Hi!
13-Мар-2004 12:40 [EMAIL PROTECTED] (Luchezar Georgiev) wrote to FreeDOS-kernel
<[EMAIL PROTECTED]>:
LG> symptom for all memory managers, even Tom's tiny but great in value
LG> TALLOC.C! These days, another colleague of mine found a bug in it causing
LG> the dreaded memory leakage when repeatedly freeing and allocating a block.
LG> The bug was in malloc() and the second patch below fixes it. I've uploaded
LG> +++ src/kernel/sys/talloc.c2004-03-12 15:54:14.000000000 +0200
For SYS (and any other program, where heap isn't [active] used) I
develop much more compact and simpler edition:
______________O\_/_________________________________\_/O______________
/* Replace: malloc() and free().
Description: simplified memory management over static buffer without
releasing of allocated memory. MALLOC_BUF_SIZE defines
size of static buffer (default value is 8k).
*/
#include <malloc.h>
#ifndef MALLOC_BUF_SIZE
# define MALLOC_BUF_SIZE (8u*1024u)
#endif
void *malloc (size_t sz) {
static char malloc_buffer [MALLOC_BUF_SIZE];
static size_t malloc_next = 0;
size_t old = malloc_next;
if (sizeof malloc_buffer - old < sz)
return NULL;
malloc_next += sz;
return malloc_buffer + old;
}
#ifdef __WATCOMC__
void *_nmalloc (size_t sz) { return malloc (sz); }
void *realloc (void *p, size_t sz) { (void)p; (void)sz; return NULL; }
#endif
#ifdef __cplusplus
void free (void*) {}
#else
void free () {}
#endif
_____________________________________________________________________
O/~\ /~\O
Place this into MALLOC.INC, and then use at the program end:
______________O\_/_________________________________\_/O______________
#ifdef __WATCOMC__
# include "malloc.inc"
#endif
_____________________________________________________________________
O/~\ /~\O
This is excerpt from BOOTFIX - because it itself doesn't uses heap, and for
BC startup streams maked nonbuffered, so malloc() stub in BOOTFIX is need
only for OW.
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