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| author | Guido van Rossum <guido@python.org> | 1997-07-10 22:40:54 (GMT) |
|---|---|---|
| committer | Guido van Rossum <guido@python.org> | 1997-07-10 22:40:54 (GMT) |
| commit | 4b11c74f7c26038f94565a5b73d102bd96cc0e9f (patch) | |
| tree | ccf203ec1a68c0146af2b3543fe945cc4fb01d1d /Include/mymalloc.h | |
| parent | 5ca1b711b5dfe3de292330130987e06f65612cb9 (diff) | |
| download | cpython-4b11c74f7c26038f94565a5b73d102bd96cc0e9f.zip cpython-4b11c74f7c26038f94565a5b73d102bd96cc0e9f.tar.gz cpython-4b11c74f7c26038f94565a5b73d102bd96cc0e9f.tar.bz2 | |
Only add 1 byte to all malloc calls when it is known that malloc(0) or
realloc(p, 0) returns NULL. See changes to configure script to be
checked in later.
Diffstat (limited to 'Include/mymalloc.h')
| -rw-r--r-- | Include/mymalloc.h | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/Include/mymalloc.h b/Include/mymalloc.h index 2de5310..944a4dd 100644 --- a/Include/mymalloc.h +++ b/Include/mymalloc.h @@ -78,14 +78,22 @@ extern void free Py_PROTO((ANY *)); /* XXX sometimes int on Unix old systems */ #define NULL ((ANY *)0) #endif +#ifdef MALLOC_ZERO_RETURNS_NULL /* XXX Always allocate one extra byte, since some malloc's return NULL XXX for malloc(0) or realloc(p, 0). */ -#define PyMem_NEW(type, n) ( (type *) malloc(1 + (n) * sizeof(type)) ) +#define _PyMem_EXTRA 1 +#else +#define _PyMem_EXTRA 0 +#endif + +#define PyMem_NEW(type, n) \ + ( (type *) malloc(_PyMem_EXTRA + (n) * sizeof(type)) ) #define PyMem_RESIZE(p, type, n) \ if ((p) == NULL) \ - (p) = (type *) malloc(1 + (n) * sizeof(type)); \ + (p) = (type *) malloc(_PyMem_EXTRA + (n) * sizeof(type)); \ else \ - (p) = (type *) realloc((ANY *)(p), 1 + (n) * sizeof(type)) + (p) = (type *) realloc((ANY *)(p), \ + _PyMem_EXTRA + (n) * sizeof(type)) #define PyMem_DEL(p) free((ANY *)p) #define PyMem_XDEL(p) if ((p) == NULL) ; else PyMem_DEL(p) |