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| 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 | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "tools/gn/item_node.h" | |
| 6 | |
| 7 #include <algorithm> | |
| 8 | |
| 9 #include "base/callback.h" | |
| 10 #include "base/logging.h" | |
| 11 #include "tools/gn/build_settings.h" | |
| 12 #include "tools/gn/item.h" | |
| 13 | |
| 14 ItemNode::ItemNode(Item* i) | |
| 15 : state_(REFERENCED), | |
| 16 item_(i), | |
| 17 should_generate_(false) { | |
| 18 item_->set_item_node(this); | |
| 19 } | |
| 20 | |
| 21 ItemNode::~ItemNode() { | |
| 22 } | |
| 23 | |
| 24 bool ItemNode::SetShouldGenerate(const BuildSettings* build_settings, | |
| 25 Err* err) { | |
| 26 if (should_generate_) | |
| 27 return true; | |
| 28 should_generate_ = true; | |
| 29 | |
| 30 if (state_ == DEFINED) { | |
| 31 if (!ScheduleDepsLoad(build_settings, err)) | |
| 32 return false; | |
| 33 } else if (state_ == RESOLVED) { | |
| 34 // The item may have been resolved even if we didn't set the generate bit | |
| 35 // if all of its deps were loaded some other way. In this case, we need | |
| 36 // to run the closure which we skipped when it became resolved. | |
| 37 if (!resolved_closure_.is_null()) | |
| 38 resolved_closure_.Run(); | |
| 39 } | |
| 40 | |
| 41 // Pass the generate bit to all deps. | |
| 42 for (ItemNodeMap::iterator i = direct_dependencies_.begin(); | |
| 43 i != direct_dependencies_.end(); ++i) { | |
| 44 if (!i->first->SetShouldGenerate(build_settings, err)) | |
| 45 return false; | |
| 46 } | |
| 47 return true; | |
| 48 } | |
| 49 | |
| 50 bool ItemNode::AddDependency(const BuildSettings* build_settings, | |
| 51 const LocationRange& specified_from_here, | |
| 52 ItemNode* node, | |
| 53 Err* err) { | |
| 54 // Can't add more deps once it's been defined. | |
| 55 DCHECK(state_ == REFERENCED); | |
| 56 | |
| 57 if (direct_dependencies_.find(node) != direct_dependencies_.end()) | |
| 58 return true; // Already have this dep. | |
| 59 | |
| 60 direct_dependencies_[node] = specified_from_here; | |
| 61 | |
| 62 if (node->state() != RESOLVED) { | |
| 63 // Wire up the pending resolution info. | |
| 64 unresolved_dependencies_[node] = specified_from_here; | |
| 65 node->waiting_on_resolution_[this] = specified_from_here; | |
| 66 } | |
| 67 | |
| 68 if (should_generate_) { | |
| 69 if (!node->SetShouldGenerate(build_settings, err)) | |
| 70 return false; | |
| 71 } | |
| 72 return true; | |
| 73 } | |
| 74 | |
| 75 void ItemNode::MarkDirectDependencyResolved(ItemNode* node) { | |
| 76 DCHECK(unresolved_dependencies_.find(node) != unresolved_dependencies_.end()); | |
| 77 unresolved_dependencies_.erase(node); | |
| 78 } | |
| 79 | |
| 80 void ItemNode::SwapOutWaitingDependencySet(ItemNodeMap* out_map) { | |
| 81 waiting_on_resolution_.swap(*out_map); | |
| 82 DCHECK(waiting_on_resolution_.empty()); | |
| 83 } | |
| 84 | |
| 85 bool ItemNode::SetDefined(const BuildSettings* build_settings, Err* err) { | |
| 86 DCHECK(state_ == REFERENCED); | |
| 87 state_ = DEFINED; | |
| 88 | |
| 89 if (should_generate_) | |
| 90 return ScheduleDepsLoad(build_settings, err); | |
| 91 return true; | |
| 92 } | |
| 93 | |
| 94 void ItemNode::SetResolved() { | |
| 95 DCHECK(state_ != RESOLVED); | |
| 96 state_ = RESOLVED; | |
| 97 | |
| 98 if (should_generate_ && !resolved_closure_.is_null()) | |
| 99 resolved_closure_.Run(); | |
| 100 } | |
| 101 | |
| 102 bool ItemNode::ScheduleDepsLoad(const BuildSettings* build_settings, | |
| 103 Err* err) { | |
| 104 DCHECK(state_ == DEFINED); | |
| 105 DCHECK(should_generate_); // Shouldn't be requesting deps for ungenerated | |
| 106 // items. | |
| 107 | |
| 108 for (ItemNodeMap::const_iterator i = unresolved_dependencies_.begin(); | |
| 109 i != unresolved_dependencies_.end(); ++i) { | |
| 110 Label toolchain_label = i->first->item()->label().GetToolchainLabel(); | |
| 111 SourceDir dir_to_load = i->first->item()->label().dir(); | |
| 112 | |
| 113 if (!build_settings->toolchain_manager().ScheduleInvocationLocked( | |
| 114 i->second, toolchain_label, dir_to_load, err)) | |
| 115 return false; | |
| 116 } | |
| 117 | |
| 118 state_ = PENDING_DEPS; | |
| 119 return true; | |
| 120 } | |
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