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author | 2023-07-10 12:43:32 +0100 | |
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committer | 2023-07-10 12:43:32 +0100 | |
commit | 6de5ca46f80c4e0d5bfc2df42a8d6af3757a312b (patch) | |
tree | 52b87f98db9edbe56832a669a200ee0d7220e91c /vendor/golang.org/x/sys/unix/mremap.go | |
parent | [chore]: Bump golang.org/x/image from 0.8.0 to 0.9.0 (#1972) (diff) | |
download | gotosocial-6de5ca46f80c4e0d5bfc2df42a8d6af3757a312b.tar.xz |
[chore]: Bump golang.org/x/net from 0.11.0 to 0.12.0 (#1973)
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Diffstat (limited to 'vendor/golang.org/x/sys/unix/mremap.go')
-rw-r--r-- | vendor/golang.org/x/sys/unix/mremap.go | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/vendor/golang.org/x/sys/unix/mremap.go b/vendor/golang.org/x/sys/unix/mremap.go new file mode 100644 index 000000000..86213c05d --- /dev/null +++ b/vendor/golang.org/x/sys/unix/mremap.go @@ -0,0 +1,40 @@ +// Copyright 2023 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. + +//go:build linux +// +build linux + +package unix + +import "unsafe" + +type mremapMmapper struct { + mmapper + mremap func(oldaddr uintptr, oldlength uintptr, newlength uintptr, flags int, newaddr uintptr) (xaddr uintptr, err error) +} + +func (m *mremapMmapper) Mremap(oldData []byte, newLength int, flags int) (data []byte, err error) { + if newLength <= 0 || len(oldData) == 0 || len(oldData) != cap(oldData) || flags&MREMAP_FIXED != 0 { + return nil, EINVAL + } + + pOld := &oldData[cap(oldData)-1] + m.Lock() + defer m.Unlock() + bOld := m.active[pOld] + if bOld == nil || &bOld[0] != &oldData[0] { + return nil, EINVAL + } + newAddr, errno := m.mremap(uintptr(unsafe.Pointer(&bOld[0])), uintptr(len(bOld)), uintptr(newLength), flags, 0) + if errno != nil { + return nil, errno + } + bNew := unsafe.Slice((*byte)(unsafe.Pointer(newAddr)), newLength) + pNew := &bNew[cap(bNew)-1] + if flags&MREMAP_DONTUNMAP == 0 { + delete(m.active, pOld) + } + m.active[pNew] = bNew + return bNew, nil +} |