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https://github.com/Atmosphere-NX/Atmosphere-libs.git
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00203fd7c3
* 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
107 lines
3.5 KiB
C++
107 lines
3.5 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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namespace {
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constinit KLightLock g_object_list_lock;
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constinit KObjectName::List g_object_list;
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}
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void KObjectName::Initialize(KAutoObject *obj, const char *name) {
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/* Set member variables. */
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m_object = obj;
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std::strncpy(m_name, name, sizeof(m_name));
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m_name[sizeof(m_name) - 1] = '\x00';
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/* Open a reference to the object we hold. */
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m_object->Open();
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}
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bool KObjectName::MatchesName(const char *name) const {
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return std::strncmp(m_name, name, sizeof(m_name)) == 0;
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}
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Result KObjectName::NewFromName(KAutoObject *obj, const char *name) {
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/* Create a new object name. */
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KObjectName *new_name = KObjectName::Allocate();
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R_UNLESS(new_name != nullptr, svc::ResultOutOfResource());
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/* Initialize the new name. */
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new_name->Initialize(obj, name);
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/* Check if there's an existing name. */
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{
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/* Ensure we have exclusive access to the global list. */
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KScopedLightLock lk(g_object_list_lock);
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/* If the object doesn't exist, put it into the list. */
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KScopedAutoObject existing_object = FindImpl(name);
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if (existing_object.IsNull()) {
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g_object_list.push_back(*new_name);
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R_SUCCEED();
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}
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}
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/* The object already exists, which is an error condition. Perform cleanup. */
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obj->Close();
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KObjectName::Free(new_name);
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R_THROW(svc::ResultInvalidState());
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}
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Result KObjectName::Delete(KAutoObject *obj, const char *compare_name) {
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/* Ensure we have exclusive access to the global list. */
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KScopedLightLock lk(g_object_list_lock);
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/* Find a matching entry in the list, and delete it. */
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for (auto &name : g_object_list) {
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if (name.MatchesName(compare_name) && obj == name.GetObject()) {
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/* We found a match, clean up its resources. */
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obj->Close();
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g_object_list.erase(g_object_list.iterator_to(name));
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KObjectName::Free(std::addressof(name));
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R_SUCCEED();
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}
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}
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/* We didn't find the object in the list. */
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R_THROW(svc::ResultNotFound());
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}
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KScopedAutoObject<KAutoObject> KObjectName::Find(const char *name) {
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/* Ensure we have exclusive access to the global list. */
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KScopedLightLock lk(g_object_list_lock);
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return FindImpl(name);
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}
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KScopedAutoObject<KAutoObject> KObjectName::FindImpl(const char *compare_name) {
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/* Try to find a matching object in the global list. */
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for (const auto &name : g_object_list) {
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if (name.MatchesName(compare_name)) {
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return name.GetObject();
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}
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}
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/* There's no matching entry in the list. */
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return nullptr;
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}
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}
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