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path: root/vendor/modernc.org/memory/mmap_unix.go
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Diffstat (limited to 'vendor/modernc.org/memory/mmap_unix.go')
-rw-r--r--vendor/modernc.org/memory/mmap_unix.go74
1 files changed, 0 insertions, 74 deletions
diff --git a/vendor/modernc.org/memory/mmap_unix.go b/vendor/modernc.org/memory/mmap_unix.go
deleted file mode 100644
index de57b8823..000000000
--- a/vendor/modernc.org/memory/mmap_unix.go
+++ /dev/null
@@ -1,74 +0,0 @@
-// Copyright 2011 Evan Shaw. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE-MMAP-GO file.
-
-//go:build darwin || dragonfly || freebsd || linux || (solaris && !illumos) || netbsd
-// +build darwin dragonfly freebsd linux solaris,!illumos netbsd
-
-// Modifications (c) 2017 The Memory Authors.
-
-package memory // import "modernc.org/memory"
-
-import (
- "os"
- "syscall"
-)
-
-const pageSizeLog = 20
-
-var (
- osPageMask = osPageSize - 1
- osPageSize = os.Getpagesize()
-)
-
-func unmap(addr uintptr, size int) error {
- _, _, errno := syscall.Syscall(syscall.SYS_MUNMAP, addr, uintptr(size), 0)
- if errno != 0 {
- return errno
- }
-
- return nil
-}
-
-// pageSize aligned.
-func mmap(size int) (uintptr, int, error) {
- size = roundup(size, osPageSize)
-
- // The actual mmap syscall varies by architecture. mmapSyscall provides same
- // functionality as the unexported funtion syscall.mmap and is declared in
- // mmap_*_*.go and mmap_fallback.go. To add support for a new architecture,
- // check function mmap in src/syscall/syscall_*_*.go or
- // src/syscall/zsyscall_*_*.go in Go's source code.
- p, err := mmapSyscall(0, uintptr(size+pageSize), syscall.PROT_READ|syscall.PROT_WRITE, syscall.MAP_PRIVATE|syscall.MAP_ANON, -1, 0)
- if err != nil {
- return 0, 0, err
- }
-
- n := size + pageSize
- if p&uintptr(osPageMask) != 0 {
- panic("internal error")
- }
-
- mod := int(p) & pageMask
- if mod != 0 {
- m := pageSize - mod
- if err := unmap(p, m); err != nil {
- return 0, 0, err
- }
-
- n -= m
- p += uintptr(m)
- }
-
- if p&uintptr(pageMask) != 0 {
- panic("internal error")
- }
-
- if n-size != 0 {
- if err := unmap(p+uintptr(size), n-size); err != nil {
- return 0, 0, err
- }
- }
-
- return p, size, nil
-}