34 lines
812 B
C
34 lines
812 B
C
#include "libc/mem/mem.h"
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#include "libc/sysv/errfuns.h"
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#include "third_party/dlmalloc/dlmalloc.internal.h"
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void *dlrealloc_in_place(void *oldmem, size_t bytes) {
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void *mem = 0;
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if (oldmem != 0) {
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if (bytes >= MAX_REQUEST) {
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enomem();
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} else {
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size_t nb = request2size(bytes);
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mchunkptr oldp = mem2chunk(oldmem);
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#if !FOOTERS
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mstate m = g_dlmalloc;
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#else /* FOOTERS */
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mstate m = get_mstate_for(oldp);
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if (!ok_magic(m)) {
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USAGE_ERROR_ACTION(m, oldmem);
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return 0;
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}
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#endif /* FOOTERS */
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if (!PREACTION(m)) {
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mchunkptr newp = dlmalloc_try_realloc_chunk(m, oldp, nb, 0);
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POSTACTION(m);
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if (newp == oldp) {
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check_inuse_chunk(m, newp);
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mem = oldmem;
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}
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}
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}
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}
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return mem;
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}
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