Remove the Must_have_memory hack.

Also remove an astonishing amount of misunderstanding of how casts work.

dix/events.c

@@ -2640,11 +2640,8 @@ XYToWindow(DeviceIntPtr pDev, int x, int y)
 	    if (pSprite->spriteTraceGood >= pSprite->spriteTraceSize)
 	    {
 		pSprite->spriteTraceSize += 10;
-		Must_have_memory = TRUE; /* XXX */
+		pSprite->spriteTrace = xrealloc(pSprite->spriteTrace,
-		pSprite->spriteTrace = (WindowPtr *)xrealloc(
-		                    pSprite->spriteTrace,
 		                    pSprite->spriteTraceSize*sizeof(WindowPtr));
-		Must_have_memory = FALSE; /* XXX */
 	    }
 	    pSprite->spriteTrace[pSprite->spriteTraceGood++] = pWin;
 	    pWin = pWin->firstChild;
@@ -3462,11 +3459,8 @@ CheckPassiveGrabsOnWindow(
 	    {
 		if (grabinfo->sync.evcount < scount)
 		{
-		    Must_have_memory = TRUE; /* XXX */
+		    grabinfo->sync.event = xrealloc(grabinfo->sync.event,
-		    grabinfo->sync.event = (xEvent *)xrealloc(grabinfo->sync.event,
+						    scount * sizeof(xEvent));
-							    scount*
-							    sizeof(xEvent));
-		    Must_have_memory = FALSE; /* XXX */
 		}
 		grabinfo->sync.evcount = scount;
                 /* we always store the XI event, never the core event */
@@ -3792,10 +3786,8 @@ DeliverGrabbedEvent(xEvent *xE, DeviceIntPtr thisDev,
 	    FreezeThaw(thisDev, TRUE);
 	    if (grabinfo->sync.evcount < count)
 	    {
-		Must_have_memory = TRUE; /* XXX */
+		grabinfo->sync.event = xrealloc(grabinfo->sync.event,
-		grabinfo->sync.event = (xEvent *)xrealloc(grabinfo->sync.event,
 						count * sizeof(xEvent));
-		Must_have_memory = FALSE; /* XXX */
 	    }
 	    grabinfo->sync.evcount = count;
 	    for (dxE = grabinfo->sync.event; --count >= 0; dxE++, xE++)
@@ -4953,11 +4945,8 @@ SetInputFocus(
         if (depth > focus->traceSize)
         {
 	    focus->traceSize = depth+1;
-	    Must_have_memory = TRUE; /* XXX */
+	    focus->trace = xrealloc(focus->trace,
-	    focus->trace = (WindowPtr *)xrealloc(focus->trace,
+				    focus->traceSize * sizeof(WindowPtr));
-						 focus->traceSize *
-						 sizeof(WindowPtr));
-	    Must_have_memory = FALSE; /* XXX */
 	}
 	focus->traceGood = depth;
         for (pWin = focusWin, depth--; pWin; pWin = pWin->parent, depth--)

hw/xfree86/loader/dixsym.c

@@ -333,7 +333,6 @@ _X_HIDDEN void *dixLookupTab[] = {
     /* utils.c */
     SYMFUNC(Xstrdup)
     SYMFUNC(XNFstrdup)
-    SYMVAR(Must_have_memory)
     SYMFUNC(AdjustWaitForDelay)
     SYMVAR(noTestExtensions)
     SYMFUNC(GiveUp)

include/globals.h

@@ -19,7 +19,6 @@ extern char *defaultFontPath;
 extern int monitorResolution;
 extern int defaultColorVisualClass;
 
-extern Bool Must_have_memory;
 extern WindowPtr WindowTable[MAXSCREENS];
 extern int GrabInProgress;
 extern Bool noTestExtensions;

mi/micursor.c

@@ -54,8 +54,6 @@ SOFTWARE.
 #include "mi.h"
 #include "inputstr.h"
 
-extern Bool Must_have_memory;
-
 _X_EXPORT void
 miRecolorCursor(DeviceIntPtr pDev, ScreenPtr pScr,
                 CursorPtr pCurs, Bool displayed)
@@ -64,11 +62,8 @@ miRecolorCursor(DeviceIntPtr pDev, ScreenPtr pScr,
      * This is guaranteed to correct any color-dependent state which may have
      * been bound up in private state created by RealizeCursor
      */
-    (* pScr->UnrealizeCursor)( pDev, pScr, pCurs);
+    pScr->UnrealizeCursor(pDev, pScr, pCurs);
-    Must_have_memory = TRUE; /* XXX */
+    pScr->RealizeCursor(pDev, pScr, pCurs);
-    (* pScr->RealizeCursor)( pDev, pScr, pCurs);
-    Must_have_memory = FALSE; /* XXX */
     if (displayed)
-	(* pScr->DisplayCursor)( pDev, pScr, pCurs);
+	pScr->DisplayCursor(pDev, pScr, pCurs);
-
 }

mi/migc.c

@@ -63,11 +63,9 @@ miCreateGCOps(GCOpsPtr prototype)
 {
     GCOpsPtr        ret;
 
-     /* XXX */ Must_have_memory = TRUE;
+    ret = xalloc(sizeof(GCOps));
-    ret = (GCOpsPtr) xalloc(sizeof(GCOps));
-     /* XXX */ Must_have_memory = FALSE;
     if (!ret)
-	return 0;
+	return NULL;
     *ret = *prototype;
     ret->devPrivate.val = 1;
     return ret;

os/utils.c

@@ -212,9 +212,6 @@ Bool PanoramiXExtensionDisabledHack = FALSE;
 
 int auditTrailLevel = 1;
 
