CpuUsage: support freebsd

src/detection/cpuUsage/cpuUsage_bsd.c

@@ -0,0 +1,19 @@
+#include "cpuUsage.h"
+
+#include <sys/types.h>
+#include <sys/user.h>
+#include <sys/sysctl.h>
+
+const char* ffGetCpuUsageInfo(uint64_t* inUseAll, uint64_t* totalAll)
+{
+    // interrupt processing, user processes, system processing, lock spinning, and idling
+    uint64_t cpTime[5];
+    size_t neededLength = sizeof(cpTime);
+    if(sysctlbyname("kern.cp_time", cpTime, &neededLength, NULL, 0) != 0)
+        return "sysctlbyname(kern.cp_time) failed";
+
+    *inUseAll = cpTime[0] + cpTime[1] + cpTime[2] + cpTime[3];
+    *totalAll = *inUseAll + cpTime[4];
+
+    return NULL;
+}