Atmosphere/libraries/libmesosphere/source/svc/kern_svc_lock.cpp
SciresM 96f95b9f95
Integrate new result macros. (#1780)
* 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
2022-02-14 14:45:32 -08:00

67 lines
2.4 KiB
C++

/*
* Copyright (c) Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <mesosphere.hpp>
namespace ams::kern::svc {
/* ============================= Common ============================= */
namespace {
constexpr bool IsKernelAddress(uintptr_t address) {
return KernelVirtualAddressSpaceBase <= address && address < KernelVirtualAddressSpaceEnd;
}
Result ArbitrateLock(ams::svc::Handle thread_handle, uintptr_t address, uint32_t tag) {
/* Validate the input address. */
R_UNLESS(!IsKernelAddress(address), svc::ResultInvalidCurrentMemory());
R_UNLESS(util::IsAligned(address, sizeof(u32)), svc::ResultInvalidAddress());
R_RETURN(KConditionVariable::WaitForAddress(thread_handle, address, tag));
}
Result ArbitrateUnlock(uintptr_t address) {
/* Validate the input address. */
R_UNLESS(!IsKernelAddress(address), svc::ResultInvalidCurrentMemory());
R_UNLESS(util::IsAligned(address, sizeof(u32)), svc::ResultInvalidAddress());
R_RETURN(KConditionVariable::SignalToAddress(address));
}
}
/* ============================= 64 ABI ============================= */
Result ArbitrateLock64(ams::svc::Handle thread_handle, ams::svc::Address address, uint32_t tag) {
R_RETURN(ArbitrateLock(thread_handle, address, tag));
}
Result ArbitrateUnlock64(ams::svc::Address address) {
R_RETURN(ArbitrateUnlock(address));
}
/* ============================= 64From32 ABI ============================= */
Result ArbitrateLock64From32(ams::svc::Handle thread_handle, ams::svc::Address address, uint32_t tag) {
R_RETURN(ArbitrateLock(thread_handle, address, tag));
}
Result ArbitrateUnlock64From32(ams::svc::Address address) {
R_RETURN(ArbitrateUnlock(address));
}
}