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#include "base/simple_thread.h"

#include "base/call_wrapper.h"
#include "base/waitable_event.h"
#include "base/logging.h"
#include "base/platform_thread.h"
#include "base/string_util.h"

namespace base {

void SimpleThread::Start() {
  DCHECK(!HasBeenStarted()) << "Tried to Start a thread multiple times.";
  bool success = PlatformThread::Create(options_.stack_size(), this, &thread_);
  CHECK(success);
  event_.Wait();  // Wait for the thread to complete initialization.
}

void SimpleThread::Join() {
  DCHECK(HasBeenStarted()) << "Tried to Join a never-started thread.";
  DCHECK(!HasBeenJoined()) << "Tried to Join a thread multiple times.";
  PlatformThread::Join(thread_);
  joined_ = true;
}

void SimpleThread::ThreadMain() {
  tid_ = PlatformThread::CurrentId();
  // Construct our full name of the form "name_prefix_/TID".
  name_.push_back('/');
  name_.append(IntToString(tid_));
  PlatformThread::SetName(tid_, name_.c_str());

  // We've initialized our new thread, signal that we're done to Start().
  event_.Signal();

  Run();
}

SimpleThread::~SimpleThread() {
  DCHECK(HasBeenStarted()) << "SimpleThread was never started.";
  DCHECK(HasBeenJoined()) << "SimpleThread destroyed without being Join()ed.";
}

void CallWrapperSimpleThread::Run() {
  DCHECK(wrapper_) << "Tried to call Run without a wrapper (called twice?)";
  wrapper_->Run();
  wrapper_ = NULL;
}

}  // namespace base