ref: a7ec22a8ea9f6480ae3e7e15710c991f80f79dcd
dir: /src/utils/cst_alloc.c/
/*************************************************************************/
/* */
/* Language Technologies Institute */
/* Carnegie Mellon University */
/* Copyright (c) 1999 */
/* All Rights Reserved. */
/* */
/* Permission is hereby granted, free of charge, to use and distribute */
/* this software and its documentation without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of this work, and to */
/* permit persons to whom this work is furnished to do so, subject to */
/* the following conditions: */
/* 1. The code must retain the above copyright notice, this list of */
/* conditions and the following disclaimer. */
/* 2. Any modifications must be clearly marked as such. */
/* 3. Original authors' names are not deleted. */
/* 4. The authors' names are not used to endorse or promote products */
/* derived from this software without specific prior written */
/* permission. */
/* */
/* CARNEGIE MELLON UNIVERSITY AND THE CONTRIBUTORS TO THIS WORK */
/* DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING */
/* ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT */
/* SHALL CARNEGIE MELLON UNIVERSITY NOR THE CONTRIBUTORS BE LIABLE */
/* FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES */
/* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN */
/* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, */
/* ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF */
/* THIS SOFTWARE. */
/* */
/*************************************************************************/
/* Author: Alan W Black (awb@cs.cmu.edu) */
/* Date: July 1999 */
/*************************************************************************/
/* */
/* Basic wraparounds for malloc and free */
/* */
/*************************************************************************/
#include "cst_file.h"
#include "cst_alloc.h"
#include "cst_error.h"
#ifdef UNDER_CE
#include <windows.h>
#endif /* UNDER_CE */
/* define this if you want to trace memory usage */
/* #define CST_DEBUG_MALLOC */
/* #define CST_DEBUG_MALLOC_TRACE */
#ifdef CST_DEBUG_MALLOC
int cst_allocated = 0;
int cst_freed = 0;
int cst_alloc_max = 0;
int cst_alloc_imax = 0;
int cst_alloc_num_calls = 0;
int cst_alloc_out = 0;
#ifdef CST_DEBUG_MALLOC_TRACE
/* This is a crude memory tracer to find leaks */
int cst_alloc_ckpt = -1;
/* You have to know how big this should be to use it, its for debuging only */
#define NUM_CHUNKS 10000000
void *cst_alloc_cunks[NUM_CHUNKS];
#endif
#endif
void *cst_safe_alloc(int size)
{
/* returns pointer to memory all set 0 */
void *p = NULL;
if (size < 0)
{
cst_errmsg("alloc: asked for negative size %d\n", size);
cst_error();
}
else if (size == 0) /* some mallocs return NULL for this */
size++;
#ifdef CST_DEBUG_MALLOC
if (size > cst_alloc_imax)
{
cst_alloc_imax = size;
}
cst_allocated += size;
cst_alloc_out += size;
size += 2 * sizeof(int);
#endif
#ifdef UNDER_CE
p = (void *)LocalAlloc(LPTR, size);
#else
p = (void *)calloc(size,1);
#endif
#ifdef CST_DEBUG_MALLOC
#ifdef CST_DEBUG_MALLOC_TRACE
if (cst_alloc_num_calls == cst_alloc_ckpt)
cst_dbgmsg("cst_malloc: %d\n", cst_alloc_ckpt);
cst_alloc_cunks[cst_alloc_num_calls] = p;
#endif
cst_alloc_num_calls++;
*(int *)p = 1314;
p = (int *)p + 1;
*(int *)p = size - (2 * sizeof(int));
if ((cst_allocated - cst_freed) > cst_alloc_max)
cst_alloc_max = cst_allocated - cst_freed;
p = (int *)p + 1;
#endif
if (p == NULL)
{
cst_errmsg("alloc: can't alloc %d bytes\n", size);
cst_error();
}
return p;
}
void *cst_safe_calloc(int size)
{
return cst_safe_alloc(size);
}
void *cst_safe_realloc(void *p,int size)
{
void *np=0;
#ifdef CST_DEBUG_MALLOC
cst_free(p);
return cst_safe_alloc(size);
#endif
if (size == 0)
size++; /* as some mallocs do strange things with 0 */
if (p == NULL)
np = cst_safe_alloc(size);
else
#ifdef UNDER_CE
np = LocalReAlloc((HLOCAL)p, size, LMEM_MOVEABLE|LMEM_ZEROINIT);
#else
np = realloc(p,size);
#endif
if (np == NULL)
{
cst_errmsg("CST_REALLOC failed for %d bytes\n",size);
cst_error();
}
return np;
}
void cst_free(void *p)
{
if (p != NULL)
{
#ifdef CST_DEBUG_MALLOC
if (*((int *)p - 2) != 1314)
{
cst_dbgmsg("CST_MALLOC_DEBUG freeing non-malloc memory\n");
return;
}
if (*((int *)p - 1) <= 0)
{
cst_dbgmsg("CST_MALLOC_DEBUG re-freeing memory\n");
return;
}
cst_freed += *((int *)p - 1);
cst_alloc_out -= *((int *)p - 1);
*((int *)p - 1) = 0; /* mark it as freed */
p = (int *)p - 2;
#endif
#ifndef CST_DEBUG_MALLOC_TRACE
#ifdef UNDER_CE
if (LocalFree(p) != NULL)
{
cst_errmsg("LocalFree(%p) failed with code %x\n",
p, GetLastError());
cst_error();
}
#else
free(p);
#endif
#endif
}
}
#ifdef CST_DEBUG_MALLOC_TRACE
void cst_find_unfreed()
{
int i, t;
for (i = 0, t = 0;
i < NUM_CHUNKS
&& i < cst_alloc_num_calls
&& cst_alloc_cunks[i];
i++)
{
if (((int *)cst_alloc_cunks[i])[1] != 0)
{
cst_dbgmsg("unfreed at %d\n", i);
t++;
}
}
cst_dbgmsg("total unfreed %d\n", t);
}
void cst_alloc_debug_summary()
{
cst_find_unfreed();
printf("allocated %d freed %d max %d imax %d calls %d out %d\n",
cst_allocated, cst_freed, cst_alloc_max,
cst_alloc_imax, cst_alloc_num_calls, cst_alloc_out);
}
#endif
#ifdef UNDER_CE
cst_alloc_context new_alloc_context(int size)
{
HANDLE h;
h = HeapCreate(0, size, 0);
return (cst_alloc_context) h;
}
void delete_alloc_context(cst_alloc_context ctx)
{
HANDLE h;
h = (HANDLE)ctx;
HeapDestroy(h);
}
void *cst_local_alloc(cst_alloc_context ctx, int size)
{
HANDLE h;
h = (HANDLE)ctx;
if (h)
return HeapAlloc(h, HEAP_ZERO_MEMORY, size);
else
return LocalAlloc(LPTR, size);
}
void cst_local_free(cst_alloc_context ctx, void *p)
{
HANDLE h;
h = (HANDLE)ctx;
if (h)
HeapFree(h, 0, p);
else
LocalFree(p);
}
#endif