move Rust sources to top level, C sources into c_src

[bcachefs-tools-debian] / c_src / include / linux / time64.h

diff --git a/c_src/include/linux/time64.h b/c_src/include/linux/time64.h
new file mode 100644 (file)
index 0000000..cd6cc1c
--- /dev/null
+++ b/c_src/include/linux/time64.h
@@ -0,0 +1,51 @@
+#ifndef _LINUX_TIME64_H
+#define _LINUX_TIME64_H
+
+#include <linux/types.h>
+
+#define timespec64  timespec
+
+typedef __s64 time64_t;
+
+/* Parameters used to convert the timespec values: */
+#define MSEC_PER_SEC   1000L
+#define USEC_PER_MSEC  1000L
+#define NSEC_PER_USEC  1000L
+#define NSEC_PER_MSEC  1000000L
+#define USEC_PER_SEC   1000000L
+#define NSEC_PER_SEC   1000000000L
+#define FSEC_PER_SEC   1000000000000000LL
+
+static inline struct timespec ns_to_timespec(const u64 nsec)
+{
+       return (struct timespec) {
+               .tv_sec = nsec / NSEC_PER_SEC,
+               .tv_nsec = nsec % NSEC_PER_SEC,
+       };
+}
+
+static inline s64 timespec_to_ns(const struct timespec *ts)
+{
+       return ((s64) ts->tv_sec * NSEC_PER_SEC) + ts->tv_nsec;
+}
+
+static inline struct timespec timespec_trunc(struct timespec t, unsigned gran)
+{
+       /* Avoid division in the common cases 1 ns and 1 s. */
+       if (gran == 1) {
+               /* nothing */
+       } else if (gran == NSEC_PER_SEC) {
+               t.tv_nsec = 0;
+       } else if (gran > 1 && gran < NSEC_PER_SEC) {
+               t.tv_nsec -= t.tv_nsec % gran;
+       } else {
+               WARN(1, "illegal file time granularity: %u", gran);
+       }
+       return t;
+}
+
+#define ns_to_timespec64       ns_to_timespec
+#define timespec64_to_ns       timespec_to_ns
+#define timespec64_trunc       timespec_trunc
+
+#endif /* _LINUX_TIME64_H */