From dd007e3fe7a9e003b3895881be565c7b1ee706c0 Mon Sep 17 00:00:00 2001
From: Sam Lantinga <slouken@libsdl.org>
Date: Wed, 18 Jan 2017 11:58:16 -0800
Subject: [PATCH] Fixed bug 3561 - Re-acquire device before playing effects if
 needed.

Mathieu Laurendeau

Check the result of IDirectInputEffect_SetParameters and re-acquire the device to solve concurrency issues.
---
 src/haptic/windows/SDL_dinputhaptic.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/src/haptic/windows/SDL_dinputhaptic.c b/src/haptic/windows/SDL_dinputhaptic.c
index fb73557e44da6..59ef956582b4d 100644
--- a/src/haptic/windows/SDL_dinputhaptic.c
+++ b/src/haptic/windows/SDL_dinputhaptic.c
@@ -1016,6 +1016,19 @@ SDL_DINPUT_HapticUpdateEffect(SDL_Haptic * haptic, struct haptic_effect *effect,
     /* Create the actual effect. */
     ret =
         IDirectInputEffect_SetParameters(effect->hweffect->ref, &temp, flags);
+    if (ret == DIERR_NOTEXCLUSIVEACQUIRED) {
+        IDirectInputDevice8_Unacquire(haptic->hwdata->device);
+        ret = IDirectInputDevice8_SetCooperativeLevel(haptic->hwdata->device, SDL_HelperWindow, DISCL_EXCLUSIVE | DISCL_BACKGROUND);
+        if (SUCCEEDED(ret)) {
+            ret = DIERR_NOTACQUIRED;
+        }
+    }
+    if (ret == DIERR_INPUTLOST || ret == DIERR_NOTACQUIRED) {
+        ret = IDirectInputDevice8_Acquire(haptic->hwdata->device);
+        if (SUCCEEDED(ret)) {
+            ret = IDirectInputEffect_SetParameters(effect->hweffect->ref, &temp, flags);
+        }
+    }
     if (FAILED(ret)) {
         DI_SetError("Unable to update effect", ret);
         goto err_update;