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pthread_cond_signal_int_np(3)
NAME
  pthread_cond_signal_int_np - Wakes one thread that is waiting on the
  specified condition variable (called from interrupt level only)

SYNOPSIS
  #include <pthread.h>

  int pthread_cond_signal_int_np(
	  pthread_cond_t *cond );

LIBRARY
  DECthreads POSIX 1003.1c Library (libpthread.so)

STANDARDS
  None

PARAMETERS
  cond
      Condition variable to be signaled.

DESCRIPTION
  This routine wakes one thread waiting on the specified condition variable.
  It can only be called from a software interrupt handler routine (that is,
  from a Tru64 UNIX signal handler or OpenVMS AST). Calling this routine
  implies that it might be possible for a single waiting thread to proceed.

  The scheduling policies of the waiting threads determine which thread is
  awakened. For policies SCHED_FIFO and SCHED_RR, a blocked thread is chosen
  in priority order, using first-in/first-out (FIFO) within priorities.

  This routine does not cause a thread blocked on a condition variable to
  resume execution immediately. A thread resumes execution at some time after
  the interrupt handler routine returns.

  You can call this routine regardless of whether the associated mutex is
  locked (by some other thread). Never lock a mutex from an interrupt handler
  routine.

  Note This routine allows you to signal a thread from a software interrupt
  handler. Do not call this routine from noninterrupt code. To signal a
  thread from the normal noninterrupt level, use pthread_cond_signal(3).

RETURN VALUES
  If an error condition occurs, this routine returns an integer value
  indicating the type of error. Possible return values are as follows:

  0   Successful completion.

  [EINVAL]
      The value specified by cond is invalid.

ERRORS
  None

SEE ALSO
  Functions: pthread_cond_broadcast(3), pthread_cond_signal(3),
  pthread_cond_timedwait(3), pthread_cond_wait(3)

  Manuals: Guide to DECthreads and Programmer's Guide

Index for Section 3

Alphabetical listing for P

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