[PATCH xserver 1/4] xfree86: Add VT client tracking

[Adam Jackson]

A VT client is one that needs to be put to sleep when we don't own the
VT, and woken up when we regain it.

Signed-off-by: Adam Jackson <ajax at redhat.com>
---
 hw/xfree86/common/xf86.h       |  3 +++
 hw/xfree86/common/xf86Events.c | 55 ++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 58 insertions(+)

diff --git a/hw/xfree86/common/xf86.h b/hw/xfree86/common/xf86.h
index 674e83cb1..3b66d20ff 100644
--- a/hw/xfree86/common/xf86.h
+++ b/hw/xfree86/common/xf86.h
@@ -222,6 +222,9 @@ extern _X_EXPORT void xf86PrintBacktrace(void);
 extern _X_EXPORT Bool xf86VTOwner(void);
 extern _X_EXPORT void xf86VTLeave(void);
 extern _X_EXPORT void xf86VTEnter(void);
+extern _X_EXPORT Bool xf86SetupVTClients(void);
+extern _X_EXPORT void xf86SetVTClient(ClientPtr client);
+extern _X_EXPORT int xf86SetAndSleepVTClient(ClientPtr client);
 extern _X_EXPORT void xf86EnableInputDeviceForVTSwitch(InputInfoPtr pInfo);
 extern _X_EXPORT void xf86DisableInputDeviceForVTSwitch(InputInfoPtr pInfo);
 
diff --git a/hw/xfree86/common/xf86Events.c b/hw/xfree86/common/xf86Events.c
index 53ec74f26..76fb6192c 100644
--- a/hw/xfree86/common/xf86Events.c
+++ b/hw/xfree86/common/xf86Events.c
@@ -393,6 +393,59 @@ xf86UpdateHasVTProperty(Bool hasVT)
     }
 }
 
+static DevPrivateKeyRec VTClientPrivateKey;
+
+static int *
+clientVTSleep(ClientPtr client)
+{
+    return dixGetPrivateAddr(&client->devPrivates, &VTClientPrivateKey);
+}
+
+Bool
+xf86SetupVTClients(void)
+{
+    return dixRegisterPrivateKey(&VTClientPrivateKey, PRIVATE_CLIENT,
+                                 sizeof(int));
+}
+
+static void
+xf86SleepVTClients(void)
+{
+    for (int i = 1; i < currentMaxClients; i++) {
+        ClientPtr client = clients[i];
+
+        if (*clientVTSleep(client))
+            IgnoreClient(client);
+    }
+}
+
+static void
+xf86WakeVTClients(void)
+{
+    for (int i = 1; i < currentMaxClients; i++) {
+        ClientPtr client = clients[i];
+
+        if (*clientVTSleep(client))
+            AttendClient(client);
+    }
+}
+
+void
+xf86SetVTClient(ClientPtr client)
+{
+    *clientVTSleep(client) = TRUE;
+}
+
+int
+xf86SetAndSleepVTClient(ClientPtr client)
+{
+    xf86SetVTClient(client);
+    ResetCurrentRequest(client);
+    client->sequence--;
+    IgnoreClient(client);
+    return Success;
+}
+
 void
 xf86VTLeave(void)
 {
@@ -451,6 +504,7 @@ xf86VTLeave(void)
         xf86DisableIO();
 
     xf86UpdateHasVTProperty(FALSE);
+    xf86SleepVTClients();
 
     return;
 
@@ -535,6 +589,7 @@ xf86VTEnter(void)
     xf86platformVTProbe();
 #endif
 
+    xf86WakeVTClients();
     xf86UpdateHasVTProperty(TRUE);
 
     input_unlock();
-- 
2.13.0