/*
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* Copyright (C) 2018 Google, Inc.
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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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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