Originální popis anglicky:
pthread_attr_getschedparam, pthread_attr_setschedparam - get and set the
schedparam attribute
Návod, kniha: POSIX Programmer's Manual
#include <pthread.h>
int pthread_attr_getschedparam(const pthread_attr_t *restrict
attr ,
struct sched_param *restrict
param);
int pthread_attr_setschedparam(pthread_attr_t *restrict
attr ,
const struct sched_param
*restrict
param);
The
pthread_attr_getschedparam(), and
pthread_attr_setschedparam()
functions, respectively, shall get and set the scheduling parameter attributes
in the
attr argument. The contents of the
param structure are
defined in the
<sched.h> header. For the SCHED_FIFO and SCHED_RR
policies, the only required member of
param is
sched_priority.
For the SCHED_SPORADIC policy, the required members of the
param
structure are
sched_priority,
sched_ss_low_priority,
sched_ss_repl_period,
sched_ss_init_budget, and
sched_ss_max_repl. The specified
sched_ss_repl_period must be
greater than or equal to the specified
sched_ss_init_budget for the
function to succeed; if it is not, then the function shall fail. The value of
sched_ss_max_repl shall be within the inclusive range [1,
{SS_REPL_MAX}] for the function to succeed; if not, the function shall fail.
If successful, the
pthread_attr_getschedparam() and
pthread_attr_setschedparam() functions shall return zero; otherwise, an
error number shall be returned to indicate the error.
The
pthread_attr_setschedparam() function may fail if:
- EINVAL
- The value of param is not valid.
- ENOTSUP
- An attempt was made to set the attribute to an unsupported
value.
These functions shall not return an error code of [EINTR].
The following sections are informative.
None.
After these attributes have been set, a thread can be created with the specified
attributes using
pthread_create(). Using these routines does not affect
the current running thread.
None.
None.
pthread_attr_destroy() ,
pthread_attr_getscope() ,
pthread_attr_getinheritsched() ,
pthread_attr_getschedpolicy() ,
pthread_create() , the Base Definitions volume of
IEEE Std 1003.1-2001,
<pthread.h>,
<sched.h>
Portions of this text are reprinted and reproduced in electronic form from IEEE
Std 1003.1, 2003 Edition, Standard for Information Technology -- Portable
Operating System Interface (POSIX), The Open Group Base Specifications Issue
6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics
Engineers, Inc and The Open Group. In the event of any discrepancy between
this version and the original IEEE and The Open Group Standard, the original
IEEE and The Open Group Standard is the referee document. The original
Standard can be obtained online at http://www.opengroup.org/unix/online.html
.
