initial commit

tddb/td/db/utils/FileSyncState.cpp

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+/*
+    This file is part of TON Blockchain Library.
+
+    TON Blockchain Library is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation, either version 2 of the License, or
+    (at your option) any later version.
+
+    TON Blockchain Library 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
+    GNU Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with TON Blockchain Library.  If not, see <http://www.gnu.org/licenses/>.
+
+    Copyright 2017-2019 Telegram Systems LLP
+*/
+
+#include "FileSyncState.h"
+namespace td {
+std::pair<FileSyncState::Reader, FileSyncState::Writer> FileSyncState::create() {
+  auto self = std::make_shared<Self>();
+  return {Reader(self), Writer(self)};
+}
+
+FileSyncState::Reader::Reader(std::shared_ptr<Self> self) : self(std::move(self)) {
+}
+bool FileSyncState::Reader::set_requested_sync_size(size_t size) const {
+  if (self->requested_synced_size.load(std::memory_order_relaxed) == size) {
+    return false;
+  }
+  self->requested_synced_size.store(size, std::memory_order_release);
+  return true;
+}
+
+size_t FileSyncState::Reader::synced_size() const {
+  return self->synced_size;
+}
+size_t FileSyncState::Reader::flushed_size() const {
+  return self->flushed_size;
+}
+
+FileSyncState::Writer::Writer(std::shared_ptr<Self> self) : self(std::move(self)) {
+}
+
+size_t FileSyncState::Writer::get_requested_synced_size() {
+  return self->requested_synced_size.load(std::memory_order_acquire);
+}
+
+bool FileSyncState::Writer::set_synced_size(size_t size) {
+  if (self->synced_size.load(std::memory_order_relaxed) == size) {
+    return false;
+  }
+  self->synced_size.store(size, std::memory_order_release);
+  return true;
+}
+
+bool FileSyncState::Writer::set_flushed_size(size_t size) {
+  if (self->flushed_size.load(std::memory_order_relaxed) == size) {
+    return false;
+  }
+  self->flushed_size.store(size, std::memory_order_release);
+  return true;
+}
+
+}  // namespace td