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/* window.cc: hidden windows for signals/itimer support
Written by Sergey Okhapkin <sos@prospect.com.ru>
This file is part of Cygwin.
This software is a copyrighted work licensed under the terms of the
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
#include "winsup.h"
#include <sys/time.h>
#define USE_SYS_TYPES_FD_SET
#include <winsock2.h>
#include "perprocess.h"
#include "cygtls.h"
#include "sync.h"
#include "wininfo.h"
wininfo NO_COPY winmsg;
muto NO_COPY wininfo::_lock;
int
wininfo::process (HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
#ifndef NOSTRACE
strace.wm (uMsg, wParam, lParam);
#endif
switch (uMsg)
{
case WM_PAINT:
return 0;
case WM_DESTROY:
PostQuitMessage (0);
return 0;
case WM_ASYNCIO:
if (WSAGETSELECTEVENT (lParam) == FD_OOB)
raise (SIGURG);
else
raise (SIGIO);
return 0;
default:
return DefWindowProcW (hwnd, uMsg, wParam, lParam);
}
}
static LRESULT CALLBACK
process_window_events (HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
return winmsg.process (hwnd, uMsg, wParam, lParam);
}
/* Handle windows events. Inherits ownership of the wininfo lock */
DWORD
wininfo::winthread ()
{
MSG msg;
WNDCLASSW wc;
static NO_COPY WCHAR classname[] = L"CygwinWndClass";
_lock.grab ();
/* Register the window class for the main window. */
wc.style = 0;
wc.lpfnWndProc = (WNDPROC) process_window_events;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = user_data->hmodule;
wc.hIcon = NULL;
wc.hCursor = NULL;
wc.hbrBackground = NULL;
wc.lpszMenuName = NULL;
wc.lpszClassName = classname;
if (!RegisterClassW (&wc))
api_fatal ("cannot register window class, %E");
/* Create hidden window. */
hwnd = CreateWindowExW (0, classname, classname, WS_POPUP, CW_USEDEFAULT,
CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
(HWND) NULL, (HMENU) NULL, user_data->hmodule,
(LPVOID) NULL);
if (!hwnd)
api_fatal ("couldn't create window, %E");
release ();
int ret;
while ((ret = (int) GetMessageW (&msg, hwnd, 0, 0)) > 0)
DispatchMessageW (&msg);
return 0;
}
static DWORD
winthread (VOID *arg)
{
return ((wininfo *) arg)->winthread ();
}
wininfo::operator
HWND ()
{
if (hwnd)
return hwnd;
lock ();
if (!hwnd)
{
_lock.upforgrabs ();
cygthread *h = new cygthread (::winthread, this, "win");
h->SetThreadPriority (THREAD_PRIORITY_HIGHEST);
h->zap_h ();
lock ();
}
release ();
return hwnd;
}
void
wininfo::lock ()
{
_lock.init ("wininfo_lock")->acquire ();
}
void
wininfo::release ()
{
_lock.release ();
}
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