Rename C++ header files to .hpp

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

diff --git a/src/common/compat/time.hpp b/src/common/compat/time.hpp
new file mode 100644 (file)
index 0000000..37f472a
--- /dev/null
+++ b/src/common/compat/time.hpp
@@ -0,0 +1,75 @@
+/*
+ * Copyright (C) 2016 Michael Jeanson <mjeanson@efficios.com>
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ */
+
+#ifndef _COMPAT_TIME_H
+#define _COMPAT_TIME_H
+
+#include <time.h>
+
+#ifdef __APPLE__
+
+typedef uint64_t timer_t;
+
+#include <mach/mach.h>
+#include <mach/clock.h>
+#include <common/compat/errno.hpp>
+
+#undef NSEC_PER_SEC
+#undef NSEC_PER_MSEC
+#undef NSEC_PER_USEC
+#undef USEC_PER_SEC
+
+#endif /* __APPLE__ */
+
+/* macOS/OS X 10.12 (Sierra) and up provide clock_gettime() */
+#if defined(__APPLE__) && !defined(LTTNG_HAVE_CLOCK_GETTIME)
+
+typedef int clockid_t;
+#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__ && !LTTNG_HAVE_CLOCK_GETTIME */
+
+static inline
+int lttng_clock_gettime(clockid_t clk_id, struct timespec *tp)
+{
+       return clock_gettime(clk_id, tp);
+}
+
+#endif /* __APPLE__ && !LTTNG_HAVE_CLOCK_GETTIME */
+
+#endif /* _COMPAT_TIME_H */