"SCHED_GETSCHEDULER"(P) manual page

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POSIX Threads for Windows – REFERENCE - Pthreads-w32

Reference Index

Table of Contents

Name

sched_getscheduler - get scheduling policy (REALTIME) +

Synopsis

#include <sched.h> +

int sched_getscheduler(pid_t pid); +

Description

The sched_getscheduler function shall return the scheduling +policy of the process specified by pid. If the value of pid +is negative, the behavior of the sched_getscheduler function +is unspecified. +

The values that can be returned by sched_getscheduler are +defined in the <sched.h> header. +

Pthreads-w32 only supports the SCHED_OTHER policy, +which is the only value that can be returned. However, checks on pid +and permissions are performed first so that the other useful side +effects of this routine are retained.

If a process specified by pid exists, and if the calling +process has permission, the scheduling policy shall be returned for +the process whose process ID is equal to pid. +

If pid is zero, the scheduling policy shall be returned for +the calling process. +

Return Value

Upon successful completion, the sched_getscheduler function +shall return the scheduling policy of the specified process. If +unsuccessful, the function shall return -1 and set errno to +indicate the error. +

Errors

The sched_getscheduler function shall fail if: +

EPERM +: + The requesting process does not have permission to determine the + scheduling policy of the specified process. +
+ ESRCH +: + No process can be found corresponding to that specified by pid. +

+The following sections are informative. +

Examples

None. +

Application Usage

None. +

Rationale

None. +

Future Directions

None. +

Copyright

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 +. +

Modified by Ross Johnson for use with Pthreads-w32.

Table of Contents

Name +
+
Synopsis +
+
Description +
+
Return + Value +
+
Errors +
+
Examples +
+
Application + Usage +
+
Rationale +
+
Future + Directions +
+
See + Also +
+
Copyright +
+

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