[vlc-commits] compat: add clock_getres for darwin

[Marvin Scholz]

vlc | branch: master | Marvin Scholz <epirat07 at gmail.com> | Sun Mar 22 09:19:50 2020 +0100| [9999b4f54c6b01e09185fbdf612ebc68f66d0c0c] | committer: Marvin Scholz

compat: add clock_getres for darwin

> http://git.videolan.org/gitweb.cgi/vlc.git/?a=commit;h=9999b4f54c6b01e09185fbdf612ebc68f66d0c0c
---

 compat/clock_getres.c | 54 +++++++++++++++++++++++++++++++++++++++++++++++++++
 configure.ac          |  2 +-
 include/vlc_fixups.h  |  3 +++
 3 files changed, 58 insertions(+), 1 deletion(-)

diff --git a/compat/clock_getres.c b/compat/clock_getres.c
new file mode 100644
index 0000000000..b30bcdc96b
--- /dev/null
+++ b/compat/clock_getres.c
@@ -0,0 +1,54 @@
+/*****************************************************************************
+ * clock_getres.c: POSIX clock_getres() replacement
+ *****************************************************************************
+ * Copyright © 2020 VLC authors and VideoLAN
+ *
+ * Author: Marvin Scholz <epirat07 at gmail dot com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2.1 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+#ifdef __APPLE__
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <sys/errno.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <mach/clock_types.h>
+
+int clock_getres(clockid_t clock_id, struct timespec *tp)
+{
+    switch (clock_id) {
+        case CLOCK_MONOTONIC:
+        case CLOCK_REALTIME:
+            // For realtime, it is using gettimeofday and for
+            // the monotonic time it is relative to the system
+            // boot time. Both of these use timeval, which has
+            // at best microsecond precision.
+            tp->tv_sec = 0;
+            tp->tv_nsec = NSEC_PER_USEC;
+            break;
+        default:
+            errno = EINVAL;
+            return -1;
+    }
+
+    return 0;
+}
+
+#endif
diff --git a/configure.ac b/configure.ac
index 1dedd7c7a6..b52cb8ce8d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -930,7 +930,7 @@ AC_SUBST([LIBRT])
 
 dnl  Check for clock_* functions, needs to be done here,
 dnl  after the -lrt check
-AC_REPLACE_FUNCS([clock_gettime clock_nanosleep])
+AC_REPLACE_FUNCS([clock_gettime clock_nanosleep clock_getres])
 
 dnl
 dnl Check for headers
diff --git a/include/vlc_fixups.h b/include/vlc_fixups.h
index a296db0c32..25c7de473e 100644
--- a/include/vlc_fixups.h
+++ b/include/vlc_fixups.h
@@ -672,6 +672,9 @@ FILE *vlc_win32_tmpfile(void);
 # ifndef HAVE_CLOCK_GETTIME
 int clock_gettime(clockid_t clock_id, struct timespec *tp);
 # endif
+# ifndef HAVE_CLOCK_GETRES
+int clock_getres(clockid_t clock_id, struct timespec *tp);
+# endif
 # ifndef HAVE_CLOCK_NANOSLEEP
 int clock_nanosleep(clockid_t clock_id, int flags,
         const struct timespec *rqtp, struct timespec *rmtp);