Atmosphere/libraries/libstratosphere/source/i2c/i2c_client_api.cpp
2020-11-14 03:37:51 -08:00

87 lines
2.4 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 <stratosphere.hpp>
namespace ams::i2c {
namespace {
constinit os::SdkMutex g_init_mutex;
constinit int g_initialize_count = 0;
constinit os::SdkMutex g_i2c_mutex;
std::shared_ptr<sf::IManager> g_i2c_manager;
constinit int g_i2c_count = 0;
constinit os::SdkMutex g_i2c_pcv_mutex;
std::shared_ptr<sf::IManager> g_i2c_pcv_manager;
constinit int g_i2c_pcv_count = 0;
}
void InitializeWith(std::shared_ptr<i2c::sf::IManager> &&sp, std::shared_ptr<i2c::sf::IManager> &&sp_pcv) {
std::scoped_lock lk(g_init_mutex);
AMS_ABORT_UNLESS(g_initialize_count == 0);
{
std::scoped_lock lk(g_i2c_mutex);
g_i2c_manager = std::move(sp);
AMS_ABORT_UNLESS(g_i2c_count == 0);
g_i2c_count = 1;
}
{
std::scoped_lock lk(g_i2c_pcv_mutex);
g_i2c_pcv_manager = std::move(sp);
AMS_ABORT_UNLESS(g_i2c_pcv_count == 0);
g_i2c_pcv_count = 1;
}
g_initialize_count = 1;
}
void InitializeEmpty() {
std::scoped_lock lk(g_init_mutex);
++g_initialize_count;
}
void Finalize() {
std::scoped_lock lk(g_init_mutex);
AMS_ASSERT(g_initialize_count > 0);
if ((--g_initialize_count) == 0) {
{
std::scoped_lock lk(g_i2c_mutex);
AMS_ASSERT(g_i2c_count > 0);
if ((--g_i2c_count) == 0) {
g_i2c_manager.reset();
}
}
{
std::scoped_lock lk(g_i2c_pcv_mutex);
AMS_ASSERT(g_i2c_pcv_count > 0);
if ((--g_i2c_pcv_count) == 0) {
g_i2c_pcv_manager.reset();
}
}
}
}
}