sched_setparam()

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Прототип:

#include <sched.h>
int sched_setparam( pid_t pid,
const struct sched_param *param );

Аргументы:

pid
The ID of the process whose priority you want to set, or 0 to set it for the current process.
param
A pointer to a struct sched_param whose sched_priority member holds the priority that you want to assign to the process.

Библиотека:

libc

Описание:

The sched_setparam() function changes the priority of process pid to that of the sched_priority member in the struct sched_param pointed to by param. If pid is zero, the priority of the calling process is changed.

The sched_priority member in param must lie between the minimum and maximum values returned by sched_get_priority_max() and sched_get_priority_min().

By default, the process priority and scheduling policy are inherited from or explicitly set by the parent process. Once running, the child process may change its priority by using this function.

Возвращаемое значение:

0
Успешное завершение.
-1
Возникла ошибка. Код ошибки записан в errno.

Коды ошибок:

EFAULT
A fault occurred trying to access the buffers provided.
EINVAL
The priority isn't a valid priority.
EPERM
The calling process doesn't have sufficient privilege to set the priority.
ESRCH
The process pid doesn't exist.

Классификация:

POSIX 1003.1 PS

Точка остановки потока
Нет
Обработчик прерываний
Нет
Обработчик сигналов
Да
В потоке
Да

Предостережения:

In a multithreaded program, sched_setparam() sets the scheduling parameters for thread 1 in the process pid, or for the calling thread if pid is 0.

Тематические ссылки:

struct sched_param, errno, getprio(), pthread_getschedparam(), pthread_setschedparam(), pthread_setschedprio(), sched_getparam(), sched_get_priority_max(), sched_get_priority_min(), sched_getscheduler(), sched_setscheduler(), sched_yield(), setprio()




Предыдущий раздел: Описание API системной библиотеки