Task Class Reference

#include <Task.h>

Inheritance diagram for Task:

Collaboration diagram for Task:

Public Member Functions
	Task (const char *name, FUNCPTR function, int32_t priority=kDefaultPriority, uint32_t stackSize=20000)
bool	Start (uint32_t arg0=0, uint32_t arg1=0, uint32_t arg2=0, uint32_t arg3=0, uint32_t arg4=0, uint32_t arg5=0, uint32_t arg6=0, uint32_t arg7=0, uint32_t arg8=0, uint32_t arg9=0)
bool	Restart ()
bool	Stop ()
bool	IsReady ()
bool	IsSuspended ()
bool	Suspend ()
bool	Resume ()
bool	Verify ()
int32_t	GetPriority ()
bool	SetPriority (int32_t priority)
const char *	GetName ()
int32_t	GetID ()
Public Member Functions inherited from ErrorBase
virtual Error &	GetError ()
	Retrieve the current error. Get the current error information associated with this sensor.
virtual const Error &	GetError () const
virtual void	SetErrnoError (const char *contextMessage, const char *filename, const char *function, uint32_t lineNumber) const
	Set error information associated with a C library call that set an error to the "errno" global variable. More...
virtual void	SetImaqError (int success, const char *contextMessage, const char *filename, const char *function, uint32_t lineNumber) const
	Set the current error information associated from the nivision Imaq API. More...
virtual void	SetError (Error::Code code, const char *contextMessage, const char *filename, const char *function, uint32_t lineNumber) const
	Set the current error information associated with this sensor. More...
virtual void	SetWPIError (const char *errorMessage, const char *contextMessage, const char *filename, const char *function, uint32_t lineNumber) const
	Set the current error information associated with this sensor. More...
virtual void	CloneError (ErrorBase *rhs) const
virtual void	ClearError () const
	Clear the current error information associated with this sensor.
virtual bool	StatusIsFatal () const
	Check if the current error code represents a fatal error. More...

Static Public Attributes
static const uint32_t	kDefaultPriority = 101
static const int32_t	kInvalidTaskID = -1

Additional Inherited Members
Static Public Member Functions inherited from ErrorBase
static void	SetGlobalError (Error::Code code, const char *contextMessage, const char *filename, const char *function, uint32_t lineNumber)
static void	SetGlobalWPIError (const char *errorMessage, const char *contextMessage, const char *filename, const char *function, uint32_t lineNumber)
static Error &	GetGlobalError ()
Protected Member Functions inherited from ErrorBase
	ErrorBase ()
	Initialize the instance status to 0 for now.
Protected Attributes inherited from ErrorBase
Error	m_error
Static Protected Attributes inherited from ErrorBase
static SEM_ID	_globalErrorMutex = semMCreate(SEM_Q_PRIORITY | SEM_DELETE_SAFE | SEM_INVERSION_SAFE)
static Error	_globalError

Detailed Description

WPI task is a wrapper for the native Task object. All WPILib tasks are managed by a static task manager for simplified cleanup.

Definition at line 17 of file Task.h.

Constructor & Destructor Documentation

Task::Task	(	const char *	name,
		FUNCPTR	function,
		int32_t	priority = kDefaultPriority,
		uint32_t	stackSize = 20000
	)

Create but don't launch a task.

Parameters

name	The name of the task. "FRC_" will be prepended to the task name.
function	The address of the function to run as the new task.
priority	The VxWorks priority for the task.
stackSize	The size of the stack for the task

Definition at line 26 of file Task.cpp.

Member Function Documentation

int32_t Task::GetID

(

)

Get the ID of a task

Returns

Task ID of this task. Task::kInvalidTaskID (-1) if the task has not been started or has already exited.

Definition at line 175 of file Task.cpp.

const char * Task::GetName

(

)

Returns the name of the task.

Returns

Pointer to the name of the task or NULL if not allocated

Definition at line 166 of file Task.cpp.

int32_t Task::GetPriority

(

)

Gets the priority of a task.

Returns

task priority or 0 if an error occured

Definition at line 141 of file Task.cpp.

bool Task::IsReady

(

)

Returns true if the task is ready to execute (i.e. not suspended, delayed, or blocked).

Returns

true if ready, false if not ready.

Definition at line 96 of file Task.cpp.

bool Task::IsSuspended

(

)

Returns true if the task was explicitly suspended by calling Suspend()

Returns

true if suspended, false if not suspended.

Definition at line 105 of file Task.cpp.

bool Task::Restart

(

)

Restarts a running task. If the task isn't started, it starts it.

Returns

false if the task is running and we are unable to kill the previous instance

Definition at line 72 of file Task.cpp.

bool Task::Resume

(

)

Resumes a paused task. Returns true on success, false if unable to resume or if the task isn't running/paused.

Definition at line 123 of file Task.cpp.

bool Task::SetPriority

(

int32_t

priority

)

This routine changes a task's priority to a specified priority. Priorities range from 0, the highest priority, to 255, the lowest priority. Default task priority is 100.

Parameters

priority

The priority the task should run at.

Returns

true on success.

Definition at line 156 of file Task.cpp.

bool Task::Start	(	uint32_t	arg0 = 0,
		uint32_t	arg1 = 0,
		uint32_t	arg2 = 0,
		uint32_t	arg3 = 0,
		uint32_t	arg4 = 0,
		uint32_t	arg5 = 0,
		uint32_t	arg6 = 0,
		uint32_t	arg7 = 0,
		uint32_t	arg8 = 0,
		uint32_t	arg9 = 0
	)

Starts this task. If it is already running or unable to start, it fails and returns false.

Definition at line 52 of file Task.cpp.

bool Task::Stop

(

)

Kills the running task.

Returns

true on success false if the task doesn't exist or we are unable to kill it.

Definition at line 81 of file Task.cpp.

bool Task::Suspend

(

)

Pauses a running task. Returns true on success, false if unable to pause or the task isn't running.

Definition at line 114 of file Task.cpp.

bool Task::Verify

(

)

Verifies a task still exists.

Returns

true on success.

Definition at line 132 of file Task.cpp.

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

• Task.h
• Task.cpp