dlls/windows.media.speech/event_handlers.c

   1 /* WinRT Windows.Media.SpeechRecognition implementation
   2  *
   3  * Copyright 2022 Bernhard Kölbl
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2.1 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  18  */
  19
  20 #include "private.h"
  21
  22 static CRITICAL_SECTION handlers_cs;
  23 static CRITICAL_SECTION_DEBUG handlers_cs_debug =
  24 {
  25     0, 0, &handlers_cs,
  26     { &handlers_cs_debug.ProcessLocksList, &handlers_cs_debug.ProcessLocksList },
  27       0, 0, { (DWORD_PTR)(__FILE__ ": handlers_cs") }
  28 };
  29 static CRITICAL_SECTION handlers_cs = { &handlers_cs_debug, -1, 0, 0, 0, 0 };
  30 static EventRegistrationToken next_token = {.value = 1};
  31
  32 struct typed_event_handler_entry
  33 {
  34     struct list entry;
  35     EventRegistrationToken token;
  36     ITypedEventHandler_IInspectable_IInspectable *handler;
  37 };
  38
  39 HRESULT typed_event_handlers_append( struct list *list, ITypedEventHandler_IInspectable_IInspectable *handler, EventRegistrationToken *token )
  40 {
  41     struct typed_event_handler_entry *entry;
  42
  43     if (!(entry = calloc(1, sizeof(*entry)))) return E_OUTOFMEMORY;
  44     ITypedEventHandler_IInspectable_IInspectable_AddRef((entry->handler = handler));
  45
  46     EnterCriticalSection(&handlers_cs);
  47
  48     *token = entry->token = next_token;
  49     next_token.value++;
  50     list_add_tail(list, &entry->entry);
  51
  52     LeaveCriticalSection(&handlers_cs);
  53
  54     return S_OK;
  55 }
  56
  57 HRESULT typed_event_handlers_remove( struct list *list, EventRegistrationToken *token )
  58 {
  59     struct typed_event_handler_entry *entry;
  60     BOOL found = FALSE;
  61
  62     EnterCriticalSection(&handlers_cs);
  63
  64     LIST_FOR_EACH_ENTRY(entry, list, struct typed_event_handler_entry, entry)
  65         if ((found = !memcmp(&entry->token, token, sizeof(*token)))) break;
  66     if (found) list_remove(&entry->entry);
  67
  68     LeaveCriticalSection(&handlers_cs);
  69
  70     if (found)
  71     {
  72         ITypedEventHandler_IInspectable_IInspectable_Release(entry->handler);
  73         free(entry);
  74     }
  75
  76     return S_OK;
  77 }
  78
  79 HRESULT typed_event_handlers_notify( struct list *list, IInspectable *sender, IInspectable *args )
  80 {
  81     struct typed_event_handler_entry *entry;
  82
  83     EnterCriticalSection(&handlers_cs);
  84
  85     LIST_FOR_EACH_ENTRY(entry, list, struct typed_event_handler_entry, entry)
  86         ITypedEventHandler_IInspectable_IInspectable_Invoke(entry->handler, sender, args);
  87
  88     LeaveCriticalSection(&handlers_cs);
  89
  90     return S_OK;
  91 }
  92
  93 HRESULT typed_event_handlers_clear( struct list* list )
  94 {
  95     struct typed_event_handler_entry *entry, *entry_cursor2;
  96
  97     EnterCriticalSection(&handlers_cs);
  98
  99     LIST_FOR_EACH_ENTRY_SAFE(entry, entry_cursor2, list, struct typed_event_handler_entry, entry)
 100     {
 101         list_remove(&entry->entry);
 102         free(entry);
 103     }
 104
 105     LeaveCriticalSection(&handlers_cs);
 106
 107     return S_OK;
 108 }