Professional Multicore Programming: Design and Implementation for C++ Developers

Name

NAME

posix_spawnattr_getschedpolicy, posix_spawnattr_setschedpolicy — get and set the spawn-schedpolicy attribute of a spawn attributes object (ADVANCED REALTIME)

SYNOPSIS

SPN PS #include <spawn.h>
       #include <sched.h>

       int posix_spawnattr_getschedpolicy (const posix_spawnattr_t *
           restrict attr, int *restrict schedpolicy) ;
       int posix_spawnattr_setschedpolicy (posix_spawnattr_t *attr,
           int schedpolicy) ;

DESCRIPTION

The posix_spawnattr_getschedpolicy() function shall obtain the value of the spawn-schedpolicy attribute from the attributes object referenced by attr.

The posix_spawnattr_setschedpolicy() function shall set the spawn_schedpolicy attribute in an initialized attributes object referenced by attr

The spawn-schedpolicy attribute represents the scheduling policy to be assigned to the new process image in a spawn operation (if POSIX_SPAWN_SETCHEDULER is set in the spawnflags attribute). The default value of this attribute is unspecified.

RETURN VALUE

Upon successful completion, posix_spawnattr_getschedpolicy() shall return zero and store the value of the spawn-schedpolicy attribute of attr into the object referenced by the schedpolicy parameter; otherwise, an error number shall be returned to indicate the error.

Upon successful completion, posix_spawnattr_setschedpolicy() shall return zero; otherwise, an error number shall be returned to indicate the error.

ERRORS

These functions may fail if:

[EINVAL]

The value specified by attr is invalid.

The posix_spawnattr_setschedpolicy() function may ...