runtime: wrap nanotime, walltime, and write

In preparation for general faketime support, this renames the existing
nanotime, walltime, and write functions to nanotime1, walltime1, and
write1 and wraps them with trivial Go functions. This will let us
inject different implementations on all platforms when faketime is
enabled.

Updates #30439.

Change-Id: Ice5ccc513a32a6d89ea051638676d3ee05b00418
Reviewed-on: https://go-review.googlesource.com/c/go/+/192738
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

1 files changed, 25 insertions, 0 deletions

diff --git a/src/runtime/time_nofake.go b/src/runtime/time_nofake.go
new file mode 100644
index 0000000000..233097d170
--- /dev/null
+++ b/src/runtime/time_nofake.go
@@ -0,0 +1,25 @@
+// Copyright 2019 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !nacl
+
+package runtime
+
+import "unsafe"
+
+//go:nosplit
+func nanotime() int64 {
+	return nanotime1()
+}
+
+func walltime() (sec int64, nsec int32) {
+	return walltime1()
+}
+
+// write must be nosplit on Windows (see write1)
+//
+//go:nosplit
+func write(fd uintptr, p unsafe.Pointer, n int32) int32 {
+	return write1(fd, p, n)
+}