1 files changed, 131 insertions, 0 deletions
diff --git a/gnulib-tests/getrusage.c b/gnulib-tests/getrusage.c
new file mode 100644
index 0000000..5d302d5
--- /dev/null
+++ b/gnulib-tests/getrusage.c
@@ -0,0 +1,131 @@
+/* getrusage replacement for systems which lack it.
+
+   Copyright (C) 2012-2020 Free Software Foundation, Inc.
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible, 2012.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <sys/resource.h>
+
+#include <errno.h>
+#include <string.h>
+
+/* Get uint64_t.  */
+#include <stdint.h>
+
+#if defined _WIN32 && ! defined __CYGWIN__
+
+# define WIN32_LEAN_AND_MEAN
+# include <windows.h>
+
+#else
+
+# include <sys/times.h>
+# include <unistd.h>
+#endif
+
+int
+getrusage (int who, struct rusage *usage_p)
+{
+  if (who == RUSAGE_SELF || who == RUSAGE_CHILDREN)
+    {
+      /* Clear all unsupported members of 'struct rusage'.  */
+      memset (usage_p, '\0', sizeof (struct rusage));
+
+#if defined _WIN32 && ! defined __CYGWIN__
+      if (who == RUSAGE_SELF)
+        {
+          /* Fill in the ru_utime and ru_stime members.  */
+          FILETIME creation_time;
+          FILETIME exit_time;
+          FILETIME kernel_time;
+          FILETIME user_time;
+
+          if (GetProcessTimes (GetCurrentProcess (),
+                               &creation_time, &exit_time,
+                               &kernel_time, &user_time))
+            {
+              /* Convert to microseconds, rounding.  */
+              uint64_t kernel_usec =
+                ((((uint64_t) kernel_time.dwHighDateTime << 32)
+                  | (uint64_t) kernel_time.dwLowDateTime)
+                 + 5) / 10;
+              uint64_t user_usec =
+                ((((uint64_t) user_time.dwHighDateTime << 32)
+                  | (uint64_t) user_time.dwLowDateTime)
+                 + 5) / 10;
+
+              usage_p->ru_utime.tv_sec = user_usec / 1000000U;
+              usage_p->ru_utime.tv_usec = user_usec % 1000000U;
+              usage_p->ru_stime.tv_sec = kernel_usec / 1000000U;
+              usage_p->ru_stime.tv_usec = kernel_usec % 1000000U;
+            }
+        }
+#else
+      /* Fill in the ru_utime and ru_stime members.  */
+      {
+        struct tms time;
+
+        if (times (&time) != (clock_t) -1)
+          {
+            /* Number of clock ticks per second.  */
+            unsigned int clocks_per_second = sysconf (_SC_CLK_TCK);
+
+            if (clocks_per_second > 0)
+              {
+                clock_t user_ticks;
+                clock_t system_ticks;
+
+                uint64_t user_usec;
+                uint64_t system_usec;
+
+                if (who == RUSAGE_CHILDREN)
+                  {
+                    user_ticks   = time.tms_cutime;
+                    system_ticks = time.tms_cstime;
+                  }
+                else
+                  {
+                    user_ticks   = time.tms_utime;
+                    system_ticks = time.tms_stime;
+                  }
+
+                user_usec =
+                  (((uint64_t) user_ticks * (uint64_t) 1000000U)
+                   + clocks_per_second / 2) / clocks_per_second;
+                system_usec =
+                  (((uint64_t) system_ticks * (uint64_t) 1000000U)
+                   + clocks_per_second / 2) / clocks_per_second;
+
+                usage_p->ru_utime.tv_sec = user_usec / 1000000U;
+                usage_p->ru_utime.tv_usec = user_usec % 1000000U;
+                usage_p->ru_stime.tv_sec = system_usec / 1000000U;
+                usage_p->ru_stime.tv_usec = system_usec % 1000000U;
+              }
+          }
+      }
+#endif
+
+      return 0;
+    }
+  else
+    {
+      errno = EINVAL;
+      return -1;
+    }
+}