2 * Copyright (c) 2002, TransGaming Technologies Inc.
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 #include "wine/debug.h"
27 WINE_DEFAULT_DEBUG_CHANNEL(msvcrt);
32 CRITICAL_SECTION crit;
35 static LOCKTABLEENTRY lock_table[ _TOTAL_LOCKS ];
37 static inline void msvcrt_mlock_set_entry_initialized( int locknum, BOOL initialized )
39 lock_table[ locknum ].bInit = initialized;
42 static inline void msvcrt_initialize_mlock( int locknum )
44 InitializeCriticalSection( &(lock_table[ locknum ].crit) );
45 msvcrt_mlock_set_entry_initialized( locknum, TRUE );
48 static inline void msvcrt_uninitialize_mlock( int locknum )
50 DeleteCriticalSection( &(lock_table[ locknum ].crit) );
51 msvcrt_mlock_set_entry_initialized( locknum, FALSE );
54 /**********************************************************************
55 * msvcrt_init_mt_locks (internal)
57 * Initialize the table lock. All other locks will be initialized
61 void msvcrt_init_mt_locks(void)
65 TRACE( "initializing mtlocks\n" );
67 /* Initialize the table */
68 for( i=0; i < _TOTAL_LOCKS; i++ )
70 msvcrt_mlock_set_entry_initialized( i, FALSE );
73 /* Initialize our lock table lock */
74 msvcrt_initialize_mlock( _LOCKTAB_LOCK );
77 /**********************************************************************
78 * msvcrt_free_mt_locks (internal)
80 * Uninitialize all mt locks. Assume that neither _lock or _unlock will
81 * be called once we're calling this routine (ie _LOCKTAB_LOCK can be deleted)
84 void msvcrt_free_mt_locks(void)
88 TRACE( ": uninitializing all mtlocks\n" );
90 /* Uninitialize the table */
91 for( i=0; i < _TOTAL_LOCKS; i++ )
93 if( lock_table[ i ].bInit )
95 msvcrt_uninitialize_mlock( i );
101 /**********************************************************************
104 void _lock( int locknum )
106 TRACE( "(%d)\n", locknum );
108 /* If the lock doesn't exist yet, create it */
109 if( lock_table[ locknum ].bInit == FALSE )
111 /* Lock while we're changing the lock table */
112 _lock( _LOCKTAB_LOCK );
114 /* Check again if we've got a bit of a race on lock creation */
115 if( lock_table[ locknum ].bInit == FALSE )
117 TRACE( ": creating lock #%d\n", locknum );
118 msvcrt_initialize_mlock( locknum );
121 /* Unlock ourselves */
122 _unlock( _LOCKTAB_LOCK );
125 EnterCriticalSection( &(lock_table[ locknum ].crit) );
128 /**********************************************************************
131 * NOTE: There is no error detection to make sure the lock exists and is acquired.
133 void _unlock( int locknum )
135 TRACE( "(%d)\n", locknum );
137 LeaveCriticalSection( &(lock_table[ locknum ].crit) );