Adds TCMalloc support for Android.

third_party/tcmalloc/chromium/src/maybe_threads.cc

 // Copyright (c) 2005, Google Inc.
 // All rights reserved.
-// 
+//

[Dai Mikurube (NOT FULLTIME), 2013/05/03 08:53:00]

nit: unnecessary deletion

[bulach, 2013/05/07 14:55:51]

Done.

 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
-// 
+//
 //     * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 // copyright notice, this list of conditions and the following disclaimer
 // in the documentation and/or other materials provided with the
 // distribution.
 //     * Neither the name of Google Inc. nor the names of its
 // contributors may be used to endorse or promote products derived from
 // this software without specific prior written permission.
-// 
+//
 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
@@ skipping 89 matching lines @@
   }
   if (!__isthreaded) {
     init_routine();
     pthread_once_ran_before_threads = true;
     return 0;
   }
 #endif
   if (pthread_once) {
     return pthread_once(ctl, init_routine);
   } else {
-    if (memcmp(ctl, &pthread_once_init, sizeof(*ctl)) == 0) {
+    if (memcmp((const void*)(ctl),
+               (const void*)(&pthread_once_init),
+               sizeof(*ctl)) == 0) {

[Dai Mikurube (NOT FULLTIME), 2013/05/03 08:53:00]

Is it necessary for Android?

[bulach, 2013/05/07 14:55:51]

yep.. memcmp takes "const void*", the arguments here are "void volatile*" and
fails with:
maybe_threads.cc:129:28: error: invalid conversion from 'void volatile*' to
'void const*' [-fpermissive]
/usr/local/google/code/clankium-master/src/third_party/android_tools/ndk//platforms/android-14/arch-arm/usr/include/../include/string.h:40:15:
error:   initializing argument 2 of 'int memcmp(void const*, void const*,
size_t)' [-fpermissive]

       init_routine();
       ++*(char*)(ctl);        // make it so it's no longer equal to init
     }
     return 0;
   }
 }