Initial QSfera import

Server/vendor/github.com/ceph/go-ceph/internal/timespec/timespec.go

@@ -0,0 +1,39 @@
+package timespec
+
+/*
+#include <time.h>
+*/
+import "C"
+
+import (
+	"unsafe"
+
+	"golang.org/x/sys/unix"
+)
+
+// Timespec behaves similarly to C's struct timespec.
+// Timespec is used to retain fidelity to the C based file systems
+// apis that could be lossy with the use of Go time types.
+type Timespec unix.Timespec
+
+// CTimespecPtr is an unsafe pointer wrapping C's `struct timespec`.
+type CTimespecPtr unsafe.Pointer
+
+// CStructToTimespec creates a new Timespec for the C 'struct timespec'.
+func CStructToTimespec(cts CTimespecPtr) Timespec {
+	t := (*C.struct_timespec)(cts)
+
+	return Timespec{
+		Sec:  int64(t.tv_sec),
+		Nsec: int64(t.tv_nsec),
+	}
+}
+
+// CopyToCStruct copies the time values from a Timespec to a previously
+// allocated C `struct timespec`. Due to restrictions on Cgo the C pointer
+// must be passed via the CTimespecPtr wrapper.
+func CopyToCStruct(ts Timespec, cts CTimespecPtr) {
+	t := (*C.struct_timespec)(cts)
+	t.tv_sec = C.time_t(ts.Sec)
+	t.tv_nsec = C.long(ts.Nsec)
+}