_lwp_cond_signal(2) System Calls _lwp_cond_signal(2)
NAME
_lwp_cond_signal, _lwp_cond_broadcast - signal a condition variable
SYNOPSIS
#include <sys/lwp.h>
int _lwp_cond_signal(lwp_cond_t *cvp);
int _lwp_cond_broadcast(lwp_cond_t *cvp);
DESCRIPTION
The _lwp_cond_signal() function unblocks one LWP that is blocked on the LWP condition variable pointed to by cvp.
The _lwp_cond_broadcast() function unblocks all LWPs that are blocked on the LWP condition variable pointed to by cvp.
If no LWPs are blocked on the LWP condition variable, then _lwp_cond_signal() and _lwp_cond_broadcast() have no effect.
Both functions should be called under the protection of the same LWP mutex lock that is used with the LWP condition variable being sig-
naled. Otherwise, the condition variable may be signalled between the test of the associated condition and blocking in _lwp_cond_wait().
This can cause an infinite wait.
RETURN VALUES
Upon successful completion, 0 is returned. A non-zero value indicates an error.
ERRORS
The _lwp_cond_signal() and _lwp_cond_broadcast() functions will fail if:
EINVAL The cvp argument points to an invalid LWP condition variable.
EFAULT The cvp argument points to an invalid address.
SEE ALSO
_lwp_cond_wait(2), _lwp_mutex_lock(2)
SunOS 5.10 8 Dec 1995 _lwp_cond_signal(2)
