Sweden-Number/dlls/windows.gaming.input/event_handlers.c

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/* WinRT Windows.Gaming.Input implementation
*
* Copyright 2022 Rémi Bernon for CodeWeavers
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "private.h"
static CRITICAL_SECTION handlers_cs;
static CRITICAL_SECTION_DEBUG handlers_cs_debug =
{
0, 0, &handlers_cs,
{ &handlers_cs_debug.ProcessLocksList, &handlers_cs_debug.ProcessLocksList },
0, 0, { (DWORD_PTR)(__FILE__ ": handlers_cs") }
};
static CRITICAL_SECTION handlers_cs = { &handlers_cs_debug, -1, 0, 0, 0, 0 };
static EventRegistrationToken next_token = {.value = 1};
struct handler_entry
{
struct list entry;
EventRegistrationToken token;
IEventHandler_IInspectable *handler;
};
HRESULT event_handlers_append( struct list *list, IEventHandler_IInspectable *handler, EventRegistrationToken *token )
{
struct handler_entry *entry;
if (!(entry = calloc( 1, sizeof(*entry) ))) return E_OUTOFMEMORY;
IEventHandler_IInspectable_AddRef( (entry->handler = handler) );
EnterCriticalSection( &handlers_cs );
*token = entry->token = next_token;
next_token.value++;
list_add_tail( list, &entry->entry );
LeaveCriticalSection( &handlers_cs );
return S_OK;
}
HRESULT event_handlers_remove( struct list *list, EventRegistrationToken *token )
{
struct handler_entry *entry;
BOOL found = FALSE;
EnterCriticalSection( &handlers_cs );
LIST_FOR_EACH_ENTRY( entry, list, struct handler_entry, entry )
if ((found = !memcmp( &entry->token, token, sizeof(*token) ))) break;
if (found) list_remove( &entry->entry );
LeaveCriticalSection( &handlers_cs );
if (found)
{
IEventHandler_IInspectable_Release( entry->handler );
free( entry );
}
return S_OK;
}
void event_handlers_notify( struct list *list, IInspectable *element )
{
struct handler_entry *entry;
EnterCriticalSection( &handlers_cs );
LIST_FOR_EACH_ENTRY( entry, list, struct handler_entry, entry )
IEventHandler_IInspectable_Invoke( entry->handler, NULL, element );
LeaveCriticalSection( &handlers_cs );
}