[PATCH] dri3: Allow asynchronous implementation for dri3_open

[Kristian Høgsberg]

By passing the client pointer to the dri3_open implementation, we allow
the clients to implement the open callback asynchronously.  If the
client ignore count is positive after returning from dri3_open, we
assume that authentication is in progress and doesn't send the reply.
The code to send the reply is moved into a helper function, which the
implementation can call upon receiving its authenticaion reply.

Signed-off-by: Kristian Høgsberg <krh at bitplanet.net>
---
 dri3/dri3.h         |  6 +++++-
 dri3/dri3_request.c | 38 ++++++++++++++++++++++++--------------
 dri3/dri3_screen.c  |  2 +-
 3 files changed, 30 insertions(+), 16 deletions(-)

diff --git a/dri3/dri3.h b/dri3/dri3.h
index 7c0c330..1c04cbd 100644
--- a/dri3/dri3.h
+++ b/dri3/dri3.h
@@ -32,7 +32,8 @@
 
 #define DRI3_SCREEN_INFO_VERSION        0
 
-typedef int (*dri3_open_proc)(ScreenPtr screen,
+typedef int (*dri3_open_proc)(ClientPtr client,
+                              ScreenPtr screen,
                               RRProviderPtr provider,
                               int *fd);
 
@@ -60,6 +61,9 @@ typedef struct dri3_screen_info {
 extern _X_EXPORT Bool
 dri3_screen_init(ScreenPtr screen, dri3_screen_info_ptr info);
 
+extern _X_EXPORT int
+dri3_send_open_reply(ClientPtr client, int fd);
+
 #endif
 
 #endif /* _DRI3_H_ */
diff --git a/dri3/dri3_request.c b/dri3/dri3_request.c
index 31dce83..fe45620 100644
--- a/dri3/dri3_request.c
+++ b/dri3/dri3_request.c
@@ -55,16 +55,35 @@ proc_dri3_query_version(ClientPtr client)
     return Success;
 }
 
-static int
-proc_dri3_open(ClientPtr client)
+int
+dri3_send_open_reply(ClientPtr client, int fd)
 {
-    REQUEST(xDRI3OpenReq);
     xDRI3OpenReply rep = {
         .type = X_Reply,
         .nfd = 1,
         .sequenceNumber = client->sequence,
         .length = 0,
     };
+
+    if (client->swapped) {
+        swaps(&rep.sequenceNumber);
+        swapl(&rep.length);
+    }
+
+    if (WriteFdToClient(client, fd, TRUE) < 0) {
+        close(fd);
+        return BadAlloc;
+    }
+
+    WriteToClient(client, sizeof (rep), &rep);
+
+    return Success;
+}
+
+static int
+proc_dri3_open(ClientPtr client)
+{
+    REQUEST(xDRI3OpenReq);
     RRProviderPtr provider;
     DrawablePtr drawable;
     ScreenPtr screen;
@@ -92,17 +111,8 @@ proc_dri3_open(ClientPtr client)
     if (status != Success)
         return status;
 
-    if (client->swapped) {
-        swaps(&rep.sequenceNumber);
-        swapl(&rep.length);
-    }
-
-    if (WriteFdToClient(client, fd, TRUE) < 0) {
-        close(fd);
-        return BadAlloc;
-    }
-
-    WriteToClient(client, sizeof (rep), &rep);
+    if (client->ignoreCount == 0)
+        return dri3_send_open_reply(client, fd);
 
     return Success;
 }
diff --git a/dri3/dri3_screen.c b/dri3/dri3_screen.c
index c880296..bbf1d05 100644
--- a/dri3/dri3_screen.c
+++ b/dri3/dri3_screen.c
@@ -40,7 +40,7 @@ dri3_open(ClientPtr client, ScreenPtr screen, RRProviderPtr provider, int *fd)
     if (!info || !info->open)
         return BadMatch;
 
-    rc = (*info->open) (screen, provider, fd);
+    rc = (*info->open) (client, screen, provider, fd);
     if (rc != Success)
         return rc;
 
-- 
1.9.0