*: librototiller->libtil

Largely mechanical rename of librototiller -> libtil, but
introducing a til_ prefix to all librototiller (now libtil)
functions and types where a rototiller prefix was absent.

This is just a step towards a more libized librototiller, and til
is just a nicer to type/read prefix than rototiller_.

1 files changed, 35 insertions, 0 deletions

diff --git a/src/til_util.c b/src/til_util.c
new file mode 100644
index 0000000..e9b1021
--- /dev/null
+++ b/src/til_util.c
@@ -0,0 +1,35 @@
+#include <limits.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+#ifdef __WIN32__
+#include <windows.h>
+#endif
+
+#include "til_util.h"
+
+#define TIL_SYSFS_CPU	"/sys/devices/system/cpu/cpu"
+#define TIL_MAXCPUS		1024
+
+unsigned til_get_ncpus(void)
+{
+#ifdef __WIN32__
+	SYSTEM_INFO sysinfo;
+
+	GetSystemInfo(&sysinfo);
+
+	return sysinfo.dwNumberOfProcessors;
+#else
+	char		path[cstrlen(TIL_SYSFS_CPU "1024") + 1];
+	unsigned	n;
+
+	for (n = 0; n < TIL_MAXCPUS; n++) {
+		snprintf(path, sizeof(path), "%s%u", TIL_SYSFS_CPU, n);
+		if (access(path, F_OK) == -1)
+			break;
+	}
+
+	return n == 0 ? 1 : n;
+#endif
+}