Add support for DragonFly BSD (#1058)

Without this commit, compilation fails on DragonFly with the following message: ``` /home/mneumann/Dev/benchmark.old/src/sysinfo.cc:446:2: error: #warning "HOST_NAME_MAX not defined. using 64" [-Werror=cpp] ^~~~~~~ ``` Also note that the sysctl is actually `hw.tsc_frequency` on DragonFly: ``` $ sysctl hw.tsc_frequency hw.tsc_frequency: 3498984022 ``` Tested on: ``` $ uname -a DragonFly box.localnet 5.9-DEVELOPMENT DragonFly v5.9.0.742.g4b29dd-DEVELOPMENT #5: Tue Aug 18 00:21:31 CEST 2020 ```

Add support for DragonFly BSD (#1058)
af72911f · Michael Neumann · GitHub · ffe1342e · af72911f · af72911f
Unverified Commit af72911f authored Oct 12, 2020 by Michael Neumann Committed by GitHub Oct 12, 2020
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Showing with 12 additions and 5 deletions

internal_macros.h src/internal_macros.h +2 -0

sysinfo.cc src/sysinfo.cc +8 -4

timers.cc src/timers.cc +2 -1

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--- a/src/internal_macros.h
+++ b/src/internal_macros.h
@@ -58,6 +58,8 @@
  #define BENCHMARK_OS_NETBSD 1
 #elif defined(__OpenBSD__)
  #define BENCHMARK_OS_OPENBSD 1
+#elif defined(__DragonFly__)
+  #define BENCHMARK_OS_DRAGONFLY 1
 #elif defined(__linux__)
  #define BENCHMARK_OS_LINUX 1
 #elif defined(__native_client__)

--- a/src/sysinfo.cc
+++ b/src/sysinfo.cc
@@ -29,7 +29,8 @@
 #include <sys/types.h>  // this header must be included before 'sys/sysctl.h' to avoid compilation error on FreeBSD
 #include <unistd.h>
 #if defined BENCHMARK_OS_FREEBSD || defined BENCHMARK_OS_MACOSX || \
-    defined BENCHMARK_OS_NETBSD || defined BENCHMARK_OS_OPENBSD
+    defined BENCHMARK_OS_NETBSD || defined BENCHMARK_OS_OPENBSD || \
+    defined BENCHMARK_OS_DRAGONFLY
 #define BENCHMARK_HAS_SYSCTL
 #include <sys/sysctl.h>
 #endif
@@ -607,6 +608,8 @@ double GetCPUCyclesPerSecond() {
      "machdep.tsc_freq";
 #elif defined BENCHMARK_OS_OPENBSD
      "hw.cpuspeed";
+#elif defined BENCHMARK_OS_DRAGONFLY
+      "hw.tsc_frequency";
 #else
      "hw.cpufrequency";
 #endif
@@ -671,9 +674,10 @@ double GetCPUCyclesPerSecond() {
 }

 std::vector<double> GetLoadAvg() {
-#if (defined BENCHMARK_OS_FREEBSD || defined(BENCHMARK_OS_LINUX) || \
-    defined BENCHMARK_OS_MACOSX || defined BENCHMARK_OS_NETBSD ||  \
-    defined BENCHMARK_OS_OPENBSD) && !defined(__ANDROID__)
+#if (defined BENCHMARK_OS_FREEBSD || defined(BENCHMARK_OS_LINUX) ||     \
+     defined BENCHMARK_OS_MACOSX || defined BENCHMARK_OS_NETBSD ||      \
+     defined BENCHMARK_OS_OPENBSD || defined BENCHMARK_OS_DRAGONFLY) && \
+    !defined(__ANDROID__)
  constexpr int kMaxSamples = 3;
  std::vector<double> res(kMaxSamples, 0.0);
  const int nelem = getloadavg(res.data(), kMaxSamples);

--- a/src/timers.cc
+++ b/src/timers.cc
@@ -28,7 +28,8 @@
 #include <sys/time.h>
 #include <sys/types.h>  // this header must be included before 'sys/sysctl.h' to avoid compilation error on FreeBSD
 #include <unistd.h>
-#if defined BENCHMARK_OS_FREEBSD || defined BENCHMARK_OS_MACOSX
+#if defined BENCHMARK_OS_FREEBSD || defined BENCHMARK_OS_DRAGONFLY || \
+    defined BENCHMARK_OS_MACOSX
 #include <sys/sysctl.h>
 #endif
 #if defined(BENCHMARK_OS_MACOSX)