1 files changed, 20 insertions, 0 deletions
diff --git a/libhw/host_bootclock.c b/libhw/host_bootclock.c
new file mode 100644
index 0000000..ca9565c
--- /dev/null
+++ b/libhw/host_bootclock.c
@@ -0,0 +1,20 @@
+/* libhw/host_bootclock.c - <libhw/generic/bootclock.h> implementation for POSIX hosts
+ *
+ * Copyright (C) 2024  Luke T. Shumaker <lukeshu@lukeshu.com>
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+
+#include <assert.h>
+#include <time.h> /* for clock_gettime(), CLOCK_MONOTONIC, struct timespec */
+
+#include <libhw/generic/bootclock.h>
+
+uint64_t bootclock_get_ns(void) {
+	struct timespec ts;
+	int r;
+
+	r = clock_gettime(CLOCK_MONOTONIC, &ts);
+	assert(r == 0);
+
+	return (((uint64_t)ts.tv_sec) * NS_PER_S) + (uint64_t)ts.tv_nsec;
+}