Change the thread interface in runtime/platform and use it starting all threads

runtime/platform/thread_linux.cc

Index: runtime/platform/thread_linux.cc
diff --git a/runtime/platform/thread_linux.cc b/runtime/platform/thread_linux.cc
index 338c4c8d1cab8cf9ebb01ae465117f5e20c6b779..eb22cac423e7f1ea6a32988fc82ec9e365a74b0d 100644
--- a/runtime/platform/thread_linux.cc
+++ b/runtime/platform/thread_linux.cc
@@ -35,18 +35,15 @@ static void ComputeTimeSpec(struct timespec* ts, int64_t millis) {
 class ThreadStartData {
  public:
   ThreadStartData(Thread::ThreadStartFunction function,
-                  uword parameter,
-                  Thread* thread)
-      : function_(function), parameter_(parameter), thread_(thread) {}
+                  uword parameter)
+      : function_(function), parameter_(parameter) {}
 
   Thread::ThreadStartFunction function() const { return function_; }
   uword parameter() const { return parameter_; }
-  Thread* thread() const { return thread_; }
 
  private:
   Thread::ThreadStartFunction function_;
   uword parameter_;
-  Thread* thread_;
 
   DISALLOW_COPY_AND_ASSIGN(ThreadStartData);
 };
@@ -60,20 +57,16 @@ static void* ThreadStart(void* data_ptr) {
 
   Thread::ThreadStartFunction function = data->function();
   uword parameter = data->parameter();
-  Thread* thread = data->thread();
   delete data;
 
   // Call the supplied thread start function handing it its parameters.
   function(parameter);
 
-  // When the function returns here, make sure that the thread is deleted.
-  delete thread;
-
   return NULL;
 }
 
 
-Thread::Thread(ThreadStartFunction function, uword parameter) {
+void Thread::Start(ThreadStartFunction function, uword parameter) {
   pthread_attr_t attr;
   int result = pthread_attr_init(&attr);
   VALIDATE_PTHREAD_RESULT(result);
@@ -84,26 +77,17 @@ Thread::Thread(ThreadStartFunction function, uword parameter) {
   result = pthread_attr_setstacksize(&attr, 1024 * KB);
   VALIDATE_PTHREAD_RESULT(result);
 
-  ThreadStartData* data = new ThreadStartData(function, parameter, this);
+  ThreadStartData* data = new ThreadStartData(function, parameter);
 
   pthread_t tid;
-  result = pthread_create(&tid,
-                          &attr,
-                          ThreadStart,
-                          data);
+  result = pthread_create(&tid, &attr, ThreadStart, data);
   VALIDATE_PTHREAD_RESULT(result);
 
-  data_.tid_ = tid;
-
   result = pthread_attr_destroy(&attr);
   VALIDATE_PTHREAD_RESULT(result);
 }
 
 
-Thread::~Thread() {
-}
-
-
 Mutex::Mutex() {
   pthread_mutexattr_t attr;
   int result = pthread_mutexattr_init(&attr);