pthread_attr_getinheritsched(3) - NetBSD Manual Pages

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PTHREAD_ATTR_GETINHE... NetBSD Library Functions ManualPTHREAD_ATTR_GETINHE...


NAME

     pthread_attr_getinheritedsched -- get and set ``inheritsched'' attribute


LIBRARY

     POSIX Threads Library (libpthread, -lpthread)


SYNOPSIS

     #include <pthread.h>

     int
     pthread_attr_getinheritsched(const pthread_attr_t * restrict attr,
         int * restrict inheritsched);

     int
     pthread_attr_setinheritsched(pthread_attr_t *attr, int inheritsched);


DESCRIPTION

     The pthread_attr_getinheritsched() and pthread_attr_setinheritsched()
     functions get and set, respectively, the inherit scheduler attribute,
     inheritsched, in the attr object.  The inheritsched parameter specifies
     whether a tread created by using attr will obtain its scheduling
     attributes directly from attr or whether it will inherit these from the
     calling thread.

     Two values are possible for inheritsched:

           PTHREAD_INHERIT_SCHED   The thread scheduling attributes will be
                                   inherited from the creating thread and the
                                   ones in attr are ignored.

           PTHREAD_EXPLICIT_SCHED  The thread scheduling attributes will be
                                   set to the corresponding values in attr.

     The following thread scheduling attributes are affected by inheritsched:

           ·   Scheduling policy; see pthread_attr_setschedpolicy(3).

           ·   Scheduling parameter; see pthread_attr_getschedparam(3).

           ·   Scheduling contention scope; see pthread_attr_getscope(3).


RETURN VALUES

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


COMPATIBILITY

     The standard leaves it unspecified which (if any) is the default inherit
     scheduler attribute in a newly initialized attribute object.


ERRORS

     No errors are defined for pthread_attr_getinheritsched().

     The pthread_attr_setinheritsched() function may fail if:

     [EINVAL]           The value specified by inheritsched is invalid.


SEE ALSO

     pthread_attr(3)


STANDARDS

     Both functions conform to IEEE Std 1003.1-2008 (``POSIX.1'').

NetBSD 6.0.2                     July 7, 2010                     NetBSD 6.0.2