Implement lt_sleep() syscall wrapper

Wrap nanosleep() to make sleeping for a given number of
nanoseconds easier, using the LITMUS^RT time type lt_t.

2 files changed, 14 insertions, 0 deletions

diff --git a/include/litmus.h b/include/litmus.h
index e4b619e..677f9a9 100644
--- a/include/litmus.h
+++ b/include/litmus.h
@@ -129,6 +129,9 @@ static inline lt_t ms2lt(unsigned long milliseconds)
         return __NS_PER_MS * milliseconds;
 }
 
+/* sleep for some number of nanoseconds */
+int lt_sleep(lt_t timeout);
+
 /* CPU time consumed so far in seconds */
 double cputime(void);
 
diff --git a/src/clocks.c b/src/clocks.c
index fcb94e5..74c2fb4 100644
--- a/src/clocks.c
+++ b/src/clocks.c
@@ -3,6 +3,8 @@
 #include <sys/time.h>
 #include <time.h>
 
+#include "litmus.h"
+
 /* CPU time consumed so far in seconds */
 double cputime(void)
 {
@@ -21,3 +23,12 @@ double wctime(void)
         gettimeofday(&tv, NULL);
         return (tv.tv_sec + 1E-6 * tv.tv_usec);
 }
+
+int lt_sleep(lt_t timeout)
+{
+        struct timespec delay;
+
+        delay.tv_sec  = timeout / 1000000000L;
+        delay.tv_nsec = timeout % 1000000000L;
+        return nanosleep(&delay, NULL);
+}