内容简介
#include <sched.h>int sched_rr_get_interval(pid_t pid, struct timespec *tp);
struct timespec {
time_t tv_sec; /* seconds */
long tv_nsec; /* nanoseconds */
};
|
描述
sched_rr_get_interval() writes into the timespec structure pointed to by tp the round robin time quantum for the process identified by pid. If pid is zero, the time quantum for the calling process is written into *tp. The identified process should be running under the SCHED_RR scheduling policy.The round robin time quantum value is not alterable under Linux 1.3.81.
POSIX systems on which sched_rr_get_interval() is available define_POSIX_PRIORITY_SCHEDULING in <unistd.h>.
返回值
On success, sched_rr_get_interval() returns 0. On error, -1 is returned, and errno is set appropriately.错误
| 标签 | 描述 |
|---|---|
| EFAULT | Problem with copying information to userspace. |
| EINVAL | Invalid pid. |
| ENOSYS | The system call is not yet implemented. |
| ESRCH | The process whose ID is pid could not be found. |
遵循于
POSIX.1-2001.BUGS
As of Linux 1.3.81 sched_rr_get_interval() returns with error ENOSYS, because SCHED_RR has not yet been fully implemented and tested properly.另请参阅
Programming for the real world - POSIX.4 by Bill O. Gallmeister, O’Reilly & Associates, Inc., ISBN 1-56592-074-0
