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-rw-r--r--nx-X11/lib/X11/XlibInt.c30
-rw-r--r--nx-X11/lib/X11/Xlibint.h46
2 files changed, 47 insertions, 29 deletions
diff --git a/nx-X11/lib/X11/XlibInt.c b/nx-X11/lib/X11/XlibInt.c
index 49535fe18..64028d723 100644
--- a/nx-X11/lib/X11/XlibInt.c
+++ b/nx-X11/lib/X11/XlibInt.c
@@ -3732,6 +3732,36 @@ Screen *_XScreenOfWindow (dpy, w)
return NULL;
}
+/*
+ * WARNING: This implementation's pre-conditions and post-conditions
+ * must remain compatible with the old macro-based implementations of
+ * GetReq, GetReqExtra, GetResReq, and GetEmptyReq. The portions of the
+ * Display structure affected by those macros are part of libX11's
+ * ABI.
+ */
+void *_XGetRequest(Display *dpy, CARD8 type, size_t len)
+{
+ xReq *req;
+
+ WORD64ALIGN
+
+ if (dpy->bufptr + len > dpy->bufmax)
+ _XFlush(dpy);
+
+ if (len % 4)
+ fprintf(stderr,
+ "Xlib: request %d length %zd not a multiple of 4.\n",
+ type, len);
+
+ dpy->last_req = dpy->bufptr;
+
+ req = (xReq*)dpy->bufptr;
+ req->reqType = type;
+ req->length = len / 4;
+ dpy->bufptr += len;
+ dpy->request++;
+ return req;
+}
#if defined(WIN32)
diff --git a/nx-X11/lib/X11/Xlibint.h b/nx-X11/lib/X11/Xlibint.h
index 474b77349..a359efca1 100644
--- a/nx-X11/lib/X11/Xlibint.h
+++ b/nx-X11/lib/X11/Xlibint.h
@@ -422,6 +422,19 @@ extern LockInfoPtr _Xglobal_lock;
/* Leftover from CRAY support - was defined empty on all non-Cray systems */
#define WORD64ALIGN
+/**
+ * Return a len-sized request buffer for the request type. This function may
+ * flush the output queue.
+ *
+ * @param dpy The display connection
+ * @param type The request type
+ * @param len Length of the request in bytes
+ *
+ * @returns A pointer to the request buffer with a few default values
+ * initialized.
+ */
+extern void *_XGetRequest(Display *dpy, CARD8 type, size_t len);
+
/*
* GetReq - Get the next available X request packet in the buffer and
* return it.
@@ -433,23 +446,10 @@ extern LockInfoPtr _Xglobal_lock;
#if !defined(UNIXCPP) || defined(ANSICPP)
#define GetReq(name, req) \
- if ((dpy->bufptr + SIZEOF(x##name##Req)) > dpy->bufmax)\
- _XFlush(dpy);\
- req = (x##name##Req *)(dpy->last_req = dpy->bufptr);\
- req->reqType = X_##name;\
- req->length = (SIZEOF(x##name##Req))>>2;\
- dpy->bufptr += SIZEOF(x##name##Req);\
- dpy->request++
-
+ req = (x##name##Req *) _XGetRequest(dpy, X_##name, SIZEOF(x##name##Req))
#else /* non-ANSI C uses empty comment instead of "##" for token concatenation */
#define GetReq(name, req) \
- if ((dpy->bufptr + SIZEOF(x/**/name/**/Req)) > dpy->bufmax)\
- _XFlush(dpy);\
- req = (x/**/name/**/Req *)(dpy->last_req = dpy->bufptr);\
- req->reqType = X_/**/name;\
- req->length = (SIZEOF(x/**/name/**/Req))>>2;\
- dpy->bufptr += SIZEOF(x/**/name/**/Req);\
- dpy->request++
+ req = (x/**/name/**/Req *) _XGetRequest(dpy, X_/**/name, SIZEOF(x/**/name/**/Req))
#endif
/* GetReqExtra is the same as GetReq, but allocates "n" additional
@@ -457,22 +457,10 @@ extern LockInfoPtr _Xglobal_lock;
#if !defined(UNIXCPP) || defined(ANSICPP)
#define GetReqExtra(name, n, req) \
- if ((dpy->bufptr + SIZEOF(x##name##Req) + n) > dpy->bufmax)\
- _XFlush(dpy);\
- req = (x##name##Req *)(dpy->last_req = dpy->bufptr);\
- req->reqType = X_##name;\
- req->length = (SIZEOF(x##name##Req) + n)>>2;\
- dpy->bufptr += SIZEOF(x##name##Req) + n;\
- dpy->request++
+ req = (x##name##Req *) _XGetRequest(dpy, X_##name, SIZEOF(x##name##Req) + n)
#else
#define GetReqExtra(name, n, req) \
- if ((dpy->bufptr + SIZEOF(x/**/name/**/Req) + n) > dpy->bufmax)\
- _XFlush(dpy);\
- req = (x/**/name/**/Req *)(dpy->last_req = dpy->bufptr);\
- req->reqType = X_/**/name;\
- req->length = (SIZEOF(x/**/name/**/Req) + n)>>2;\
- dpy->bufptr += SIZEOF(x/**/name/**/Req) + n;\
- dpy->request++
+ req = (x/**/name/**/Req *) _XGetRequest(dpy, X_/**/name, SIZEOF(x/**/name/**/Req) + n)
#endif