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112 lines
3.7 KiB
C++
112 lines
3.7 KiB
C++
// Copyright 2014 Citra Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include "common/common_types.h"
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#include "core/mem_map.h"
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#include "core/hle/hle.h"
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#include "core/hle/kernel/address_arbiter.h"
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#include "core/hle/kernel/thread.h"
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////////////////////////////////////////////////////////////////////////////////////////////////////
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// Kernel namespace
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namespace Kernel {
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class AddressArbiter : public WaitObject {
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public:
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std::string GetTypeName() const override { return "Arbiter"; }
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std::string GetName() const override { return name; }
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static const HandleType HANDLE_TYPE = HandleType::AddressArbiter;
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HandleType GetHandleType() const override { return HANDLE_TYPE; }
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std::string name; ///< Name of address arbiter object (optional)
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};
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////////////////////////////////////////////////////////////////////////////////////////////////////
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/// Arbitrate an address
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ResultCode ArbitrateAddress(Handle handle, ArbitrationType type, u32 address, s32 value, u64 nanoseconds) {
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WaitObject* object = static_cast<WaitObject*>(Kernel::g_handle_table.GetGeneric(handle).get());
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if (object == nullptr)
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return InvalidHandle(ErrorModule::Kernel);
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switch (type) {
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// Signal thread(s) waiting for arbitrate address...
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case ArbitrationType::Signal:
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// Negative value means resume all threads
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if (value < 0) {
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ArbitrateAllThreads(object, address);
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} else {
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// Resume first N threads
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for(int i = 0; i < value; i++)
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ArbitrateHighestPriorityThread(object, address);
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}
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break;
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// Wait current thread (acquire the arbiter)...
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case ArbitrationType::WaitIfLessThan:
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if ((s32)Memory::Read32(address) <= value) {
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Kernel::WaitCurrentThread_ArbitrateAddress(object, address);
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HLE::Reschedule(__func__);
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}
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break;
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case ArbitrationType::WaitIfLessThanWithTimeout:
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if ((s32)Memory::Read32(address) <= value) {
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Kernel::WaitCurrentThread_ArbitrateAddress(object, address);
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Kernel::WakeThreadAfterDelay(GetCurrentThread(), nanoseconds);
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HLE::Reschedule(__func__);
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}
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break;
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case ArbitrationType::DecrementAndWaitIfLessThan:
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{
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s32 memory_value = Memory::Read32(address) - 1;
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Memory::Write32(address, memory_value);
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if (memory_value <= value) {
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Kernel::WaitCurrentThread_ArbitrateAddress(object, address);
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HLE::Reschedule(__func__);
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}
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break;
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}
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case ArbitrationType::DecrementAndWaitIfLessThanWithTimeout:
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{
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s32 memory_value = Memory::Read32(address) - 1;
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Memory::Write32(address, memory_value);
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if (memory_value <= value) {
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Kernel::WaitCurrentThread_ArbitrateAddress(object, address);
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Kernel::WakeThreadAfterDelay(GetCurrentThread(), nanoseconds);
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HLE::Reschedule(__func__);
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}
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break;
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}
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default:
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LOG_ERROR(Kernel, "unknown type=%d", type);
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return ResultCode(ErrorDescription::InvalidEnumValue, ErrorModule::Kernel, ErrorSummary::WrongArgument, ErrorLevel::Usage);
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}
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return RESULT_SUCCESS;
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}
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/// Create an address arbiter
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AddressArbiter* CreateAddressArbiter(Handle& handle, const std::string& name) {
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AddressArbiter* address_arbiter = new AddressArbiter;
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// TOOD(yuriks): Fix error reporting
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handle = Kernel::g_handle_table.Create(address_arbiter).ValueOr(INVALID_HANDLE);
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address_arbiter->name = name;
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return address_arbiter;
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}
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/// Create an address arbiter
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Handle CreateAddressArbiter(const std::string& name) {
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Handle handle;
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CreateAddressArbiter(handle, name);
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return handle;
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}
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} // namespace Kernel
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