chore: support go1.17 (#11)

Author: nrwiersma

.github/workflows/test.yml

@@ -10,10 +10,10 @@ jobs:
 
     strategy:
       matrix:
-        go-version: [ 1.15, 1.16 ]
+        go-version: [ 1.16, 1.17 ]
     runs-on: ubuntu-latest
     env:
-      GOLANGCI_LINT_VERSION: v1.41.1
+      GOLANGCI_LINT_VERSION: v1.42.0
 
     steps:
       - name: Install Go

time.go

@@ -1,28 +1,9 @@
 // Package timex provides a fast wall clock source.
 package timex
 
-import (
-	"time"
-	// Required in order to import walltime.
-	_ "unsafe"
-)
-
-//go:linkname walltime runtime.walltime
-func walltime() (int64, int32)
-
-// Now returns the current time in nanoseconds.
-func Now() int64 {
-	sec, nsec := walltime()
-	return sec*1000000000 + int64(nsec)
-}
+import "time"
 
 // Since is analogous to https://golang.org/pkg/time/#Since.
 func Since(s int64) time.Duration {
 	return time.Duration(Now() - s)
 }
-
-// Unix returns the current time in seconds.
-func Unix() int64 {
-	sec, _ := walltime()
-	return sec
-}

time_now.go

@@ -0,0 +1,21 @@
+//go:build !go1.17
+// +build !go1.17
+
+package timex
+
+import _ "unsafe" // for go:linkname
+
+//go:linkname walltime runtime.walltime
+func walltime() (int64, int32)
+
+// Now returns the current time in nanoseconds.
+func Now() int64 {
+	sec, nsec := walltime()
+	return sec*1000000000 + int64(nsec)
+}
+
+// Unix returns the current time in seconds.
+func Unix() int64 {
+	sec, _ := walltime()
+	return sec
+}

time.s renamed to time_now.s

@@ -0,0 +1,21 @@
+//go:build go1.17
+// +build go1.17
+
+package timex
+
+import _ "unsafe" // for go:linkname
+
+//go:linkname now time.now
+func now() (int64, int32, int64)
+
+// Now returns the current time in nanoseconds.
+func Now() int64 {
+	sec, nsec, _ := now()
+	return sec*1000000000 + int64(nsec)
+}
+
+// Unix returns the current time in seconds.
+func Unix() int64 {
+	sec, _, _ := now()
+	return sec
+}