| 5 |
|
#endif |
| 6 |
|
|
| 7 |
|
/* |
| 8 |
< |
* Simple memory allocation without overhead |
| 8 |
> |
* Basic memory allocation w/o overhead. |
| 9 |
> |
* Calls malloc(3) for big requests. |
| 10 |
|
* |
| 11 |
|
*/ |
| 12 |
|
|
| 13 |
+ |
#define NULL 0 |
| 14 |
+ |
|
| 15 |
|
#ifndef MBLKSIZ |
| 16 |
|
#define MBLKSIZ 16376 /* size of memory allocation block */ |
| 17 |
|
#endif |
| 18 |
+ |
#define WASTEFRAC 4 /* don't waste more than this */ |
| 19 |
|
#ifndef ALIGN |
| 20 |
|
#define ALIGN int /* type for alignment */ |
| 21 |
|
#endif |
| 26 |
|
bmalloc(n) /* allocate a block of n bytes, no refunds */ |
| 27 |
|
register unsigned n; |
| 28 |
|
{ |
| 29 |
+ |
extern char *malloc(); |
| 30 |
|
static char *bpos = NULL; |
| 31 |
|
static unsigned nrem = 0; |
| 32 |
|
|
| 33 |
< |
if (n > MBLKSIZ/2) /* too big for me */ |
| 34 |
< |
return(malloc(n)); |
| 33 |
> |
if (n > nrem && (n > MBLKSIZ || nrem > MBLKSIZ/WASTEFRAC)) |
| 34 |
> |
return(malloc(n)); /* too big */ |
| 35 |
|
|
| 36 |
|
n = (n+(BYTES_WORD-1))&~(BYTES_WORD-1); /* word align */ |
| 37 |
|
|
