Function activeDefragSds

app/redis-6.2.6/src/defrag.c:78–87

Defrag helper for sds strings * * returns NULL in case the allocation wasn't moved. * when it returns a non-null value, the old pointer was already released * and should NOT be accessed. */

 * when it returns a non-null value, the old pointer was already released
 * and should NOT be accessed. */
sds activeDefragSds(sds sdsptr) {
    void* ptr = sdsAllocPtr(sdsptr);
    void* newptr = activeDefragAlloc(ptr);
    if (newptr) {
        size_t offset = sdsptr - (char*)ptr;
        sdsptr = (char*)newptr + offset;
        return sdsptr;
    }
    return NULL;
}

/* Defrag helper for robj and/or string objects
 *