Start of thread pool implementation

runtime/bin/thread_pool.cc

+// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+#include "bin/thread_pool.h"
+
+void ThreadPool::Shutdown() {
+  UNIMPLEMENTED();
+}
+
+
+void ThreadPool::InsertTask(Task task) {
+  TaskQueueEntry* entry = new TaskQueueEntry(task);
+  queue.Insert(entry);
+}
+
+
+Task ThreadPool::WaitForTask() {
+  TaskQueueEntry* entry = queue.Remove();
+  if (entry == NULL) {
+    return -1;
+  }
+  Task task = entry->task();
+  delete entry;
+  return task;
+}
+
+
+void* ThreadPool::Main(void* args) {
+  if (Dart_IsVMFlagSet("trace_thread_pool")) {
+    printf("Thread pool thread started\n");
+  }
+  ThreadPool* pool = reinterpret_cast<ThreadPool*>(args);
+  while (true) {
+    if (Dart_IsVMFlagSet("trace_thread_pool")) {
+      printf("Waiting for task\n");
+    }
+    Task task = pool->WaitForTask();
+    if (Dart_IsVMFlagSet("trace_thread_pool")) {
+      printf("Got task %d\n", task);
+    }
+  }
+  return NULL;
+};