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Diffstat (limited to '')
-rw-r--r-- | src/core/hle/kernel/svc/svc_event.cpp | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/src/core/hle/kernel/svc/svc_event.cpp b/src/core/hle/kernel/svc/svc_event.cpp new file mode 100644 index 000000000..e8fb9efbc --- /dev/null +++ b/src/core/hle/kernel/svc/svc_event.cpp @@ -0,0 +1,124 @@ +// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project +// SPDX-License-Identifier: GPL-2.0-or-later + +#include "common/scope_exit.h" +#include "core/core.h" +#include "core/hle/kernel/k_event.h" +#include "core/hle/kernel/k_process.h" +#include "core/hle/kernel/k_scoped_resource_reservation.h" +#include "core/hle/kernel/kernel.h" +#include "core/hle/kernel/svc.h" + +namespace Kernel::Svc { + +Result SignalEvent(Core::System& system, Handle event_handle) { + LOG_DEBUG(Kernel_SVC, "called, event_handle=0x{:08X}", event_handle); + + // Get the current handle table. + const KHandleTable& handle_table = system.Kernel().CurrentProcess()->GetHandleTable(); + + // Get the event. + KScopedAutoObject event = handle_table.GetObject<KEvent>(event_handle); + R_UNLESS(event.IsNotNull(), ResultInvalidHandle); + + return event->Signal(); +} + +Result ClearEvent(Core::System& system, Handle event_handle) { + LOG_TRACE(Kernel_SVC, "called, event_handle=0x{:08X}", event_handle); + + // Get the current handle table. + const auto& handle_table = system.Kernel().CurrentProcess()->GetHandleTable(); + + // Try to clear the writable event. + { + KScopedAutoObject event = handle_table.GetObject<KEvent>(event_handle); + if (event.IsNotNull()) { + return event->Clear(); + } + } + + // Try to clear the readable event. + { + KScopedAutoObject readable_event = handle_table.GetObject<KReadableEvent>(event_handle); + if (readable_event.IsNotNull()) { + return readable_event->Clear(); + } + } + + LOG_ERROR(Kernel_SVC, "Event handle does not exist, event_handle=0x{:08X}", event_handle); + + return ResultInvalidHandle; +} + +Result CreateEvent(Core::System& system, Handle* out_write, Handle* out_read) { + LOG_DEBUG(Kernel_SVC, "called"); + + // Get the kernel reference and handle table. + auto& kernel = system.Kernel(); + auto& handle_table = kernel.CurrentProcess()->GetHandleTable(); + + // Reserve a new event from the process resource limit + KScopedResourceReservation event_reservation(kernel.CurrentProcess(), + LimitableResource::EventCountMax); + R_UNLESS(event_reservation.Succeeded(), ResultLimitReached); + + // Create a new event. + KEvent* event = KEvent::Create(kernel); + R_UNLESS(event != nullptr, ResultOutOfResource); + + // Initialize the event. + event->Initialize(kernel.CurrentProcess()); + + // Commit the thread reservation. + event_reservation.Commit(); + + // Ensure that we clean up the event (and its only references are handle table) on function end. + SCOPE_EXIT({ + event->GetReadableEvent().Close(); + event->Close(); + }); + + // Register the event. + KEvent::Register(kernel, event); + + // Add the event to the handle table. + R_TRY(handle_table.Add(out_write, event)); + + // Ensure that we maintaing a clean handle state on exit. + auto handle_guard = SCOPE_GUARD({ handle_table.Remove(*out_write); }); + + // Add the readable event to the handle table. + R_TRY(handle_table.Add(out_read, std::addressof(event->GetReadableEvent()))); + + // We succeeded. + handle_guard.Cancel(); + return ResultSuccess; +} + +Result SignalEvent64(Core::System& system, Handle event_handle) { + R_RETURN(SignalEvent(system, event_handle)); +} + +Result ClearEvent64(Core::System& system, Handle event_handle) { + R_RETURN(ClearEvent(system, event_handle)); +} + +Result CreateEvent64(Core::System& system, Handle* out_write_handle, Handle* out_read_handle) { + R_RETURN(CreateEvent(system, out_write_handle, out_read_handle)); +} + +Result SignalEvent64From32(Core::System& system, Handle event_handle) { + R_RETURN(SignalEvent(system, event_handle)); +} + +Result ClearEvent64From32(Core::System& system, Handle event_handle) { + R_RETURN(ClearEvent(system, event_handle)); +} + +Result CreateEvent64From32(Core::System& system, Handle* out_write_handle, + Handle* out_read_handle) { + R_RETURN(CreateEvent(system, out_write_handle, out_read_handle)); +} + +} // namespace Kernel::Svc |