pthread_setschedparam(2)                       pthread_setschedparam(2)

  pthread_getschedparam()

  NAME

    pthread_getschedparam(), pthread_setschedparam() - get or set thread
    scheduling settings

  SYNOPSIS

    #include 

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

  DESCRIPTION

    The pthread_setschedparam(2) function sets the scheduling policy and
    parameters of the thread identified by the thread argument using values
    supplied by the policy and param arguments.

    The policy argument can be set to any of the following values:

    *     SCHED_FIFO: Run to completion
    *     SCHED_RR: Round-robin
    *     SCHED_OTHER: Use scheduling values set in the sched_param structure
          referenced by policy.

    The sched_param structure referenced by the param argument is defined in
     and contains the following fields:

    struct sched_param {
        int     sched_priority; /* scheduling priority */
        int     sched_nicelim;  /* nice value limit for SCHED_OTHER policy */
        int     sched_nice;     /* nice value for SCHED_OTHER policy */
        int     sched_pad[6];   /* this is used for padding */
    };

    NOTE: In this version of Interix, the pthread_setschedparam(2) function
    supports only the SCHED_OTHER scheduling policy. Only the sched_priority
    field of the sched_param structure is required.

    The valid range for the priorities is the range returned by
    sched_get_priority_min(2) and sched_get_priority_max(2). The effective
    thread priority is equal to the process priority (determined from the
    nice(2) value of the process) plus the thread priority that is set or
    retrieved by this function.

    The pthread_getschedparam(2) function retrieves the current scheduling
    policy and parameter settings of the thread identified by the thread
    argument and stores these values in the locations referenced by the policy
    and param arguments, respectively.

  RETURN VALUES

    On success, both functions return 0; otherwise, an error code is returned.

  ERRORS

    The pthread_getschedparam() function can fail for the following reason:

    [ESRCH]
        The thread argument does not identify an existing thread.

    The pthread_setschedparam() function can fail for the following reasons:

    [EINVAL]
        The policy argument does not refer to a valid sched_param structure or
        one of the parameters in the structure is invalid.

    [ENOTSUP]
        An attempt was made to set the thread policy or parameters to an
        unsupported value.

    [EPERM]
        The caller does not have the required permissions to set the
        scheduling policy or parameters of the specified thread.

    [ESRCH]
        The thread argument does not identify an existing thread

    Neither function returns [EINTR]..

  SEE ALSO

    pthread_attr_getschedparam(2)

    pthread_attr_getschedpolicy(2)

    pthread_create(2)

    pthread_setschedprio(2)

  USAGE NOTES

    All of these functions are thread safe.

    None of these functions are async-signal safe.