From 01f20286ed24d005f529a7bbd94f2e8e4ebcbc9f Mon Sep 17 00:00:00 2001
From: Rich Alloway <richard.alloway@roguewave.com>
Date: Mon, 23 Apr 2018 11:11:18 -0400
Subject: [PATCH] Check in code to handle missing clock_gettime() on most
 versions of Mac OS X

---
 include/ZmqLogger.h |  6 ++++++
 src/ZmqLogger.cpp   | 10 ++++++++++
 2 files changed, 16 insertions(+)

diff --git a/include/ZmqLogger.h b/include/ZmqLogger.h
index c134f2cf..100718b2 100644
--- a/include/ZmqLogger.h
+++ b/include/ZmqLogger.h
@@ -41,6 +41,12 @@
 #include <zmq.hpp>
 #include <unistd.h>
 
+// OS X does not have clock_gettime, use clock_get_time (https://gist.github.com/jbenet/1087739)
+#ifdef __MACH__
+#include <mach/clock.h>
+#include <mach/mach.h>
+#endif
+
 
 using namespace std;
 
diff --git a/src/ZmqLogger.cpp b/src/ZmqLogger.cpp
index 96bccbbf..0c466246 100644
--- a/src/ZmqLogger.cpp
+++ b/src/ZmqLogger.cpp
@@ -179,7 +179,17 @@ void ZmqLogger::AppendDebugMethod(string method_name, string arg1_name, float ar
 
 		// Prepend current time (hires) to message
 		struct timespec ts;
+#ifdef __MACH__ // OS X does not have clock_gettime, use clock_get_time (https://gist.github.com/jbenet/1087739)
+		clock_serv_t cclock;
+		mach_timespec_t mts;
+		host_get_clock_service(mach_host_self(), CALENDAR_CLOCK, &cclock);
+		clock_get_time(cclock, &mts);
+		mach_port_deallocate(mach_task_self(), cclock);
+		ts->tv_sec = mts.tv_sec;
+		ts->tv_nsec = mts.tv_nsec;
+#else
 		clock_gettime(CLOCK_REALTIME, &ts);
+#endif
 		char timebuf[80];
 		strftime(timebuf, sizeof timebuf, "%F %T", localtime(&ts.tv_sec));
 		message << timebuf << "." << std::setiosflags(std::ios::right) << std::setw(9) << std::setfill('0') << ts.tv_nsec << "  ";