From 9da1afa34ac189c7cc50aedd4df688bd0c9b66d7 Mon Sep 17 00:00:00 2001
From: Andrew Hannam <andrewh@inmarket.com.au>
Date: Thu, 20 Dec 2012 18:32:33 +1000
Subject: [PATCH] Using ginput with polling allow thread preemption

GINPUT when being exclusively polled by the application, did not allow
pre-emption of the main thread and therefore some platforms (Win32) the
mouse/toggle stopped working.
---
 src/ginput/mouse.c  | 4 ++++
 src/ginput/toggle.c | 4 ++++
 2 files changed, 8 insertions(+)

diff --git a/src/ginput/mouse.c b/src/ginput/mouse.c
index 35a55bc5..94734888 100644
--- a/src/ginput/mouse.c
+++ b/src/ginput/mouse.c
@@ -378,6 +378,10 @@ GSourceHandle ginputGetMouse(uint16_t instance) {
 }
 
 bool_t ginputGetMouseStatus(uint16_t instance, GEventMouse *pe) {
+	// Win32 threads don't seem to recognise priority and/or pre-emption
+	// so we add a sleep here to prevent 100% polled applications from locking up.
+	chThdSleepMilliseconds(1);
+
 	if (instance || (MouseConfig.flags & (FLG_INIT_DONE|FLG_IN_CAL)) != FLG_INIT_DONE)
 		return FALSE;
 
diff --git a/src/ginput/toggle.c b/src/ginput/toggle.c
index 66021cd0..4401e295 100644
--- a/src/ginput/toggle.c
+++ b/src/ginput/toggle.c
@@ -145,6 +145,10 @@ void ginputInvertToggle(uint16_t instance, bool_t invert) {
  *	Returns FALSE on error (eg invalid instance)
  */
 bool_t ginputGetToggleStatus(uint16_t instance, GEventToggle *ptoggle) {
+	// Win32 threads don't seem to recognise priority and/or pre-emption
+	// so we add a sleep here to prevent 100% polled applications from locking up.
+	chThdSleepMilliseconds(1);
+
 	if (instance >= GINPUT_TOGGLE_NUM_PORTS)
 		return FALSE;
 	ptoggle->type = GEVENT_TOGGLE;