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https://github.com/Atmosphere-NX/Atmosphere.git
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96f95b9f95
* result: try out some experimental shenanigans * result: sketch out some more shenanigans * result: see what it looks like to convert kernel to use result conds instead of guards * make rest of kernel use experimental new macro-ing
106 lines
4.5 KiB
C++
106 lines
4.5 KiB
C++
/*
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* Copyright (c) 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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constexpr bool IsKernelAddress(uintptr_t address) {
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return KernelVirtualAddressSpaceBase <= address && address < KernelVirtualAddressSpaceEnd;
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}
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constexpr bool IsValidSignalType(ams::svc::SignalType type) {
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switch (type) {
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case ams::svc::SignalType_Signal:
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case ams::svc::SignalType_SignalAndIncrementIfEqual:
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case ams::svc::SignalType_SignalAndModifyByWaitingCountIfEqual:
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return true;
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default:
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return false;
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}
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}
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constexpr bool IsValidArbitrationType(ams::svc::ArbitrationType type) {
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switch (type) {
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case ams::svc::ArbitrationType_WaitIfLessThan:
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case ams::svc::ArbitrationType_DecrementAndWaitIfLessThan:
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case ams::svc::ArbitrationType_WaitIfEqual:
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return true;
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default:
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return false;
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}
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}
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Result WaitForAddress(uintptr_t address, ams::svc::ArbitrationType arb_type, int32_t value, int64_t timeout_ns) {
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/* Validate input. */
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R_UNLESS(AMS_LIKELY(!IsKernelAddress(address)), svc::ResultInvalidCurrentMemory());
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R_UNLESS(util::IsAligned(address, sizeof(int32_t)), svc::ResultInvalidAddress());
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R_UNLESS(IsValidArbitrationType(arb_type), svc::ResultInvalidEnumValue());
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/* Convert timeout from nanoseconds to ticks. */
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s64 timeout;
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if (timeout_ns > 0) {
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const ams::svc::Tick offset_tick(TimeSpan::FromNanoSeconds(timeout_ns));
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if (AMS_LIKELY(offset_tick > 0)) {
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timeout = KHardwareTimer::GetTick() + offset_tick + 2;
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if (AMS_UNLIKELY(timeout <= 0)) {
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timeout = std::numeric_limits<s64>::max();
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}
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} else {
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timeout = std::numeric_limits<s64>::max();
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}
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} else {
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timeout = timeout_ns;
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}
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R_RETURN(GetCurrentProcess().WaitAddressArbiter(address, arb_type, value, timeout));
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}
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Result SignalToAddress(uintptr_t address, ams::svc::SignalType signal_type, int32_t value, int32_t count) {
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/* Validate input. */
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R_UNLESS(AMS_LIKELY(!IsKernelAddress(address)), svc::ResultInvalidCurrentMemory());
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R_UNLESS(util::IsAligned(address, sizeof(int32_t)), svc::ResultInvalidAddress());
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R_UNLESS(IsValidSignalType(signal_type), svc::ResultInvalidEnumValue());
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R_RETURN(GetCurrentProcess().SignalAddressArbiter(address, signal_type, value, count));
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}
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}
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/* ============================= 64 ABI ============================= */
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Result WaitForAddress64(ams::svc::Address address, ams::svc::ArbitrationType arb_type, int32_t value, int64_t timeout_ns) {
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R_RETURN(WaitForAddress(address, arb_type, value, timeout_ns));
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}
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Result SignalToAddress64(ams::svc::Address address, ams::svc::SignalType signal_type, int32_t value, int32_t count) {
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R_RETURN(SignalToAddress(address, signal_type, value, count));
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}
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/* ============================= 64From32 ABI ============================= */
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Result WaitForAddress64From32(ams::svc::Address address, ams::svc::ArbitrationType arb_type, int32_t value, int64_t timeout_ns) {
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R_RETURN(WaitForAddress(address, arb_type, value, timeout_ns));
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}
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Result SignalToAddress64From32(ams::svc::Address address, ams::svc::SignalType signal_type, int32_t value, int32_t count) {
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R_RETURN(SignalToAddress(address, signal_type, value, count));
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}
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}
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