1 /* Copyright libuv project contributors. All rights reserved.
2 *
3 * Permission is hereby granted, free of charge, to any person obtaining a copy
4 * of this software and associated documentation files (the "Software"), to
5 * deal in the Software without restriction, including without limitation the
6 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
7 * sell copies of the Software, and to permit persons to whom the Software is
8 * furnished to do so, subject to the following conditions:
9 *
10 * The above copyright notice and this permission notice shall be included in
11 * all copies or substantial portions of the Software.
12 *
13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
16 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
17 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
18 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
19 * IN THE SOFTWARE.
20 */
21
22 #include "uv.h"
23 #include "internal.h"
24 #include "winapi.h"
25
26 static void uv__register_system_resume_callback(void);
27
uv__init_detect_system_wakeup(void)28 void uv__init_detect_system_wakeup(void) {
29 /* Try registering system power event callback. This is the cleanest
30 * method, but it will only work on Win8 and above.
31 */
32 uv__register_system_resume_callback();
33 }
34
uv__system_resume_callback(PVOID Context,ULONG Type,PVOID Setting)35 static ULONG CALLBACK uv__system_resume_callback(PVOID Context,
36 ULONG Type,
37 PVOID Setting) {
38 if (Type == PBT_APMRESUMESUSPEND || Type == PBT_APMRESUMEAUTOMATIC)
39 uv__wake_all_loops();
40
41 return 0;
42 }
43
uv__register_system_resume_callback(void)44 static void uv__register_system_resume_callback(void) {
45 _DEVICE_NOTIFY_SUBSCRIBE_PARAMETERS recipient;
46 _HPOWERNOTIFY registration_handle;
47
48 if (pPowerRegisterSuspendResumeNotification == NULL)
49 return;
50
51 recipient.Callback = uv__system_resume_callback;
52 recipient.Context = NULL;
53 (*pPowerRegisterSuspendResumeNotification)(DEVICE_NOTIFY_CALLBACK,
54 &recipient,
55 ®istration_handle);
56 }
57