madness::Barrier Class Reference

#include <worldmutex.h>

Collaboration diagram for madness::Barrier:

Public Member Functions
	Barrier (int nthread)
bool	enter (const int id)
	Each thread calls this with its id (0,..,nthread-1) to enter the barrier.
void	register_thread (int id, std::atomic< bool > *pflag)
	Each thread calls this once before first use.

Private Attributes
const int	nthread
AtomicInt	nworking
std::atomic< bool > *	pflags [MAX_NTHREAD]
std::atomic< bool >	sense

Static Private Attributes
static const int	MAX_NTHREAD = 128

Constructor & Destructor Documentation

Barrier()

madness::Barrier::Barrier ( int  nthread )

inline

References nthread, and nworking.

Member Function Documentation

enter()

bool madness::Barrier::enter ( const int  id )

inline

Each thread calls this with its id (0,..,nthread-1) to enter the barrier.

The thread last to enter the barrier returns true. Others return false.

All calls to the barrier must use the same value of nthread.

References madness::cpu_relax(), madness::AtomicInt::dec_and_test(), MADNESS_EXCEPTION, MADNESS_MEMORY_LOAD_BARRIER, MADNESS_MEMORY_STORE_BARRIER, MAX_NTHREAD, nthread, nworking, pflags, and sense.

Referenced by madness::TaskThreadEnv::barrier().

register_thread()

void madness::Barrier::register_thread ( int  id, std::atomic< bool > *  pflag  )

inline

Each thread calls this once before first use.

id should be the thread id (0,..,nthread-1) and pflag a pointer to a thread-local atomic flag (probably in the thread's stack)

References MADNESS_EXCEPTION, MAX_NTHREAD, pflags, and sense.

Member Data Documentation

MAX_NTHREAD

const int madness::Barrier::MAX_NTHREAD = 128

staticprivate

Referenced by enter(), and register_thread().

nthread

const int madness::Barrier::nthread

private

Referenced by Barrier(), and enter().

nworking

AtomicInt madness::Barrier::nworking

private

Referenced by Barrier(), and enter().

pflags

std::atomic<bool>* madness::Barrier::pflags[MAX_NTHREAD]

private

Referenced by enter(), and register_thread().

sense

std::atomic<bool> madness::Barrier::sense

private

Referenced by enter(), and register_thread().

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

• worldmutex.h