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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, 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 lock_table[ locknum ].crit.DebugInfo->Spare[0] = (DWORD_PTR)(__FILE__ ": LOCKTABLEENTRY.crit");
46 msvcrt_mlock_set_entry_initialized( locknum, TRUE );
49 static inline void msvcrt_uninitialize_mlock( int locknum )
51 lock_table[ locknum ].crit.DebugInfo->Spare[0] = 0;
52 DeleteCriticalSection( &(lock_table[ locknum ].crit) );
53 msvcrt_mlock_set_entry_initialized( locknum, FALSE );
56 /**********************************************************************
57 * msvcrt_init_mt_locks (internal)
59 * Initialize the table lock. All other locks will be initialized
63 void msvcrt_init_mt_locks(void)
67 TRACE( "initializing mtlocks\n" );
69 /* Initialize the table */
70 for( i=0; i < _TOTAL_LOCKS; i++ )
72 msvcrt_mlock_set_entry_initialized( i, FALSE );
75 /* Initialize our lock table lock */
76 msvcrt_initialize_mlock( _LOCKTAB_LOCK );
79 /**********************************************************************
80 * msvcrt_free_mt_locks (internal)
82 * Uninitialize all mt locks. Assume that neither _lock or _unlock will
83 * be called once we're calling this routine (ie _LOCKTAB_LOCK can be deleted)
86 void msvcrt_free_mt_locks(void)
90 TRACE( ": uninitializing all mtlocks\n" );
92 /* Uninitialize the table */
93 for( i=0; i < _TOTAL_LOCKS; i++ )
95 if( lock_table[ i ].bInit )
97 msvcrt_uninitialize_mlock( i );
103 /**********************************************************************
106 void CDECL _lock( int locknum )
108 TRACE( "(%d)\n", locknum );
110 /* If the lock doesn't exist yet, create it */
111 if( lock_table[ locknum ].bInit == FALSE )
113 /* Lock while we're changing the lock table */
114 _lock( _LOCKTAB_LOCK );
116 /* Check again if we've got a bit of a race on lock creation */
117 if( lock_table[ locknum ].bInit == FALSE )
119 TRACE( ": creating lock #%d\n", locknum );
120 msvcrt_initialize_mlock( locknum );
123 /* Unlock ourselves */
124 _unlock( _LOCKTAB_LOCK );
127 EnterCriticalSection( &(lock_table[ locknum ].crit) );
130 /**********************************************************************
133 * NOTE: There is no error detection to make sure the lock exists and is acquired.
135 void CDECL _unlock( int locknum )
137 TRACE( "(%d)\n", locknum );
139 LeaveCriticalSection( &(lock_table[ locknum ].crit) );