qthread_syncvar_empty - Man Page

#include <qthread.h>

int
qthread_syncvar_empty (syncvar_t *dest);

int
qthread_syncvar_fill (syncvar_t *dest);

The qthread_syncvar_empty() and qthread_syncvar_fill() functions assert the empty or full state of the given dest addresses. They do not wait for the addresses to be in any particular state.

On success, the full/empty bits are modified and 0 is returned. On error, an non-zero error code is returned.

QTHREAD_TIMEOUT

Could not obtain the lock on the syncvar_t's status bits. This may be caused by many things, including memory corruption, invalid syncvar, or even absurdly excessive contention (because its protected by a naive spinlock rather than a fair spinlock).

qthread_syncvar_writeF(3), qthread_syncvar_writeEF(3), qthread_syncvar_readFF(3), qthread_syncvar_readFE(3)

qthread_syncvar_readFE(3), qthread_syncvar_readFF(3), qthread_syncvar_status(3), qthread_syncvar_writeEF(3), qthread_syncvar_writeF(3).