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pthread_attr_setschedpolicy(3)
NAME
  pthread_attr_setschedpolicy - Changes the scheduling policy attribute of
  the specified thread attributes object

SYNOPSIS
  #include <pthread.h>

  int pthread_attr_setschedpolicy(
	  pthread_attr_t *attr,
	  int policy );

LIBRARY
  DECthreads POSIX 1003.1c Library (libpthread.so)

STANDARDS
  Interfaces documented on this reference page conform to industry standards
  as follows:

  IEEE Std 1003.1c-1995, POSIX System Application Program Interface

PARAMETERS
  attr
      Thread attributes object to be modified.

  policy
      New value for the scheduling policy attribute. Valid values are as
      follows:

	·  SCHED_FIFO, SCHED_RR, SCHED_FG_NP (also known as SCHED_OTHER),
	   SCHED_BG_NP

	·  SCHED_OTHER is the default value.

DESCRIPTION
  This routine sets the scheduling policy of a thread that is created using
  the attributes object specified by the attr argument. The default value of
  the scheduling attribute is SCHED_OTHER.

  By default, a created thread inherits the priority of the thread calling
  pthread_create(3). To specify a policy using this routine, scheduling
  inheritance must be disabled at the time the thread is created. Before
  calling pthread_create(3), call pthread_attr_setinheritsched(3) and specify
  the value PTHREAD_EXPLICIT_SCHED for the inherit argument.

  Never attempt to use scheduling as a mechanism for synchronization.

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 policy is invalid.

ERRORS
  None

SEE ALSO
  Functions: pthread_attr_init(3), pthread_attr_getschedpolicy(3),
  pthread_attr_setinheritsched(3), pthread_attr_setschedparam(3),
  pthread_create(3)

  Manuals: Guide to DECthreads and Programmer's Guide

Index for Section 3

Alphabetical listing for P

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