panic when an extension request is issued before an extension has been initialized. but give a nice error message for the happy people.

1 files changed, 43 insertions, 7 deletions

diff --git a/nexgb/shm/shm.go b/nexgb/shm/shm.go
index 6ae886d..ac53579 100644
--- a/nexgb/shm/shm.go
+++ b/nexgb/shm/shm.go
@@ -2,7 +2,7 @@
 package shm
 
 /*
-	This file was generated by shm.xml on May 11 2012 1:58:36am EDT.
+	This file was generated by shm.xml on May 11 2012 11:57:19pm EDT.
 	This file is automatically generated. Edit at your peril!
 */
 
@@ -40,6 +40,12 @@ func init() {
 	xgb.NewExtErrorFuncs["MIT-SHM"] = make(map[int]xgb.NewErrorFun)
 }
 
+// Skipping definition for base type 'Int32'
+
+// Skipping definition for base type 'Void'
+
+// Skipping definition for base type 'Byte'
+
 // Skipping definition for base type 'Int8'
 
 // Skipping definition for base type 'Card16'
@@ -58,12 +64,6 @@ func init() {
 
 // Skipping definition for base type 'Int16'
 
-// Skipping definition for base type 'Int32'
-
-// Skipping definition for base type 'Void'
-
-// Skipping definition for base type 'Byte'
-
 type Seg uint32
 
