1 files changed, 72 insertions, 0 deletions
diff --git a/contrib/ntp/libntp/lib_strbuf.c b/contrib/ntp/libntp/lib_strbuf.c
new file mode 100644
index 000000000000..225c430f7e02
--- /dev/null
+++ b/contrib/ntp/libntp/lib_strbuf.c
@@ -0,0 +1,72 @@
+/*
+ * lib_strbuf.c - init_lib() and library string storage
+ */
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <isc/mutex.h>
+#include <isc/net.h>
+#include <isc/result.h>
+
+#include "ntp_fp.h"
+#include "ntp_stdlib.h"
+#include "lib_strbuf.h"
+
+#define LIB_NUMBUF	10
+
+/*
+ * Storage declarations
+ */
+static char		lib_stringbuf_storage[LIB_NUMBUF][LIB_BUFLENGTH];
+static char *		lib_stringbuf[LIB_NUMBUF];
+int			lib_inited;
+static isc_mutex_t	lib_mutex;
+int			ipv4_works;
+int			ipv6_works;
+int			debug;
+
+/*
+ * initialization routine.  Might be needed if the code is ROMized.
+ */
+void
+init_lib(void)
+{
+	u_int	u;
+
+	if (lib_inited) {
+		return;
+	}
+	ipv4_works = (ISC_R_SUCCESS == isc_net_probeipv4());
+	ipv6_works = (ISC_R_SUCCESS == isc_net_probeipv6());
+	init_systime();
+	/*
+	 * Avoid -Wrestrict warnings by keeping a pointer to each buffer
+	 * so the compiler can see copying from one buffer to another is
+	 * not violating restrict qualifiers on, e.g. memcpy() args.
+	 */
+	for (u = 0; u < COUNTOF(lib_stringbuf); u++) {
+		lib_stringbuf[u] = lib_stringbuf_storage[u];
+	}
+	isc_mutex_init(&lib_mutex);
+	lib_inited = TRUE;
+}
+
+
+char *
+lib_getbuf(void)
+{
+	static int	lib_nextbuf;
+	int		mybuf;
+
+	if (!lib_inited) {
+		init_lib();
+	}
+	isc_mutex_lock(&lib_mutex);
+	mybuf = lib_nextbuf;
+	lib_nextbuf = (1 + mybuf) % COUNTOF(lib_stringbuf);
+	isc_mutex_unlock(&lib_mutex);
+	zero_mem(lib_stringbuf[mybuf], LIB_BUFLENGTH);
+
+	return lib_stringbuf[mybuf];
+}
+\ No newline at end of file