source/io/windows/poll.cpp

   1 #include <msp/core/systemerror.h>
   2 #include "eventobject.h"
   3 #include "handle.h"
   4 #include "handle_private.h"
   5 #include "poll.h"
   6 #include "poll_platform.h"
   7
   8 using namespace std;
   9
  10 namespace Msp {
  11 namespace IO {
  12
  13 void Poller::rebuild_array()
  14 {
  15         if(!objs_changed)
  16                 return;
  17
  18         priv->handles.clear();
  19         priv->handles.reserve(objects.size());
  20
  21         for(const PolledObject &po: objects)
  22                 priv->handles.push_back(*po.object->get_event_handle());
  23 }
  24
  25 void Poller::platform_poll(int timeout)
  26 {
  27         if(timeout<0)
  28                 timeout = INFINITE;
  29
  30         DWORD ret = WaitForMultipleObjects(priv->handles.size(), &priv->handles.front(), false, timeout);
  31         if(/*ret>=WAIT_OBJECT_0 &&*/ ret<WAIT_OBJECT_0+priv->handles.size())
  32         {
  33                 const PolledObject &obj = objects[ret-WAIT_OBJECT_0];
  34                 poll_result.push_back(obj);
  35         }
  36         else if(ret==WAIT_FAILED)
  37                 throw system_error("WaitForMultipleObjects");
  38 }
  39
  40
  41 PollEvent platform_poll(EventObject &obj, PollEvent pe, int timeout)
  42 {
  43         if(timeout<0)
  44                 timeout = INFINITE;
  45
  46         DWORD ret = WaitForSingleObject(*obj.get_event_handle(), timeout);
  47         if(ret==WAIT_OBJECT_0)
  48                 return pe;
  49         else if(ret==WAIT_FAILED)
  50                 throw system_error("WaitForSingleObject");
  51
  52         return P_NONE;
  53 }
  54
  55 } // namespace IO
  56 } // namespace Msp