NAME

getthrid — get thread identifier

SYNOPSIS

#include <unistd.h>

pid_t
getthrid(void);

DESCRIPTION

getthrid() returns the thread ID of the calling thread. This is used in the implementation of the thread library (-lpthread) and can appear in the output of system utilities such as ps(1) and kdump(1).

Thread IDs are not a stable interface and should not be used directly by applications except for correlation with system utility output. Applications should use the pthread_t values from pthread_self(3) and pthread_create(3) to identify threads within the process itself.

RETURN VALUES

This function is always successful, and no return value is reserved to indicate an error.

SEE ALSO

getpid(2), __tfork(3), pthread_create(3), pthread_self(3)

STANDARDS

The getthrid() syscall is specific to OpenBSD and should not be used in portable applications.

HISTORY

The getthrid() syscall appeared in OpenBSD 3.9.