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authorSfan5 <sfan5@live.de>2013-09-09 22:46:18 +0200
committerSfan5 <sfan5@live.de>2013-09-09 22:50:51 +0200
commit3725179736e2b5372664163470e7ef3dc76529a4 (patch)
tree7a56c929ae75530679b3d2f7c9c02fb361760219 /src/leveldb/db/table_cache.cc
parent1f3402e7a1e160c4be25c596f33d916b988075fb (diff)
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Use system-wide LevelDB instead of bundled one
Diffstat (limited to 'src/leveldb/db/table_cache.cc')
-rw-r--r--src/leveldb/db/table_cache.cc121
1 files changed, 0 insertions, 121 deletions
diff --git a/src/leveldb/db/table_cache.cc b/src/leveldb/db/table_cache.cc
deleted file mode 100644
index 497db2707..000000000
--- a/src/leveldb/db/table_cache.cc
+++ /dev/null
@@ -1,121 +0,0 @@
-// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file. See the AUTHORS file for names of contributors.
-
-#include "db/table_cache.h"
-
-#include "db/filename.h"
-#include "leveldb/env.h"
-#include "leveldb/table.h"
-#include "util/coding.h"
-
-namespace leveldb {
-
-struct TableAndFile {
- RandomAccessFile* file;
- Table* table;
-};
-
-static void DeleteEntry(const Slice& key, void* value) {
- TableAndFile* tf = reinterpret_cast<TableAndFile*>(value);
- delete tf->table;
- delete tf->file;
- delete tf;
-}
-
-static void UnrefEntry(void* arg1, void* arg2) {
- Cache* cache = reinterpret_cast<Cache*>(arg1);
- Cache::Handle* h = reinterpret_cast<Cache::Handle*>(arg2);
- cache->Release(h);
-}
-
-TableCache::TableCache(const std::string& dbname,
- const Options* options,
- int entries)
- : env_(options->env),
- dbname_(dbname),
- options_(options),
- cache_(NewLRUCache(entries)) {
-}
-
-TableCache::~TableCache() {
- delete cache_;
-}
-
-Status TableCache::FindTable(uint64_t file_number, uint64_t file_size,
- Cache::Handle** handle) {
- Status s;
- char buf[sizeof(file_number)];
- EncodeFixed64(buf, file_number);
- Slice key(buf, sizeof(buf));
- *handle = cache_->Lookup(key);
- if (*handle == NULL) {
- std::string fname = TableFileName(dbname_, file_number);
- RandomAccessFile* file = NULL;
- Table* table = NULL;
- s = env_->NewRandomAccessFile(fname, &file);
- if (s.ok()) {
- s = Table::Open(*options_, file, file_size, &table);
- }
-
- if (!s.ok()) {
- assert(table == NULL);
- delete file;
- // We do not cache error results so that if the error is transient,
- // or somebody repairs the file, we recover automatically.
- } else {
- TableAndFile* tf = new TableAndFile;
- tf->file = file;
- tf->table = table;
- *handle = cache_->Insert(key, tf, 1, &DeleteEntry);
- }
- }
- return s;
-}
-
-Iterator* TableCache::NewIterator(const ReadOptions& options,
- uint64_t file_number,
- uint64_t file_size,
- Table** tableptr) {
- if (tableptr != NULL) {
- *tableptr = NULL;
- }
-
- Cache::Handle* handle = NULL;
- Status s = FindTable(file_number, file_size, &handle);
- if (!s.ok()) {
- return NewErrorIterator(s);
- }
-
- Table* table = reinterpret_cast<TableAndFile*>(cache_->Value(handle))->table;
- Iterator* result = table->NewIterator(options);
- result->RegisterCleanup(&UnrefEntry, cache_, handle);
- if (tableptr != NULL) {
- *tableptr = table;
- }
- return result;
-}
-
-Status TableCache::Get(const ReadOptions& options,
- uint64_t file_number,
- uint64_t file_size,
- const Slice& k,
- void* arg,
- void (*saver)(void*, const Slice&, const Slice&)) {
- Cache::Handle* handle = NULL;
- Status s = FindTable(file_number, file_size, &handle);
- if (s.ok()) {
- Table* t = reinterpret_cast<TableAndFile*>(cache_->Value(handle))->table;
- s = t->InternalGet(options, k, arg, saver);
- cache_->Release(handle);
- }
- return s;
-}
-
-void TableCache::Evict(uint64_t file_number) {
- char buf[sizeof(file_number)];
- EncodeFixed64(buf, file_number);
- cache_->Erase(Slice(buf, sizeof(buf)));
-}
-
-} // namespace leveldb