From 19fcec84d8d7d21e796c7624e521b60d28ee21ed Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 20:45:59 +0200
Subject: Adding upstream version 16.2.11+ds.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 .../persistent_cache/block_cache_tier_metadata.cc  | 86 ++++++++++++++++++++++
 1 file changed, 86 insertions(+)
 create mode 100644 src/rocksdb/utilities/persistent_cache/block_cache_tier_metadata.cc

(limited to 'src/rocksdb/utilities/persistent_cache/block_cache_tier_metadata.cc')

diff --git a/src/rocksdb/utilities/persistent_cache/block_cache_tier_metadata.cc b/src/rocksdb/utilities/persistent_cache/block_cache_tier_metadata.cc
new file mode 100644
index 000000000..c99322e6b
--- /dev/null
+++ b/src/rocksdb/utilities/persistent_cache/block_cache_tier_metadata.cc
@@ -0,0 +1,86 @@
+//  Copyright (c) 2013, Facebook, Inc.  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).
+#ifndef ROCKSDB_LITE
+
+#include "utilities/persistent_cache/block_cache_tier_metadata.h"
+
+#include <functional>
+
+namespace ROCKSDB_NAMESPACE {
+
+bool BlockCacheTierMetadata::Insert(BlockCacheFile* file) {
+  return cache_file_index_.Insert(file);
+}
+
+BlockCacheFile* BlockCacheTierMetadata::Lookup(const uint32_t cache_id) {
+  BlockCacheFile* ret = nullptr;
+  BlockCacheFile lookup_key(cache_id);
+  bool ok = cache_file_index_.Find(&lookup_key, &ret);
+  if (ok) {
+    assert(ret->refs_);
+    return ret;
+  }
+  return nullptr;
+}
+
+BlockCacheFile* BlockCacheTierMetadata::Evict() {
+  using std::placeholders::_1;
+  auto fn = std::bind(&BlockCacheTierMetadata::RemoveAllKeys, this, _1);
+  return cache_file_index_.Evict(fn);
+}
+
+void BlockCacheTierMetadata::Clear() {
+  cache_file_index_.Clear([](BlockCacheFile* arg){ delete arg; });
+  block_index_.Clear([](BlockInfo* arg){ delete arg; });
+}
+
+BlockInfo* BlockCacheTierMetadata::Insert(const Slice& key, const LBA& lba) {
+  std::unique_ptr<BlockInfo> binfo(new BlockInfo(key, lba));
+  if (!block_index_.Insert(binfo.get())) {
+    return nullptr;
+  }
+  return binfo.release();
+}
+
+bool BlockCacheTierMetadata::Lookup(const Slice& key, LBA* lba) {
+  BlockInfo lookup_key(key);
+  BlockInfo* block;
+  port::RWMutex* rlock = nullptr;
+  if (!block_index_.Find(&lookup_key, &block, &rlock)) {
+    return false;
+  }
+
+  ReadUnlock _(rlock);
+  assert(block->key_ == key.ToString());
+  if (lba) {
+    *lba = block->lba_;
+  }
+  return true;
+}
+
+BlockInfo* BlockCacheTierMetadata::Remove(const Slice& key) {
+  BlockInfo lookup_key(key);
+  BlockInfo* binfo = nullptr;
+  bool ok __attribute__((__unused__));
+  ok = block_index_.Erase(&lookup_key, &binfo);
+  assert(ok);
+  return binfo;
+}
+
+void BlockCacheTierMetadata::RemoveAllKeys(BlockCacheFile* f) {
+  for (BlockInfo* binfo : f->block_infos()) {
+    BlockInfo* tmp = nullptr;
+    bool status = block_index_.Erase(binfo, &tmp);
+    (void)status;
+    assert(status);
+    assert(tmp == binfo);
+    delete binfo;
+  }
+  f->block_infos().clear();
+}
+
+}  // namespace ROCKSDB_NAMESPACE
+
+#endif
-- 
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