os::rtos::scheduler Namespace Reference

Scheduler namespace. More...

Namespaces
namespace	statistics
	Scheduler statistics.

Classes
class	critical_section
	Scheduler critical section RAII helper. More...
class	lockable
	Scheduler standard locker. More...
class	uncritical_section
	Scheduler uncritical section RAII helper. More...

Typedefs
using	state_t = port::scheduler::state_t
	Type of variables holding scheduler state codes.

Functions
thread::threads_list &	children_threads (thread *th)
	Get the children threads.
result_t	initialize (void)
	Initialise the RTOS scheduler.
state_t	lock (void)
	Lock the scheduler.
state_t	locked (state_t state)
	Lock/unlock the scheduler.
bool	locked (void)
	Check if the scheduler is locked.
bool	preemptive (bool state)
	Set the scheduler preemptive mode.
bool	preemptive (void)
	Check if the scheduler is in preemptive mode.
void	start (void)
	Start the RTOS scheduler.
bool	started (void)
	Check if the scheduler was started.
state_t	unlock (void)
	Unlock the scheduler.

Detailed Description

Scheduler namespace.

The os::rtos::scheduler namespace groups scheduler types and functions.

Typedef Documentation

state_t

using os::rtos::scheduler::state_t = typedef port::scheduler::state_t

Type of variables holding scheduler state codes.

Usually a boolean telling if the scheduler is locked or not, but for recursive locks it might also be a numeric counter.

Definition at line 202 of file os-decls.h.

Function Documentation

children_threads()

thread::threads_list & os::rtos::scheduler::children_threads

(

thread *

th

)

Get the children threads.

Parameters

[in]

th

Pointer to thread or nullptr.

Returns

Reference to children list.

If the input pointer is nullptr, the function returns the list of top level threads.

Definition at line 261 of file os-core.cpp.

initialize()

result_t os::rtos::scheduler::initialize

(

void

)

Initialise the RTOS scheduler.

Parameters

None.

Return values

result::ok	The scheduler was initialised.
EPERM	Cannot be invoked from an Interrupt Service Routines.

Initialise all RTOS internal objects and be ready to run.

Must be called only once, usually in main().

Warning

Cannot be invoked from Interrupt Service Routines.

Definition at line 160 of file os-core.cpp.

lock()

state_t os::rtos::scheduler::lock ( void  )

inline

Lock the scheduler.

Parameters

None.

Returns

The previous state of the scheduler lock.

Set the scheduler lock state to locked and return the previous state.

Warning

Cannot be invoked from Interrupt Service Routines.

Definition at line 869 of file os-sched.h.

locked() [1/2]

state_t os::rtos::scheduler::locked ( state_t  state )

inline

Lock/unlock the scheduler.

Parameters

[in]

state

The new state of the scheduler lock.

Returns

The previous state of the scheduler lock.

Set the scheduler lock state based on the parameter and return the previous state.

This allows to implement scheduler critical sections, where the scheduler is disabled and context switches are not performed.

Warning

Cannot be invoked from Interrupt Service Routines.

Definition at line 899 of file os-sched.h.

locked() [2/2]

bool os::rtos::scheduler::locked ( void  )

inline

Check if the scheduler is locked.

Parameters

None.

Return values

true	The scheduler is locked.
false	The scheduler is switching threads (not locked).

Check if the scheduler is locked on the current thread or is switching threads from the ready list.

Note

Can be invoked from Interrupt Service Routines.

Definition at line 856 of file os-sched.h.

preemptive() [1/2]

bool os::rtos::scheduler::preemptive

(

bool

state

)

Set the scheduler preemptive mode.

Parameters

[in]

state

The new state of the scheduler preemptive mode.

Returns

The previous state of the preemptive mode.

Warning

Cannot be invoked from Interrupt Service Routines.

Definition at line 227 of file os-core.cpp.

preemptive() [2/2]

bool os::rtos::scheduler::preemptive ( void  )

inline

Check if the scheduler is in preemptive mode.

Parameters

None

Return values

true	The scheduler is in preemptive mode.
false	The scheduler is not in preemptive mode.

Check if the scheduler preemption is enabled.

Note

Can be invoked from Interrupt Service Routines.

Definition at line 839 of file os-sched.h.

start()

void os::rtos::scheduler::start

(

void

)

Start the RTOS scheduler.

Parameters

None.

Returns

Nothing.

The scheduler cannot be stopped, it will run forever, but thread switching can be locked/unlocked.

Warning

Cannot be invoked from Interrupt Service Routines.

Definition at line 189 of file os-core.cpp.

started()

bool os::rtos::scheduler::started ( void  )

inline

Check if the scheduler was started.

Parameters

None.

Return values

true	The scheduler was started.
false	The scheduler was not started.

Check if the scheduler was started, i.e. if scheduler::start() was called.

Note

Can be invoked from Interrupt Service Routines.

Definition at line 827 of file os-sched.h.

unlock()

state_t os::rtos::scheduler::unlock ( void  )

inline

Unlock the scheduler.

Parameters

None.

Returns

The previous state of the scheduler lock.

Set the scheduler lock state to unlocked and return the previous state.

Warning

Cannot be invoked from Interrupt Service Routines.

Definition at line 882 of file os-sched.h.