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PFCOUNT: unshare the object when cached cardinality is modified.

This commit is contained in:
antirez 2014-04-03 10:37:32 +02:00
parent be9860d0e9
commit 9682295f68
1 changed files with 3 additions and 0 deletions
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3
src/hyperloglog.c
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@ -541,6 +541,9 @@ void pfcountCommand(redisClient *c) {
card |= (uint64_t)registers[REDIS_HLL_SIZE-9] << 56;
} else {
/* Recompute it and update the cached value. */
o = dbUnshareStringValue(c->db,c->argv[1],o);
registers = o->ptr;
card = hllCount(registers);
registers[REDIS_HLL_SIZE-16] = card & 0xff;
registers[REDIS_HLL_SIZE-15] = (card >> 8) & 0xff;