| /**************************************************************************** |
| * netutils/thttpd/thttpd_alloc.c |
| * |
| * Copyright (C) 2009 Gregory Nutt. All rights reserved. |
| * Author: Gregory Nutt <gnutt@nuttx.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. |
| * 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; |
| |
| ninfo("%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 |
| ninfo("arena: %08x ordblks: %08x mxordblk: %08x uordblks: %08x fordblks: %08x\n", |
| mm.arena, mm.ordblks, mm.mxordblk, mm.uordblks, mm.fordblks); |
| } |
| #endif |
| |
| /**************************************************************************** |
| * Public Functions |
| ****************************************************************************/ |
| |
| #ifdef CONFIG_THTTPD_MEMDEBUG |
| FAR void *httpd_malloc(size_t nbytes) |
| { |
| void *ptr = malloc(nbytes); |
| if (!ptr) |
| { |
| nerr("ERROR: Allocation of %d bytes failed\n", nbytes); |
| } |
| else |
| { |
| ninfo("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) |
| { |
| nerr("ERROR: Re-allocation from %d to %d bytes failed\n", |
| oldsize, newsize); |
| } |
| else |
| { |
| ninfo("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++; |
| ninfo("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) |
| { |
| nerr("ERROR: strdup of %s failed\n", str); |
| } |
| else |
| { |
| ninfo("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) |
| { |
| nerr("ERROR: out of memory reallocating a string to %d bytes\n", |
| *maxsize); |
| exit(1); |
| } |
| } |
| |
| #endif /* CONFIG_THTTPD */ |