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Let userland retain the window backing store while drawing into it.

Browse source 
To start painting, call:
gui$get_window_backing_store()

Then finish up with:
gui$release_window_backing_store()

Process will retain the underlying GraphicsBitmap behind the scenes.
This fixes racing between the WindowServer and GUI clients.

This patch also adds a WSWindowLocker that is exactly what it sounds like.
This commit is contained in:
Andreas Kling 2019-01-24 23:40:12 +01:00
parent ccf3fc4618
commit 86eae0f8df
22 changed files with 244 additions and 102 deletions
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13
Kernel/Syscall.h
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@ -67,15 +67,18 @@
__ENUMERATE_SYSCALL(utime) \
__ENUMERATE_SYSCALL(sync) \
__ENUMERATE_SYSCALL(ptsname_r) \
__ENUMERATE_SYSCALL(select) \
__ENUMERATE_SYSCALL(unlink) \
__ENUMERATE_SYSCALL(poll) \
__ENUMERATE_SYSCALL(gui_create_window) \
__ENUMERATE_SYSCALL(gui_destroy_window) \
__ENUMERATE_SYSCALL(gui_get_window_backing_store) \
__ENUMERATE_SYSCALL(gui_release_window_backing_store) \
__ENUMERATE_SYSCALL(gui_invalidate_window) \
__ENUMERATE_SYSCALL(select) \
__ENUMERATE_SYSCALL(gui_get_window_parameters) \
__ENUMERATE_SYSCALL(gui_set_window_parameters) \
__ENUMERATE_SYSCALL(unlink) \
__ENUMERATE_SYSCALL(poll) \
__ENUMERATE_SYSCALL(gui_get_window_title) \
__ENUMERATE_SYSCALL(gui_set_window_title) \
__ENUMERATE_SYSCALL(gui_get_window_rect) \
__ENUMERATE_SYSCALL(gui_set_window_rect) \
struct fd_set;