summaryrefslogtreecommitdiffstats
path: root/src/core/hle/kernel/address_arbiter.h
blob: 1e1f00e60040a544d990cf1185978f544ad2e998 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
// Copyright 2018 yuzu emulator team
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.

#pragma once

#include <memory>
#include <vector>

#include "common/common_types.h"

union ResultCode;

namespace Core {
class System;
}

namespace Kernel {

class Thread;

class AddressArbiter {
public:
    enum class ArbitrationType {
        WaitIfLessThan = 0,
        DecrementAndWaitIfLessThan = 1,
        WaitIfEqual = 2,
    };

    enum class SignalType {
        Signal = 0,
        IncrementAndSignalIfEqual = 1,
        ModifyByWaitingCountAndSignalIfEqual = 2,
    };

    explicit AddressArbiter(Core::System& system);
    ~AddressArbiter();

    AddressArbiter(const AddressArbiter&) = delete;
    AddressArbiter& operator=(const AddressArbiter&) = delete;

    AddressArbiter(AddressArbiter&&) = default;
    AddressArbiter& operator=(AddressArbiter&&) = delete;

    /// Signals an address being waited on with a particular signaling type.
    ResultCode SignalToAddress(VAddr address, SignalType type, s32 value, s32 num_to_wake);

    /// Waits on an address with a particular arbitration type.
    ResultCode WaitForAddress(VAddr address, ArbitrationType type, s32 value, s64 timeout_ns);

private:
    /// Signals an address being waited on.
    ResultCode SignalToAddressOnly(VAddr address, s32 num_to_wake);

    /// Signals an address being waited on and increments its value if equal to the value argument.
    ResultCode IncrementAndSignalToAddressIfEqual(VAddr address, s32 value, s32 num_to_wake);

    /// Signals an address being waited on and modifies its value based on waiting thread count if
    /// equal to the value argument.
    ResultCode ModifyByWaitingCountAndSignalToAddressIfEqual(VAddr address, s32 value,
                                                             s32 num_to_wake);

    /// Waits on an address if the value passed is less than the argument value,
    /// optionally decrementing.
    ResultCode WaitForAddressIfLessThan(VAddr address, s32 value, s64 timeout,
                                        bool should_decrement);

    /// Waits on an address if the value passed is equal to the argument value.
    ResultCode WaitForAddressIfEqual(VAddr address, s32 value, s64 timeout);

    // Waits on the given address with a timeout in nanoseconds
    ResultCode WaitForAddressImpl(VAddr address, s64 timeout);

    // Gets the threads waiting on an address.
    std::vector<std::shared_ptr<Thread>> GetThreadsWaitingOnAddress(VAddr address) const;

    Core::System& system;
};

} // namespace Kernel