1 files changed, 127 insertions, 0 deletions
diff --git a/netcpu_sysctl.c b/netcpu_sysctl.c
new file mode 100644
index 0000000..919f62c
--- /dev/null
+++ b/netcpu_sysctl.c
@@ -0,0 +1,127 @@
+char   netcpu_sysctl_id[]="\
+@(#)netcpu_sysctl.c  Version 2.4.3";
+
+#if HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <stdio.h>
+#include <unistd.h>
+
+#if HAVE_INTTYPES_H
+# include <inttypes.h>
+#else
+# if HAVE_STDINT_H
+#  include <stdint.h>
+# endif
+#endif
+
+#if TIME_WITH_SYS_TIME
+# include <sys/time.h>
+# include <time.h>
+#else
+# if HAVE_SYS_TIME_H
+#  include <sys/time.h>
+# else
+#  include <time.h>
+# endif
+#endif
+#if HAVE_LIMITS_H
+# include <limits.h>
+# ifndef LONG_LONG_MAX
+#  define LONG_LONG_MAX LLONG_MAX
+# endif /* LONG_LONG_MAX */
+#endif
+
+
+#include <errno.h>
+
+/* need to have some sort of check for sys/sysctl.h versus sysctl.h */
+#include <sys/sysctl.h>
+
+
+/* this has been liberally cut and pasted from <sys/resource.h> on
+   FreeBSD. in general, this would be a bad idea, but I don't want to
+   have to do a _KERNEL define to get these and that is what
+   sys/resource.h seems to want. raj 2002-03-03 */
+#define CP_USER         0
+#define CP_NICE         1
+#define CP_SYS          2
+#define CP_INTR         3
+#define CP_IDLE         4
+#define CPUSTATES       5
+
+
+#include "netsh.h"
+#include "netlib.h"
+
+static long lib_start_count[CPUSTATES];
+static long lib_end_count[CPUSTATES];
+
+void
+cpu_util_init(void) 
+{
+  return;
+}
+
+void
+cpu_util_terminate(void)
+{
+  return;
+}
+
+int
+get_cpu_method(void)
+{
+  return SYSCTL;
+}
+
+static void
+get_cpu_time(long *cpu_time)
+{
+  size_t cpu_time_len = CPUSTATES * sizeof (cpu_time[0]);
+
+  if (sysctlbyname("kern.cp_time", cpu_time, &cpu_time_len, NULL, 0) == -1) {
+      fprintf (stderr, "Cannot get CPU time!\n");
+      exit (1);
+  }
+}
+
+/* calibrate_sysctl  - perform the idle rate calculation using the
+   sysctl call - typically on BSD */
+
+float
+calibrate_idle_rate(int iterations, int interval)
+{
+  return sysconf (_SC_CLK_TCK);
+}
+
+float
+calc_cpu_util_internal(float elapsed_time)
+{
+  long sum_idle, sum_busy;
+  int i;
+
+  for (sum_busy = 0, i = 0; i < CPUSTATES; i++) {
+    if (i != CP_IDLE)
+      sum_busy += lib_end_count[i] - lib_start_count[i];
+  }
+
+  sum_idle = lib_end_count[CP_IDLE] - lib_start_count[CP_IDLE];
+  lib_local_cpu_util = (float)sum_busy / (float)(sum_busy + sum_idle);
+  lib_local_cpu_util *= 100.0;
+
+  return lib_local_cpu_util;
+
+}
+void
+cpu_start_internal(void)
+{
+  get_cpu_time(lib_start_count);
+}
+
+void
+cpu_stop_internal(void)
+{
+  get_cpu_time(lib_end_count);
+}