NAME

cpu_get_current − Return the caller’s current CPU ID (libc library)

SYNOPSIS

#include <cpuset.h>
cpuid_t cpu_get_current(
        void );

PARAMETERS

The cpu_get_current() function has no parameters. 

DESCRIPTION

The cpu_get_current() function fetches the ID of the CPU on which the caller is executing. 

NOTES

This function is similar to the following call:

getsysinfo(GSI_CPU_CURRENT, &cpuid, ...);

However, cpu_get_current() returns the CPU identifier directly (as type cpuid_t), whereas the getsysinfo() call stores the identifier into a buffer (as type long) whose address is passed to the function. 

RESTRICTIONS

As is true for many system information queries, the data returned by cpu_get_current() may be stale by the time it is returned to or used by the caller. In other words, a context switch to a different CPU can occur after the “current CPU” has been fetched by the application. 

RETURN VALUES

The cpu_get_current() function returns the CPU ID of the processor where the caller is executing. This function always completes successfully. 

ERRORS

None. 

SEE ALSO

Functions: getsysinfo(2), numa_intro(3)

Files: numa_types(4)