SMP Barriers

The SMP barrier provides barrier synchronization for SMP systems at the lowest level. More...

Files
file	smpbarrier.h
	SMP Barrier API.

Classes
struct	SMP_barrier_Control
	SMP barrier control. More...
struct	SMP_barrier_State
	SMP barrier per-thread state. More...

Macros
#define	SMP_BARRIER_CONTROL_INITIALIZER   { ATOMIC_INITIALIZER_UINT( 0U ), ATOMIC_INITIALIZER_UINT( 0U ) }
	SMP barrier control initializer for static initialization.
#define	SMP_BARRIER_STATE_INITIALIZER   { 0U }
	SMP barrier per-thread state initializer for static initialization.

Functions
static void	_SMP_barrier_Control_initialize (SMP_barrier_Control *control)
	Initializes a SMP barrier control. More...
static void	_SMP_barrier_State_initialize (SMP_barrier_State *state)
	Initializes a SMP barrier per-thread state. More...
bool	_SMP_barrier_Wait (SMP_barrier_Control *control, SMP_barrier_State *state, unsigned int count)
	Waits on the SMP barrier until count threads rendezvoused. More...

Detailed Description

The SMP barrier provides barrier synchronization for SMP systems at the lowest level.

The SMP barrier is implemented as a sense barrier, see also Herlihy and Shavit, "The Art of Multiprocessor Programming", 17.3 Sense-Reversing Barrier.

Function Documentation

_SMP_barrier_Control_initialize()

static void _SMP_barrier_Control_initialize ( SMP_barrier_Control *  control )

inlinestatic

Initializes a SMP barrier control.

Concurrent initialization leads to unpredictable results.

Parameters

[out]

control

The SMP barrier control.

Definition at line 83 of file smpbarrier.h.

_SMP_barrier_State_initialize()

static void _SMP_barrier_State_initialize ( SMP_barrier_State *  state )

inlinestatic

Initializes a SMP barrier per-thread state.

Parameters

[out]

state

The SMP barrier control.

Definition at line 96 of file smpbarrier.h.

_SMP_barrier_Wait()

bool _SMP_barrier_Wait	(	SMP_barrier_Control *	control,
		SMP_barrier_State *	state,
		unsigned int	count
	)

Waits on the SMP barrier until count threads rendezvoused.

Parameters

[in,out]	control	The SMP barrier control.
[in,out]	state	The SMP barrier per-thread state.
	count	The thread count bound to rendezvous.

Return values

true	This processor performed the barrier release.
false	This processor did not performe the barrier release.

Definition at line 21 of file smpbarrierwait.c.