85 lines
1.4 KiB
Go
85 lines
1.4 KiB
Go
// 11 february 2014
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package main
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import (
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"syscall"
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"unsafe"
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"runtime"
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)
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var uitask chan *uimsg
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type uimsg struct {
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call *syscall.LazyProc
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p []uintptr
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ret chan uiret
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}
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type uiret struct {
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ret uintptr
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err error
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}
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func ui(initDone chan error) {
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runtime.LockOSThread()
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uitask = make(chan *uimsg)
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initDone <- doWindowsInit()
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quit := false
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for !quit {
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select {
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case m := <-uitask:
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r1, _, err := m.call.Call(m.p...)
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m.ret <- uiret{
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ret: r1,
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err: err,
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}
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default:
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quit = msgloopstep()
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}
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}
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}
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const (
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_PM_REMOVE = 0x0001
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)
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var (
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_dispatchMessage = user32.NewProc("DispatchMessageW")
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_getMessage = user32.NewProc("GetMessageW")
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_peekMessage = user32.NewProc("PeekMessageW")
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_postQuitMessage = user32.NewProc("PostQuitMessage")
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_sendMessage = user32.NewProc("SendMessageW")
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_translateMessage = user32.NewProc("TranslateMessage")
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)
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var getMessageFail = -1 // because Go doesn't let me
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func msgloopstep() (quit bool) {
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var msg struct {
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Hwnd _HWND
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Message uint32
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WParam _WPARAM
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LParam _LPARAM
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Time uint32
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Pt _POINT
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}
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r1, _, _ := _peekMessage.Call(
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uintptr(unsafe.Pointer(&msg)),
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uintptr(_NULL),
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uintptr(0),
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uintptr(0),
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uintptr(_PM_REMOVE))
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if r1 == 0 { // no message available
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return false
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}
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if msg.Message == _WM_QUIT {
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return true
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}
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_translateMessage.Call(uintptr(unsafe.Pointer(&msg)))
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_dispatchMessage.Call(uintptr(unsafe.Pointer(&msg)))
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return false
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}
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