1 files changed, 0 insertions, 62 deletions
diff --git a/vendor/github.com/twitchyliquid64/golang-asm/bio/buf_mmap.go b/vendor/github.com/twitchyliquid64/golang-asm/bio/buf_mmap.go
deleted file mode 100644
index 4b43d74f2..000000000
--- a/vendor/github.com/twitchyliquid64/golang-asm/bio/buf_mmap.go
+++ /dev/null
@@ -1,62 +0,0 @@
-// 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 darwin dragonfly freebsd linux netbsd openbsd
-
-package bio
-
-import (
-	"runtime"
-	"sync/atomic"
-	"syscall"
-)
-
-// mmapLimit is the maximum number of mmaped regions to create before
-// falling back to reading into a heap-allocated slice. This exists
-// because some operating systems place a limit on the number of
-// distinct mapped regions per process. As of this writing:
-//
-//  Darwin    unlimited
-//  DragonFly   1000000 (vm.max_proc_mmap)
-//  FreeBSD   unlimited
-//  Linux         65530 (vm.max_map_count) // TODO: query /proc/sys/vm/max_map_count?
-//  NetBSD    unlimited
-//  OpenBSD   unlimited
-var mmapLimit int32 = 1<<31 - 1
-
-func init() {
-	// Linux is the only practically concerning OS.
-	if runtime.GOOS == "linux" {
-		mmapLimit = 30000
-	}
-}
-
-func (r *Reader) sliceOS(length uint64) ([]byte, bool) {
-	// For small slices, don't bother with the overhead of a
-	// mapping, especially since we have no way to unmap it.
-	const threshold = 16 << 10
-	if length < threshold {
-		return nil, false
-	}
-
-	// Have we reached the mmap limit?
-	if atomic.AddInt32(&mmapLimit, -1) < 0 {
-		atomic.AddInt32(&mmapLimit, 1)
-		return nil, false
-	}
-
-	// Page-align the offset.
-	off := r.Offset()
-	align := syscall.Getpagesize()
-	aoff := off &^ int64(align-1)
-
-	data, err := syscall.Mmap(int(r.f.Fd()), aoff, int(length+uint64(off-aoff)), syscall.PROT_READ, syscall.MAP_SHARED|syscall.MAP_FILE)
-	if err != nil {
-		return nil, false
-	}
-
-	data = data[off-aoff:]
-	r.MustSeek(int64(length), 1)
-	return data, true
-}