commit 43550eee5bfeaf7832487a2285ae86be0f7ce561
author Jeff Brown <jeffbrown@google.com> Thu Mar 17 01:34:19 2011 -0700
committer Alex Ray <aray@google.com> Tue Jul 30 13:56:56 2013 -0700
tree 416b1750a40bced1f92c0d6025b7ca95755eed3e
parent 7c123375ffee76d6e15b611e8146c13bb67a8c9f

Refactor how timeouts are calculated.

Added a timeout mechanism to EventHub and InputReader so that
InputMappers can request timeouts to perform delayed processing of
input when needed.

Change-Id: Iec2045baaf4e67690b15eef3c09a58d5cac76897

libs/utils/Timers.cpp

diff --git a/libs/utils/Timers.cpp b/libs/utils/Timers.cpp
index 784f035..64a29f5 100644
--- a/libs/utils/Timers.cpp
+++ b/libs/utils/Timers.cpp
@@ -26,6 +26,7 @@
 #include <sys/time.h>
 #include <time.h>
 #include <errno.h>
+#include <limits.h>
 
 #ifdef HAVE_WIN32_THREADS
 #include <windows.h>
@@ -53,6 +54,23 @@
 #endif
 }
 
+int toMillisecondTimeoutDelay(nsecs_t referenceTime, nsecs_t timeoutTime)
+{
+    int timeoutDelayMillis;
+    if (timeoutTime > referenceTime) {
+        uint64_t timeoutDelay = uint64_t(timeoutTime - referenceTime);
+        if (timeoutDelay > uint64_t((INT_MAX - 1) * 1000000LL)) {
+            timeoutDelayMillis = -1;
+        } else {
+            timeoutDelayMillis = (timeoutDelay + 999999LL) / 1000000LL;
+        }
+    } else {
+        timeoutDelayMillis = 0;
+    }
+    return timeoutDelayMillis;
+}
+
+
 /*
  * ===========================================================================
  *      DurationTimer