REALLOCINCR);
*pstr = NEW(char, *maxsize + 1);
}
else if (size > *maxsize)
{
oldsize = *maxsize;
*maxsize = MAX(oldsize * 2, size * 5 / 4);
*pstr = httpd_realloc(*pstr, oldsize + 1, *maxsize + 1);
}
else
{
return;
}
if (!*pstr)
{
ndbg("out of memory reallocating a string to %d bytes\n", *maxsize);
exit(1);
}
}
#endif /* CONFIG_THTTPD */
