[PATCH xserver 16/20] hw/xfree86: Use NotifyFd for device and other input fd wakeups

[Keith Packard]

Remove code in xf86Wakeup for dealing with device and other input and
switch to using the new NotifyFd interface.

Signed-off-by: Keith Packard <keithp at keithp.com>
---
 hw/xfree86/common/xf86Events.c | 67 ++++++++++++++++--------------------------
 1 file changed, 26 insertions(+), 41 deletions(-)

diff --git a/hw/xfree86/common/xf86Events.c b/hw/xfree86/common/xf86Events.c
index 6570f0b..b27d545 100644
--- a/hw/xfree86/common/xf86Events.c
+++ b/hw/xfree86/common/xf86Events.c
@@ -101,8 +101,6 @@ Bool VTSwitchEnabled = TRUE;    /* Allows run-time disabling for
                                  switches when using the DRI
                                  automatic full screen mode.*/
 
-extern fd_set EnabledDevices;
-
 #ifdef XF86PM
 extern void (*xf86OSPMClose) (void);
 #endif
@@ -247,45 +245,6 @@ xf86ProcessActionEvent(ActionEvent action, void *arg)
 void
 xf86Wakeup(void *blockData, int err, void *pReadmask)
 {
-    fd_set *LastSelectMask = (fd_set *) pReadmask;
-    fd_set devicesWithInput;
-    InputInfoPtr pInfo;
-
-    if (err >= 0) {
-
-        XFD_ANDSET(&devicesWithInput, LastSelectMask, &EnabledDevices);
-        if (XFD_ANYSET(&devicesWithInput)) {
-            pInfo = xf86InputDevs;
-            while (pInfo) {
-                if (pInfo->read_input && pInfo->fd >= 0 &&
-                    (FD_ISSET(pInfo->fd, &devicesWithInput) != 0)) {
-                    OsBlockSIGIO();
-
-                    /*
-                     * Remove the descriptior from the set because more than one
-                     * device may share the same file descriptor.
-                     */
-                    FD_CLR(pInfo->fd, &devicesWithInput);
-
-                    pInfo->read_input(pInfo);
-                    OsReleaseSIGIO();
-                }
-                pInfo = pInfo->next;
-            }
-        }
-    }
-
-    if (err >= 0) {             /* we don't want the handlers called if select() */
-        IHPtr ih, ih_tmp;       /* returned with an error condition, do we?      */
-
-        nt_list_for_each_entry_safe(ih, ih_tmp, InputHandlers, next) {
-            if (ih->enabled && ih->fd >= 0 && ih->ihproc &&
-                (FD_ISSET(ih->fd, ((fd_set *) pReadmask)) != 0)) {
-                ih->ihproc(ih->fd, ih->data);
-            }
-        }
-    }
-
     if (xf86VTSwitchPending())
         xf86VTSwitch();
 }
@@ -305,6 +264,15 @@ xf86SigioReadInput(int fd, void *closure)
     errno = errno_save;
 }
 
+static void
+xf86NotifyReadInput(int fd, int ready, void *closure)
+{
+    InputInfoPtr pInfo = closure;
+    OsBlockSIGIO();
+    pInfo->read_input(pInfo);
+    OsReleaseSIGIO();
+}
+
 /*
  * xf86AddEnabledDevice --
  *
@@ -314,6 +282,7 @@ xf86AddEnabledDevice(InputInfoPtr pInfo)
 {
     if (!xf86InstallSIGIOHandler(pInfo->fd, xf86SigioReadInput, pInfo)) {
         AddEnabledDevice(pInfo->fd);
+        SetNotifyFd(pInfo->fd, xf86NotifyReadInput, X_NOTIFY_READ, pInfo);
     }
 }
 
@@ -326,6 +295,7 @@ xf86RemoveEnabledDevice(InputInfoPtr pInfo)
 {
     if (!xf86RemoveSIGIOHandler(pInfo->fd)) {
         RemoveEnabledDevice(pInfo->fd);
+        RemoveNotifyFd(pInfo->fd);
     }
 }
 
@@ -635,6 +605,16 @@ xf86VTSwitch(void)
 
 /* Input handler registration */
 
+static void
+xf86InputHandlerNotify(int fd, int ready, void *data)
+{
+    IHPtr       ih = data;
+
+    if (ih->enabled && ih->fd >= 0 && ih->ihproc) {
+        ih->ihproc(ih->fd, ih->data);
+    }
+}
+
 static void *
 addInputHandler(int fd, InputHandlerProc proc, void *data)
 {
@@ -652,6 +632,11 @@ addInputHandler(int fd, InputHandlerProc proc, void *data)
     ih->data = data;
     ih->enabled = TRUE;
 
+    if (!SetNotifyFd(fd, xf86InputHandlerNotify, X_NOTIFY_READ, ih)) {
+        free(ih);
+        return NULL;
+    }
+
     ih->next = InputHandlers;
     InputHandlers = ih;
 
-- 
2.6.1