default-platform.cc

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#include "default-platform.h"

#include <queue>

// TODO(jochen): We should have our own version of checks.h.
#include "../checks.h"
// TODO(jochen): Why is cpu.h not in platform/?
#include "../cpu.h"
#include "worker-thread.h"

namespace v8 {
namespace internal {


DefaultPlatform::DefaultPlatform()
    : initialized_(false), thread_pool_size_(0) {}


DefaultPlatform::~DefaultPlatform() {
  LockGuard<Mutex> guard(&lock_);
  queue_.Terminate();
  if (initialized_) {
    for (std::vector<WorkerThread*>::iterator i = thread_pool_.begin();
         i != thread_pool_.end(); ++i) {
      delete *i;
    }
  }
}


void DefaultPlatform::SetThreadPoolSize(int thread_pool_size) {
  LockGuard<Mutex> guard(&lock_);
  ASSERT(thread_pool_size >= 0);
  if (thread_pool_size < 1)
    thread_pool_size = CPU::NumberOfProcessorsOnline();
  thread_pool_size_ = Max(Min(thread_pool_size, kMaxThreadPoolSize), 1);
}


void DefaultPlatform::EnsureInitialized() {
  LockGuard<Mutex> guard(&lock_);
  if (initialized_) return;
  initialized_ = true;

  for (int i = 0; i < thread_pool_size_; ++i)
    thread_pool_.push_back(new WorkerThread(&queue_));
}

void DefaultPlatform::CallOnBackgroundThread(Task *task,
                                             ExpectedRuntime expected_runtime) {
  EnsureInitialized();
  queue_.Append(task);
}


void DefaultPlatform::CallOnForegroundThread(v8::Isolate* isolate, Task* task) {
  // TODO(jochen): implement.
  task->Run();
  delete task;
}

} }  // namespace v8::internal