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service: vi: Retrieve vsync event once per display

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The display vsync event can only be retrieved once per display. Returns VI::ResultPermissionDenied if we attempt to retrieve the vsync event for the same display.

Prevents games such as .hack//G.U. Last Recode from consuming all the handles in the handle table by spamming vsync event retrievals and allows it to go in game.
This commit is contained in:
Morph
2022-09-25 21:20:36 -04:00
parent acc887cc34
commit 41e855bd42
5 changed files with 42 additions and 14 deletions
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6
src/core/hle/service/nvflinger/nvflinger.h
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@ -11,6 +11,7 @@
#include <vector>
#include "common/common_types.h"
#include "core/hle/result.h"
#include "core/hle/service/kernel_helpers.h"
namespace Common {
@ -71,8 +72,9 @@ public:
/// Gets the vsync event for the specified display.
///
/// If an invalid display ID is provided, then nullptr is returned.
[[nodiscard]] Kernel::KReadableEvent* FindVsyncEvent(u64 display_id);
/// If an invalid display ID is provided, then VI::ResultNotFound is returned.
/// If the vsync event has already been retrieved, then VI::ResultPermissionDenied is returned.
[[nodiscard]] ResultVal<Kernel::KReadableEvent*> FindVsyncEvent(u64 display_id);
/// Performs a composition request to the emulated nvidia GPU and triggers the vsync events when
/// finished.