KisLockFreeLodCounter Class Reference

#include <kis_lock_free_lod_counter.h>

Public Member Functions
void	addLod (int newLod)
int	readLod () const
void	removeLod ()
void	testingClear ()

Static Private Member Functions
static int	packLod (int counter, int lod)
static void	unpackLod (int value, int *counter, int *lod)

Private Attributes
QAtomicInt	m_num

Detailed Description

Definition at line 13 of file kis_lock_free_lod_counter.h.

Member Function Documentation

addLod()

void KisLockFreeLodCounter::addLod ( int newLod )

inline

Definition at line 16 of file kis_lock_free_lod_counter.h.

                            {
        int oldValue = 0;
        int newValue = 0;
 
        do {
            oldValue = m_num;
 
            int counter;
            int lod;
            unpackLod(oldValue, &counter, &lod);
 
            if (!counter) {
                lod = newLod;
            } else {
                Q_ASSERT(lod == newLod);
            }
 
            counter++;
            newValue = packLod(counter, lod);
        } while(!m_num.testAndSetOrdered(oldValue, newValue));
    }

References m_num, packLod(), and unpackLod().

packLod()

static int KisLockFreeLodCounter::packLod ( int counter, int lod )

inlinestaticprivate

Definition at line 69 of file kis_lock_free_lod_counter.h.

                                                    {
        return (counter << 8) | (lod & 0xFF);
    }

readLod()

int KisLockFreeLodCounter::readLod ( ) const

inline

Definition at line 56 of file kis_lock_free_lod_counter.h.

                        {
        int counter = 0;
        int lod = 0;
        unpackLod(m_num, &counter, &lod);
 
        return counter ? lod : -1;
    }

References m_num, and unpackLod().

removeLod()

void KisLockFreeLodCounter::removeLod ( )

inline

Definition at line 38 of file kis_lock_free_lod_counter.h.

                     {
        int oldValue = 0;
        int newValue = 0;
 
        do {
            oldValue = m_num;
 
            int counter;
            int lod;
            unpackLod(oldValue, &counter, &lod);
 
            Q_ASSERT(counter > 0);
 
            counter--;
            newValue = packLod(counter, lod);
        } while(!m_num.testAndSetOrdered(oldValue, newValue));
    }

References m_num, packLod(), and unpackLod().

testingClear()

void KisLockFreeLodCounter::testingClear ( )

inline

Definition at line 64 of file kis_lock_free_lod_counter.h.

                        {
        m_num = 0;
    }

References m_num.

unpackLod()

static void KisLockFreeLodCounter::unpackLod ( int value, int * counter, int * lod )

inlinestaticprivate

Definition at line 73 of file kis_lock_free_lod_counter.h.

                                                                    {
        *lod = value & 0xFF;
        *counter = value >> 8;
    }

References value().

Member Data Documentation

m_num

QAtomicInt KisLockFreeLodCounter::m_num

private

Definition at line 79 of file kis_lock_free_lod_counter.h.

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The documentation for this class was generated from the following file:

• libs/image/kis_lock_free_lod_counter.h