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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 #ifndef TOOLS_GN_TARGET_MANAGER_H_ |
| 6 #define TOOLS_GN_TARGET_MANAGER_H_ |
| 7 |
| 8 #include <set> |
| 9 #include <vector> |
| 10 |
| 11 #include "base/basictypes.h" |
| 12 #include "base/containers/hash_tables.h" |
| 13 #include "base/synchronization/lock.h" |
| 14 #include "tools/gn/target.h" |
| 15 |
| 16 class BuildSettings; |
| 17 class Err; |
| 18 class ItemTree; |
| 19 class LocationRange; |
| 20 class ToolchainManager; |
| 21 class Value; |
| 22 |
| 23 // Manages all the targets in the system. This integrates with the ItemTree |
| 24 // to manage the target-specific rules and creation. |
| 25 // |
| 26 // This class is threadsafe. |
| 27 class TargetManager { |
| 28 public: |
| 29 explicit TargetManager(const BuildSettings* settings); |
| 30 ~TargetManager(); |
| 31 |
| 32 // Gets a reference to a named target. The given target name is created if |
| 33 // it doesn't exist. |
| 34 // |
| 35 // The label should be fully specified in that it should include an |
| 36 // explicit toolchain. |
| 37 // |
| 38 // |specified_from_here| should indicate the dependency or the target |
| 39 // generator causing this access for error message generation. |
| 40 // |
| 41 // |dep_from| should be set when a target is getting a dep that it depends |
| 42 // on. |dep_from| indicates the target that specified the dependency. It |
| 43 // will be used to track outstanding dependencies so we can know when the |
| 44 // target and all of its dependencies are complete. It should be null when |
| 45 // getting a target for other reasons. |
| 46 // |
| 47 // On failure, |err| will be set. |
| 48 // |
| 49 // The returned pointer must not be dereferenced until it's generated, since |
| 50 // it could be being generated on another thread. |
| 51 Target* GetTarget(const Label& label, |
| 52 const LocationRange& specified_from_here, |
| 53 Target* dep_from, |
| 54 Err* err); |
| 55 |
| 56 // Called by a target when it has been loaded from the .gin file. Its |
| 57 // dependencies may or may not be resolved yet. |
| 58 void TargetGenerationComplete(const Label& label); |
| 59 |
| 60 // Returns a list of all targets. |
| 61 void GetAllTargets(std::vector<const Target*>* all_targets) const; |
| 62 |
| 63 private: |
| 64 bool ScheduleInvocationLocked(const LocationRange& specified_from_here, |
| 65 const Label& label, |
| 66 Err* err); |
| 67 |
| 68 const BuildSettings* build_settings_; |
| 69 |
| 70 DISALLOW_COPY_AND_ASSIGN(TargetManager); |
| 71 }; |
| 72 |
| 73 #endif // TOOLS_GN_TARGET_MANAGER_H |
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