Mesa (master): gallium/hud: add CPU usage support for FreeBSD

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Module: Mesa
Branch: master
Commit: c5a6e72e15b67b37e5b2e35721261ec3da60c045
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=c5a6e72e15b67b37e5b2e35721261ec3da60c045

Author: Greg V <greg at unrelenting.technology>
Date:   Sun Mar  3 18:40:58 2019 +0300

gallium/hud: add CPU usage support for FreeBSD

Reviewed-by: Eric Engestrom <eric at engestrom.ch>

---

 src/gallium/auxiliary/hud/hud_cpu.c | 45 +++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)

diff --git a/src/gallium/auxiliary/hud/hud_cpu.c b/src/gallium/auxiliary/hud/hud_cpu.c
index b7a524330bf..7059226985d 100644
--- a/src/gallium/auxiliary/hud/hud_cpu.c
+++ b/src/gallium/auxiliary/hud/hud_cpu.c
@@ -38,6 +38,11 @@
 #ifdef PIPE_OS_WINDOWS
 #include <windows.h>
 #endif
+#ifdef PIPE_OS_FREEBSD
+#include <sys/types.h>
+#include <sys/sysctl.h>
+#include <sys/resource.h>
+#endif
 
 
 #ifdef PIPE_OS_WINDOWS
@@ -86,6 +91,46 @@ get_cpu_stats(unsigned cpu_index, uint64_t *busy_time, uint64_t *total_time)
    return TRUE;
 }
 
+#elif defined(PIPE_OS_FREEBSD)
+
+static boolean
+get_cpu_stats(unsigned cpu_index, uint64_t *busy_time, uint64_t *total_time)
+{
+   long cp_time[CPUSTATES];
+   size_t len;
+
+   if (cpu_index == ALL_CPUS) {
+      len = sizeof(cp_time);
+
+      if (sysctlbyname("kern.cp_time", cp_time, &len, NULL, 0) == -1)
+         return FALSE;
+   } else {
+      long *cp_times = NULL;
+
+      if (sysctlbyname("kern.cp_times", NULL, &len, NULL, 0) == -1)
+         return FALSE;
+
+      if (len < (cpu_index + 1) * sizeof(cp_time))
+         return FALSE;
+
+      cp_times = malloc(len);
+
+      if (sysctlbyname("kern.cp_times", cp_times, &len, NULL, 0) == -1)
+         return FALSE;
+
+      memcpy(cp_time, cp_times + (cpu_index * CPUSTATES),
+            sizeof(cp_time));
+      free(cp_times);
+   }
+
+   *busy_time = cp_time[CP_USER] + cp_time[CP_NICE] +
+      cp_time[CP_SYS] + cp_time[CP_INTR];
+
+   *total_time = *busy_time + cp_time[CP_IDLE];
+
+   return TRUE;
+}
+
 #else
 
 static boolean