получить идентификацию потока (get thread identification)
Имя (Name)
gettid - get thread identification
Синопсис (Synopsis)
#define _GNU_SOURCE
#include <unistd.h>
pid_t gettid(void);
Описание (Description)
gettid() returns the caller's thread ID (TID). In a single-
threaded process, the thread ID is equal to the process ID (PID,
as returned by getpid(2)). In a multithreaded process, all
threads have the same PID, but each one has a unique TID. For
further details, see the discussion of CLONE_THREAD in clone(2).
Возвращаемое значение (Return value)
On success, returns the thread ID of the calling thread.
Ошибки (Error)
This call is always successful.
Версии (Versions)
The gettid() system call first appeared on Linux in kernel
2.4.11. Library support was added in glibc 2.30. (Earlier glibc
versions did not provide a wrapper for this system call,
necessitating the use of syscall(2).)
Стандарты (Conforming to)
gettid() is Linux-specific and should not be used in programs
that are intended to be portable.
Примечание (Note)
The thread ID returned by this call is not the same thing as a
POSIX thread ID (i.e., the opaque value returned by
pthread_self(3)).
In a new thread group created by a clone(2) call that does not
specify the CLONE_THREAD flag (or, equivalently, a new process
created by fork(2)), the new process is a thread group leader,
and its thread group ID (the value returned by getpid(2)) is the
same as its thread ID (the value returned by gettid()).
Смотри также (See also)
capget(2), clone(2), fcntl(2), fork(2), get_robust_list(2),
getpid(2), ioprio_set(2), perf_event_open(2),
sched_setaffinity(2), sched_setparam(2), sched_setscheduler(2),
tgkill(2), timer_create(2)
