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Documented (slightly) the USE_CACHE_ALIGNED define, for the standalone 

distribution
This commit is contained in:
Jack Jansen 1997-05-29 14:57:45 +00:00
parent e66b8c8543
commit 8d1ac0225c
2 changed files with 13 additions and 2 deletions
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8
Mac/mwerks/malloc/README
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@ -6,7 +6,7 @@ implemented for use with the MetroWerks CodeWarrior compiler on the
PowerPC Mac, but may also be useful (in a more limited way) for use PowerPC Mac, but may also be useful (in a more limited way) for use
with MW 68K or Think compilers. with MW 68K or Think compilers.
This is distribution 1.0, dated April 19, 1995. This is distribution 1.1, dated May 28, 1997.
How does it work? How does it work?
----------------- -----------------
@ -52,9 +52,13 @@ One reason for not using it:
How do I use it? How do I use it?
---------------- ----------------
You may want to look at the source: most debugging options are off by
default, and so is returning cache-aligned blocks. Near the top of
malloc.c you will see a couple of defines you can turn on.
For MW PPC: simply add the sources to your project. Due to the way the For MW PPC: simply add the sources to your project. Due to the way the
linker works all mallocs will use the new malloc, even the malloc linker works all mallocs will use the new malloc, even the malloc
calls that come from the libraries (if I'm informaed correctly). calls that come from the libraries.
For MW 68K: ditto, only supposedly the library malloc calls will still For MW 68K: ditto, only supposedly the library malloc calls will still
use the original malloc. The two packages don't bite each other, use the original malloc. The two packages don't bite each other,

7
Mac/mwerks/malloc/malloc.c
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@ -61,6 +61,13 @@ static char *rcsid = "$Id$";
#define VCHECK #define VCHECK
#endif /* USE_MALLOC_DEBUG */ #endif /* USE_MALLOC_DEBUG */
/*
* Set the next define if you want to return memory that is aligned to 32-byte
* boundaries. This allows 604 (and, to a lesser extent, any PPC) programs to
* make better use of the L1 cache.
*/
/* #define USE_CACHE_ALIGNED 8 /* The alignment (in 4-byte words) */
typedef unsigned char u_char; typedef unsigned char u_char;
typedef unsigned long u_long; typedef unsigned long u_long;
typedef unsigned int u_int; typedef unsigned int u_int;