/*
* Copyright (C) Igor Sysoev
* Copyright (C) NGINX, Inc.
*/
#ifndef _NXT_UNIX_THREAD_ID_H_INCLUDED_
#define _NXT_UNIX_THREAD_ID_H_INCLUDED_
#if (NXT_LINUX)
/*
* Linux thread id is a pid of thread created by clone(2),
* glibc does not provide a wrapper for gettid().
*/
typedef pid_t nxt_tid_t;
nxt_inline nxt_tid_t
nxt_thread_get_tid(void)
{
return syscall(SYS_gettid);
}
#elif (NXT_FREEBSD)
/*
* FreeBSD 9.0 provides pthread_getthreadid_np(), here is its
* emulation. Kernel thread id is the first field of struct pthread.
* Although kernel exports a thread id as long type, lwpid_t is 32bit.
* Thread id is a number above 100,000.
*/
typedef uint32_t nxt_tid_t;
nxt_inline nxt_tid_t
nxt_thread_get_tid(void)
{
return (uint32_t) (*(long *) pthread_self());
}
#elif (NXT_SOLARIS)
/* Solaris pthread_t are numbers starting with 1. */
typedef pthread_t nxt_tid_t;
nxt_inline nxt_tid_t
nxt_thread_get_tid(void)
{
return pthread_self();
}
#elif (NXT_MACOSX)
/*
* MacOSX thread has two thread ids:
*
* 1) MacOSX 10.6 (Snow Leoprad) has pthread_threadid_np() returning
* an uint64_t value, which is obtained using the __thread_selfid()
* syscall. It is a number above 300,000.
*/
typedef uint64_t nxt_tid_t;
nxt_inline nxt_tid_t
nxt_thread_get_tid(void)
{
uint64_t tid;
(void) pthread_threadid_np(NULL, &tid);
return tid;
}
/*
* 2) Kernel thread mach_port_t returned by pthread_mach_thread_np().
* It is a number in range 100-100,000.
*
* return pthread_mach_thread_np(pthread_self());
*/
#elif (NXT_OPENBSD)
typedef pid_t nxt_tid_t;
/* OpenBSD 3.9 getthrid(). */
nxt_inline nxt_tid_t
nxt_thread_get_tid(void)
{
return getthrid();
}
#elif (NXT_AIX)
/*
* pthread_self() in main thread returns 1.
* pthread_self() in other threads returns 258, 515, etc.
*
* pthread_getthrds_np(PTHRDSINFO_QUERY_TID) returns kernel tid
* shown in "ps -ef -m -o THREAD" output.
*/
typedef tid_t nxt_tid_t;
nxt_inline nxt_tid_t
nxt_thread_get_tid(void)
{
int err, size;
pthread_t pt;
struct __pthrdsinfo ti;
size = 0;
pt = pthread_self();
err = pthread_getthrds_np(&pt, PTHRDSINFO_QUERY_TID, &ti,
sizeof(struct __pthrdsinfo), NULL, size);
if (nxt_fast_path(err == 0)) {
return ti.__pi_tid;
}
nxt_main_log_alert("pthread_getthrds_np(PTHRDSINFO_QUERY_TID) failed %E",
err);
return 0;
}
/*
* AIX pthread_getunique_np() returns thread unique number starting with 1.
* OS/400 and i5/OS have pthread_getthreadid_np(), but AIX lacks their
* counterpart.
*
*
* int tid;
* pthread_t pt;
*
* pt = pthread_self();
* pthread_getunique_np(&pt, &tid);
* return tid;
*/
#elif (NXT_HPUX)
/* HP-UX pthread_t are numbers starting with 1. */
typedef pthread_t nxt_tid_t;
nxt_inline nxt_tid_t
nxt_thread_get_tid(void)
{
return pthread_self();
}
#else
typedef pthread_t nxt_tid_t;
nxt_inline nxt_tid_t
nxt_thread_get_tid(void)
{
return pthread_self();
}
#endif
NXT_EXPORT nxt_tid_t nxt_thread_tid(nxt_thread_t *thr);
/*
* On Linux pthread_t is unsigned long integer.
* On FreeBSD, MacOSX, NetBSD, and OpenBSD pthread_t is pointer to a struct.
* On Solaris and AIX pthread_t is unsigned integer.
* On HP-UX pthread_t is int.
* On Cygwin pthread_t is pointer to void.
* On z/OS pthread_t is "struct { char __[0x08]; }".
*/
typedef pthread_t nxt_thread_handle_t;
#define nxt_thread_handle_clear(th) \
th = (pthread_t) 0
#define nxt_thread_handle_equal(th0, th1) \
pthread_equal(th0, th1)
#endif /* _NXT_UNIX_THREAD_ID_H_INCLUDED_ */
