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fs: revise NcaFileSystemDriver for latest semantics

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Michael Scire 2021-12-13 22:42:32 -08:00 • committed by SciresM
parent ccf29a1302
commit 52296fc2dd
37 changed files with 1612 additions and 1026 deletions
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56
libraries/libstratosphere/include/stratosphere/fssystem/fssystem_asynchronous_access.hpp Normal file
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/*
* Copyright (c) Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <vapours.hpp>
namespace ams::fssystem {
class IAsynchronousAccessSplitter {
public:
static IAsynchronousAccessSplitter *GetDefaultAsynchronousAccessSplitter();
public:
constexpr IAsynchronousAccessSplitter() = default;
constexpr virtual ~IAsynchronousAccessSplitter() { /* ... */ }
public:
Result QueryNextOffset(s64 *out, s64 start_offset, s64 end_offset, s64 access_size, s64 alignment_size);
public:
virtual Result QueryAppropriateOffset(s64 *out, s64 offset, s64 access_size, s64 alignment_size) = 0;
virtual Result QueryInvocationCount(s64 *out, s64 start_offset, s64 end_offset, s64 access_size, s64 alignment_size);
};
class DefaultAsynchronousAccessSplitter final : public IAsynchronousAccessSplitter {
public:
constexpr DefaultAsynchronousAccessSplitter() = default;
public:
virtual Result QueryAppropriateOffset(s64 *out, s64 offset, s64 access_size, s64 alignment_size) override {
/* Align the access. */
*out = util::AlignDown(offset + access_size, alignment_size);
return ResultSuccess();
}
virtual Result QueryInvocationCount(s64 *out, s64 start_offset, s64 end_offset, s64 access_size, s64 alignment_size) override {
/* Determine aligned access count. */
*out = util::DivideUp(end_offset - util::AlignDown(start_offset, alignment_size), access_size);
return ResultSuccess();
}
};
inline IAsynchronousAccessSplitter *IAsynchronousAccessSplitter::GetDefaultAsynchronousAccessSplitter() {
static constinit DefaultAsynchronousAccessSplitter s_default_access_splitter;
return std::addressof(s_default_access_splitter);
}
}