window qtdrv.ui.dll load check

Author: visualfc

ui/app.go

@@ -4,6 +4,10 @@
 
 package ui
 
+import (
+	"log"
+)
+
 func Version() string {
 	return "0.1.1"
 }
@@ -14,6 +18,10 @@ func Async(fn func()) {
 }
 
 func Run(fn func()) int {
+	if qtdrv_init_error != nil {
+		log.Println(qtdrv_init_error)
+		return -2
+	}
 	app := NewQApplication(nil)
 	Async(func() {
 		fn()
@@ -22,6 +30,10 @@ func Run(fn func()) int {
 }
 
 func RunEx(args []string, fn func()) int {
+	if qtdrv_init_error != nil {
+		log.Println(qtdrv_init_error)
+		return -2
+	}
 	app := NewQApplication(args)
 	Async(func() {
 		fn()

ui/cdrv.go

@@ -66,6 +66,18 @@ var (
 	fnErrHandler func(error, int32, int32, int) = DefaultErrorHandler
 )
 
+var (
+	qtdrv_init_error error
+)
+
+func InitError() error {
+	return qtdrv_init_error
+}
+
+func IsLoaded() bool {
+	return qtdrv_init_error == nil
+}
+
 func (err Error) Error() string {
 	switch err {
 	case -1:
@@ -78,7 +90,7 @@ func (err Error) Error() string {
 	return "unknown error"
 }
 
-func init() {
+func cdrv_init() {
 	C.init()
 }
 

ui/cdrv_init.go

@@ -0,0 +1,11 @@
+// +build !windows
+
+// Copyright 2015-2016 visualfc <[email protected]>. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package ui
+
+func init() {
+	cdrv_init()
+}

ui/cdrv_windows.go

@@ -12,13 +12,31 @@ import (
 import "C"
 
 var (
-	qtdrv_lib       = syscall.NewLazyDLL("qtdrv.ui.dll")
-	proc_qtdrv      = qtdrv_lib.NewProc("qtdrv")
-	proc_qtdrv_addr = proc_qtdrv.Addr()
+	proc_qtdrv_addr uintptr = 0
 )
 
 //export qtdrv
 func qtdrv(p unsafe.Pointer, typeid, funcid C.int, p1, p2, p3, p4, p5, p6, p7, p8, p9, p10, p11, p12 unsafe.Pointer) C.int {
 	r0, _, _ := syscall.Syscall15(proc_qtdrv_addr, 15, uintptr(p), uintptr(typeid), uintptr(funcid), uintptr(p1), uintptr(p2), uintptr(p3), uintptr(p4), uintptr(p5), uintptr(p6), uintptr(p7), uintptr(p8), uintptr(p9), uintptr(p10), uintptr(p11), uintptr(p12))
 	return C.int(r0)
 }
+
+func load_qtdrv_proc() (uintptr, error) {
+	lib, err := syscall.LoadDLL("qtdrv.ui.dll")
+	if err != nil {
+		return 0, err
+	}
+	proc, err := lib.FindProc("qtdrv")
+	if err != nil {
+		return 0, err
+	}
+	return proc.Addr(), nil
+}
+
+func init() {
+	proc_qtdrv_addr, qtdrv_init_error = load_qtdrv_proc()
+	if qtdrv_init_error != nil {
+		return
+	}
+	cdrv_init()
+}