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Prevent a race between surface destruction and focus

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The Wayland protocol is asynchronous, by the time we destroy a surface,
the compositor may have sent a wl_keyboard::enter or wl_pointer::enter
events which now point to no surface, yet we receive it after.

To prevent this race, we can just ignore any enter event targetting a
NULL surface.

Fixes #1150.
This commit is contained in:
Emmanuel Gil Peyrot 2018-01-24 13:36:01 +01:00 committed by linkmauve
parent 973bf29622
commit eb732457ea
1 changed files with 8 additions and 0 deletions
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8
src/wl_init.c
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@ -49,6 +49,10 @@ static void pointerHandleEnter(void* data,
wl_fixed_t sx,
wl_fixed_t sy)
{
// Happens in the case we just destroyed the surface.
if (!surface)
return;
_GLFWwindow* window = wl_surface_get_user_data(surface);
_glfw.wl.pointerSerial = serial;
@ -280,6 +284,10 @@ static void keyboardHandleEnter(void* data,
struct wl_surface* surface,
struct wl_array* keys)
{
// Happens in the case we just destroyed the surface.
if (!surface)
return;
_GLFWwindow* window = wl_surface_get_user_data(surface);
_glfw.wl.keyboardFocus = window;