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Ian LewisandgVisor bot
d1ab856135
Both marshal and usermem are depended on by many packages and a dependency on marshal can often create circular dependencies. marshal should consider adding internal dependencies carefully moving forward. Fixes #6160 PiperOrigin-RevId: 379199882
44 lines
1.4 KiB
Go
44 lines
1.4 KiB
Go
// Copyright 2021 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package usermem
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import (
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"gvisor.dev/gvisor/pkg/context"
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"gvisor.dev/gvisor/pkg/hostarch"
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)
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// IOCopyContext wraps an object implementing hostarch.IO to implement
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// marshal.CopyContext.
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type IOCopyContext struct {
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Ctx context.Context
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IO IO
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Opts IOOpts
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}
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// CopyScratchBuffer implements marshal.CopyContext.CopyScratchBuffer.
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func (i *IOCopyContext) CopyScratchBuffer(size int) []byte {
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return make([]byte, size)
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}
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// CopyOutBytes implements marshal.CopyContext.CopyOutBytes.
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func (i *IOCopyContext) CopyOutBytes(addr hostarch.Addr, b []byte) (int, error) {
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return i.IO.CopyOut(i.Ctx, addr, b, i.Opts)
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}
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// CopyInBytes implements marshal.CopyContext.CopyInBytes.
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func (i *IOCopyContext) CopyInBytes(addr hostarch.Addr, b []byte) (int, error) {
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return i.IO.CopyIn(i.Ctx, addr, b, i.Opts)
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}
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