mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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130 lines
4.7 KiB
C++
130 lines
4.7 KiB
C++
/*
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* Copyright (c) 2018-2020 Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <mesosphere.hpp>
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namespace ams::kern::svc {
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/* ============================= Common ============================= */
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namespace {
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Result SignalEvent(ams::svc::Handle event_handle) {
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/* Get the current handle table. */
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auto &handle_table = GetCurrentProcess().GetHandleTable();
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/* Get the writable event. */
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KScopedAutoObject writable_event = handle_table.GetObject<KWritableEvent>(event_handle);
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R_UNLESS(writable_event.IsNotNull(), svc::ResultInvalidHandle());
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return writable_event->Signal();
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}
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Result ClearEvent(ams::svc::Handle event_handle) {
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/* Get the current handle table. */
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auto &handle_table = GetCurrentProcess().GetHandleTable();
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/* Try to clear the writable event. */
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{
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KScopedAutoObject writable_event = handle_table.GetObject<KWritableEvent>(event_handle);
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if (writable_event.IsNotNull()) {
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return writable_event->Clear();
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}
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}
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/* Try to clear the readable event. */
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{
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KScopedAutoObject readable_event = handle_table.GetObject<KReadableEvent>(event_handle);
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if (readable_event.IsNotNull()) {
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return readable_event->Clear();
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}
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}
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return svc::ResultInvalidHandle();
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}
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Result CreateEvent(ams::svc::Handle *out_write, ams::svc::Handle *out_read) {
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/* Get the current process and handle table. */
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auto &process = GetCurrentProcess();
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auto &handle_table = process.GetHandleTable();
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/* Reserve a new event from the process resource limit. */
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KScopedResourceReservation event_reservation(std::addressof(process), ams::svc::LimitableResource_EventCountMax);
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R_UNLESS(event_reservation.Succeeded(), svc::ResultLimitReached());
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/* Create a new event. */
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KEvent *event = KEvent::Create();
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R_UNLESS(event != nullptr, svc::ResultOutOfResource());
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/* Initialize the event. */
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event->Initialize();
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/* Commit the event reservation. */
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event_reservation.Commit();
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/* Ensure that we clean up the event (and its only references are handle table) on function end. */
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ON_SCOPE_EXIT {
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event->GetWritableEvent().Close();
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event->GetReadableEvent().Close();
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};
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/* Register the event. */
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KEvent::Register(event);
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/* Add the writable event to the handle table. */
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R_TRY(handle_table.Add(out_write, std::addressof(event->GetWritableEvent())));
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/* Ensure that we maintaing a clean handle state on exit. */
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auto handle_guard = SCOPE_GUARD { handle_table.Remove(*out_write); };
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/* Add the readable event to the handle table. */
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R_TRY(handle_table.Add(out_read, std::addressof(event->GetReadableEvent())));
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/* We succeeded! */
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handle_guard.Cancel();
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return ResultSuccess();
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}
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}
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/* ============================= 64 ABI ============================= */
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Result SignalEvent64(ams::svc::Handle event_handle) {
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return SignalEvent(event_handle);
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}
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Result ClearEvent64(ams::svc::Handle event_handle) {
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return ClearEvent(event_handle);
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}
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Result CreateEvent64(ams::svc::Handle *out_write_handle, ams::svc::Handle *out_read_handle) {
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return CreateEvent(out_write_handle, out_read_handle);
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}
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/* ============================= 64From32 ABI ============================= */
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Result SignalEvent64From32(ams::svc::Handle event_handle) {
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return SignalEvent(event_handle);
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}
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Result ClearEvent64From32(ams::svc::Handle event_handle) {
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return ClearEvent(event_handle);
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}
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Result CreateEvent64From32(ams::svc::Handle *out_write_handle, ams::svc::Handle *out_read_handle) {
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return CreateEvent(out_write_handle, out_read_handle);
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}
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}
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