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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_SCHEDULER_H_ |
| 6 #define TOOLS_GN_SCHEDULER_H_ |
| 7 |
| 8 #include "base/atomic_ref_count.h" |
| 9 #include "base/basictypes.h" |
| 10 #include "base/message_loop/message_loop.h" |
| 11 #include "base/run_loop.h" |
| 12 #include "base/synchronization/lock.h" |
| 13 #include "base/threading/sequenced_worker_pool.h" |
| 14 #include "tools/gn/input_file_manager.h" |
| 15 |
| 16 class Target; |
| 17 |
| 18 // Maintains the thread pool and error state. |
| 19 class Scheduler { |
| 20 public: |
| 21 Scheduler(); |
| 22 ~Scheduler(); |
| 23 |
| 24 bool Run(); |
| 25 |
| 26 base::MessageLoop* main_loop() { return &main_loop_; } |
| 27 base::SequencedWorkerPool* pool() { return pool_; } |
| 28 |
| 29 InputFileManager* input_file_manager() { return input_file_manager_; } |
| 30 |
| 31 bool verbose_logging() const { return verbose_logging_; } |
| 32 void set_verbose_logging(bool v) { verbose_logging_ = v; } |
| 33 |
| 34 // TODO(brettw) data race on this access (benign?). |
| 35 bool is_failed() const { return is_failed_; } |
| 36 |
| 37 void Log(const std::string& verb, const std::string& msg); |
| 38 void FailWithError(const Err& err); |
| 39 |
| 40 void ScheduleWork(const base::Closure& work); |
| 41 |
| 42 void ScheduleTargetFileWrite(const Target* target); |
| 43 |
| 44 // Declares that the given file was read and affected the build output. |
| 45 // |
| 46 // TODO(brettw) this is global rather than per-BuildSettings. If we |
| 47 // start using >1 build settings, then we probably want this to take a |
| 48 // BuildSettings object so we know the depdency on a per-build basis. |
| 49 void AddGenDependency(const SourceFile& source_file); |
| 50 std::vector<SourceFile> GetGenDependencies() const; |
| 51 |
| 52 // We maintain a count of the things we need to do that works like a |
| 53 // refcount. When this reaches 0, the program exits. |
| 54 void IncrementWorkCount(); |
| 55 void DecrementWorkCount(); |
| 56 |
| 57 private: |
| 58 void LogOnMainThread(const std::string& verb, const std::string& msg); |
| 59 void FailWithErrorOnMainThread(const Err& err); |
| 60 |
| 61 void DoTargetFileWrite(const Target* target); |
| 62 |
| 63 void DoWork(const base::Closure& closure); |
| 64 |
| 65 void OnComplete(); |
| 66 |
| 67 base::MessageLoop main_loop_; |
| 68 scoped_refptr<base::SequencedWorkerPool> pool_; |
| 69 |
| 70 scoped_refptr<InputFileManager> input_file_manager_; |
| 71 |
| 72 base::RunLoop runner_; |
| 73 |
| 74 bool verbose_logging_; |
| 75 |
| 76 base::AtomicRefCount work_count_; |
| 77 |
| 78 mutable base::Lock lock_; |
| 79 bool is_failed_; |
| 80 |
| 81 // Additional input dependencies. Protected by the lock. |
| 82 std::vector<SourceFile> gen_dependencies_; |
| 83 |
| 84 DISALLOW_COPY_AND_ASSIGN(Scheduler); |
| 85 }; |
| 86 |
| 87 extern Scheduler* g_scheduler; |
| 88 |
| 89 #endif // TOOLS_GN_SCHEDULER_H_ |
| 90 |
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