147dfc7bdf
Summary: Primitive types constness does not affect the signature of the method and has no influence on whether the overriding method would actually have that const bool instead of just bool. In addition, it is rarely useful but does produce a compatibility warnings in VS 2015 compiler. Closes https://github.com/facebook/rocksdb/pull/3663 Differential Revision: D7475739 Pulled By: ajkr fbshipit-source-id: fb275378b5acc397399420ae6abb4b6bfe5bd32f
33 lines
1.2 KiB
C++
33 lines
1.2 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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#pragma once
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#include "rocksdb/status.h"
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namespace rocksdb {
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class DB;
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class PreReleaseCallback {
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public:
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virtual ~PreReleaseCallback() {}
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// Will be called while on the write thread after the write and before the
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// release of the sequence number. This is useful if any operation needs to be
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// done before the write gets visible to the readers, or if we want to reduce
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// the overhead of locking by updating something sequentially while we are on
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// the write thread. If the callback fails, this function returns a non-OK
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// status, the sequence number will not be released, and same status will be
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// propagated to all the writers in the write group.
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// seq is the sequence number that is used for this write and will be
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// released.
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// is_mem_disabled is currently used for debugging purposes to assert that
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// the callback is done from the right write queue.
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virtual Status Callback(SequenceNumber seq, bool is_mem_disabled) = 0;
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};
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} // namespace rocksdb
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