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System Calls                                    processor_bind(2)



NAME
     processor_bind - bind LWPs to a processor

SYNOPSIS
     #include <sys/types.h>
     #include <sys/processor.h>
     #include <sys/procset.h>

     int processor_bind(idtype_t idtype, id_t  id,  processorid_t
     processorid, processorid_t *obind);

DESCRIPTION
     The processor_bind() function  binds  the  LWP  (lightweight
     process)  or  set  of LWPs specified by idtype and id to the
     processor specified by  processorid. If  obind is not  NULL,
     this  function  also sets the processorid_t variable pointed
     to by obind to the previous binding of one of the  specified
     LWPs, or to PBIND_NONE if the selected LWP was not bound.

     If idtype is P_PID, the binding affects all LWPs of the pro-
     cess with process ID (PID) id.

     If idtype is P_LWPID, the binding affects  the  LWP  of  the
     current process with LWP ID id.

     If idtype is P_TASKID, the binding affects all LWPs  of  all
     processes with task ID id.

     If idtype is P_PROJID, the binding affects all LWPs  of  all
     processes with project ID id.

     If id is P_MYID, the specified LWP, process, task,  or  pro-
     cess is the current one.

     If processorid is PBIND_NONE, the processor bindings of  the
     specified LWPs are cleared.

     If  processorid is PBIND_QUERY, the processor  bindings  are
     not changed.

     The effective user of the calling process must be superuser,
     or  its  real  or  effective  user ID must match the real or
     effective user ID of the LWPs being bound.  If  the  calling
     process does not have permission to change all of the speci-
     fied LWPs, the bindings of the LWPs for which it  does  have
     permission will be changed even though an error is returned.

     Processor bindings are inherited across fork(2) and exec(2).

RETURN VALUES
     Upon successful completion, 0 is returned.  Otherwise, -1 is
     returned and  errno is set to indicate the error.



SunOS 5.9           Last change: 11 Aug 2001                    1






System Calls                                    processor_bind(2)



ERRORS
     The processor_bind() function will fail if:

     EFAULT
           The location pointed to by  obind was not NULL and not
           writable by the user.

     EINVAL
           The specified processor is not on-line, or the  idtype
           argument   was   not   P_PID,  P_LWPID,  P_PROJID,  or
           P_TASKID.

     EPERM The effective user  of  the  calling  process  is  not
           superuser,  and its real or effective user ID does not
           match the real or effective user ID of one of the LWPs
           being bound.

     ESRCH No processes, LWPs, or tasks were found to  match  the
           criteria specified by  idtype and  id.

ATTRIBUTES
     See attributes(5) for descriptions of the  following  attri-
     butes:

     ____________________________________________________________
    |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
    |_____________________________|_____________________________|
    | Interface Stability         | Stable                      |
    |_____________________________|_____________________________|
    | MT-Level                    | Async-Signal-Safe           |
    |_____________________________|_____________________________|


SEE ALSO
     psradm(1M),  psrinfo(1M),  exec(2),  fork(2),   p_online(2),
     pset_bind(2), sysconf(3C), project(4)



















SunOS 5.9           Last change: 11 Aug 2001                    2