1 files changed, 62 insertions, 0 deletions
diff --git a/fluent-bit/lib/cfl/src/cfl_time.c b/fluent-bit/lib/cfl/src/cfl_time.c
new file mode 100644
index 00000000..262cf744
--- /dev/null
+++ b/fluent-bit/lib/cfl/src/cfl_time.c
@@ -0,0 +1,62 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+
+/*  CFL
+ *  ===
+ *  Copyright (C) 2022 The CFL Authors
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ */
+
+#include <cfl/cfl.h>
+
+/* MacOS */
+#ifdef CFL_HAVE_CLOCK_GET_TIME
+#include <mach/clock.h>
+#include <mach/mach.h>
+#endif
+
+#include <inttypes.h>
+#include <time.h>
+
+uint64_t cfl_time_now()
+{
+    struct timespec tm = {0};
+
+    /*
+     * macOS note: newer versions of macOS provides a timespec_get() function, but for
+     * some reason it does not provide full nanoseconds resolution, last 3 digits are
+     * always zeros.
+     *
+     * if CFL_HAVE_CLOCK_GET_TIME and CFL_HAVE_TIMESPEC_GET are defined, let's
+     * prioritize CFL_HAVE_CLOCK_GET_TIME.
+     */
+
+#if defined CFL_HAVE_CLOCK_GET_TIME
+    /* MacOS */
+    clock_serv_t cclock;
+    mach_timespec_t mts;
+    host_get_clock_service(mach_host_self(), CALENDAR_CLOCK, &cclock);
+    clock_get_time(cclock, &mts);
+    tm.tv_sec = mts.tv_sec;
+    tm.tv_nsec = mts.tv_nsec;
+    mach_port_deallocate(mach_task_self(), cclock);
+#elif defined CFL_HAVE_TIMESPEC_GET
+    /* C11 supported */
+    timespec_get(&tm, TIME_UTC);
+
+#else /* __STDC_VERSION__ */
+    clock_gettime(CLOCK_REALTIME, &tm);
+#endif
+
+    return (((uint64_t) tm.tv_sec * 1000000000L) + tm.tv_nsec);
+}