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121 lines
3.3 KiB
121 lines
3.3 KiB
/* Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserve.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License. */
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#include "paddle/framework/scope.h"
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#include <memory> // for unique_ptr
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#include <mutex> // for call_once
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#include "glog/logging.h"
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#include "paddle/framework/threadpool.h"
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#include "paddle/string/printf.h"
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namespace paddle {
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namespace framework {
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Scope::~Scope() {
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DropKids();
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for (auto& kv : vars_) {
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VLOG(3) << "Destroy variable " << kv.first;
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delete kv.second;
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}
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}
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Scope& Scope::NewScope() const {
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kids_.push_back(new Scope(this));
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return *kids_.back();
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}
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Variable* Scope::Var(const std::string& name) {
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auto* v = FindVarLocally(name);
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if (v != nullptr) return v;
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v = new Variable();
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vars_[name] = v;
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VLOG(3) << "Create variable " << name;
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v->name_ = &(vars_.find(name)->first);
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return v;
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}
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Variable* Scope::Var(std::string* name) {
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auto var_name = string::Sprintf("%p.%d", this, vars_.size());
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if (name != nullptr) {
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*name = var_name;
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}
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return Var(var_name);
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}
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Variable* Scope::FindVar(const std::string& name) const {
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auto var = FindVarLocally(name);
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if (var != nullptr) {
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return var;
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}
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return (parent_ == nullptr) ? nullptr : parent_->FindVar(name);
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}
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const Scope* Scope::FindScope(const Variable* var) const {
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for (auto& kv : vars_) {
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if (kv.second == var) {
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return this;
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}
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}
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return (parent_ == nullptr) ? nullptr : parent_->FindScope(var);
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}
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void Scope::DropKids() {
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for (Scope* s : kids_) delete s;
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kids_.clear();
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}
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std::vector<std::string> Scope::LocalVarNames() const {
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std::vector<std::string> known_vars;
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known_vars.reserve(this->vars_.size());
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for (auto& p : vars_) {
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known_vars.emplace_back(p.first);
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}
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return known_vars;
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}
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void Scope::DeleteScope(Scope* scope) {
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auto it = std::find(this->kids_.begin(), this->kids_.end(), scope);
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PADDLE_ENFORCE(it != this->kids_.end(), "Cannot find %p as kid scope", scope);
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this->kids_.erase(it);
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// Make delete async.
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Async([scope] { delete scope; });
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}
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void Scope::Rename(const std::string& origin_name,
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const std::string& new_name) const {
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auto origin_it = vars_.find(origin_name);
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PADDLE_ENFORCE(origin_it != vars_.end(),
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"Cannot find original variable with name %s", origin_name);
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auto new_it = vars_.find(new_name);
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PADDLE_ENFORCE(new_it == vars_.end(),
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"The variable with name %s is already in the scope", new_name);
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vars_[new_name] = origin_it->second;
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vars_.erase(origin_it);
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}
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std::string Scope::Rename(const std::string& origin_name) const {
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auto var_name = string::Sprintf("%p.%d", this, vars_.size());
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Rename(origin_name, var_name);
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return var_name;
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}
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Variable* Scope::FindVarLocally(const std::string& name) const {
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auto it = vars_.find(name);
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if (it != vars_.end()) return it->second;
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return nullptr;
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}
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} // namespace framework
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} // namespace paddle
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