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149 lines
4.2 KiB
C
149 lines
4.2 KiB
C
/*
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* MSCMS - Color Management System for Wine
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*
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* Copyright 2004, 2005, 2008 Hans Leidekker
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include <stdarg.h>
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#include <stdlib.h>
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#include "windef.h"
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#include "winbase.h"
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#include "wingdi.h"
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#include "winuser.h"
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#include "icm.h"
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#include "wine/debug.h"
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#include "mscms_priv.h"
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WINE_DEFAULT_DEBUG_CHANNEL(mscms);
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static CRITICAL_SECTION mscms_handle_cs;
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static CRITICAL_SECTION_DEBUG mscms_handle_cs_debug =
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{
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0, 0, &mscms_handle_cs,
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{ &mscms_handle_cs_debug.ProcessLocksList,
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&mscms_handle_cs_debug.ProcessLocksList },
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0, 0, { (DWORD_PTR)(__FILE__ ": mscms_handle_cs") }
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};
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static CRITICAL_SECTION mscms_handle_cs = { &mscms_handle_cs_debug, -1, 0, 0, 0, 0 };
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static struct object **handle_table;
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static ULONG_PTR next_handle;
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static ULONG_PTR max_handles;
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struct object *grab_object( HANDLE handle, enum object_type type )
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{
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struct object *obj = NULL;
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ULONG_PTR index = (ULONG_PTR)handle;
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EnterCriticalSection( &mscms_handle_cs );
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if (index > 0 && index <= max_handles)
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{
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index--;
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if (handle_table[index] && handle_table[index]->type == type)
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{
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obj = handle_table[index];
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InterlockedIncrement( &obj->refs );
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}
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}
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LeaveCriticalSection( &mscms_handle_cs );
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TRACE( "handle %p -> %p\n", handle, obj );
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return obj;
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}
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void release_object( struct object *obj )
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{
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ULONG refs = InterlockedDecrement( &obj->refs );
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if (!refs)
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{
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if (obj->close) obj->close( obj );
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TRACE( "destroying object %p\n", obj );
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free( obj );
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}
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}
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#define HANDLE_TABLE_SIZE 4
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HANDLE alloc_handle( struct object *obj )
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{
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struct object **ptr;
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ULONG_PTR index, count;
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EnterCriticalSection( &mscms_handle_cs );
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if (!max_handles)
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{
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count = HANDLE_TABLE_SIZE;
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if (!(ptr = calloc( 1, sizeof(*ptr) * count )))
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{
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LeaveCriticalSection( &mscms_handle_cs );
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return 0;
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}
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handle_table = ptr;
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max_handles = count;
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}
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if (max_handles == next_handle)
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{
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size_t new_size, old_size = max_handles * sizeof(*ptr);
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count = max_handles * 2;
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new_size = count * sizeof(*ptr);
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if (!(ptr = realloc( handle_table, new_size )))
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{
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LeaveCriticalSection( &mscms_handle_cs );
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return 0;
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}
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memset( (char *)ptr + old_size, 0, new_size - old_size );
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handle_table = ptr;
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max_handles = count;
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}
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index = next_handle;
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if (handle_table[index]) ERR( "handle isn't free but should be\n" );
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handle_table[index] = obj;
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InterlockedIncrement( &obj->refs );
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while (next_handle < max_handles && handle_table[next_handle]) next_handle++;
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LeaveCriticalSection( &mscms_handle_cs );
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TRACE( "object %p -> %Ix\n", obj, index + 1 );
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return (HANDLE)(index + 1);
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}
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void free_handle( HANDLE handle )
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{
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struct object *obj = NULL;
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ULONG_PTR index = (ULONG_PTR)handle;
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EnterCriticalSection( &mscms_handle_cs );
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if (index > 0 && index <= max_handles)
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{
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index--;
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if (handle_table[index])
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{
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obj = handle_table[index];
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TRACE( "destroying handle %p for object %p\n", handle, obj );
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handle_table[index] = NULL;
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}
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}
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LeaveCriticalSection( &mscms_handle_cs );
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if (obj) release_object( obj );
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EnterCriticalSection( &mscms_handle_cs );
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if (next_handle > index && !handle_table[index]) next_handle = index;
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LeaveCriticalSection( &mscms_handle_cs );
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}
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