Line data    Source code

       1             : /* src/threads/lockword.cpp - lockword implementation
       2             : 
       3             :    Copyright (C) 2008
       4             :    CACAOVM - Verein zur Foerderung der freien virtuellen Maschine CACAO
       5             : 
       6             :    This file is part of CACAO.
       7             : 
       8             :    This program is free software; you can redistribute it and/or
       9             :    modify it under the terms of the GNU General Public License as
      10             :    published by the Free Software Foundation; either version 2, or (at
      11             :    your option) any later version.
      12             : 
      13             :    This program is distributed in the hope that it will be useful, but
      14             :    WITHOUT ANY WARRANTY; without even the implied warranty of
      15             :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      16             :    General Public License for more details.
      17             : 
      18             :    You should have received a copy of the GNU General Public License
      19             :    along with this program; if not, write to the Free Software
      20             :    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
      21             :    02110-1301, USA.
      22             : 
      23             : */
      24             : 
      25             : 
      26             : #include "threads/lockword.hpp"
      27             : 
      28             : #include <assert.h>
      29             : 
      30             : #include "threads/lock.hpp"
      31             : #include "threads/thread.hpp"
      32             : 
      33             : 
      34             : /**
      35             :  * Inflate the lock of the given object. This may only be called by
      36             :  * the owner of the monitor of the object.
      37             :  * 
      38             :  * PRE-CONDITION: The current thread must be the owner of this
      39             :  * object's monitor AND of the lock record's lock!
      40             :  *
      41             :  * @param lr The lock-record to install.  The current thread must own
      42             :  *               the lock of this lock record!
      43             :  */
      44       20007 : void Lockword::inflate(lock_record_t* lr)
      45             : {
      46       20007 :         if (is_fat_lock()) {
      47             :                 // Sanity check.
      48           0 :                 assert(get_fat_lock() == lr);
      49           0 :                 return;
      50             :         }
      51             : 
      52             :         // Sanity check.
      53       20007 :         assert(get_thin_lock_without_count() == thread_get_current()->thinlock);
      54             : 
      55             :         // Copy the count from the thinlock.
      56       20007 :         lr->count = get_thin_lock_count();
      57             : 
      58             : //      DEBUGLOCKS(("[lock_inflate      : lr=%p, t=%p, o=%p, o->lockword=%lx, count=%d]",
      59             : //                              lr, thread_get_current(), o, get_thin_lock(), lr->count));
      60             : 
      61             :         // Install the lock-record in the lockword.
      62       20007 :         set(lr);
      63             : }
      64             : 
      65             : 
      66             : /*
      67             :  * These are local overrides for various environment variables in Emacs.
      68             :  * Please do not remove this and leave it at the end of the file, where
      69             :  * Emacs will automagically detect them.
      70             :  * ---------------------------------------------------------------------
      71             :  * Local variables:
      72             :  * mode: c++
      73             :  * indent-tabs-mode: t
      74             :  * c-basic-offset: 4
      75             :  * tab-width: 4
      76             :  * End:
      77             :  * vim:noexpandtab:sw=4:ts=4:
      78             :  */