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65 lines
1.5 KiB
65 lines
1.5 KiB
// Copyright 2018 The Android Open Source Project
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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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#include "auto_goldfish_dma_context.h"
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namespace {
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goldfish_dma_context empty() {
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goldfish_dma_context ctx;
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ctx.mapped_addr = 0;
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ctx.size = 0;
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ctx.fd = -1;
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return ctx;
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}
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void destroy(goldfish_dma_context *ctx) {
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if (ctx->mapped_addr) {
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goldfish_dma_unmap(ctx);
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}
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if (ctx->fd > 0) {
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goldfish_dma_free(ctx);
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}
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}
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} // namespace
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AutoGoldfishDmaContext::AutoGoldfishDmaContext() : m_ctx(empty()) {}
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AutoGoldfishDmaContext::AutoGoldfishDmaContext(goldfish_dma_context *ctx)
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: m_ctx(*ctx) {
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*ctx = empty();
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}
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AutoGoldfishDmaContext::~AutoGoldfishDmaContext() {
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destroy(&m_ctx);
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}
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void AutoGoldfishDmaContext::reset(goldfish_dma_context *ctx) {
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destroy(&m_ctx);
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if (ctx) {
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m_ctx = *ctx;
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*ctx = empty();
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} else {
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m_ctx = empty();
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}
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}
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goldfish_dma_context AutoGoldfishDmaContext::release() {
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goldfish_dma_context copy = m_ctx;
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m_ctx = empty();
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return copy;
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}
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