make debug mode ~20% faster on linux

base/threading/platform_thread_posix.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/threading/platform_thread.h"
 
 #include <errno.h>
 #include <sched.h>
 
 #include "base/lazy_instance.h"
@@ skipping 146 matching lines @@
 #elif defined(OS_NACL) && defined(__GLIBC__)
   return pthread_self();
 #elif defined(OS_NACL) && !defined(__GLIBC__)
   // Pointers are 32-bits in NaCl.
   return reinterpret_cast<int32>(pthread_self());
 #elif defined(OS_POSIX)
   return reinterpret_cast<int64>(pthread_self());
 #endif
 }
 
-//static
+// static
+PlatformThreadRef PlatformThread::CurrentRef() {
+  return PlatformThreadRef(pthread_self());
+}
+
+// static
 PlatformThreadHandle PlatformThread::CurrentHandle() {
   return PlatformThreadHandle(pthread_self(), CurrentId());
 }
 
 // static
 void PlatformThread::YieldCurrentThread() {
   sched_yield();
 }
 
 // static
@@ skipping 46 matching lines @@
 // static
 void PlatformThread::Join(PlatformThreadHandle thread_handle) {
   // Joining another thread may block the current thread for a long time, since
   // the thread referred to by |thread_handle| may still be running long-lived /
   // blocking tasks.
   base::ThreadRestrictions::AssertIOAllowed();
   CHECK_EQ(0, pthread_join(thread_handle.handle_, NULL));
 }
 
 }  // namespace base