 func NewSegId(c *xgb.Conn) (Seg, error) {
@@ -220,6 +220,9 @@ type QueryVersionCookie struct {
 // QueryVersion sends a checked request.
 // If an error occurs, it will be returned with the reply by calling QueryVersionCookie.Reply()
 func QueryVersion(c *xgb.Conn) QueryVersionCookie {
+	if _, ok := c.Extensions["MIT-SHM"]; !ok {
+		panic("Cannot issue request 'QueryVersion' using the uninitialized extension 'MIT-SHM'. shm.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(queryVersionRequest(c), cookie)
 	return QueryVersionCookie{cookie}
@@ -228,6 +231,9 @@ func QueryVersion(c *xgb.Conn) QueryVersionCookie {
 // QueryVersionUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func QueryVersionUnchecked(c *xgb.Conn) QueryVersionCookie {
+	if _, ok := c.Extensions["MIT-SHM"]; !ok {
+		panic("Cannot issue request 'QueryVersion' using the uninitialized extension 'MIT-SHM'. shm.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(queryVersionRequest(c), cookie)
 	return QueryVersionCookie{cookie}
@@ -323,6 +329,9 @@ type AttachCookie struct {
 // Attach sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func Attach(c *xgb.Conn, Shmseg Seg, Shmid uint32, ReadOnly bool) AttachCookie {
+	if _, ok := c.Extensions["MIT-SHM"]; !ok {
+		panic("Cannot issue request 'Attach' using the uninitialized extension 'MIT-SHM'. shm.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(attachRequest(c, Shmseg, Shmid, ReadOnly), cookie)
 	return AttachCookie{cookie}
@@ -331,6 +340,9 @@ func Attach(c *xgb.Conn, Shmseg Seg, Shmid uint32, ReadOnly bool) AttachCookie {
 // AttachChecked sends a checked request.
 // If an error occurs, it can be retrieved using AttachCookie.Check()
 func AttachChecked(c *xgb.Conn, Shmseg Seg, Shmid uint32, ReadOnly bool) AttachCookie {
+	if _, ok := c.Extensions["MIT-SHM"]; !ok {
+		panic("Cannot issue request 'Attach' using the uninitialized extension 'MIT-SHM'. shm.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(attachRequest(c, Shmseg, Shmid, ReadOnly), cookie)
 	return AttachCookie{cookie}
@@ -384,6 +396,9 @@ type DetachCookie struct {
 // Detach sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func Detach(c *xgb.Conn, Shmseg Seg) DetachCookie {
+	if _, ok := c.Extensions["MIT-SHM"]; !ok {
+		panic("Cannot issue request 'Detach' using the uninitialized extension 'MIT-SHM'. shm.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(detachRequest(c, Shmseg), cookie)
 	return DetachCookie{cookie}
@@ -392,6 +407,9 @@ func Detach(c *xgb.Conn, Shmseg Seg) DetachCookie {
 // DetachChecked sends a checked request.
 // If an error occurs, it can be retrieved using DetachCookie.Check()
 func DetachChecked(c *xgb.Conn, Shmseg Seg) DetachCookie {
+	if _, ok := c.Extensions["MIT-SHM"]; !ok {
+		panic("Cannot issue request 'Detach' using the uninitialized extension 'MIT-SHM'. shm.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(detachRequest(c, Shmseg), cookie)
 	return DetachCookie{cookie}
@@ -433,6 +451,9 @@ type PutImageCookie struct {
 // PutImage sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func PutImage(c *xgb.Conn, Drawable xproto.Drawable, Gc xproto.Gcontext, TotalWidth uint16, TotalHeight uint16, SrcX uint16, SrcY uint16, SrcWidth uint16, SrcHeight uint16, DstX int16, DstY int16, Depth byte, Format byte, SendEvent byte, Shmseg Seg, Offset uint32) PutImageCookie {
+	if _, ok := c.Extensions["MIT-SHM"]; !ok {
+		panic("Cannot issue request 'PutImage' using the uninitialized extension 'MIT-SHM'. shm.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(putImageRequest(c, Drawable, Gc, TotalWidth, TotalHeight, SrcX, SrcY, SrcWidth, SrcHeight, DstX, DstY, Depth, Format, SendEvent, Shmseg, Offset), cookie)
 	return PutImageCookie{cookie}
@@ -441,6 +462,9 @@ func PutImage(c *xgb.Conn, Drawable xproto.Drawable, Gc xproto.Gcontext, TotalWi
 // PutImageChecked sends a checked request.
 // If an error occurs, it can be retrieved using PutImageCookie.Check()
 func PutImageChecked(c *xgb.Conn, Drawable xproto.Drawable, Gc xproto.Gcontext, TotalWidth uint16, TotalHeight uint16, SrcX uint16, SrcY uint16, SrcWidth uint16, SrcHeight uint16, DstX int16, DstY int16, Depth byte, Format byte, SendEvent byte, Shmseg Seg, Offset uint32) PutImageCookie {
+	if _, ok := c.Extensions["MIT-SHM"]; !ok {
+		panic("Cannot issue request 'PutImage' using the uninitialized extension 'MIT-SHM'. shm.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(putImageRequest(c, Drawable, Gc, TotalWidth, TotalHeight, SrcX, SrcY, SrcWidth, SrcHeight, DstX, DstY, Depth, Format, SendEvent, Shmseg, Offset), cookie)
 	return PutImageCookie{cookie}
@@ -526,6 +550,9 @@ type GetImageCookie struct {
 // GetImage sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetImageCookie.Reply()
 func GetImage(c *xgb.Conn, Drawable xproto.Drawable, X int16, Y int16, Width uint16, Height uint16, PlaneMask uint32, Format byte, Shmseg Seg, Offset uint32) GetImageCookie {
+	if _, ok := c.Extensions["MIT-SHM"]; !ok {
+		panic("Cannot issue request 'GetImage' using the uninitialized extension 'MIT-SHM'. shm.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getImageRequest(c, Drawable, X, Y, Width, Height, PlaneMask, Format, Shmseg, Offset), cookie)
 	return GetImageCookie{cookie}
@@ -534,6 +561,9 @@ func GetImage(c *xgb.Conn, Drawable xproto.Drawable, X int16, Y int16, Width uin
 // GetImageUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetImageUnchecked(c *xgb.Conn, Drawable xproto.Drawable, X int16, Y int16, Width uint16, Height uint16, PlaneMask uint32, Format byte, Shmseg Seg, Offset uint32) GetImageCookie {
+	if _, ok := c.Extensions["MIT-SHM"]; !ok {
+		panic("Cannot issue request 'GetImage' using the uninitialized extension 'MIT-SHM'. shm.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getImageRequest(c, Drawable, X, Y, Width, Height, PlaneMask, Format, Shmseg, Offset), cookie)
 	return GetImageCookie{cookie}
@@ -639,6 +669,9 @@ type CreatePixmapCookie struct {
 // CreatePixmap sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func CreatePixmap(c *xgb.Conn, Pid xproto.Pixmap, Drawable xproto.Drawable, Width uint16, Height uint16, Depth byte, Shmseg Seg, Offset uint32) CreatePixmapCookie {
+	if _, ok := c.Extensions["MIT-SHM"]; !ok {
+		panic("Cannot issue request 'CreatePixmap' using the uninitialized extension 'MIT-SHM'. shm.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(createPixmapRequest(c, Pid, Drawable, Width, Height, Depth, Shmseg, Offset), cookie)
 	return CreatePixmapCookie{cookie}
@@ -647,6 +680,9 @@ func CreatePixmap(c *xgb.Conn, Pid xproto.Pixmap, Drawable xproto.Drawable, Widt
 // CreatePixmapChecked sends a checked request.
 // If an error occurs, it can be retrieved using CreatePixmapCookie.Check()
 func CreatePixmapChecked(c *xgb.Conn, Pid xproto.Pixmap, Drawable xproto.Drawable, Width uint16, Height uint16, Depth byte, Shmseg Seg, Offset uint32) CreatePixmapCookie {
+	if _, ok := c.Extensions["MIT-SHM"]; !ok {
+		panic("Cannot issue request 'CreatePixmap' using the uninitialized extension 'MIT-SHM'. shm.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(createPixmapRequest(c, Pid, Drawable, Width, Height, Depth, Shmseg, Offset), cookie)
 	return CreatePixmapCookie{cookie}