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https://github.com/Atmosphere-NX/Atmosphere.git
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96f95b9f95
* result: try out some experimental shenanigans * result: sketch out some more shenanigans * result: see what it looks like to convert kernel to use result conds instead of guards * make rest of kernel use experimental new macro-ing
68 lines
2.7 KiB
C++
68 lines
2.7 KiB
C++
/*
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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 <mesosphere.hpp>
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namespace ams::kern {
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Result KSessionRequest::SessionMappings::PushMap(KProcessAddress client, KProcessAddress server, size_t size, KMemoryState state, size_t index) {
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/* At most 15 buffers of each type (4-bit descriptor counts). */
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MESOSPHERE_ASSERT(index < ((1ul << 4) - 1) * 3);
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/* Get the mapping. */
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Mapping *mapping;
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if (index < NumStaticMappings) {
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mapping = std::addressof(m_static_mappings[index]);
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} else {
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/* Allocate a page for the extra mappings. */
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if (m_mappings == nullptr) {
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KPageBuffer *page_buffer = KPageBuffer::Allocate();
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R_UNLESS(page_buffer != nullptr, svc::ResultOutOfMemory());
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m_mappings = reinterpret_cast<Mapping *>(page_buffer);
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}
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mapping = std::addressof(m_mappings[index - NumStaticMappings]);
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}
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/* Set the mapping. */
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mapping->Set(client, server, size, state);
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R_SUCCEED();
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}
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Result KSessionRequest::SessionMappings::PushSend(KProcessAddress client, KProcessAddress server, size_t size, KMemoryState state) {
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MESOSPHERE_ASSERT(m_num_recv == 0);
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MESOSPHERE_ASSERT(m_num_exch == 0);
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R_RETURN(this->PushMap(client, server, size, state, m_num_send++));
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}
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Result KSessionRequest::SessionMappings::PushReceive(KProcessAddress client, KProcessAddress server, size_t size, KMemoryState state) {
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MESOSPHERE_ASSERT(m_num_exch == 0);
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R_RETURN(this->PushMap(client, server, size, state, m_num_send + m_num_recv++));
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}
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Result KSessionRequest::SessionMappings::PushExchange(KProcessAddress client, KProcessAddress server, size_t size, KMemoryState state) {
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R_RETURN(this->PushMap(client, server, size, state, m_num_send + m_num_recv + m_num_exch++));
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}
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void KSessionRequest::SessionMappings::Finalize() {
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if (m_mappings) {
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KPageBuffer::Free(reinterpret_cast<KPageBuffer *>(m_mappings));
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m_mappings = nullptr;
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}
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}
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}
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