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641.2.2
by Monty Taylor
InnoDB Plugin 1.0.3 |
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/*****************************************************************************
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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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Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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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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1802.10.2
by Monty Taylor
Update all of the copyright headers to include the correct address. |
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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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641.2.2
by Monty Taylor
InnoDB Plugin 1.0.3 |
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*****************************************************************************/
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641.2.3
by Monty Taylor
InnoDB Plugin 1.0.4 |
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/**************************************************//**
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@file include/os0sync.ic
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641.1.2
by Monty Taylor
Imported 1.0.1 with clean - with no changes. |
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The interface to the operating system synchronization primitives.
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Created 9/6/1995 Heikki Tuuri
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*******************************************************/
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#ifdef __WIN__ |
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#include <winbase.h> |
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#endif
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1280.1.10
by Monty Taylor
Put everything in drizzled into drizzled namespace. |
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#include <pthread.h> |
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641.2.3
by Monty Taylor
InnoDB Plugin 1.0.4 |
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/**********************************************************//**
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1819.9.44
by Calvin Sun, Stewart Smith
Merge Revision revid:calvin.sun@oracle.com-20100720204231-h3nw0d9q3h79krr4 from MySQL InnoDB |
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Acquires ownership of a fast mutex.
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641.2.3
by Monty Taylor
InnoDB Plugin 1.0.4 |
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@return 0 if success, != 0 if was reserved by another thread */
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641.1.2
by Monty Taylor
Imported 1.0.1 with clean - with no changes. |
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UNIV_INLINE
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ulint
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os_fast_mutex_trylock( |
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/*==================*/
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641.2.3
by Monty Taylor
InnoDB Plugin 1.0.4 |
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os_fast_mutex_t* fast_mutex) /*!< in: mutex to acquire */ |
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641.1.2
by Monty Taylor
Imported 1.0.1 with clean - with no changes. |
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{
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#ifdef __WIN__ |
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1819.9.44
by Calvin Sun, Stewart Smith
Merge Revision revid:calvin.sun@oracle.com-20100720204231-h3nw0d9q3h79krr4 from MySQL InnoDB |
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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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641.1.2
by Monty Taylor
Imported 1.0.1 with clean - with no changes. |
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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
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libraries, HP-UX-10.20 follows the old Posix 1003.4a Draft 4 and
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returns 1 on success (but MySQL remaps that to 0), while Linux,
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FreeBSD, Solaris, AIX, Tru64 Unix, HP-UX-11.0 return 0 on success. */
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return((ulint) pthread_mutex_trylock(fast_mutex)); |
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#endif
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}
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