aboutsummaryrefslogtreecommitdiff
path: root/vendor/golang.org/x/sys/unix/dev_dragonfly.go
diff options
context:
space:
mode:
authorJoseph Richey <joerichey@google.com>2017-09-29 03:16:43 -0700
committerGitHub <noreply@github.com>2017-09-29 03:16:43 -0700
commitd6efd2ab463e82cc3a78860384f26d809bd76ce5 (patch)
treef2fbf84f4e160d0d5e107ee05338be5e0133f01b /vendor/golang.org/x/sys/unix/dev_dragonfly.go
parent3ca15548454f773ea3290f810ed1b1d55fec1783 (diff)
parentddcc450fc6d78806a0d0369bb1cdc2155f4e328e (diff)
Merge pull request #64 from google/new_values
Update all external dependencies to the latest version
Diffstat (limited to 'vendor/golang.org/x/sys/unix/dev_dragonfly.go')
-rw-r--r--vendor/golang.org/x/sys/unix/dev_dragonfly.go30
1 files changed, 30 insertions, 0 deletions
diff --git a/vendor/golang.org/x/sys/unix/dev_dragonfly.go b/vendor/golang.org/x/sys/unix/dev_dragonfly.go
new file mode 100644
index 0000000..8502f20
--- /dev/null
+++ b/vendor/golang.org/x/sys/unix/dev_dragonfly.go
@@ -0,0 +1,30 @@
+// Copyright 2017 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.
+
+// Functions to access/create device major and minor numbers matching the
+// encoding used in Dragonfly's sys/types.h header.
+//
+// The information below is extracted and adapted from sys/types.h:
+//
+// Minor gives a cookie instead of an index since in order to avoid changing the
+// meanings of bits 0-15 or wasting time and space shifting bits 16-31 for
+// devices that don't use them.
+
+package unix
+
+// Major returns the major component of a DragonFlyBSD device number.
+func Major(dev uint64) uint32 {
+ return uint32((dev >> 8) & 0xff)
+}
+
+// Minor returns the minor component of a DragonFlyBSD device number.
+func Minor(dev uint64) uint32 {
+ return uint32(dev & 0xffff00ff)
+}
+
+// Mkdev returns a DragonFlyBSD device number generated from the given major and
+// minor components.
+func Mkdev(major, minor uint32) uint64 {
+ return (uint64(major) << 8) | uint64(minor)
+}