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gettid(2) -- Linux man page
NAME
gettid - get thread identification
SYNOPSIS
#include <sys/types.h>
#include <linux/unistd.h>
_syscall0(pid_t,gettid)
pid_t gettid(void);
DESCRIPTION
gettid returns the thread ID of the current process. This is equal
to the process ID (as returned by
getpid(2)),
unless the process is part of a thread group (created by specifying
the CLONE_THREAD flag to the
clone(2)
system call). All processes in the same thread group
have the same PID, but each one has a unique TID.
RETURN VALUE
On success, returns the thread ID of the current process.
ERRORS
This call is always successful.
CONFORMING TO
gettid is Linux specific and should not be used in programs that
are intended to be portable.
SEE ALSO
getpid(2),
clone(2),
fork(2)
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