summaryrefslogblamecommitdiffstats
path: root/src/core/hle/kernel/address_arbiter.cpp
blob: ce4f3c854474206f0e99e0c5a017a545590ca7cb (plain) (tree)


















                                                                                                    

                                                                  

                                                                                          
                                                                                            


                                                                      
                                                    

                                            
                                                      





                                                                                                    
                                                                                          











                                                                
              



                                                    
                                                                     

                                      
              


                                                   
                                                                                                                                   
     
                          

















                                                                               
// Copyright 2014 Citra Emulator Project
// Licensed under GPLv2
// Refer to the license.txt file included.

#include "common/common_types.h"

#include "core/mem_map.h"

#include "core/hle/hle.h"
#include "core/hle/kernel/address_arbiter.h"
#include "core/hle/kernel/thread.h"

////////////////////////////////////////////////////////////////////////////////////////////////////
// Kernel namespace

namespace Kernel {

class AddressArbiter : public Object {
public:
    std::string GetTypeName() const override { return "Arbiter"; }
    std::string GetName() const override { return name; }

    static Kernel::HandleType GetStaticHandleType() { return HandleType::AddressArbiter; }
    Kernel::HandleType GetHandleType() const override { return HandleType::AddressArbiter; }

    std::string name;   ///< Name of address arbiter object (optional)

    ResultVal<bool> WaitSynchronization() override {
        // TODO(bunnei): ImplementMe
        ERROR_LOG(OSHLE, "(UNIMPLEMENTED)");
        return UnimplementedFunction(ErrorModule::OS);
    }
};

////////////////////////////////////////////////////////////////////////////////////////////////////

/// Arbitrate an address
ResultCode ArbitrateAddress(Handle handle, ArbitrationType type, u32 address, s32 value) {
    switch (type) {

    // Signal thread(s) waiting for arbitrate address...
    case ArbitrationType::Signal:
        // Negative value means resume all threads
        if (value < 0) {
            ArbitrateAllThreads(handle, address);
        } else {
            // Resume first N threads
            for(int i = 0; i < value; i++)
                ArbitrateHighestPriorityThread(handle, address);
        }
        break;

    // Wait current thread (acquire the arbiter)...
    case ArbitrationType::WaitIfLessThan:
        if ((s32)Memory::Read32(address) <= value) {
            Kernel::WaitCurrentThread(WAITTYPE_ARB, handle, address);
            HLE::Reschedule(__func__);
        }
        break;

    default:
        ERROR_LOG(KERNEL, "unknown type=%d", type);
        return ResultCode(ErrorDescription::InvalidEnumValue, ErrorModule::Kernel, ErrorSummary::WrongArgument, ErrorLevel::Usage);
    }
    return RESULT_SUCCESS;
}

/// Create an address arbiter
AddressArbiter* CreateAddressArbiter(Handle& handle, const std::string& name) {
    AddressArbiter* address_arbiter = new AddressArbiter;
    handle = Kernel::g_object_pool.Create(address_arbiter);
    address_arbiter->name = name;
    return address_arbiter;
}

/// Create an address arbiter
Handle CreateAddressArbiter(const std::string& name) {
    Handle handle;
    CreateAddressArbiter(handle, name);
    return handle;
}

} // namespace Kernel