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Set the thread scheduling policy attribute
#include <pthread.h>
#include <sched.h>
int pthread_attr_setschedpolicy(
pthread_attr_t* attr,
int policy );
- attr
- A pointer to the pthread_attr_t structure that defines
the attributes to use when creating new threads.
For more information, see
pthread_attr_init().
- policy
- The new value for the scheduling policy:
- SCHED_FIFO — first-in first-out scheduling.
- SCHED_RR — round-robin scheduling.
- SCHED_OTHER — currently the same as
SCHED_RR.
- SCHED_NOCHANGE — don't change the policy.
- SCHED_SPORADIC — sporadic scheduling.
libc
Use the -l c option to
qcc
to link against this library.
This library is usually included automatically.
The pthread_attr_setschedpolicy() function sets the thread
scheduling policy attribute in the thread attribute object attr to
policy.
The policy attribute is used only if you've set the thread
inherit-scheduling attribute to PTHREAD_EXPLICIT_SCHED by
calling
pthread_attr_setinheritsched().
For descriptions of the scheduling policies, see
“Scheduling algorithms”
in the chapter on the Neutrino microkernel in the
System Architecture guide.
- EOK
- Success.
- EINVAL
- Invalid thread attribute object attr.
- ENOTSUP
- Invalid thread scheduling policy policy.
POSIX 1003.1 THR TPS
Safety: | |
Cancellation point |
No |
Interrupt handler |
No |
Signal handler |
Yes |
Thread |
Yes |
pthread_attr_getschedpolicy(),
pthread_attr_init(),
pthread_create().
“Thread scheduling”
in the QNX Neutrino Microkernel chapter of the
System Architecture guide
“Scheduling algorithms”
in the Programming Overview chapter of the
QNX Neutrino Programmer's Guide
Processes and Threads
chapter of Getting Started with QNX Neutrino
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