PTHREAD_ATTR_GETINHERITSCHED(3) Library Functions Manual PTHREAD_ATTR_GETINHERITSCHED(3)

pthread_attr_getinheritsched pthread_attr_setinheritsched — get and set the inheritsched attribute (REALTIME THREADS)


#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);

The pthread_attr_getinheritsched (), and pthread_attr_setinheritsched () functions, respectively, shall get and set the inheritsched attribute in the argument.

When the attributes objects are used by pthread_create(3), the inheritsched attribute determines how the other scheduling attributes of the created thread shall be set.


Specifies that the thread scheduling attributes shall be inherited from the creating thread, and the scheduling attributes in this attr argument shall be ignored.

Specifies that the thread scheduling attributes shall be set to the corresponding values from this attributes object.

The symbols PTHREAD_INHERIT_SCHED and PTHREAD_EXPLICIT_SCHED are defined in the <pthread.h> header.

The following thread scheduling attributes defined by IEEE Std 1003.1-2001 (“POSIX.1”) are affected by the inheritsched attribute: scheduling policy ( ), scheduling parameters ( ), and scheduling contention scope ( ).

If successful, the pthread_attr_getinheritsched () and pthread_attr_setinheritsched () functions shall return zero; otherwise, an error number shall be returned to indicate the error.

The pthread_attr_setinheritsched () function may fail if:

The value of inheritsched is not valid.
An attempt was made to set the attribute to an unsupported value.

These functions shall not return an error code of [EINTR].

None.

After these attributes have been set, a thread can be created with the specified attributes using pthread_create(3). Using these routines does not affect the current running thread.

None.

None.

pthread_attr_destroy(3) , pthread_attr_getscope(3) , pthread_attr_getschedpolicy(3) , pthread_attr_getschedparam(3) , pthread_create(3) , the Base Definitions volume of IEEE Std 1003.1-2001 (“POSIX.1”), <pthread.h>, <sched.h>

First released in Issue 5. Included for alignment with the POSIX Threads Extension.

Marked as part of the Realtime Threads Feature Group.

The pthread_attr_getinheritsched () and pthread_attr_setinheritsched () functions are marked as part of the Threads and Thread Execution Scheduling options.

The [ENOSYS] error condition has been removed as stubs need not be provided if an implementation does not support the Thread Execution Scheduling option.

The keyword is added to the pthread_attr_getinheritsched () prototype for alignment with the ISO/IEC 9899:1999 (“ISO C99”) standard.

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December 6, 2001 posix.fail