Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 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 | #include "src/libplatform/default-platform.h" |
| 6 | |
| 7 | #include <algorithm> |
| 8 | #include <queue> |
| 9 | |
| 10 | #include "src/base/logging.h" |
| 11 | #include "src/base/platform/platform.h" |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 12 | #include "src/base/platform/time.h" |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 13 | #include "src/base/sys-info.h" |
| 14 | #include "src/libplatform/worker-thread.h" |
| 15 | |
| 16 | namespace v8 { |
| 17 | namespace platform { |
| 18 | |
| 19 | |
| 20 | v8::Platform* CreateDefaultPlatform(int thread_pool_size) { |
| 21 | DefaultPlatform* platform = new DefaultPlatform(); |
| 22 | platform->SetThreadPoolSize(thread_pool_size); |
| 23 | platform->EnsureInitialized(); |
| 24 | return platform; |
| 25 | } |
| 26 | |
| 27 | |
| 28 | bool PumpMessageLoop(v8::Platform* platform, v8::Isolate* isolate) { |
| 29 | return reinterpret_cast<DefaultPlatform*>(platform)->PumpMessageLoop(isolate); |
| 30 | } |
| 31 | |
| 32 | |
| 33 | const int DefaultPlatform::kMaxThreadPoolSize = 4; |
| 34 | |
| 35 | |
| 36 | DefaultPlatform::DefaultPlatform() |
| 37 | : initialized_(false), thread_pool_size_(0) {} |
| 38 | |
| 39 | |
| 40 | DefaultPlatform::~DefaultPlatform() { |
| 41 | base::LockGuard<base::Mutex> guard(&lock_); |
| 42 | queue_.Terminate(); |
| 43 | if (initialized_) { |
| 44 | for (std::vector<WorkerThread*>::iterator i = thread_pool_.begin(); |
| 45 | i != thread_pool_.end(); ++i) { |
| 46 | delete *i; |
| 47 | } |
| 48 | } |
| 49 | for (std::map<v8::Isolate*, std::queue<Task*> >::iterator i = |
| 50 | main_thread_queue_.begin(); |
| 51 | i != main_thread_queue_.end(); ++i) { |
| 52 | while (!i->second.empty()) { |
| 53 | delete i->second.front(); |
| 54 | i->second.pop(); |
| 55 | } |
| 56 | } |
| 57 | } |
| 58 | |
| 59 | |
| 60 | void DefaultPlatform::SetThreadPoolSize(int thread_pool_size) { |
| 61 | base::LockGuard<base::Mutex> guard(&lock_); |
| 62 | DCHECK(thread_pool_size >= 0); |
| 63 | if (thread_pool_size < 1) { |
| 64 | thread_pool_size = base::SysInfo::NumberOfProcessors(); |
| 65 | } |
| 66 | thread_pool_size_ = |
| 67 | std::max(std::min(thread_pool_size, kMaxThreadPoolSize), 1); |
| 68 | } |
| 69 | |
| 70 | |
| 71 | void DefaultPlatform::EnsureInitialized() { |
| 72 | base::LockGuard<base::Mutex> guard(&lock_); |
| 73 | if (initialized_) return; |
| 74 | initialized_ = true; |
| 75 | |
| 76 | for (int i = 0; i < thread_pool_size_; ++i) |
| 77 | thread_pool_.push_back(new WorkerThread(&queue_)); |
| 78 | } |
| 79 | |
| 80 | |
| 81 | bool DefaultPlatform::PumpMessageLoop(v8::Isolate* isolate) { |
| 82 | Task* task = NULL; |
| 83 | { |
| 84 | base::LockGuard<base::Mutex> guard(&lock_); |
| 85 | std::map<v8::Isolate*, std::queue<Task*> >::iterator it = |
| 86 | main_thread_queue_.find(isolate); |
| 87 | if (it == main_thread_queue_.end() || it->second.empty()) { |
| 88 | return false; |
| 89 | } |
| 90 | task = it->second.front(); |
| 91 | it->second.pop(); |
| 92 | } |
| 93 | task->Run(); |
| 94 | delete task; |
| 95 | return true; |
| 96 | } |
| 97 | |
| 98 | void DefaultPlatform::CallOnBackgroundThread(Task *task, |
| 99 | ExpectedRuntime expected_runtime) { |
| 100 | EnsureInitialized(); |
| 101 | queue_.Append(task); |
| 102 | } |
| 103 | |
| 104 | |
| 105 | void DefaultPlatform::CallOnForegroundThread(v8::Isolate* isolate, Task* task) { |
| 106 | base::LockGuard<base::Mutex> guard(&lock_); |
| 107 | main_thread_queue_[isolate].push(task); |
| 108 | } |
| 109 | |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame^] | 110 | |
| 111 | double DefaultPlatform::MonotonicallyIncreasingTime() { |
| 112 | return base::TimeTicks::HighResolutionNow().ToInternalValue() / |
| 113 | static_cast<double>(base::Time::kMicrosecondsPerSecond); |
| 114 | } |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 115 | } } // namespace v8::platform |