pthread_schedparam(3) - NetBSD Manual Pages

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PTHREAD_SCHEDPARAM(3)   NetBSD Library Functions Manual  PTHREAD_SCHEDPARAM(3)


NAME

     pthread_setschedparam, pthread_getschedparam -- thread scheduling parame-
     ter manipulation


LIBRARY

     POSIX Threads Library (libpthread, -lpthread)


SYNOPSIS

     #include <pthread.h>

     int
     pthread_setschedparam(pthread_t thread, int policy,
         const struct sched_param *param);

     int
     pthread_getschedparam(pthread_t thread, int * restrict policy,
         struct sched_param * restrict param);


DESCRIPTION

     The pthread_setschedparam() and pthread_getschedparam() functions set and
     get the scheduling parameters of individual threads.  The scheduling pol-
     icy for a thread can be:

           SCHED_FIFO   First in, first out.

           SCHED_RR     Round-robin.

           SCHED_OTHER  The system default.

     The thread priority (accessed via param->sched_priority) must be at least
     PTHREAD_MIN_PRIORITY and no more than PTHREAD_MAX_PRIORITY.


RETURN VALUES

     If successful, these functions return 0.  Otherwise, an error number is
     returned to indicate the error.


ERRORS

     pthread_setschedparam() may fail if:

     [EINVAL]           The value specified by policy is invalid.

     [ENOTSUP]          Invalid value for scheduling parameters.

     [ESRCH]            Non-existent thread thread.

     pthread_getschedparam() may fail if:

     [ESRCH]            Non-existent thread thread.


SEE ALSO

     pthread_attr_getschedparam(3), sched(3)


STANDARDS

     Both functions conform to IEEE Std 1003.1-2001 (``POSIX.1'').

NetBSD 8.0                       July 9, 2010                       NetBSD 8.0