chschd.h File Reference

Scheduler macros and structures. More...

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Macros
#define	firstprio(rlp)
	Returns the priority of the first thread on the given ready list.
#define	__sch_get_currthread()
	Current thread pointer get macro.
Wakeup status codes
#define	MSG_OK   (msg_t)0
	Normal wakeup message.
#define	MSG_TIMEOUT   (msg_t)-1
	Wakeup caused by a timeout condition.
#define	MSG_RESET   (msg_t)-2
	Wakeup caused by a reset condition.
Priority constants
#define	NOPRIO   (tprio_t)0
	Ready list header priority.
#define	IDLEPRIO   (tprio_t)1
	Idle priority.
#define	LOWPRIO   (tprio_t)2
	Lowest priority.
#define	NORMALPRIO   (tprio_t)128
	Normal priority.
#define	HIGHPRIO   (tprio_t)255
	Highest priority.
Thread states
#define	CH_STATE_READY   (tstate_t)0
	Waiting on the ready list.
#define	CH_STATE_CURRENT   (tstate_t)1
	Currently running.
#define	CH_STATE_WTSTART   (tstate_t)2
	Just created.
#define	CH_STATE_SUSPENDED   (tstate_t)3
	Suspended state.
#define	CH_STATE_QUEUED   (tstate_t)4
	On a queue.
#define	CH_STATE_WTSEM   (tstate_t)5
	On a semaphore.
#define	CH_STATE_WTMTX   (tstate_t)6
	On a mutex.
#define	CH_STATE_WTCOND   (tstate_t)7
	On a cond.variable.
#define	CH_STATE_SLEEPING   (tstate_t)8
	Sleeping.
#define	CH_STATE_WTEXIT   (tstate_t)9
	Waiting a thread.
#define	CH_STATE_WTOREVT   (tstate_t)10
	One event.
#define	CH_STATE_WTANDEVT   (tstate_t)11
	Several events.
#define	CH_STATE_SNDMSGQ   (tstate_t)12
	Sending a message, in queue.
#define	CH_STATE_SNDMSG   (tstate_t)13
	Sent a message, waiting answer.
#define	CH_STATE_WTMSG   (tstate_t)14
	Waiting for a message.
#define	CH_STATE_FINAL   (tstate_t)15
	Thread terminated.
#define	CH_STATE_NAMES
	Thread states as array of strings.
Thread flags and attributes
#define	CH_FLAG_MODE_MASK   (tmode_t)3U
	Thread memory mode mask.
#define	CH_FLAG_MODE_STATIC   (tmode_t)0U
	Static thread.
#define	CH_FLAG_MODE_HEAP   (tmode_t)1U
	Thread allocated from a Memory Heap.
#define	CH_FLAG_MODE_MPOOL   (tmode_t)2U
	Thread allocated from a Memory Pool.
#define	CH_FLAG_TERMINATE   (tmode_t)4U
	Termination requested flag.

Functions
void	chSchObjectInit (os_instance_t *oip, const os_instance_config_t *oicp)
thread_t *	chSchReadyI (thread_t *tp)
	Inserts a thread in the Ready List placing it behind its peers.
void	chSchGoSleepS (tstate_t newstate)
	Puts the current thread to sleep into the specified state.
msg_t	chSchGoSleepTimeoutS (tstate_t newstate, sysinterval_t timeout)
	Puts the current thread to sleep into the specified state with timeout specification.
void	chSchWakeupS (thread_t *ntp, msg_t msg)
	Wakes up a thread.
void	chSchRescheduleS (void)
	Performs a reschedule if a higher priority thread is runnable.
bool	chSchIsPreemptionRequired (void)
	Evaluates if preemption is required.
void	chSchDoPreemption (void)
	Switches to the first thread on the runnable queue.
void	chSchPreemption (void)
	All-in-one preemption code.
void	chSchDoYieldS (void)
	Yields the time slot.
thread_t *	chSchSelectFirst (void)
	Makes runnable the fist thread in the ready list, does not reschedule internally.
void	ch_sch_prio_insert (ch_queue_t *qp, ch_queue_t *tp)
	Inserts a thread into a priority ordered queue.

Detailed Description

Scheduler macros and structures.

Definition in file chschd.h.