PxTask.h

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// Copyright (c) 2008-2022 NVIDIA Corporation. All rights reserved.
 
#ifndef PX_TASK_H
#define PX_TASK_H
 
#include "task/PxTaskManager.h"
#include "task/PxCpuDispatcher.h"
#include "foundation/PxAssert.h"
 
#if !PX_DOXYGEN
namespace physx
{
#endif
 
class PxBaseTask
{
public:
    PxBaseTask() : mContextID(0), mTm(NULL) {}
    virtual ~PxBaseTask() {}
 
    virtual void        run() = 0;
 
    virtual const char* getName() const = 0;
 
    virtual void        addReference() = 0;
    virtual void        removeReference() = 0;
    virtual int32_t     getReference() const = 0;
 
    virtual void        release() = 0;
 
    PX_FORCE_INLINE PxTaskManager* getTaskManager() const
    {
        return mTm;
    }
 
    PX_FORCE_INLINE void    setContextId(PxU64 id)          { mContextID = id;      }
    PX_FORCE_INLINE PxU64   getContextId()          const   { return mContextID;    }
 
protected:
    PxU64               mContextID;     
    PxTaskManager*      mTm;            
 
    friend class PxTaskMgr;
};
 
 
class PxTask : public PxBaseTask
{
public:
    PxTask() : mTaskID(0) {}
    virtual ~PxTask() {}
 
    virtual void release() PX_OVERRIDE
    {
        PX_ASSERT(mTm);
 
        // clear mTm before calling taskCompleted() for safety
        PxTaskManager* save = mTm;
        mTm = NULL;
        save->taskCompleted(*this);
    }
 
    //         task is allowed to start.
    PX_INLINE void finishBefore(PxTaskID taskID)
    {
        PX_ASSERT(mTm);
        mTm->finishBefore(*this, taskID);
    }
 
    //         task has completed.
    PX_INLINE void startAfter(PxTaskID taskID)
    {
        PX_ASSERT(mTm);
        mTm->startAfter(*this, taskID);
    }
 
    virtual void addReference() PX_OVERRIDE
    {
        PX_ASSERT(mTm);
        mTm->addReference(mTaskID);
    }
 
    virtual void removeReference() PX_OVERRIDE
    {
        PX_ASSERT(mTm);
        mTm->decrReference(mTaskID);
    }
 
    virtual int32_t getReference() const PX_OVERRIDE
    {
        return mTm->getReference(mTaskID);
    }
    
    PX_INLINE PxTaskID      getTaskID() const
    {
        return mTaskID;
    }
 
    virtual void submitted()
    {
    }
 
protected:
    PxTaskID            mTaskID;            
 
    friend class PxTaskMgr;
};
 
 
class PxLightCpuTask : public PxBaseTask
{
public:
    PxLightCpuTask()
        : mCont( NULL )
        , mRefCount( 0 )
    {
    }
    virtual ~PxLightCpuTask()
    {
        mTm = NULL;
    }
 
    PX_INLINE void setContinuation(PxTaskManager& tm, PxBaseTask* c)
    {
        PX_ASSERT(mRefCount == 0);
        mRefCount = 1;
        mCont = c;
        mTm = &tm;
        if(mCont)
            mCont->addReference();
    }
 
    PX_INLINE void setContinuation(PxBaseTask* c)
    {
        PX_ASSERT(c);
        PX_ASSERT(mRefCount == 0);
        mRefCount = 1;
        mCont = c;
        if(mCont)
        {
            mCont->addReference();
            mTm = mCont->getTaskManager();
            PX_ASSERT(mTm);
        }
    }
 
    PX_INLINE PxBaseTask*   getContinuation()   const
    {
        return mCont;
    }
 
    virtual void removeReference() PX_OVERRIDE
    {
        mTm->decrReference(*this);
    }
 
    virtual int32_t getReference() const PX_OVERRIDE
    {
        return mRefCount;
    }
 
    virtual void addReference() PX_OVERRIDE
    {
        mTm->addReference(*this);
    }
 
    virtual void release() PX_OVERRIDE
    {
        if(mCont)
            mCont->removeReference();
    }
 
protected:
 
    PxBaseTask*         mCont;          
    volatile int32_t    mRefCount;      
 
    friend class PxTaskMgr;
};
 
 
#if !PX_DOXYGEN
} // namespace physx
#endif
 
 
#endif