summaryrefslogtreecommitdiff
path: root/src/mongo/util/shared_buffer_fragment_builder.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'src/mongo/util/shared_buffer_fragment_builder.cpp')
-rw-r--r--src/mongo/util/shared_buffer_fragment_builder.cpp79
1 files changed, 0 insertions, 79 deletions
diff --git a/src/mongo/util/shared_buffer_fragment_builder.cpp b/src/mongo/util/shared_buffer_fragment_builder.cpp
deleted file mode 100644
index 06dbda2352b..00000000000
--- a/src/mongo/util/shared_buffer_fragment_builder.cpp
+++ /dev/null
@@ -1,79 +0,0 @@
-/**
- * Copyright (C) 2024-present MongoDB, Inc.
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the Server Side Public License, version 1,
- * as published by MongoDB, Inc.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * Server Side Public License for more details.
- *
- * You should have received a copy of the Server Side Public License
- * along with this program. If not, see
- * <http://www.mongodb.com/licensing/server-side-public-license>.
- *
- * As a special exception, the copyright holders give permission to link the
- * code of portions of this program with the OpenSSL library under certain
- * conditions as described in each individual source file and distribute
- * linked combinations including the program with the OpenSSL library. You
- * must comply with the Server Side Public License in all respects for
- * all of the code used other than as permitted herein. If you modify file(s)
- * with this exception, you may extend this exception to your version of the
- * file(s), but you are not obligated to do so. If you do not wish to do so,
- * delete this exception statement from your version. If you delete this
- * exception statement from all source files in the program, then also delete
- * it in the license file.
- */
-
-#include "mongo/util/shared_buffer_fragment.h"
-
-namespace mongo {
-
-void SharedBufferFragmentBuilder::freeUnused() {
- if (_activeBuffers.empty()) {
- return;
- }
-
- // Normally all buffers are expected to no longer be shared and can be freed immediately,
- // however, the last buffer may still be shared with the owning SharedBufferFragmentBuilder.
- auto it = std::remove_if(
- _activeBuffers.begin(), _activeBuffers.end(), [](auto&& buf) { return !buf.isShared(); });
- _activeBuffers.erase(it, _activeBuffers.end());
-
- // Recalculate memory used by active buffers.
- size_t remaining = _buffer.capacity();
- for (auto&& buf : _activeBuffers) {
- remaining += buf.capacity();
- }
- _memUsage = remaining;
-}
-
-SharedBuffer SharedBufferFragmentBuilder::_realloc(SharedBuffer&& existing,
- size_t offset,
- size_t existingSize,
- size_t newSize) {
- // If nothing else is using the internal buffer it would be safe to use realloc. But as
- // this potentially is a large buffer realloc would need copy all of it as it doesn't
- // know how much is actually used. So we create a new buffer in all cases
- auto newBuffer = SharedBuffer::allocate(newSize);
- _memUsage += newBuffer.capacity();
-
- // When existingSize is 0 we may be in an initial alloc().
- if (existing && existingSize) {
- memcpy(newBuffer.get(), existing.get() + offset, existingSize);
- }
-
- // If this buffer is actively used somewhere, we'll need to keep a reference to it for
- // tracking memory usage since there may be other fragments that are also holding onto a
- // reference. Otherwise, we let it get freed. Callers will have to take care to clean up
- // these shared references regularly using freeUnused().
- if (existing.isShared()) {
- _activeBuffers.push_back(std::move(existing));
- } else {
- _memUsage -= existing.capacity();
- }
- return newBuffer;
-}
-} // namespace mongo