Atmosphere/libraries/libmesosphere/source/kern_k_thread_local_page.cpp
2020-01-30 16:51:35 -08:00

74 lines
2.3 KiB
C++

/*
* Copyright (c) 2018-2020 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/>.
*/
#include <mesosphere.hpp>
namespace ams::kern {
Result KThreadLocalPage::Initialize(KProcess *process) {
MESOSPHERE_ASSERT_THIS();
/* Set that this process owns us. */
this->owner = process;
/* Allocate a new page. */
KPageBuffer *page_buf = KPageBuffer::Allocate();
R_UNLESS(page_buf != nullptr, svc::ResultOutOfMemory());
auto page_buf_guard = SCOPE_GUARD { KPageBuffer::Free(page_buf); };
/* Map the address in. */
/* TODO: R_TRY(this->owner->GetPageTable().Map(...)); */
/* We succeeded. */
page_buf_guard.Cancel();
return ResultSuccess();
}
Result KThreadLocalPage::Finalize() {
MESOSPHERE_ASSERT_THIS();
/* Get the physical address of the page. */
KPhysicalAddress phys_addr = Null<KPhysicalAddress>;
/* TODO: MESOSPHERE_ABORT_UNLESS(this->owner->GetPageTable().GetPhysicalAddress(&phys_addr, this->GetAddress())); */
/* Unmap the page. */
/* TODO: R_TRY(this->owner->GetPageTable().Unmap(...); */
/* Free the page. */
KPageBuffer::Free(KPageBuffer::FromPhysicalAddress(phys_addr));
return ResultSuccess();
}
KProcessAddress KThreadLocalPage::Reserve() {
MESOSPHERE_ASSERT_THIS();
for (size_t i = 0; i < util::size(this->is_region_free); i++) {
if (this->is_region_free[i]) {
this->is_region_free[i] = false;
return this->GetRegionAddress(i);
}
}
return Null<KProcessAddress>;
}
void KThreadLocalPage::Release(KProcessAddress addr) {
MESOSPHERE_ASSERT_THIS();
this->is_region_free[this->GetRegionIndex(addr)] = true;
}
}