#include "uv.h"

#include "internal.h"

#include "winapi.h"

static void uv__register_system_resume_callback(void);

void uv__init_detect_system_wakeup(void) {

  /* Try registering system power event callback. This is the cleanest

   * method, but it will only work on Win8 and above.

   */

  uv__register_system_resume_callback();

}

static ULONG CALLBACK uv__system_resume_callback(PVOID Context,

                                                 ULONG Type,

                                                 PVOID Setting) {

  if (Type == PBT_APMRESUMESUSPEND || Type == PBT_APMRESUMEAUTOMATIC)

    uv__wake_all_loops();

  return 0;

}

static void uv__register_system_resume_callback(void) {

  _DEVICE_NOTIFY_SUBSCRIBE_PARAMETERS recipient;

  _HPOWERNOTIFY registration_handle;

  if (pPowerRegisterSuspendResumeNotification == NULL)

    return;

  recipient.Callback = uv__system_resume_callback;

  recipient.Context = NULL;

  (*pPowerRegisterSuspendResumeNotification)(DEVICE_NOTIFY_CALLBACK,

                                             &recipient,

                                             &registration_handle);

}