From 426a3f8468f650bbd75d4bf60019861bf7cf79e3 Mon Sep 17 00:00:00 2001
From: TQ Hirsch <thequux@upstandinghackers.com>
Date: Thu, 13 Mar 2014 17:48:39 +0000
Subject: [PATCH] Ported to NetBSD (1/2): Replaced Linux-specific timer call
CLOCK_THREAD_CPUTIME_ID is a linux-specific timer. On NetBSD, the best
way to get timer information appears to be getrusage, which happens to
be fairly cross-platform.
---
src/benchmark.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/src/benchmark.c b/src/benchmark.c
index a3f292e..632d7db 100644
--- a/src/benchmark.c
+++ b/src/benchmark.c
@@ -10,7 +10,13 @@
#include <mach/mach.h>
#endif
+#ifdef __NetBSD__
+#include <sys/resource.h>
+#endif
+
void h_benchmark_clock_gettime(struct timespec *ts) {
+ if (ts == NULL)
+ return;
#ifdef __MACH__ // OS X does not have clock_gettime, use clock_get_time
/*
* This returns real time, not CPU time. See http://stackoverflow.com/a/6725161
@@ -23,6 +29,18 @@ void h_benchmark_clock_gettime(struct timespec *ts) {
mach_port_deallocate(mach_task_self(), cclock);
ts->tv_sec = mts.tv_sec;
ts->tv_nsec = mts.tv_nsec;
+#elif defined(__NetBSD__)
+ // NetBSD doesn't have CLOCK_THREAD_CPUTIME_ID. We'll use getrusage instead
+ struct rusage rusage;
+ getrusage(RUSAGE_SELF, &rusage);
+ ts->tv_nsec = (rusage.ru_utime.tv_usec + rusage.ru_stime.tv_usec) * 1000;
+ // not going to overflow; can be at most 2e9-2
+ ts->tv_sec = rusage.ru_utime.tv_sec + rusage.ru_utime.tv_sec;
+ if (ts->tv_nsec >= 1000000000) {
+ ts->tv_nsec -= 1000000000; // subtract a second
+ ts->tv_sec += 1; // add it back.
+ }
+ assert (ts->tv_nsec <= 1000000000);
#else
clock_gettime(CLOCK_THREAD_CPUTIME_ID, ts);
#endif
--
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