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1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "tools/gn/config.h" | 5 #include "tools/gn/config.h" |
6 | 6 |
7 #include "tools/gn/err.h" | 7 #include "tools/gn/err.h" |
8 #include "tools/gn/input_file_manager.h" | 8 #include "tools/gn/input_file_manager.h" |
9 #include "tools/gn/item_node.h" | |
10 #include "tools/gn/item_tree.h" | |
11 #include "tools/gn/scheduler.h" | 9 #include "tools/gn/scheduler.h" |
12 | 10 |
13 Config::Config(const Settings* settings, const Label& label) | 11 Config::Config(const Settings* settings, const Label& label) |
14 : Item(settings, label) { | 12 : Item(settings, label) { |
15 } | 13 } |
16 | 14 |
17 Config::~Config() { | 15 Config::~Config() { |
18 } | 16 } |
19 | 17 |
20 Config* Config::AsConfig() { | 18 Config* Config::AsConfig() { |
21 return this; | 19 return this; |
22 } | 20 } |
23 | 21 |
24 const Config* Config::AsConfig() const { | 22 const Config* Config::AsConfig() const { |
25 return this; | 23 return this; |
26 } | 24 } |
27 | |
28 // static | |
29 Config* Config::GetConfig(const Settings* settings, | |
30 const LocationRange& specified_from_here, | |
31 const Label& label, | |
32 Item* dep_from, | |
33 Err* err) { | |
34 DCHECK(!label.is_null()); | |
35 | |
36 ItemTree* tree = &settings->build_settings()->item_tree(); | |
37 base::AutoLock lock(tree->lock()); | |
38 | |
39 ItemNode* node = tree->GetExistingNodeLocked(label); | |
40 Config* config = NULL; | |
41 if (!node) { | |
42 config = new Config(settings, label); | |
43 node = new ItemNode(config); | |
44 node->set_originally_referenced_from_here(specified_from_here); | |
45 tree->AddNodeLocked(node); | |
46 | |
47 // Only schedule loading the given target if somebody is depending on it | |
48 // (and we optimize by not re-asking it to run the current file). | |
49 // Otherwise, we're probably generating it right now. | |
50 if (dep_from && dep_from->label().dir() != label.dir()) { | |
51 settings->build_settings()->toolchain_manager().ScheduleInvocationLocked( | |
52 specified_from_here, label.GetToolchainLabel(), label.dir(), | |
53 err); | |
54 } | |
55 } else if ((config = node->item()->AsConfig())) { | |
56 // Previously saw this item as a config. | |
57 | |
58 // If we have no dep_from, we're generating it. In this case, it had better | |
59 // not already be generated. | |
60 if (!dep_from && node->state() != ItemNode::REFERENCED) { | |
61 *err = Err(specified_from_here, "Duplicate config definition.", | |
62 "You already told me about a config with this name."); | |
63 return NULL; | |
64 } | |
65 } else { | |
66 // Previously saw this thing as a non-config. | |
67 *err = Err(specified_from_here, | |
68 "Config name already used.", | |
69 "Previously you specified a " + | |
70 node->item()->GetItemTypeName() + " with this name instead."); | |
71 return NULL; | |
72 } | |
73 | |
74 // Keep a record of the guy asking us for this dependency. We know if | |
75 // somebody is adding a dependency, that guy it himself not resolved. | |
76 if (dep_from) { | |
77 if (!dep_from->item_node()->AddDependency( | |
78 settings->build_settings(), specified_from_here, node, err)) | |
79 return NULL; | |
80 } | |
81 return config; | |
82 } | |
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