1
2 /*
3 * Copyright (C) Igor Sysoev
4 * Copyright (C) NGINX, Inc.
5 */
6
7 #ifndef _NXT_UNIX_THREAD_ID_H_INCLUDED_
8 #define _NXT_UNIX_THREAD_ID_H_INCLUDED_
9
10
11 #if (NXT_LINUX)
12
13 /*
14 * Linux thread id is a pid of thread created by clone(2),
15 * glibc does not provide a wrapper for gettid().
16 */
17
18 typedef pid_t nxt_tid_t;
19
20 nxt_inline nxt_tid_t
nxt_thread_get_tid(void)21 nxt_thread_get_tid(void)
22 {
23 return syscall(SYS_gettid);
24 }
25
26 #elif (NXT_FREEBSD)
27
28 /*
29 * FreeBSD 9.0 provides pthread_getthreadid_np(), here is its
30 * emulation. Kernel thread id is the first field of struct pthread.
31 * Although kernel exports a thread id as long type, lwpid_t is 32bit.
32 * Thread id is a number above 100,000.
33 */
34
35 typedef uint32_t nxt_tid_t;
36
37 nxt_inline nxt_tid_t
nxt_thread_get_tid(void)38 nxt_thread_get_tid(void)
39 {
40 return (uint32_t) (*(long *) pthread_self());
41 }
42
43 #elif (NXT_SOLARIS)
44
45 /* Solaris pthread_t are numbers starting with 1. */
46
47 typedef pthread_t nxt_tid_t;
48
49 nxt_inline nxt_tid_t
nxt_thread_get_tid(void)50 nxt_thread_get_tid(void)
51 {
52 return pthread_self();
53 }
54
55 #elif (NXT_MACOSX)
56
57 /*
58 * MacOSX thread has two thread ids:
59 *
60 * 1) MacOSX 10.6 (Snow Leoprad) has pthread_threadid_np() returning
61 * an uint64_t value, which is obtained using the __thread_selfid()
62 * syscall. It is a number above 300,000.
63 */
64
65 typedef uint64_t nxt_tid_t;
66
67 nxt_inline nxt_tid_t
nxt_thread_get_tid(void)68 nxt_thread_get_tid(void)
69 {
70 uint64_t tid;
71
72 (void) pthread_threadid_np(NULL, &tid);
73 return tid;
74 }
75
76 /*
77 * 2) Kernel thread mach_port_t returned by pthread_mach_thread_np().
78 * It is a number in range 100-100,000.
79 *
80 * return pthread_mach_thread_np(pthread_self());
81 */
82
83 #elif (NXT_OPENBSD)
84
85 typedef pid_t nxt_tid_t;
86
87 /* OpenBSD 3.9 getthrid(). */
88
89 nxt_inline nxt_tid_t
nxt_thread_get_tid(void)90 nxt_thread_get_tid(void)
91 {
92 return getthrid();
93 }
94
95 #elif (NXT_AIX)
96
97 /*
98 * pthread_self() in main thread returns 1.
99 * pthread_self() in other threads returns 258, 515, etc.
100 *
101 * pthread_getthrds_np(PTHRDSINFO_QUERY_TID) returns kernel tid
102 * shown in "ps -ef -m -o THREAD" output.
103 */
104
105 typedef tid_t nxt_tid_t;
106
107 nxt_inline nxt_tid_t
nxt_thread_get_tid(void)108 nxt_thread_get_tid(void)
109 {
110 int err, size;
111 pthread_t pt;
112 struct __pthrdsinfo ti;
113
114 size = 0;
115 pt = pthread_self();
116
117 err = pthread_getthrds_np(&pt, PTHRDSINFO_QUERY_TID, &ti,
118 sizeof(struct __pthrdsinfo), NULL, size);
119
120 if (nxt_fast_path(err == 0)) {
121 return ti.__pi_tid;
122 }
123
124 nxt_main_log_alert("pthread_getthrds_np(PTHRDSINFO_QUERY_TID) failed %E",
125 err);
126 return 0;
127 }
128
129 /*
130 * AIX pthread_getunique_np() returns thread unique number starting with 1.
131 * OS/400 and i5/OS have pthread_getthreadid_np(), but AIX lacks their
132 * counterpart.
133 *
134 *
135 * int tid;
136 * pthread_t pt;
137 *
138 * pt = pthread_self();
139 * pthread_getunique_np(&pt, &tid);
140 * return tid;
141 */
142
143 #elif (NXT_HPUX)
144
145 /* HP-UX pthread_t are numbers starting with 1. */
146
147 typedef pthread_t nxt_tid_t;
148
149 nxt_inline nxt_tid_t
nxt_thread_get_tid(void)150 nxt_thread_get_tid(void)
151 {
152 return pthread_self();
153 }
154
155 #else
156
157 typedef pthread_t nxt_tid_t;
158
159 nxt_inline nxt_tid_t
nxt_thread_get_tid(void)160 nxt_thread_get_tid(void)
161 {
162 return pthread_self();
163 }
164
165 #endif
166
167
168 NXT_EXPORT nxt_tid_t nxt_thread_tid(nxt_thread_t *thr);
169
170
171 /*
172 * On Linux pthread_t is unsigned long integer.
173 * On FreeBSD, MacOSX, NetBSD, and OpenBSD pthread_t is pointer to a struct.
174 * On Solaris and AIX pthread_t is unsigned integer.
175 * On HP-UX pthread_t is int.
176 * On Cygwin pthread_t is pointer to void.
177 * On z/OS pthread_t is "struct { char __[0x08]; }".
178 */
179 typedef pthread_t nxt_thread_handle_t;
180
181
182 #define \
183 nxt_thread_handle_clear(th) \
184 th = (pthread_t) 0
185
186 #define \
187 nxt_thread_handle_equal(th0, th1) \
188 pthread_equal(th0, th1)
189
190
191 #endif /* _NXT_UNIX_THREAD_ID_H_INCLUDED_ */
192