1 // Copyright 2013 the V8 project 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 V8_LIBPLATFORM_DEFAULT_PLATFORM_H_
6 #define V8_LIBPLATFORM_DEFAULT_PLATFORM_H_
7
8 #include <functional>
9 #include <map>
10 #include <memory>
11 #include <queue>
12 #include <vector>
13
14 #include "include/libplatform/libplatform-export.h"
15 #include "include/libplatform/v8-tracing.h"
16 #include "include/v8-platform.h"
17 #include "src/base/compiler-specific.h"
18 #include "src/base/macros.h"
19 #include "src/base/platform/mutex.h"
20 #include "src/libplatform/task-queue.h"
21
22 namespace v8 {
23 namespace platform {
24
25 class TaskQueue;
26 class Thread;
27 class WorkerThread;
28
29 namespace tracing {
30 class TracingController;
31 }
32
NON_EXPORTED_BASE(Platform)33 class V8_PLATFORM_EXPORT DefaultPlatform : public NON_EXPORTED_BASE(Platform) {
34 public:
35 DefaultPlatform();
36 virtual ~DefaultPlatform();
37
38 void SetThreadPoolSize(int thread_pool_size);
39
40 void EnsureInitialized();
41
42 bool PumpMessageLoop(v8::Isolate* isolate);
43
44 void RunIdleTasks(v8::Isolate* isolate, double idle_time_in_seconds);
45
46 // v8::Platform implementation.
47 size_t NumberOfAvailableBackgroundThreads() override;
48 void CallOnBackgroundThread(Task* task,
49 ExpectedRuntime expected_runtime) override;
50 void CallOnForegroundThread(v8::Isolate* isolate, Task* task) override;
51 void CallDelayedOnForegroundThread(Isolate* isolate, Task* task,
52 double delay_in_seconds) override;
53 void CallIdleOnForegroundThread(Isolate* isolate, IdleTask* task) override;
54 bool IdleTasksEnabled(Isolate* isolate) override;
55 double MonotonicallyIncreasingTime() override;
56 const uint8_t* GetCategoryGroupEnabled(const char* name) override;
57 const char* GetCategoryGroupName(
58 const uint8_t* category_enabled_flag) override;
59 using Platform::AddTraceEvent;
60 uint64_t AddTraceEvent(
61 char phase, const uint8_t* category_enabled_flag, const char* name,
62 const char* scope, uint64_t id, uint64_t bind_id, int32_t num_args,
63 const char** arg_names, const uint8_t* arg_types,
64 const uint64_t* arg_values,
65 std::unique_ptr<v8::ConvertableToTraceFormat>* arg_convertables,
66 unsigned int flags) override;
67 void UpdateTraceEventDuration(const uint8_t* category_enabled_flag,
68 const char* name, uint64_t handle) override;
69 void SetTracingController(tracing::TracingController* tracing_controller);
70
71 void AddTraceStateObserver(TraceStateObserver* observer) override;
72 void RemoveTraceStateObserver(TraceStateObserver* observer) override;
73
74 private:
75 static const int kMaxThreadPoolSize;
76
77 Task* PopTaskInMainThreadQueue(v8::Isolate* isolate);
78 Task* PopTaskInMainThreadDelayedQueue(v8::Isolate* isolate);
79 IdleTask* PopTaskInMainThreadIdleQueue(v8::Isolate* isolate);
80
81 base::Mutex lock_;
82 bool initialized_;
83 int thread_pool_size_;
84 std::vector<WorkerThread*> thread_pool_;
85 TaskQueue queue_;
86 std::map<v8::Isolate*, std::queue<Task*>> main_thread_queue_;
87 std::map<v8::Isolate*, std::queue<IdleTask*>> main_thread_idle_queue_;
88
89 typedef std::pair<double, Task*> DelayedEntry;
90 std::map<v8::Isolate*,
91 std::priority_queue<DelayedEntry, std::vector<DelayedEntry>,
92 std::greater<DelayedEntry> > >
93 main_thread_delayed_queue_;
94 std::unique_ptr<tracing::TracingController> tracing_controller_;
95
96 DISALLOW_COPY_AND_ASSIGN(DefaultPlatform);
97 };
98
99
100 } // namespace platform
101 } // namespace v8
102
103
104 #endif // V8_LIBPLATFORM_DEFAULT_PLATFORM_H_
105