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authorIgor Sysoev <igor@sysoev.ru>2017-01-17 20:00:00 +0300
committerIgor Sysoev <igor@sysoev.ru>2017-01-17 20:00:00 +0300
commit16cbf3c076a0aca6d47adaf3f719493674cf2363 (patch)
treee6530480020f62a2bdbf249988ec3e2a751d3927 /src/nxt_thread_id.c
downloadunit-16cbf3c076a0aca6d47adaf3f719493674cf2363.tar.gz
unit-16cbf3c076a0aca6d47adaf3f719493674cf2363.tar.bz2
Initial version.
Diffstat (limited to 'src/nxt_thread_id.c')
-rw-r--r--src/nxt_thread_id.c170
1 files changed, 170 insertions, 0 deletions
diff --git a/src/nxt_thread_id.c b/src/nxt_thread_id.c
new file mode 100644
index 00000000..44f10d25
--- /dev/null
+++ b/src/nxt_thread_id.c
@@ -0,0 +1,170 @@
+
+/*
+ * Copyright (C) Igor Sysoev
+ * Copyright (C) NGINX, Inc.
+ */
+
+#include <nxt_main.h>
+
+
+#if (NXT_LINUX)
+
+/*
+ * Linux thread id is a pid of thread created by clone(2),
+ * glibc does not provide a wrapper for gettid().
+ */
+
+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.
+ */
+
+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 */
+
+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.
+ */
+
+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_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.
+ */
+
+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 */
+
+nxt_inline nxt_tid_t
+nxt_thread_get_tid(void)
+{
+ return pthread_self();
+}
+
+#else
+
+nxt_inline nxt_tid_t
+nxt_thread_get_tid(void)
+{
+ return pthread_self();
+}
+
+#endif
+
+
+nxt_tid_t
+nxt_thread_tid(nxt_thread_t *thr)
+{
+ if (thr == NULL) {
+ thr = nxt_thread();
+ }
+
+#if (NXT_HAVE_THREAD_STORAGE_CLASS)
+
+ if (nxt_slow_path(thr->tid == 0)) {
+ thr->tid = nxt_thread_get_tid();
+ }
+
+ return thr->tid;
+
+#else
+
+ if (nxt_fast_path(thr != NULL)) {
+
+ if (nxt_slow_path(thr->tid == 0)) {
+ thr->tid = nxt_thread_get_tid();
+ }
+
+ return thr->tid;
+ }
+
+ return nxt_thread_get_tid();
+
+#endif
+}