fork of https://github.com/oxigraph/rocksdb and https://github.com/facebook/rocksdb for nextgraph and oxigraph
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
36 lines
1.0 KiB
36 lines
1.0 KiB
// Copyright (c) 2013, Facebook, Inc. All rights reserved.
|
|
// This source code is licensed under the BSD-style license found in the
|
|
// LICENSE file in the root directory of this source tree. An additional grant
|
|
// of patent rights can be found in the PATENTS file in the same directory.
|
|
|
|
#include "dynamic_bloom.h"
|
|
|
|
#include "rocksdb/slice.h"
|
|
#include "util/hash.h"
|
|
|
|
namespace rocksdb {
|
|
|
|
namespace {
|
|
static uint32_t BloomHash(const Slice& key) {
|
|
return Hash(key.data(), key.size(), 0xbc9f1d34);
|
|
}
|
|
}
|
|
|
|
DynamicBloom::DynamicBloom(uint32_t total_bits,
|
|
uint32_t (*hash_func)(const Slice& key),
|
|
uint32_t num_probes)
|
|
: hash_func_(hash_func),
|
|
kTotalBits((total_bits + 7) / 8 * 8),
|
|
kNumProbes(num_probes) {
|
|
assert(hash_func_);
|
|
assert(kNumProbes > 0);
|
|
assert(kTotalBits > 0);
|
|
data_.reset(new unsigned char[kTotalBits / 8]());
|
|
}
|
|
|
|
DynamicBloom::DynamicBloom(uint32_t total_bits,
|
|
uint32_t num_probes)
|
|
: DynamicBloom(total_bits, &BloomHash, num_probes) {
|
|
}
|
|
|
|
} // rocksdb
|
|
|