utils: Implement -j properly.

[goals.git] / src / utils-c.c

diff --git a/src/utils-c.c b/src/utils-c.c
new file mode 100644 (file)
index 0000000..3c6554f
--- /dev/null
+++ b/src/utils-c.c
@@ -0,0 +1,45 @@
+/* Goalfile utilities
+ * Copyright (C) 2020 Richard W.M. Jones
+ * Copyright (C) 2020 Red Hat 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 2 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, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include <config.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <caml/memory.h>
+#include <caml/mlvalues.h>
+
+#ifdef HAVE_SYS_SYSINFO_H
+#include <sys/sysinfo.h>
+#endif
+
+value
+nprocs (value unitv)
+{
+  CAMLparam1 (unitv);
+  int n;
+
+#ifdef HAVE_GET_NPROCS
+  n = get_nprocs ();
+#else
+  n = 1;
+#endif
+
+  CAMLreturn (Val_int (n));
+}