From e3cd78b53b9a39913d847c4ef1779f14a391177f Mon Sep 17 00:00:00 2001
From: =?utf8?q?Jos=C3=A9=20Fonseca?= <jose.r.fonseca@gmail.com>
Date: Sat, 13 Oct 2012 09:27:07 +0100
Subject: [PATCH] retrace: Sleep when polling for input.

As Carl Worth identified, if the user passed the "-w" option to beable
to see the last frame of the retrace, the glretrace would enter a
busy-waiting loop, consuming as much CPU as possible.
---
 common/os_time.hpp          | 24 ++++++++++++++++++------
 retrace/d3dretrace_main.cpp |  1 +
 retrace/glretrace_main.cpp  |  1 +
 3 files changed, 20 insertions(+), 6 deletions(-)

diff --git a/common/os_time.hpp b/common/os_time.hpp
index 75175d8..13cc733 100644
--- a/common/os_time.hpp
+++ b/common/os_time.hpp
@@ -32,13 +32,16 @@
 
 
 #if defined(_WIN32)
-#include <windows.h>
-#elif defined(__linux__)
-#include <time.h>
-#elif defined(__APPLE__)
-#include <mach/mach_time.h>
+#  include <windows.h>
 #else
-#include <sys/time.h>
+#  if defined(__linux__)
+#    include <time.h>
+#  elif defined(__APPLE__)
+#    include <mach/mach_time.h>
+#  else
+#    include <sys/time.h>
+#  endif
+#  include <unistd.h>
 #endif
 
 
@@ -88,6 +91,15 @@ namespace os {
 #endif
     }
 
+    // Suspend execution
+    inline void
+    sleep(unsigned long usecs) {
+#if defined(_WIN32)
+        Sleep((usecs + 999) / 1000);
+#else
+        usleep(usecs);
+#endif
+    }
 
 } /* namespace os */
 
diff --git a/retrace/d3dretrace_main.cpp b/retrace/d3dretrace_main.cpp
index 40d53ea..9878fe3 100644
--- a/retrace/d3dretrace_main.cpp
+++ b/retrace/d3dretrace_main.cpp
@@ -87,6 +87,7 @@ retrace::flushRendering(void) {
 
 void
 retrace::waitForInput(void) {
+    /* TODO */
 }
 
 void
diff --git a/retrace/glretrace_main.cpp b/retrace/glretrace_main.cpp
index d857d03..1086be9 100755
--- a/retrace/glretrace_main.cpp
+++ b/retrace/glretrace_main.cpp
@@ -435,6 +435,7 @@ retrace::flushRendering(void) {
 void
 retrace::waitForInput(void) {
     while (glws::processEvents()) {
+        os::sleep(100*1000);
     }
 }
 
-- 
2.43.0