Revision 1803ed2ccb61c60a003e1d03edb1e17d55acd16a authored by Igor Canadi on 15 April 2014, 23:31:49 UTC, committed by Igor Canadi on 15 April 2014, 23:31:49 UTC
1 parent 7d83885
sync_point.cc
// Copyright (c) 2014, Facebook, Inc. All rights reserved.
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree. An additional grant
// of patent rights can be found in the PATENTS file in the same directory.
#include "util/sync_point.h"
namespace rocksdb {
SyncPoint* SyncPoint::GetInstance() {
static SyncPoint sync_point;
return &sync_point;
}
void SyncPoint::LoadDependency(const std::vector<Dependency>& dependencies) {
successors_.clear();
predecessors_.clear();
cleared_points_.clear();
for (const auto& dependency : dependencies) {
successors_[dependency.predecessor].push_back(dependency.successor);
predecessors_[dependency.successor].push_back(dependency.predecessor);
}
}
bool SyncPoint::PredecessorsAllCleared(const std::string& point) {
for (const auto& pred : predecessors_[point]) {
if (cleared_points_.count(pred) == 0) {
return false;
}
}
return true;
}
void SyncPoint::EnableProcessing() {
std::unique_lock<std::mutex> lock(mutex_);
enabled_ = true;
}
void SyncPoint::DisableProcessing() {
std::unique_lock<std::mutex> lock(mutex_);
enabled_ = false;
}
void SyncPoint::ClearTrace() {
std::unique_lock<std::mutex> lock(mutex_);
cleared_points_.clear();
}
void SyncPoint::Process(const std::string& point) {
std::unique_lock<std::mutex> lock(mutex_);
if (!enabled_) return;
while (!PredecessorsAllCleared(point)) {
cv_.wait(lock);
}
cleared_points_.insert(point);
cv_.notify_all();
}
} // namespace rocksdb
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