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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-21 11:54:28 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-21 11:54:28 +0000 |
commit | e6918187568dbd01842d8d1d2c808ce16a894239 (patch) | |
tree | 64f88b554b444a49f656b6c656111a145cbbaa28 /src/rocksdb/util/distributed_mutex.h | |
parent | Initial commit. (diff) | |
download | ceph-upstream/18.2.2.tar.xz ceph-upstream/18.2.2.zip |
Adding upstream version 18.2.2.upstream/18.2.2
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/rocksdb/util/distributed_mutex.h')
-rw-r--r-- | src/rocksdb/util/distributed_mutex.h | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/src/rocksdb/util/distributed_mutex.h b/src/rocksdb/util/distributed_mutex.h new file mode 100644 index 000000000..9675a1e2d --- /dev/null +++ b/src/rocksdb/util/distributed_mutex.h @@ -0,0 +1,48 @@ +// Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved. +// This source code is licensed under both the GPLv2 (found in the +// COPYING file in the root directory) and Apache 2.0 License +// (found in the LICENSE.Apache file in the root directory). + +#pragma once + +#include "rocksdb/rocksdb_namespace.h" + +// This file declares a wrapper around the efficient folly DistributedMutex +// that falls back on a standard mutex when not available. See +// https://github.com/facebook/folly/blob/main/folly/synchronization/DistributedMutex.h +// for benefits and limitations. + +// At the moment, only scoped locking is supported using DMutexLock +// RAII wrapper, because lock/unlock APIs will vary. + +#ifdef USE_FOLLY + +#include <folly/synchronization/DistributedMutex.h> + +namespace ROCKSDB_NAMESPACE { + +class DMutex : public folly::DistributedMutex { + public: + static const char* kName() { return "folly::DistributedMutex"; } + + explicit DMutex(bool IGNORED_adaptive = false) { (void)IGNORED_adaptive; } + + // currently no-op + void AssertHeld() {} +}; +using DMutexLock = std::lock_guard<folly::DistributedMutex>; + +} // namespace ROCKSDB_NAMESPACE + +#else + +#include "port/port.h" + +namespace ROCKSDB_NAMESPACE { + +using DMutex = port::Mutex; +using DMutexLock = std::lock_guard<DMutex>; + +} // namespace ROCKSDB_NAMESPACE + +#endif |