mirror of
https://github.com/Atmosphere-NX/Atmosphere
synced 2024-09-20 07:08:59 +00:00
70 lines
2.1 KiB
C++
70 lines
2.1 KiB
C++
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/*
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* Copyright (c) Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <haze.hpp>
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namespace haze {
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namespace {
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/* Allow 20MiB for use by libnx. */
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static constexpr size_t LibnxReservedMemorySize = 20_MB;
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}
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void PtpObjectHeap::Initialize() {
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/* If we're already initialized, skip re-initialization. */
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if (m_heap_block_size != 0) {
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return;
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}
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/* Estimate how much memory we can reserve. */
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size_t mem_used = 0;
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HAZE_R_ABORT_UNLESS(svcGetInfo(std::addressof(mem_used), InfoType_UsedMemorySize, svc::CurrentProcess, 0));
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HAZE_ASSERT(mem_used > LibnxReservedMemorySize);
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mem_used -= LibnxReservedMemorySize;
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/* Calculate size of blocks. */
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m_heap_block_size = mem_used / NumHeapBlocks;
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HAZE_ASSERT(m_heap_block_size > 0);
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/* Allocate the memory. */
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for (size_t i = 0; i < NumHeapBlocks; i++) {
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m_heap_blocks[i] = std::malloc(m_heap_block_size);
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HAZE_ASSERT(m_heap_blocks[i] != nullptr);
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}
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/* Set the address to allocate from. */
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m_next_address = m_heap_blocks[0];
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}
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void PtpObjectHeap::Finalize() {
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if (m_heap_block_size == 0) {
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return;
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}
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/* Tear down the heap, allowing a subsequent call to Initialize() if desired. */
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for (size_t i = 0; i < NumHeapBlocks; i++) {
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std::free(m_heap_blocks[i]);
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m_heap_blocks[i] = nullptr;
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}
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m_next_address = nullptr;
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m_heap_block_size = 0;
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m_current_heap_block = 0;
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}
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}
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