Manpages - sched_getcpu.3
Table of Contents
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NAME
sched_getcpu - determine CPU on which the calling thread is running
SYNOPSIS
#include <sched.h> int sched_getcpu(void);
Feature Test Macro Requirements for glibc (see *feature_test_macros*(7)):
*sched_getcpu*():
Since glibc 2.14: _GNU_SOURCE Before glibc 2.14: _BSD_SOURCE || _SVID_SOURCE /* _GNU_SOURCE also suffices */
DESCRIPTION
*sched_getcpu*() returns the number of the CPU on which the calling thread is currently executing.
RETURN VALUE
On success, *sched_getcpu*() returns a nonnegative CPU number. On error, -1 is returned and errno is set to indicate the error.
ERRORS
- ENOSYS
- This kernel does not implement *getcpu*(2).
VERSIONS
This function is available since glibc 2.6.
ATTRIBUTES
For an explanation of the terms used in this section, see *attributes*(7).
Interface | Attribute | Value |
*sched_getcpu*() | Thread safety | MT-Safe |
CONFORMING TO
*sched_getcpu*() is glibc-specific.
NOTES
The call
cpu = sched_getcpu();
is equivalent to the following *getcpu*(2) call:
int c, s; s = getcpu(&c, NULL, NULL); cpu = (s == -1) ? s : c;
SEE ALSO
*getcpu*(2), *sched*(7)
COLOPHON
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