81 lines
2.6 KiB
C++
81 lines
2.6 KiB
C++
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// Copyright (c) 2013 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "tools/gn/config.h"
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#include "tools/gn/err.h"
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#include "tools/gn/input_file_manager.h"
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#include "tools/gn/item_node.h"
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#include "tools/gn/item_tree.h"
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#include "tools/gn/scheduler.h"
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Config::Config(const Label& label) : Item(label) {
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}
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Config::~Config() {
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}
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Config* Config::AsConfig() {
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return this;
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}
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const Config* Config::AsConfig() const {
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return this;
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}
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// static
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Config* Config::GetConfig(const Settings* settings,
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const LocationRange& specified_from_here,
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const Label& label,
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Item* dep_from,
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Err* err) {
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DCHECK(!label.is_null());
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ItemTree* tree = &settings->build_settings()->item_tree();
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base::AutoLock lock(tree->lock());
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ItemNode* node = tree->GetExistingNodeLocked(label);
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Config* config = NULL;
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if (!node) {
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config = new Config(label);
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node = new ItemNode(config);
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tree->AddNodeLocked(node);
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// Only schedule loading the given target if somebody is depending on it
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// (and we optimize by not re-asking it to run the current file).
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// Otherwise, we're probably generating it right now.
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if (dep_from && dep_from->label().dir() != label.dir()) {
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settings->build_settings()->toolchain_manager().ScheduleInvocationLocked(
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specified_from_here, label.GetToolchainLabel(), label.dir(),
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err);
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}
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} else if ((config = node->item()->AsConfig())) {
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// Previously saw this item as a config.
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// If we have no dep_from, we're generating it. In this case, it had better
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// not already be generated.
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if (!dep_from && node->state() != ItemNode::REFERENCED) {
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*err = Err(specified_from_here, "Duplicate config definition.",
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"You already told me about a config with this name.");
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return NULL;
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}
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} else {
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// Previously saw this thing as a non-config.
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*err = Err(specified_from_here,
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"Config name already used.",
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"Previously you specified a " +
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node->item()->GetItemTypeName() + " with this name instead.");
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return NULL;
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}
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// Keep a record of the guy asking us for this dependency. We know if
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// somebody is adding a dependency, that guy it himself not resolved.
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if (dep_from) {
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if (!tree->GetExistingNodeLocked(dep_from->label())->AddDependency(
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settings->build_settings(), specified_from_here, node, err))
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return NULL;
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}
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return config;
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}
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