-_X_EXPORT Bool Must_have_memory = FALSE;
-
-
 #if defined(SVR4) || defined(__linux__) || defined(CSRG_BASED)
 #define HAS_SAVED_IDS_AND_SETEUID
 #endif
@@ -1056,60 +1053,40 @@ set_font_authorizations(char **authorizations, int *authlen, pointer client)
 #endif /* TCPCONN */
 }
 
-/* XALLOC -- X's internal memory allocator.  Why does it return unsigned
- * long * instead of the more common char *?  Well, if you read K&R you'll
- * see they say that alloc must return a pointer "suitable for conversion"
- * to whatever type you really want.  In a full-blown generic allocator
- * there's no way to solve the alignment problems without potentially
- * wasting lots of space.  But we have a more limited problem. We know
- * we're only ever returning pointers to structures which will have to
- * be long word aligned.  So we are making a stronger guarantee.  It might
- * have made sense to make Xalloc return char * to conform with people's
- * expectations of malloc, but this makes lint happier.
- */
-
 #ifndef INTERNAL_MALLOC
 
 _X_EXPORT void * 
 Xalloc(unsigned long amount)
 {
-    register pointer  ptr;
+    void *ptr;
 
     if ((long)amount <= 0) {
-	return (unsigned long *)NULL;
+	return NULL;
     }
     /* aligned extra on long word boundary */
     amount = (amount + (sizeof(long) - 1)) & ~(sizeof(long) - 1);
-    if ((ptr = (pointer)malloc(amount))) {
+    ptr = malloc(amount);
-	return (unsigned long *)ptr;
+    return ptr;
-    }
-    if (Must_have_memory)
-	FatalError("Out of memory");
-    return (unsigned long *)NULL;
 }
 
 /*****************
  * XNFalloc 
- * "no failure" realloc, alternate interface to Xalloc w/o Must_have_memory
+ * "no failure" realloc
  *****************/
 
 _X_EXPORT void *
 XNFalloc(unsigned long amount)
 {
-    register pointer ptr;
+    void *ptr;
 
     if ((long)amount <= 0)
-    {
+        return NULL;
-        return (unsigned long *)NULL;
-    }
     /* aligned extra on long word boundary */
     amount = (amount + (sizeof(long) - 1)) & ~(sizeof(long) - 1);
-    ptr = (pointer)malloc(amount);
+    ptr = malloc(amount);
     if (!ptr)
-    {
         FatalError("Out of memory");
-    }
+    return ptr;
-    return ((unsigned long *)ptr);
 }
 
 /*****************
@@ -1119,11 +1096,11 @@ XNFalloc(unsigned long amount)
 _X_EXPORT void *
 Xcalloc(unsigned long amount)
 {
-    unsigned long   *ret;
+    void *ret;
 
     ret = Xalloc (amount);
     if (ret)
-	bzero ((char *) ret, (int) amount);
+	bzero (ret, (int) amount);
     return ret;
 }
 
@@ -1134,11 +1111,11 @@ Xcalloc(unsigned long amount)
 _X_EXPORT void *
 XNFcalloc(unsigned long amount)
 {
-    unsigned long   *ret;
+    void *ret;
 
     ret = Xalloc (amount);
     if (ret)
-	bzero ((char *) ret, (int) amount);
+	bzero (ret, (int) amount);
     else if ((long)amount > 0)
         FatalError("Out of memory");
     return ret;
@@ -1155,34 +1132,31 @@ Xrealloc(pointer ptr, unsigned long amount)
     {
 	if (ptr && !amount)
 	    free(ptr);
-	return (unsigned long *)NULL;
+	return NULL;
     }
     amount = (amount + (sizeof(long) - 1)) & ~(sizeof(long) - 1);
     if (ptr)
-        ptr = (pointer)realloc((char *)ptr, amount);
+        ptr = realloc(ptr, amount);
     else
-	ptr = (pointer)malloc(amount);
+	ptr = malloc(amount);
-    if (ptr)
+
-        return (unsigned long *)ptr;
+    return ptr;
-    if (Must_have_memory)
-	FatalError("Out of memory");
-    return (unsigned long *)NULL;
 }
                     
 /*****************
  * XNFrealloc 
- * "no failure" realloc, alternate interface to Xrealloc w/o Must_have_memory
+ * "no failure" realloc
  *****************/
 
 _X_EXPORT void *
 XNFrealloc(pointer ptr, unsigned long amount)
 {
-    if (( ptr = (pointer)Xrealloc( ptr, amount ) ) == NULL)
+    if ((ptr = Xrealloc(ptr, amount)) == NULL)
     {
 	if ((long)amount > 0)
             FatalError( "Out of memory" );
     }
-    return ((unsigned long *)ptr);
+    return ptr;
 }
 
 /*****************
@@ -1194,7 +1168,7 @@ _X_EXPORT void
 Xfree(pointer ptr)
 {
     if (ptr)
-	free((char *)ptr); 
+	free(ptr); 
 }
 #endif /* !INTERNAL_MALLOC */
 
@@ -1207,7 +1181,7 @@ Xstrdup(const char *s)
     if (s == NULL)
 	return NULL;
 
-    sd = (char *)Xalloc(strlen(s) + 1);
+    sd = Xalloc(strlen(s) + 1);
     if (sd != NULL)
 	strcpy(sd, s);
     return sd;
@@ -1222,7 +1196,7 @@ XNFstrdup(const char *s)
     if (s == NULL)
 	return NULL;
 
-    sd = (char *)XNFalloc(strlen(s) + 1);
+    sd = XNFalloc(strlen(s) + 1);
     strcpy(sd, s);
     return sd;
 }