56 lines
1.6 KiB
C
56 lines
1.6 KiB
C
|
// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
|
||
|
|
// SPDX-License-Identifier: GPL-2.0-or-later
|
||
|
|
|
||
|
|
#pragma once
|
||
|
|
|
||
|
|
#include <mutex>
|
||
|
|
#include <boost/icl/interval_set.hpp>
|
||
|
|
|
||
|
|
namespace Common {
|
||
|
|
|
||
|
|
class FreeRegionManager {
|
||
|
|
public:
|
||
|
|
explicit FreeRegionManager() = default;
|
||
|
|
~FreeRegionManager() = default;
|
||
|
|
|
||
|
|
void SetAddressSpace(void* start, size_t size) {
|
||
|
|
this->FreeBlock(start, size);
|
||
|
|
}
|
||
|
|
|
||
|
|
std::pair<void*, size_t> FreeBlock(void* block_ptr, size_t size) {
|
||
|
|
std::scoped_lock lk(m_mutex);
|
||
|
|
|
||
|
|
// Check to see if we are adjacent to any regions.
|
||
|
|
auto start_address = reinterpret_cast<uintptr_t>(block_ptr);
|
||
|
|
auto end_address = start_address + size;
|
||
|
|
auto it = m_free_regions.find({start_address - 1, end_address + 1});
|
||
|
|
|
||
|
|
// If we are, join with them, ensuring we stay in bounds.
|
||
|
|
if (it != m_free_regions.end()) {
|
||
|
|
start_address = std::min(start_address, it->lower());
|
||
|
|
end_address = std::max(end_address, it->upper());
|
||
|
|
}
|
||
|
|
|
||
|
|
// Free the relevant region.
|
||
|
|
m_free_regions.insert({start_address, end_address});
|
||
|
|
|
||
|
|
// Return the adjusted pointers.
|
||
|
|
block_ptr = reinterpret_cast<void*>(start_address);
|
||
|
|
size = end_address - start_address;
|
||
|
|
return {block_ptr, size};
|
||
|
|
}
|
||
|
|
|
||
|
|
void AllocateBlock(void* block_ptr, size_t size) {
|
||
|
|
std::scoped_lock lk(m_mutex);
|
||
|
|
|
||
|
|
auto address = reinterpret_cast<uintptr_t>(block_ptr);
|
||
|
|
m_free_regions.subtract({address, address + size});
|
||
|
|
}
|
||
|
|
|
||
|
|
private:
|
||
|
|
std::mutex m_mutex;
|
||
|
|
boost::icl::interval_set<uintptr_t> m_free_regions;
|
||
|
|
};
|
||
|
|
|
||
|
|
} // namespace Common
|