| 1 | // SPDX-License-Identifier: GPL-3.0-or-later |
| 2 | |
| 3 | #include "../libnetdata.h" |
| 4 | |
| 5 | pid_t os_gettid(void) { |
| 6 | #if defined(HAVE_GETTID) |
| 7 | return gettid(); |
| 8 | #elif defined(HAVE_PTHREAD_GETTHREADID_NP) |
| 9 | return (pid_t)pthread_getthreadid_np(); |
| 10 | #elif defined(HAVE_PTHREAD_THREADID_NP) |
| 11 | uint64_t curthreadid; |
| 12 | pthread_threadid_np(NULL, &curthreadid); |
| 13 | return curthreadid; |
| 14 | #elif defined(OS_WINDOWS) |
| 15 | return (pid_t)GetCurrentThreadId(); |
| 16 | #elif defined(OS_LINUX) |
| 17 | return (pid_t)syscall(SYS_gettid); |
| 18 | #else |
| 19 | return (pid_t)pthread_self(); |
| 20 | #endif |
| 21 | } |
| 22 | |
| 23 | static __thread pid_t gettid_cached_tid = 0; |
| 24 | ALWAYS_INLINE pid_t gettid_cached(void) { |
| 25 | if(unlikely(gettid_cached_tid == 0)) |
| 26 | gettid_cached_tid = os_gettid(); |
| 27 | |
| 28 | return gettid_cached_tid; |
| 29 | } |
| 30 | |
| 31 | pid_t gettid_uncached(void) { |
| 32 | gettid_cached_tid = 0; |
| 33 | return gettid_cached(); |
| 34 | } |