BodyAccess.h

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// Jolt Physics Library (https://github.com/jrouwe/JoltPhysics)
// SPDX-FileCopyrightText: 2021 Jorrit Rouwe
// SPDX-License-Identifier: MIT
 
#pragma once
 
#ifdef JPH_ENABLE_ASSERTS
 
JPH_NAMESPACE_BEGIN
 
class JPH_EXPORT BodyAccess
{
public:
    enum class EAccess : uint8
    {
        None        = 0,
        Read        = 1,
        ReadWrite   = 3,
    };
 
    class Grant
    {
    public:
        inline                          Grant(EAccess inVelocity, EAccess inPosition)
        {
            EAccess &velocity = sVelocityAccess();
            EAccess &position = sPositionAccess();
 
            JPH_ASSERT(velocity == EAccess::ReadWrite);
            JPH_ASSERT(position == EAccess::ReadWrite);
 
            velocity = inVelocity;
            position = inPosition;
        }
 
        inline                          ~Grant()
        {
            sVelocityAccess() = EAccess::ReadWrite;
            sPositionAccess() = EAccess::ReadWrite;
        }
    };
 
    static inline bool                  sCheckRights(EAccess inRights, EAccess inDesiredRights)
    {
        return (uint8(inRights) & uint8(inDesiredRights)) == uint8(inDesiredRights);
    }
 
    static inline EAccess &             sVelocityAccess()
    {
        static thread_local EAccess sAccess = BodyAccess::EAccess::ReadWrite;
        return sAccess;
    }
 
    static inline EAccess &             sPositionAccess()
    {
        static thread_local EAccess sAccess = BodyAccess::EAccess::ReadWrite;
        return sAccess;
    }
};
 
JPH_NAMESPACE_END
 
#endif // JPH_ENABLE_ASSERTS