Port: Add OSX clock_gettime compat

[lttng-tools.git] / src / common / compat / time.h

diff --git a/src/common/compat/time.h b/src/common/compat/time.h
new file mode 100644 (file)
index 0000000..f51075d
--- /dev/null
+++ b/src/common/compat/time.h
@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2016 Michael Jeanson <mjeanson@efficios.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#ifndef _COMPAT_TIME_H
+#define _COMPAT_TIME_H
+
+#include <time.h>
+
+#ifdef __APPLE__
+typedef uint64_t timer_t;
+typedef int clockid_t;
+
+#include <mach/mach.h>
+#include <mach/clock.h>
+
+#define CLOCK_REALTIME CALENDAR_CLOCK
+#define CLOCK_MONOTONIC SYSTEM_CLOCK
+
+static inline
+int lttng_clock_gettime(clockid_t clk_id, struct timespec *tp)
+{
+       int ret = 0;
+       clock_serv_t clock;
+       mach_timespec_t now;
+
+       if (clk_id != CLOCK_REALTIME && clk_id != CLOCK_MONOTONIC) {
+               ret = -1;
+               errno = EINVAL;
+               goto end;
+       }
+
+       host_get_clock_service(mach_host_self(), clk_id, &clock);
+
+       ret = clock_get_time(clock, &now);
+       if (ret != KERN_SUCCESS) {
+               ret = -1;
+               goto deallocate;
+       }
+
+        tp->tv_sec = now.tv_sec;
+        tp->tv_nsec = now.tv_nsec;
+
+deallocate:
+       mach_port_deallocate(mach_task_self(), clock);
+end:
+       return ret;
+}
+
+#else /* __APPLE__ */
+
+static inline
+int lttng_clock_gettime(clockid_t clk_id, struct timespec *tp)
+{
+       return clock_gettime(clk_id, tp);
+}
+
+#endif /* __APPLE__ */
+
+#endif /* _COMPAT_TIME_H */