listing for P
pthread_attr_setinheritsched - Changes the inherit scheduling attribute of
the specified thread attributes object
int inheritsched );
DECthreads POSIX 1003.1c Library (libpthread.so)
Interfaces documented on this reference page conform to industry standards
IEEE Std 1003.1c-1995, POSIX System Application Program Interface
Thread attributes object whose inherit scheduling attribute is to be
New value for the inherit scheduling attribute. Valid values are as
The created thread inherits the scheduling policy and
associated scheduling attributes of the thread calling
pthread_create(3). Any scheduling attributes in the attributes
object specified by the pthread_create(3) attr argument are
ignored during thread creation. This is the default value.
The scheduling policy and associated scheduling attributes of
the created thread are set to the corresponding values from the
attribute object specified by the pthread_create(3) attr
This routine changes the inherit scheduling attribute of the thread
attributes object specified by the attr argument. The inherit scheduling
attribute specifies whether a thread created using the specified attributes
object inherits the scheduling attributes of the creating thread, or uses
the scheduling attributes stored in the attributes object specified by the
pthread_create(3) attr argument.
The first thread in an application has a scheduling policy of SCHED_OTHER.
See the pthread_attr_setschedparam(3) and pthread_attr_setschedpolicy(3)
routines for more information on valid priority values and valid scheduling
policy values, respectively.
Inheriting scheduling attributes (instead of using the scheduling
attributes stored in the attributes object) is useful when a thread is
creating several helper threads--that is, threads that are intended to work
closely with the creating thread to cooperatively solve the same problem.
For example, inherited scheduling attributes ensure that helper threads
created in a sort routine execute with the same priority as the calling
If an error condition occurs, this routine returns an integer value
indicating the type of error. Possible return values are as follows:
0 Successful completion.
The value specified by the attr argument is not a valid thread
attributes object, or the inheritsched argument contains an invalid
An attempt was made to set the attribute to an unsupported value.
Functions: pthread_attr_init(3), pthread_attr_getinheritsched(3),
Manuals: Guide to DECthreads and Programmer's Guide
listing for P