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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
66 lines
2.4 KiB
C++
66 lines
2.4 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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Result ArbitrateLock(ams::svc::Handle thread_handle, uintptr_t address, uint32_t tag) {
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/* Validate the input address. */
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R_UNLESS(!IsKernelAddress(address), svc::ResultInvalidCurrentMemory());
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R_UNLESS(util::IsAligned(address, sizeof(u32)), svc::ResultInvalidAddress());
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R_RETURN(KConditionVariable::WaitForAddress(thread_handle, address, tag));
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}
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Result ArbitrateUnlock(uintptr_t address) {
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/* Validate the input address. */
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R_UNLESS(!IsKernelAddress(address), svc::ResultInvalidCurrentMemory());
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R_UNLESS(util::IsAligned(address, sizeof(u32)), svc::ResultInvalidAddress());
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R_RETURN(KConditionVariable::SignalToAddress(address));
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}
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}
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/* ============================= 64 ABI ============================= */
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Result ArbitrateLock64(ams::svc::Handle thread_handle, ams::svc::Address address, uint32_t tag) {
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R_RETURN(ArbitrateLock(thread_handle, address, tag));
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}
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Result ArbitrateUnlock64(ams::svc::Address address) {
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R_RETURN(ArbitrateUnlock(address));
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}
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/* ============================= 64From32 ABI ============================= */
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Result ArbitrateLock64From32(ams::svc::Handle thread_handle, ams::svc::Address address, uint32_t tag) {
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R_RETURN(ArbitrateLock(thread_handle, address, tag));
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}
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Result ArbitrateUnlock64From32(ams::svc::Address address) {
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R_RETURN(ArbitrateUnlock(address));
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}
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}
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