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9adca070ba
Also, produce fully static binaries. This means that `gethostname` does not work (doesn't work with static glibc unless you build it with `--enable-static-nss`, which no distro builds glibc with).
44 lines
1.6 KiB
C++
44 lines
1.6 KiB
C++
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under both the GPLv2 (found in the
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// COPYING file in the root directory) and Apache 2.0 License
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// (found in the LICENSE.Apache file in the root directory).
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#include <rocksdb/env.h>
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#include <rocksdb/merge_operator.h>
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#include <rocksdb/slice.h>
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#include "RocksDBUtils.hpp"
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namespace { // anonymous namespace
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// A 'model' merge operator with int64 addition semantics
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// Implemented as an AssociativeMergeOperator for simplicity and example.
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class Int64AddOperator : public rocksdb::AssociativeMergeOperator {
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public:
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bool Merge(const rocksdb::Slice& key, const rocksdb::Slice* existing_value,
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const rocksdb::Slice& value, std::string* new_value,
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rocksdb::Logger* logger) const override {
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int64_t orig_value = 0;
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if (existing_value) {
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orig_value = ExternalValue<I64Value>::FromSlice(*existing_value)().i64();
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}
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int64_t operand = ExternalValue<I64Value>::FromSlice(value)().i64();
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ALWAYS_ASSERT(new_value);
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new_value->resize(I64Value::MAX_SIZE);
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ExternalValue<I64Value>(*new_value)().setI64(orig_value + operand);
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return true;
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}
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static const char* kClassName() { return "Int64AddOperator"; }
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static const char* kNickName() { return "int64add"; }
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const char* Name() const override { return kClassName(); }
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const char* NickName() const override { return kNickName(); }
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};
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} // anonymous namespace
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std::shared_ptr<rocksdb::MergeOperator> CreateInt64AddOperator() {
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return std::make_shared<Int64AddOperator>();
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} |