aboutsummaryrefslogtreecommitdiffhomepage
path: root/vendor/golang.org/x/sys/unix/dev_freebsd.go
diff options
context:
space:
mode:
Diffstat (limited to 'vendor/golang.org/x/sys/unix/dev_freebsd.go')
-rw-r--r--vendor/golang.org/x/sys/unix/dev_freebsd.go30
1 files changed, 30 insertions, 0 deletions
diff --git a/vendor/golang.org/x/sys/unix/dev_freebsd.go b/vendor/golang.org/x/sys/unix/dev_freebsd.go
new file mode 100644
index 0000000..eba3b4b
--- /dev/null
+++ b/vendor/golang.org/x/sys/unix/dev_freebsd.go
@@ -0,0 +1,30 @@
1// Copyright 2017 The Go Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5// Functions to access/create device major and minor numbers matching the
6// encoding used in FreeBSD's sys/types.h header.
7//
8// The information below is extracted and adapted from sys/types.h:
9//
10// Minor gives a cookie instead of an index since in order to avoid changing the
11// meanings of bits 0-15 or wasting time and space shifting bits 16-31 for
12// devices that don't use them.
13
14package unix
15
16// Major returns the major component of a FreeBSD device number.
17func Major(dev uint64) uint32 {
18 return uint32((dev >> 8) & 0xff)
19}
20
21// Minor returns the minor component of a FreeBSD device number.
22func Minor(dev uint64) uint32 {
23 return uint32(dev & 0xffff00ff)
24}
25
26// Mkdev returns a FreeBSD device number generated from the given major and
27// minor components.
28func Mkdev(major, minor uint32) uint64 {
29 return (uint64(major) << 8) | uint64(minor)
30}