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