131 lines
2.6 KiB
C++
131 lines
2.6 KiB
C++
/* window.cc: hidden windows for signals/itimer support
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Written by Sergey Okhapkin <sos@prospect.com.ru>
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This file is part of Cygwin.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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#include "winsup.h"
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#include <sys/time.h>
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#define USE_SYS_TYPES_FD_SET
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#include <winsock2.h>
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#include "perprocess.h"
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#include "cygtls.h"
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#include "sync.h"
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#include "wininfo.h"
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wininfo NO_COPY winmsg;
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muto NO_COPY wininfo::_lock;
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int __reg3
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wininfo::process (HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
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{
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#ifndef NOSTRACE
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strace.wm (uMsg, wParam, lParam);
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#endif
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switch (uMsg)
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{
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case WM_PAINT:
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return 0;
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case WM_DESTROY:
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PostQuitMessage (0);
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return 0;
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case WM_ASYNCIO:
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if (WSAGETSELECTEVENT (lParam) == FD_OOB)
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raise (SIGURG);
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else
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raise (SIGIO);
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return 0;
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default:
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return DefWindowProcW (hwnd, uMsg, wParam, lParam);
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}
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}
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static LRESULT CALLBACK
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process_window_events (HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
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{
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return winmsg.process (hwnd, uMsg, wParam, lParam);
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}
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/* Handle windows events. Inherits ownership of the wininfo lock */
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DWORD __reg1 WINAPI
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wininfo::winthread ()
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{
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MSG msg;
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WNDCLASSW wc;
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static NO_COPY WCHAR classname[] = L"CygwinWndClass";
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_lock.grab ();
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/* Register the window class for the main window. */
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wc.style = 0;
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wc.lpfnWndProc = (WNDPROC) process_window_events;
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wc.cbClsExtra = 0;
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wc.cbWndExtra = 0;
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wc.hInstance = user_data->hmodule;
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wc.hIcon = NULL;
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wc.hCursor = NULL;
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wc.hbrBackground = NULL;
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wc.lpszMenuName = NULL;
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wc.lpszClassName = classname;
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if (!RegisterClassW (&wc))
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api_fatal ("cannot register window class, %E");
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/* Create hidden window. */
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hwnd = CreateWindowExW (0, classname, classname, WS_POPUP, CW_USEDEFAULT,
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CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
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(HWND) NULL, (HMENU) NULL, user_data->hmodule,
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(LPVOID) NULL);
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if (!hwnd)
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api_fatal ("couldn't create window, %E");
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release ();
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int ret;
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while ((ret = (int) GetMessageW (&msg, hwnd, 0, 0)) > 0)
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DispatchMessageW (&msg);
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return 0;
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}
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static DWORD WINAPI
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winthread (VOID *arg)
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{
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return ((wininfo *) arg)->winthread ();
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}
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wininfo::operator
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HWND ()
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{
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if (hwnd)
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return hwnd;
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lock ();
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if (!hwnd)
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{
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_lock.upforgrabs ();
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cygthread *h = new cygthread (::winthread, this, "win");
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h->SetThreadPriority (THREAD_PRIORITY_HIGHEST);
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h->zap_h ();
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lock ();
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}
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release ();
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return hwnd;
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}
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void
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wininfo::lock ()
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{
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_lock.init ("wininfo_lock")->acquire ();
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}
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void
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wininfo::release ()
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{
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_lock.release ();
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}
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