mirror of
https://github.com/NVIDIA/nvidia-container-toolkit
synced 2024-11-24 13:05:17 +00:00
78 lines
1.7 KiB
Go
78 lines
1.7 KiB
Go
/*
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* Copyright (c) 2021, NVIDIA CORPORATION. All rights reserved.
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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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*/
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package mmio
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import (
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"fmt"
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"github.com/NVIDIA/go-nvlib/pkg/nvpci/bytes"
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)
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type mockMmio struct {
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mmio
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source *[]byte
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offset int
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rw bool
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}
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func mockOpen(source *[]byte, offset int, size int, rw bool) (Mmio, error) {
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if size < 0 {
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size = len(*source) - offset
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}
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if (offset + size) > len(*source) {
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return nil, fmt.Errorf("offset+size out of range")
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}
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data := append([]byte{}, (*source)[offset:offset+size]...)
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m := &mockMmio{}
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m.Bytes = bytes.New(&data).LittleEndian()
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m.source = source
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m.offset = offset
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m.rw = rw
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return m, nil
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}
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// MockOpenRO open read only.
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func MockOpenRO(source *[]byte, offset int, size int) (Mmio, error) {
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return mockOpen(source, offset, size, false)
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}
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// MockOpenRW open read write.
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func MockOpenRW(source *[]byte, offset int, size int) (Mmio, error) {
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return mockOpen(source, offset, size, true)
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}
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func (m *mockMmio) Close() error {
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m.Bytes = nil
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m.source = nil
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m.offset = 0
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m.rw = false
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return nil
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}
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func (m *mockMmio) Sync() error {
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if !m.rw {
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return fmt.Errorf("opened read-only")
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}
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for i := range *m.Bytes.Raw() {
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(*m.source)[m.offset+i] = (*m.Bytes.Raw())[i]
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}
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return nil
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}
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