pthread_getschedparam(3) [osf1 man page]

pthread_getschedparam(3)				     Library Functions Manual					  pthread_getschedparam(3)

NAME

       pthread_getschedparam - Obtains the current scheduling policy and scheduling parameters of a thread.

LIBRARY

       DECthreads POSIX 1003.1c Library (libpthread.so)

SYNOPSIS

       #include <pthread.h>

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

STANDARDS

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

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

PARAMETERS

       Thread  whose  scheduling  policy  and  parameters  are	obtained.  Receives the value of the scheduling policy for the thread specified in
       thread.	Refer to the description of the pthread_setschedparam(3) routine for valid parameters and their meanings.  Receives the  value	of
       the  scheduling	parameters for the thread specified in thread.	Refer to the description of the pthread_setschedparam(3) routine for valid
       values.

DESCRIPTION

       This routine obtains both the current scheduling policy and associated scheduling parameters of the thread specified by	the  thread  argu-
       ment.

       The  priority  value returned in the param structure is the value specified in the attr argument passed to pthread_create(3) or by the most
       recent call to pthread_setschedparam(3) that affects the target thread.

       This routine differs from pthread_attr_getschedpolicy(3) and pthread_attr_getschedparam(3), in that those routines get the scheduling  pol-
       icy  and  parameter attributes that are used to establish the priority and scheduling policy of a new thread when it is created.  This rou-
       tine, however, obtains the scheduling policy and parameters of an existing thread.

RETURN VALUES

       If an error condition occurs, this routine returns an integer value indicating the type of error.  Possible return values are  as  follows:
       Successful completion.  The value specified by thread does not refer to an existing thread.

ERRORS

       None

RELATED INFORMATION

       Functions: pthread_attr_getschedparam(3), pthread_attr_getschedpolicy(3), pthread_create(3), pthread_self(3), pthread_setschedparam(3)

       Manuals: Guide to DECthreads and Programmer's Guide

       delim off

															  pthread_getschedparam(3)

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PTHREAD_SETSCHEDPARAM(3)				     Library Functions Manual					  PTHREAD_SETSCHEDPARAM(3)

NAME

       pthread_setschedparam, pthread_getschedparam - control thread scheduling parameters

SYNOPSIS

       #include <pthread.h>

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

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

DESCRIPTION

       pthread_setschedparam  sets  the scheduling parameters for the thread target_thread as indicated by policy and param.  policy can be either
       SCHED_OTHER (regular, non-realtime scheduling), SCHED_RR (realtime, round-robin) or SCHED_FIFO (realtime, first-in first-out).  param spec-
       ifies the scheduling priority for the two realtime policies.  See sched_setpolicy(2) for more information on scheduling policies.

       The realtime scheduling policies SCHED_RR and SCHED_FIFO are available only to processes with superuser privileges.

       pthread_getschedparam  retrieves  the  scheduling policy and scheduling parameters for the thread target_thread and store them in the loca-
       tions pointed to by policy and param, respectively.

RETURN VALUE

       pthread_setschedparam and pthread_getschedparam return 0 on success and a non-zero error code on error.

ERRORS

       On error, pthread_setschedparam returns the following error codes:

	      EINVAL policy is not one of SCHED_OTHER, SCHED_RR, SCHED_FIFO

	      EINVAL the priority value specified by param is not valid for the specified policy

	      EPERM  the calling process does not have superuser permissions

	      ESRCH  the target_thread is invalid or has already terminated

	      EFAULT param points outside the process memory space

       On error, pthread_getschedparam returns the following error codes:

	      ESRCH  the target_thread is invalid or has already terminated

	      EFAULT policy or param point outside the process memory space

AUTHOR

       Xavier Leroy <Xavier.Leroy@inria.fr>

SEE ALSO

       sched_setscheduler(2), sched_getscheduler(2), sched_getparam(2), pthread_attr_setschedpolicy(3), pthread_attr_setschedparam(3).

								   LinuxThreads 					  PTHREAD_SETSCHEDPARAM(3)

Linux and UNIX Man Pages

pthread_getschedparam(3) [osf1 man page]

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