1 files changed, 41 insertions, 0 deletions
diff --git a/RISCOS/sleep.c b/RISCOS/sleep.c
new file mode 100644
index 0000000..0aeba55
--- /dev/null
+++ b/RISCOS/sleep.c
@@ -0,0 +1,41 @@
+#include "osmodule.h"
+#include <stdio.h>
+#include "kernel.h"
+#include <limits.h>
+#include <errno.h>
+#include "taskwindow.h"
+#include "Python.h"
+
+
+int sleep(double delay)
+{
+	os_t starttime, endtime, time; /* monotonic times (centiseconds) */
+	int *pollword, ret;
+	bool claimed;
+
+        /* calculate end time */
+	starttime = os_read_monotonic_time();
+	if (starttime + 100.0*delay >INT_MAX)
+		endtime = INT_MAX;
+	else
+		endtime = (os_t)(starttime + 100.0*delay);
+
+	/* allocate (in RMA) and set pollword for xupcall_sleep */
+	pollword = osmodule_alloc(4);
+	*pollword = 1;
+
+	time = starttime;
+	ret = 0;
+	while ( time<endtime && time>=starttime ) {
+		xupcall_sleep (pollword, &claimed);
+		if (PyErr_CheckSignals()) {
+			ret = 1;
+			break;
+		}
+		time = os_read_monotonic_time();
+	}
+
+	/* deallocate pollword */
+	osmodule_free(pollword);
+	return ret;
+}