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#include <kapi/devices/bus.hpp>
#include <kapi/devices.hpp>
#include <kapi/devices/driver_registry.hpp>
#include <kapi/system.hpp>
#include <kstd/memory.hpp>
#include <kstd/print.hpp>
#include <kstd/string.hpp>
#include <kstd/vector.hpp>
#include <algorithm>
#include <span>
#include <utility>
namespace kapi::devices
{
bus::bus(kstd::string const & name)
: device{name}
{}
auto bus::init() -> bool
{
if (m_init_was_called.test_and_set())
{
kstd::println(kstd::print_sink::stderr, "[OS:DEV] Bus {} already initialized", name());
return true;
}
if (!enumerate())
{
kstd::println(kstd::print_sink::stderr, "[OS:DEV] Bus {} enumeration failed", name());
return false;
}
auto child_status = std::ranges::fold_left(m_devices, true, [&](bool acc, auto & child) -> bool {
kstd::println("[OS:DEV] Initializing child device {}@{}", child->name(), name());
return child->init() && acc;
});
m_initialized.test_and_set();
return child_status;
}
auto bus::add_child(kstd::shared_ptr<device> child) -> void
{
child->set_parent(kstd::static_pointer_cast<bus>(shared_from_this()));
if (!kapi::devices::register_device(child))
{
kapi::system::panic("[OS:DEV] Failed to register child device {}", child->name());
}
auto & attached = m_devices.emplace_back(std::move(child));
attached->set_state(state::present);
driver_registry::get().device_attached(attached);
if (m_initialized.test())
{
kstd::println("[OS:DEV] Initializing child device {}@{}", attached->name(), name());
if (!attached->init())
{
kapi::system::panic("[OS:DEV] Failed to initialize child device");
}
}
}
[[nodiscard]] auto bus::children() const -> std::span<kstd::shared_ptr<device> const>
{
return {m_devices.data(), m_devices.size()};
}
auto bus::protocol() -> struct bus_protocol *
{
return nullptr;
}
auto bus::enumerate() -> bool
{
return true;
}
} // namespace kapi::devices
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