xace: typesafe hook function for XACE_SCREEN_ACCESS

he generic XaceHook() call isn't typesafe (und unnecessarily slow).
Better add an explicit function, just like we already have for others.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1556>

5 files changed, 15 insertions, 11 deletions

diff --git a/Xext/xace.c b/Xext/xace.c
index 9c5e9ddd4..847f14328 100644
--- a/Xext/xace.c
+++ b/Xext/xace.c
@@ -115,6 +115,13 @@ int XaceHookServerAccess(ClientPtr client, Mask access_mode)
     return rec.status;
 }
 
+int XaceHookScreenAccess(ClientPtr client, ScreenPtr screen, Mask access_mode)
+{
+    XaceScreenAccessRec rec = { client, screen, access_mode, Success };
+    CallCallbacks(&XaceHooks[XACE_SCREEN_ACCESS], &rec);
+    return rec.status;
+}
+
 /* Entry point for hook functions.  Called by Xserver.
  */
 int
@@ -139,7 +146,6 @@ XaceHook(int hook, ...)
      * sets calldata directly to a single argument (with no return result)
      */
     switch (hook) {
-    case XACE_SCREEN_ACCESS:
     case XACE_SCREENSAVER_ACCESS:
         u.screen.client = va_arg(ap, ClientPtr);
         u.screen.screen = va_arg(ap, ScreenPtr);
diff --git a/Xext/xace.h b/Xext/xace.h
index 0de4a6355..8404fb736 100644
--- a/Xext/xace.h
+++ b/Xext/xace.h
@@ -91,6 +91,7 @@ int XaceHookReceiveAccess(ClientPtr client, WindowPtr win, xEventPtr ev, int cou
 int XaceHookClientAccess(ClientPtr client, ClientPtr target, Mask access_mode);
 int XaceHookExtAccess(ClientPtr client, ExtensionEntry *ext);
 int XaceHookServerAccess(ClientPtr client, Mask access_mode);
+int XaceHookScreenAccess(ClientPtr client, ScreenPtr screen, Mask access_mode);
 
 
 /* Register a callback for a given hook.
diff --git a/dbe/dbe.c b/dbe/dbe.c
index b9f6690a6..29cac9533 100644
--- a/dbe/dbe.c
+++ b/dbe/dbe.c
@@ -614,7 +614,7 @@ ProcDbeGetVisualInfo(ClientPtr client)
             pDrawables[i]->pScreen;
         pDbeScreenPriv = DBE_SCREEN_PRIV(pScreen);
 
-        rc = XaceHook(XACE_SCREEN_ACCESS, client, pScreen, DixGetAttrAccess);
+        rc = XaceHookScreenAccess(client, pScreen, DixGetAttrAccess);
         if (rc != Success)
             goto freeScrVisInfo;
 
diff --git a/dix/dispatch.c b/dix/dispatch.c
index 290534618..266f5f89f 100644
--- a/dix/dispatch.c
+++ b/dix/dispatch.c
@@ -2523,7 +2523,7 @@ ProcInstallColormap(ClientPtr client)
     if (rc != Success)
         goto out;
 
-    rc = XaceHook(XACE_SCREEN_ACCESS, client, pcmp->pScreen, DixSetAttrAccess);
+    rc = XaceHookScreenAccess(client, pcmp->pScreen, DixSetAttrAccess);
     if (rc != Success) {
         if (rc == BadValue)
             rc = BadColor;
@@ -2552,7 +2552,7 @@ ProcUninstallColormap(ClientPtr client)
     if (rc != Success)
         goto out;
 
-    rc = XaceHook(XACE_SCREEN_ACCESS, client, pcmp->pScreen, DixSetAttrAccess);
+    rc = XaceHookScreenAccess(client, pcmp->pScreen, DixSetAttrAccess);
     if (rc != Success) {
         if (rc == BadValue)
             rc = BadColor;
@@ -2582,8 +2582,7 @@ ProcListInstalledColormaps(ClientPtr client)
     if (rc != Success)
         return rc;
 
-    rc = XaceHook(XACE_SCREEN_ACCESS, client, pWin->drawable.pScreen,
-                  DixGetAttrAccess);
+    rc = XaceHookScreenAccess(client, pWin->drawable.pScreen, DixGetAttrAccess);
     if (rc != Success)
         return rc;
 
@@ -3154,7 +3153,7 @@ ProcQueryBestSize(ClientPtr client)
     if (stuff->class != CursorShape && pDraw->type == UNDRAWABLE_WINDOW)
         return BadMatch;
     pScreen = pDraw->pScreen;
-    rc = XaceHook(XACE_SCREEN_ACCESS, client, pScreen, DixGetAttrAccess);
+    rc = XaceHookScreenAccess(client, pScreen, DixGetAttrAccess);
     if (rc != Success)
         return rc;
     (*pScreen->QueryBestSize) (stuff->class, &stuff->width,
diff --git a/xfixes/cursor.c b/xfixes/cursor.c
index 85aa272a7..8f4752d61 100644
--- a/xfixes/cursor.c
+++ b/xfixes/cursor.c
@@ -880,8 +880,7 @@ ProcXFixesHideCursor(ClientPtr client)
      * This is the first time this client has hid the cursor
      * for this screen.
      */
-    ret = XaceHook(XACE_SCREEN_ACCESS, client, pWin->drawable.pScreen,
-                   DixHideAccess);
+    ret = XaceHookScreenAccess(client, pWin->drawable.pScreen, DixHideAccess);
     if (ret != Success)
         return ret;
 
@@ -938,8 +937,7 @@ ProcXFixesShowCursor(ClientPtr client)
         return BadMatch;
     }
 
-    rc = XaceHook(XACE_SCREEN_ACCESS, client, pWin->drawable.pScreen,
-                  DixShowAccess);
+    rc = XaceHookScreenAccess(client, pWin->drawable.pScreen, DixShowAccess);
     if (rc != Success)
         return rc;