Base class for realtime scheduling policies. More...

#include <Scheduler.hxx>

Inheritance diagram for cosmos::RealTimeSchedulerSettings:

Public Member Functions
	RealTimeSchedulerSettings (const SchedulerPolicy policy)

void	setPriority (const int priority)

int	priority () const

int	minPriority () const

int	maxPriority () const

Public Member Functions inherited from cosmos::SchedulerSettings
	SchedulerSettings (const SchedulerPolicy policy)

SchedulerPolicy	policy () const

void	apply (ProcessID pid) const
	Apply the current scheduler settings to the given process.

Protected Member Functions
void	fillStruct (struct sched_attr &attr) const override
	Fill the given low level sched_attr struct with the current settings.

Protected Member Functions inherited from cosmos::SchedulerSettings

Protected Attributes
int	m_priority = 0

Protected Attributes inherited from cosmos::SchedulerSettings
SchedulerPolicy	m_policy = SchedulerPolicy::INVALID

Detailed Description

Base class for realtime scheduling policies.

Realtime scheduling uses priorities between an integer min priority and an integer max priority. These boundaries are determines during runtime but are currently set on Linux to 1 .. 99. Higher values mean higher priorities.

A thread with realtime scheduling always has a higher priority than threads with non-realtime scheduling.

Definition at line 125 of file Scheduler.hxx.

Constructor & Destructor Documentation

◆ RealTimeSchedulerSettings()

cosmos::RealTimeSchedulerSettings::RealTimeSchedulerSettings ( const SchedulerPolicy policy )

inlineexplicit

Definition at line 129 of file Scheduler.hxx.

                                                                         :
                SchedulerSettings{policy}
        {}

Member Function Documentation

◆ fillStruct()

void cosmos::RealTimeSchedulerSettings::fillStruct ( struct sched_attr & attr ) const

overrideprotectedvirtual

Fill the given low level sched_attr struct with the current settings.

Implements cosmos::SchedulerSettings.

Definition at line 64 of file Scheduler.cxx.

                                                                 {
        SchedulerSettings::fillStruct(attr);
        attr.sched_priority = m_priority;
}

◆ maxPriority()

int cosmos::RealTimeSchedulerSettings::maxPriority ( ) const

Definition at line 40 of file Scheduler.cxx.

                                                 {
        auto ret = sched_get_priority_max(static_cast<int>(m_policy));
 
        if (ret == -1) {
                cosmos_throw (ApiError("sched_get_priority_max()"));
        }
 
        return ret;
}

◆ minPriority()

int cosmos::RealTimeSchedulerSettings::minPriority ( ) const

Definition at line 30 of file Scheduler.cxx.

                                                 {
        auto ret = sched_get_priority_min(static_cast<int>(m_policy));
 
        if (ret == -1) {
                cosmos_throw (ApiError("sched_get_priority_min()"));
        }
 
        return ret;
}

◆ priority()

int cosmos::RealTimeSchedulerSettings::priority ( ) const

inline

Definition at line 137 of file Scheduler.hxx.

137{ return m_priority; }

◆ setPriority()

void cosmos::RealTimeSchedulerSettings::setPriority ( const int priority )

inline

Definition at line 133 of file Scheduler.hxx.

                                             {
                m_priority = priority;
        }

Member Data Documentation

◆ m_priority

int cosmos::RealTimeSchedulerSettings::m_priority = 0

protected

Definition at line 148 of file Scheduler.hxx.

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

include/proc/Scheduler.hxx
src/proc/Scheduler.cxx

Public Member Functions

Protected Member Functions

Protected Attributes