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Whether platform malloc(0) returns NULL has nothing to do with whether

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platform realloc(p, 0) returns NULL, so MALLOC_ZERO_RETURNS_NULL can
be correctly undefined yet realloc(p, 0) can return NULL anyway.

Prevent realloc(p, 0) doing free(p) and returning NULL via a different
hack.  Would probably be better to get rid of MALLOC_ZERO_RETURNS_NULL
entirely.

Bugfix candidate.
This commit is contained in:
Tim Peters 2002-03-02 08:43:19 +00:00
parent b77d343bc8
commit a5d78cc208
3 changed files with 24 additions and 14 deletions
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7
Objects/object.c
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@ -1894,11 +1894,8 @@ PyMem_Malloc(size_t nbytes)
void *
PyMem_Realloc(void *p, size_t nbytes)
{
#if _PyMem_EXTRA > 0
if (nbytes == 0)
nbytes = _PyMem_EXTRA;
#endif
return PyMem_REALLOC(p, nbytes);
/* See comment near MALLOC_ZERO_RETURNS_NULL in pyport.h. */
return PyMem_REALLOC(p, nbytes ? nbytes : 1);
}
void