mat3 mat3::InvertMatrix()
{
const JFloat determinant = GetDeterminant();
mat3 inverse;
if (determinant != JFloat(0.0))
{
const JFloat inverseDeterminant = 1.0f / determinant;
inverse.column0.x = inverseDeterminant * (column1.y * column2.z - column2.y * column1.z);
inverse.column0.y = inverseDeterminant *-(column0.y * column2.z - column2.y * column0.z);
inverse.column0.z = inverseDeterminant * (column0.y * column1.z - column0.z * column1.y);
inverse.column1.x = inverseDeterminant *-(column1.x * column2.z - column1.z * column2.x);
inverse.column1.y = inverseDeterminant * (column0.x * column2.z - column0.z * column2.x);
inverse.column1.z = inverseDeterminant *-(column0.x * column1.z - column0.z * column1.x);
inverse.column2.x = inverseDeterminant * (column1.x * column2.y - column1.y * column2.x);
inverse.column2.y = inverseDeterminant *-(column0.x * column2.y - column0.y * column2.x);
inverse.column2.z = inverseDeterminant * (column0.x * column1.y - column1.x * column0.y);
return inverse;
}
else
{
return CreateIdentity();
}
}
void
GPMProcessEntry::Update
(
const JFloat elapsedTime
)
{
itsPercentMemory = 0;
#ifdef _J_HAS_PROC
try
{
ReadStat();
ReadStatM();
JSize mem;
if (GPMGetSystemMemory(&mem))
{
itsPercentMemory = JFloat(itsResident * 100) / mem;
}
// shared across #if
ReadCmdline(); // not in ctor, to make ctor faster
}
catch (...)
{
itsState = kZombie;
// std::cerr << "failed to update: " << itsPID << std::endl;
}
#elif defined _J_HAS_SYSCTL
{
int mib[] = { CTL_KERN, KERN_PROC, KERN_PROC_PID, itsPID };
kinfo_proc entry;
size_t len = sizeof(entry);
int result = sysctl(mib, 4, &entry, &len, NULL, 0);
if (result != 0)
{
itsState = kZombie;
}
else
{
itsCommand = entry.kp_proc.p_comm;
itsPPID = entry.kp_eproc.e_ppid;
itsPriority = entry.kp_proc.p_priority;
itsNice = entry.kp_proc.p_nice;
itsSize = 0;
itsResident = 0;
itsShare = 0;
itsUTime = entry.kp_proc.p_uticks;
itsSTime = entry.kp_proc.p_sticks;
if (entry.kp_proc.p_stat == SSLEEP)
{
itsState = kSleep;
}
else if (entry.kp_proc.p_stat == SSTOP)
{
itsState = kStopped;
}
else if (entry.kp_proc.p_stat == SZOMB)
{
itsState = kZombie;
}
else
{
itsState = kRun;
}
JSize mem;
if (GPMGetSystemMemory(&mem))
{
itsPercentMemory = JFloat(itsResident) / mem;
}
}
// shared across #if
ReadCmdline(); // not in ctor, to make ctor faster
}
#endif
SetName(itsCommand);
ShouldBeOpenable(HasChildren());
itsTime = (itsUTime + itsSTime) / sysconf(_SC_CLK_TCK);
JSize totalTime = (itsLastUTime == 0 || itsLastSTime == 0) ? 0 : (itsUTime - itsLastUTime) + (itsSTime - itsLastSTime);
itsLastUTime = itsUTime;
itsLastSTime = itsSTime;
itsPercentCPU = elapsedTime == 0 || itsState == kZombie ? 0 : JFloat(totalTime * 1000 / sysconf(_SC_CLK_TCK)) / (10 * elapsedTime);
}
mat3 mat3::CreateIdentity()
{
return mat3(JFloat(0.0));
}
