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don't shrink in array_allocate

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leitner
2005-08-24 17:30:40 +00:00
parent e1e80badf0
commit 12caccfd48
2 changed files with 24 additions and 16 deletions
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35
array/array_allocate.c
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@@ -56,25 +56,28 @@ void* array_allocate(array* x,uint64 membersize,int64 pos) {
/* second case of overflow: pos*membersize too large */
if (__unlikely(!umult64(membersize,pos+1,&wanted))) return 0;
if (__unlikely(wanted >= (uint64)x->allocated)) {
/* round up a little */
if (membersize<8)
wanted=(wanted+127)&(-128ll); /* round up to multiple of 128 */
else
wanted=(wanted+4095)&(-4096ll); /* round up to 4k pages */
if (wanted > (uint64)x->initialized) {
if (__unlikely(wanted >= (uint64)x->allocated)) {
/* round up a little */
if (membersize<8)
wanted=(wanted+127)&(-128ll); /* round up to multiple of 128 */
else
wanted=(wanted+4095)&(-4096ll); /* round up to 4k pages */
if (__unlikely(wanted<128)) return 0; /* overflow during rounding */
if (__unlikely(wanted<128)) return 0; /* overflow during rounding */
if (sizeof(size_t) != sizeof(int64) && __unlikely((size_t)(wanted) != wanted))
return 0;
{
char* tmp=realloc(x->p,wanted);
if (__unlikely(!tmp)) return 0;
x->p=tmp;
if (sizeof(size_t) != sizeof(int64) && __unlikely((size_t)(wanted) != wanted))
return 0;
{
char* tmp=realloc(x->p,wanted);
if (__unlikely(!tmp)) return 0;
x->p=tmp;
}
x->allocated=wanted;
byte_zero(x->p+x->initialized,x->allocated-x->initialized);
}
x->allocated=wanted;
byte_zero(x->p+x->initialized,x->allocated-x->initialized);
x->initialized=(pos+1)*membersize;
}
x->initialized=(pos+1)*membersize;
return x->p+pos*membersize;
}