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#include <kapi/devices.hpp>
#include <kernel/devices/root_bus.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 <optional>
#include <string_view>
#include <utility>
namespace kapi::devices
{
namespace
{
auto constinit root_bus = std::optional<kernel::devices::root_bus>{};
auto constinit device_tree = kstd::flat_map<kstd::string, kstd::observer_ptr<device>>{};
} // namespace
auto init() -> void
{
if (root_bus.has_value())
{
kapi::system::panic("[OS:DEV] The device subsystem has already been initialized");
}
interface_registry::init();
auto & bus = root_bus.emplace();
register_device(bus);
bus.init();
}
auto get_root_bus() -> bus &
{
if (!root_bus.has_value())
{
kapi::system::panic("[OS:DEV] Root bus not initialized!");
}
return *root_bus;
}
auto register_device(device & device) -> bool
{
kstd::println("[OS:DEV] Registering device {}", device.name());
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::observer_ptr<device>
{
for (auto const & [key, value] : device_tree)
{
if (value->name() == name)
{
return value;
}
}
return nullptr;
}
} // namespace kapi::devices
namespace kapi::test_support::devices
{
auto deinit() -> void
{
deinit_interface_registry();
kapi::devices::root_bus.reset();
}
} // namespace kapi::test_support::devices
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