From 232df72b82c8645b06a36d71496062d550603ba7 Mon Sep 17 00:00:00 2001
From: lisr <lsrlibj@cn.ibm.com>
Date: Sat, 20 Nov 2021 09:48:14 +0800
Subject: [PATCH] use pthread_getthrds_np for AIX

---
 include/spdlog/details/os-inl.h | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/include/spdlog/details/os-inl.h b/include/spdlog/details/os-inl.h
index b32eb85b..a7cd37f7 100644
--- a/include/spdlog/details/os-inl.h
+++ b/include/spdlog/details/os-inl.h
@@ -46,7 +46,7 @@
 #        include <sys/syscall.h> //Use gettid() syscall under linux to get thread id
 
 #    elif defined(_AIX)
-#        include <pthread.h> // for pthread_getthreadid_np
+#        include <pthread.h> // for pthread_getthrds_np
 
 #    elif defined(__DragonFly__) || defined(__FreeBSD__)
 #        include <pthread_np.h> // for pthread_getthreadid_np
@@ -337,7 +337,12 @@ SPDLOG_INLINE size_t _thread_id() SPDLOG_NOEXCEPT
 #    endif
     return static_cast<size_t>(::syscall(SYS_gettid));
 #elif defined(_AIX)
-    return static_cast<size_t>(::pthread_self());
+    struct __pthrdsinfo buf;
+    int reg_size = 0;
+    pthread_t pt = pthread_self();
+    int retval = pthread_getthrds_np(&pt, PTHRDSINFO_QUERY_TID, &buf, sizeof(buf), NULL, &reg_size);
+    int tid = (!retval) ? buf.__pi_tid : 0;
+    return static_cast<size_t>(tid);
 #elif defined(__DragonFly__) || defined(__FreeBSD__)
     return static_cast<size_t>(::pthread_getthreadid_np());
 #elif defined(__NetBSD__)