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man:pthread_attr_setschedparam

PTHREAD_ATTR_SETSCHEDPARAM(Linux Programmer's ManPTHREAD_ATTR_SETSCHEDPARAM(3)

NAME

     pthread_attr_setschedparam, pthread_attr_getschedparam - set/get sched-
     uling parameter attributes in thread attributes object

SYNOPSIS

     #include <pthread.h>
     int pthread_attr_setschedparam(pthread_attr_t *attr,
                                    const struct sched_param *param);
     int pthread_attr_getschedparam(const pthread_attr_t *attr,
                                    struct sched_param *param);
     Compile and link with -pthread.

DESCRIPTION

     The pthread_attr_setschedparam() function sets the scheduling parameter
     attributes  of  the thread attributes object referred to by attr to the
     values specified in the buffer pointed to by param.   These  attributes
     determine  the  scheduling  parameters  of  a  thread created using the
     thread attributes object attr.
     The  pthread_attr_getschedparam()  returns  the  scheduling   parameter
     attributes  of  the thread attributes object attr in the buffer pointed
     to by param.
     Scheduling parameters are maintained in the following structure:
         struct sched_param {
             int sched_priority;     /* Scheduling priority */ };
     As can be seen,  only  one  scheduling  parameter  is  supported.   For
     details  of  the  permitted  ranges  for  scheduling priorities in each
     scheduling policy, see sched(7).
     In order for the parameter setting made by pthread_attr_setschedparam()
     to  have  effect  when  calling  pthread_create(3), the caller must use
     pthread_attr_setinheritsched(3) to set the inherit-scheduler  attribute
     of the attributes object attr to PTHREAD_EXPLICIT_SCHED.

RETURN VALUE

     On  success,  these functions return 0; on error, they return a nonzero
     error number.

ERRORS

     pthread_attr_setschedparam() can fail with the following error:
     EINVAL The priority specified in param does not make sense for the cur-
            rent scheduling policy of attr.
     POSIX.1  also  documents  an  ENOTSUP  error for pthread_attr_setsched-
     param().  This value is never  returned  on  Linux  (but  portable  and
     future-proof  applications should nevertheless handle this error return
     value).

ATTRIBUTES

     For  an  explanation  of  the  terms  used   in   this   section,   see
     attributes(7).
     +------------------------------+---------------+---------+
     |Interface                     | Attribute     | Value   |
     +------------------------------+---------------+---------+
     |pthread_attr_setschedparam(), | Thread safety | MT-Safe |
     |pthread_attr_getschedparam()  |               |         |
     +------------------------------+---------------+---------+

CONFORMING TO

     POSIX.1-2001, POSIX.1-2008.

NOTES

     See pthread_attr_setschedpolicy(3) for a list of the thread  scheduling
     policies supported on Linux.

EXAMPLE

     See pthread_setschedparam(3).

SEE ALSO

     sched_get_priority_min(2), pthread_attr_init(3),
     pthread_attr_setinheritsched(3), pthread_attr_setschedpolicy(3),
     pthread_create(3), pthread_setschedparam(3), pthread_setschedprio(3),
     pthreads(7), sched(7)

COLOPHON

     This page is part of release 4.16 of the Linux man-pages project.  A
     description of the project, information about reporting bugs, and the
     latest version of this page, can be found at
     https://www.kernel.org/doc/man-pages/.

Linux 2017-09-15 PTHREAD_ATTR_SETSCHEDPARAM(3)

/data/webs/external/dokuwiki/data/pages/man/pthread_attr_setschedparam.txt · Last modified: 2019/05/17 09:32 by 127.0.0.1

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