master e4028d1: Add thread-naming support for OpenBSD

[Mattias Engdegård]

branch: master
commit e4028d15153a29966425d93be6374fae770d14a8
Author: Timo Myyrä <timo.myyra@bittivirhe.fi>
Commit: Mattias Engdegård <mattiase@acm.org>

    Add thread-naming support for OpenBSD
    
    OpenBSD has pthread_set_name_np; FreeBSD appears to have both
    this call and pthread_setname_np (the latter call is used in preference).
    
    * configure.ac: Detect pthread_set_name_np.
    * sys/systhread.c:
    Include <pthread_np.h> and call pthread_set_name_np if available.
---
 configure.ac    | 3 ++-
 src/systhread.c | 8 ++++++++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/configure.ac b/configure.ac
index b1b8c84..9edd227 100644
--- a/configure.ac
+++ b/configure.ac
@@ -4187,7 +4187,8 @@ pthread_sigmask strsignal setitimer timer_getoverrun \
 sendto recvfrom getsockname getifaddrs freeifaddrs \
 gai_strerror sync \
 getpwent endpwent getgrent endgrent \
-cfmakeraw cfsetspeed __executable_start log2 pthread_setname_np)
+cfmakeraw cfsetspeed __executable_start log2 pthread_setname_np \
+pthread_set_name_np)
 LIBS=$OLD_LIBS
 
 if test "$ac_cv_func_pthread_setname_np" = "yes"; then
diff --git a/src/systhread.c b/src/systhread.c
index 0d600d6..ebd7552 100644
--- a/src/systhread.c
+++ b/src/systhread.c
@@ -26,6 +26,10 @@ along with GNU Emacs.  If not, see 
<https://www.gnu.org/licenses/>.  */
 #include "nsterm.h"
 #endif
 
+#ifdef HAVE_PTHREAD_SET_NAME_NP
+#include <pthread_np.h>
+#endif
+
 #ifndef THREADS_ENABLED
 
 void
@@ -221,6 +225,10 @@ sys_thread_set_name (const char *name)
 # else
   pthread_setname_np (pthread_self (), p_name);
 # endif
+#elif HAVE_PTHREAD_SET_NAME_NP
+  /* The name will automatically be truncated if it exceeds a
+     system-specific length.  */
+  pthread_set_name_np (pthread_self (), name);
 #endif
 }