From 17fa2dba4296ab0bfe110f93fb3fa911fdae83cb Mon Sep 17 00:00:00 2001
From: Martin Pulec <martin.pulec@cesnet.cz>
Date: Tue, 22 Mar 2022 09:24:25 +0100
Subject: [PATCH] timespec_get compat

macOS 10.11 which we still use for backward-compatible mac builds
doesn't have timespec_get function.
---
 configure.ac | 1 +
 src/tv.h     | 6 ++++++
 2 files changed, 7 insertions(+)

diff --git a/configure.ac b/configure.ac
index c3be80ee4..19753f5a7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -322,6 +322,7 @@ fi
 
 AC_CHECK_FUNCS(usleep)
 AC_CHECK_FUNCS(strtok_r)
+AC_CHECK_FUNCS(timespec_get)
 
 AC_CHECK_FUNCS(drand48)
 if test $ac_cv_func_drand48 = no
diff --git a/src/tv.h b/src/tv.h
index cc1f50053..33140bcd2 100644
--- a/src/tv.h
+++ b/src/tv.h
@@ -72,9 +72,15 @@ typedef long long time_ns_t;
 #define NS_IN_SEC 1000000000LL
 #define NS_IN_US (NS_IN_SEC/US_IN_SEC)
 static inline time_ns_t get_time_in_ns() {
+#ifdef HAVE_TIMESPEC_GET
         struct timespec ts = { 0, 0 };
         timespec_get(&ts, TIME_UTC);
         return ts.tv_sec * NS_IN_SEC + ts.tv_nsec;
+#else
+        struct timeval tv = { 0, 0 };
+        gettimeofday(&tv, NULL);
+        return tv.tv_sec * NS_IN_SEC + tv.tv_usec * NS_IN_US;
+#endif
 }
 
 #ifdef __cplusplus