From fb170498abc746a850864b59db2ddcba7ee29215 Mon Sep 17 00:00:00 2001
From: Jon TURNEY <jon.turney@dronecode.org.uk>
Date: Tue, 13 Nov 2012 13:22:44 +0000
Subject: [PATCH] dix/dispatch.c, os/utils.c: Disable smart scheduler on WIN32

setitimer() and SIGALRM aren't available on WIN32, so smart scheduler
code cannot be built.  Provide only stubs for smart scheduler timer
code, and disable smart scheduler by default.

Signed-off-by: Ryan Pavlik <rpavlik@iastate.edu>
Reviewed-by: Jon TURNEY <jon.turney@dronecode.org.uk>
Tested-by: Yaakov Selkowitz <yselkowitz@users.sourceforge.net>
Reviewed-by: Keith Packard <keithp@keithp.com>
---
 dix/dispatch.c | 4 ++++
 os/utils.c     | 9 +++++++++
 2 files changed, 13 insertions(+)

diff --git a/dix/dispatch.c b/dix/dispatch.c
index 2df1a6ea5..99ba277fb 100644
--- a/dix/dispatch.c
+++ b/dix/dispatch.c
@@ -223,7 +223,11 @@ UpdateCurrentTimeIf(void)
 #define SMART_SCHEDULE_DEFAULT_INTERVAL	20      /* ms */
 #define SMART_SCHEDULE_MAX_SLICE	200     /* ms */
 
+#if defined(WIN32) && !defined(__CYGWIN__)
+Bool SmartScheduleDisable = TRUE;
+#else
 Bool SmartScheduleDisable = FALSE;
+#endif
 long SmartScheduleSlice = SMART_SCHEDULE_DEFAULT_INTERVAL;
 long SmartScheduleInterval = SMART_SCHEDULE_DEFAULT_INTERVAL;
 long SmartScheduleMaxSlice = SMART_SCHEDULE_MAX_SLICE;
diff --git a/os/utils.c b/os/utils.c
index 411daa047..6f75c1704 100644
--- a/os/utils.c
+++ b/os/utils.c
@@ -71,6 +71,7 @@ __stdcall unsigned long GetTickCount(void);
 #if !defined(WIN32) || !defined(__MINGW32__)
 #include <sys/time.h>
 #include <sys/resource.h>
+# define SMART_SCHEDULE_POSSIBLE
 #endif
 #include "misc.h"
 #include <X11/X.h>
@@ -898,6 +899,7 @@ ProcessCommandLine(int argc, char *argv[])
             i = skip - 1;
         }
 #endif
+#ifdef SMART_SCHEDULE_POSSIBLE
         else if (strcmp(argv[i], "-dumbSched") == 0) {
             SmartScheduleDisable = TRUE;
         }
@@ -916,6 +918,7 @@ ProcessCommandLine(int argc, char *argv[])
             else
                 UseMsg();
         }
+#endif
         else if (strcmp(argv[i], "-render") == 0) {
             if (++i < argc) {
                 int policy = PictureParseCmapPolicy(argv[i]);
@@ -1127,6 +1130,7 @@ XNFstrdup(const char *s)
 void
 SmartScheduleStopTimer(void)
 {
+#ifdef SMART_SCHEDULE_POSSIBLE
     struct itimerval timer;
 
     if (SmartScheduleDisable)
@@ -1136,11 +1140,13 @@ SmartScheduleStopTimer(void)
     timer.it_value.tv_sec = 0;
     timer.it_value.tv_usec = 0;
     (void) setitimer(ITIMER_REAL, &timer, 0);
+#endif
 }
 
 void
 SmartScheduleStartTimer(void)
 {
+#ifdef SMART_SCHEDULE_POSSIBLE
     struct itimerval timer;
 
     if (SmartScheduleDisable)
@@ -1150,6 +1156,7 @@ SmartScheduleStartTimer(void)
     timer.it_value.tv_sec = 0;
     timer.it_value.tv_usec = SmartScheduleInterval * 1000;
     setitimer(ITIMER_REAL, &timer, 0);
+#endif
 }
 
 static void
@@ -1161,6 +1168,7 @@ SmartScheduleTimer(int sig)
 void
 SmartScheduleInit(void)
 {
+#ifdef SMART_SCHEDULE_POSSIBLE
     struct sigaction act;
 
     if (SmartScheduleDisable)
@@ -1176,6 +1184,7 @@ SmartScheduleInit(void)
         perror("sigaction for smart scheduler");
         SmartScheduleDisable = TRUE;
     }
+#endif
 }
 
 #ifdef SIG_BLOCK