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  • Committer: lbieber
  • Date: 2010-10-02 19:48:35 UTC
  • mfrom: (1730.6.19 drizzle-make-lcov)
  • Revision ID: lbieber@orisndriz08-20101002194835-q5zd9qc4lvx1xnfo
Merge Hartmut - clean up lex, now require flex to build, also "make lcov" improvements

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plugin/innobase/include/os0sync.ic
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/*****************************************************************************
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Copyright (C) 1995, 2009, Innobase Oy. All Rights Reserved.
 
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Copyright (c) 1995, 2009, Innobase Oy. All Rights Reserved.
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This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free Software
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc., 51 Franklin
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St, Fifth Floor, Boston, MA 02110-1301 USA
 
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this program; if not, write to the Free Software Foundation, Inc., 59 Temple
 
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Place, Suite 330, Boston, MA 02111-1307 USA
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*****************************************************************************/
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#include <pthread.h>
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/**********************************************************//**
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Acquires ownership of a fast mutex.
 
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Acquires ownership of a fast mutex. Currently in Windows this is the same
 
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as os_fast_mutex_lock!
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@return 0 if success, != 0 if was reserved by another thread */
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UNIV_INLINE
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ulint
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        os_fast_mutex_t*        fast_mutex)     /*!< in: mutex to acquire */
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{
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#ifdef __WIN__
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        if (TryEnterCriticalSection(fast_mutex)) {
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                return(0);
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        } else {
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                return(1);
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        }
 
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        EnterCriticalSection(fast_mutex);
 
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        return(0);
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#else
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        /* NOTE that the MySQL my_pthread.h redefines pthread_mutex_trylock
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        so that it returns 0 on success. In the operating system