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Justine Tunney 2020-06-15 07:18:57 -07:00
commit c91b3c5006
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33
third_party/dlmalloc/dlrealloc_in_place.c vendored Normal file
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#include "libc/mem/mem.h"
#include "libc/sysv/errfuns.h"
#include "third_party/dlmalloc/dlmalloc.h"
void *dlrealloc_in_place(void *oldmem, size_t bytes) {
void *mem = 0;
if (oldmem != 0) {
if (bytes >= MAX_REQUEST) {
enomem();
} else {
size_t nb = request2size(bytes);
mchunkptr oldp = mem2chunk(oldmem);
#if !FOOTERS
mstate m = gm;
#else /* FOOTERS */
mstate m = get_mstate_for(oldp);
if (!ok_magic(m)) {
USAGE_ERROR_ACTION(m, oldmem);
return 0;
}
#endif /* FOOTERS */
if (!PREACTION(m)) {
mchunkptr newp = dlmalloc_try_realloc_chunk(m, oldp, nb, 0);
POSTACTION(m);
if (newp == oldp) {
check_inuse_chunk(m, newp);
mem = oldmem;
}
}
}
}
return mem;
}