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#include <kapi/devices.hpp>
#include <kernel/devices/root_bus.hpp>
#include <kernel/drivers/init.hpp>
#include <kapi/system.hpp>
#include <kapi/test_support/devices.hpp>
#include <kstd/flat_map.hpp>
#include <kstd/memory.hpp>
#include <kstd/print.hpp>
#include <kstd/string.hpp>
#include <kstd/vector.hpp>
#include <string_view>
#include <utility>
namespace kapi::devices
{
namespace
{
auto constinit root_bus = kstd::shared_ptr<kernel::devices::root_bus>{};
auto constinit device_tree = kstd::flat_map<kstd::string, kstd::weak_ptr<device>>{};
} // namespace
auto init() -> void
{
if (root_bus)
{
kapi::system::panic("[OS:DEV] The device subsystem has already been initialized");
}
interface_registry::init();
kernel::drivers::init();
root_bus = kstd::make_shared<kernel::devices::root_bus>();
register_device(root_bus);
}
auto get_root_bus() -> kstd::shared_ptr<bus>
{
if (!root_bus)
{
kapi::system::panic("[OS:DEV] Root bus not initialized!");
}
return root_bus;
}
auto register_device(kstd::shared_ptr<device> device) -> bool
{
if (!device)
{
return false;
}
kstd::println("[OS:DEV] Registering device {}", device->name());
auto found = device_tree.find(device->name());
if (found != device_tree.end())
{
if (!found->second.expired())
{
return false;
}
found->second = device;
return true;
}
return device_tree.emplace(device->name(), device).second;
}
auto unregister_device(device &) -> bool
{
kstd::println("[OS:DEV] TODO: implement device deregistration");
return false;
}
auto find_device(std::string_view name) -> kstd::shared_ptr<device>
{
auto found = device_tree.find(kstd::string{name});
if (found == device_tree.end())
{
return nullptr;
}
return found->second.lock();
}
auto all() -> kstd::vector<kstd::shared_ptr<device>>
{
auto result = kstd::vector<kstd::shared_ptr<device>>{};
for (auto const & [name, weak_device] : device_tree)
{
if (auto device = weak_device.lock())
{
result.push_back(std::move(device));
}
}
return result;
}
} // namespace kapi::devices
namespace kapi::test_support::devices
{
auto deinit() -> void
{
deinit_interface_registry();
deinit_driver_registry();
kapi::devices::root_bus.reset();
}
} // namespace kapi::test_support::devices
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