Kernel+LibC: Implement clock_gettime() and clock_nanosleep()

Only the CLOCK_MONOTONIC clock is supported at the moment, and it only
has millisecond precision. :^)

2 files changed, 27 insertions, 5 deletions

diff --git a/Libraries/LibC/time.cpp b/Libraries/LibC/time.cpp
index 6024664fed..8a301b3bb5 100644
--- a/Libraries/LibC/time.cpp
+++ b/Libraries/LibC/time.cpp
@@ -117,4 +117,18 @@ clock_t clock()
     times(&tms);
     return tms.tms_utime + tms.tms_stime;
 }
+
+int clock_gettime(clockid_t clock_id, struct timespec* ts)
+{
+    int rc = syscall(SC_clock_gettime, clock_id, ts);
+    __RETURN_WITH_ERRNO(rc, rc, -1);
+}
+
+int clock_nanosleep(clockid_t clock_id, int flags, const struct timespec* requested_sleep, struct timespec* remaining_sleep)
+{
+    Syscall::SC_clock_nanosleep_params params { clock_id, flags, requested_sleep, remaining_sleep };
+    int rc = syscall(SC_clock_nanosleep, &params);
+    __RETURN_WITH_ERRNO(rc, rc, -1);
+}
+
 }
diff --git a/Libraries/LibC/time.h b/Libraries/LibC/time.h
index 0a720dadf4..fec9076e99 100644
--- a/Libraries/LibC/time.h
+++ b/Libraries/LibC/time.h
@@ -36,15 +36,23 @@ char* asctime(const struct tm*);
 #define CLOCKS_PER_SEC 1000
 clock_t clock();
 
+struct timespec {
+    time_t tv_sec;
+    long tv_nsec;
+};
+
+typedef int clockid_t;
+
+#define CLOCK_MONOTONIC 1
+#define TIMER_ABSTIME 99
+
+int clock_gettime(clockid_t, struct timespec*);
+int clock_nanosleep(clockid_t, int flags, const struct timespec* requested_sleep, struct timespec* remaining_sleep);
+
 double difftime(time_t, time_t);
 size_t strftime(char* s, size_t max, const char* format, const struct tm*);
 
 #define difftime(t1, t0) (double)(t1 - t0)
 
-// This is c++11+, but we have no macro for that now.
-struct timespec {
-    time_t tv_sec;
-    long tv_nsec;
-};
 
 __END_DECLS