base: Clean up base/hostinfo

General fixes to the style of base/hostinfo.(cc|hh).

Remove unnecessary includes.

Remove signature of private functions from header.

Add documentation.

Remove unnecessary include in sim_events.cc.

Change-Id: I54e1f13231e512d26cf0127cc80256fb5e91bf91
Signed-off-by: Daniel R. Carvalho <odanrc@yahoo.com.br>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/41393
Reviewed-by: Bobby R. Bruce <bbruce@ucdavis.edu>
Maintainer: Bobby R. Bruce <bbruce@ucdavis.edu>
Tested-by: kokoro <noreply+kokoro@google.com>

src/base/hostinfo.hh

@@ -29,20 +29,20 @@
 #ifndef __HOSTINFO_HH__
 #define __HOSTINFO_HH__
 
+#include <cstdint>
 #include <string>
 
-#include "base/types.hh"
-
-std::string __get_hostname();
-
+/**
+ * Get the host name for the current machine.
+ *
+ * @return The machine's host name.
+ */
 std::string &hostname();
 
-uint64_t procInfo(const char *filename, const char *target);
-
 /**
  * Determine the simulator process' total virtual memory usage.
  *
- * @return virtual memory usage in kilobytes
+ * @return Virtual memory usage in kilobytes
  */
 uint64_t memUsage();