4 files changed, 41 insertions, 2 deletions
diff --git a/lib/Makefile b/lib/Makefile
index 34547e7a..99629d19 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -40,7 +40,12 @@ ifneq (${VMS}x,x)
 LIBOBJECTS += libpbmvms.o
 endif
 # Library objects to be linked but not built by Makefile.common:
-LIBOBJECTS_X = util/shhopt.o util/nstring.o util/vasprintf.o util/filename.o
+LIBOBJECTS_X = \
+  util/shhopt.o \
+  util/nstring.o \
+  util/vasprintf.o \
+  util/filename.o \
+  util/nsleep.o \
 
 MANUALS3 = libnetpbm
 MANUALS5 = pbm pgm ppm pnm pam
diff --git a/lib/util/Makefile b/lib/util/Makefile
index 49396010..7e4d5378 100644
--- a/lib/util/Makefile
+++ b/lib/util/Makefile
@@ -9,7 +9,7 @@ include $(BUILDDIR)/Makefile.config
 
 # nstring is required for asprintf(), etc.  Also some systems don't have
 # snprintf(), e.g. Solaris 2.5.1.  2002.03.29.
-UTILOBJECTS = shhopt.o nstring.o vasprintf.o filename.o
+UTILOBJECTS = shhopt.o nstring.o vasprintf.o filename.o nsleep.o
 
 MERGE_OBJECTS =
 
diff --git a/lib/util/nsleep.c b/lib/util/nsleep.c
new file mode 100644
index 00000000..6e61b3be
--- /dev/null
+++ b/lib/util/nsleep.c
@@ -0,0 +1,27 @@
+#ifdef WIN32
+  #include <windows.h>
+  #include <process.h>
+#else
+  #include <unistd.h>
+#endif
+
+#include "nsleep.h"
+
+
+
+void
+sleepN(unsigned int const milliseconds) {
+
+#ifdef WIN32
+    SleepEx(milliseconds, true);
+#else
+
+    /* We could use usleep() here if millisecond resolution is really
+       important, but since Netpbm has no need for it today, we don't
+       want to deal with the possibility that usleep() doesn't exist.
+       08.08.01.
+    */
+
+    sleep((milliseconds + 999)/1000);
+#endif
+}
diff --git a/lib/util/nsleep.h b/lib/util/nsleep.h
new file mode 100644
index 00000000..372b8008
--- /dev/null
+++ b/lib/util/nsleep.h
@@ -0,0 +1,7 @@
+#ifndef NSLEEP_H_INCLUDED
+#define NSLEEP_H_INCLUDED
+
+void
+sleepN(unsigned int const milliseconds);
+
+#endif