mach_port_deallocate() the result of mach_thread_self(), which obtains a port send right.

base/threading/platform_thread_unittest.cc

Index: base/threading/platform_thread_unittest.cc
diff --git a/base/threading/platform_thread_unittest.cc b/base/threading/platform_thread_unittest.cc
index 6bff1d45c7ff058d2626e2296a1269aed67acacf..2170f9203d26bb14882c577e11290fad8a7176d2 100644
--- a/base/threading/platform_thread_unittest.cc
+++ b/base/threading/platform_thread_unittest.cc
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include "base/compiler_specific.h"
 #include "base/threading/platform_thread.h"
 
 #include "testing/gtest/include/gtest/gtest.h"
@@ -83,6 +84,9 @@ TEST(PlatformThreadTest, Function) {
   PlatformThread::Join(handle);
   ASSERT_TRUE(thread.did_run());
   EXPECT_NE(thread.thread_id(), main_thread_id);
+
+  // Make sure that the thread ID is the same across calls.
+  EXPECT_EQ(main_thread_id, PlatformThread::CurrentId());
 }
 
 TEST(PlatformThreadTest, FunctionTimesTen) {
@@ -101,6 +105,9 @@ TEST(PlatformThreadTest, FunctionTimesTen) {
     ASSERT_TRUE(thread[n].did_run());
     EXPECT_NE(thread[n].thread_id(), main_thread_id);
   }

[Mark Mentovai, 2012/01/10 19:13:46]

And maybe put a check somewhere in here to make sure that no two threads wound
up with the same ID.

[Robert Sesek, 2012/01/10 19:17:58]

Done.

+
+  // Make sure that the thread ID is the same across calls.
+  EXPECT_EQ(main_thread_id, PlatformThread::CurrentId());
 }
 
 }  // namespace base