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#include <kapi/interrupts.hpp>
#include <kstd/flat_map.hpp>
#include <kstd/memory.hpp>
#include <kstd/print.hpp>
#include <kstd/vector.hpp>
#include <algorithm>
#include <cstdint>
#include <utility>
namespace kapi::interrupts
{
namespace
{
auto constinit handlers = kstd::flat_map<std::uint32_t, kstd::vector<std::pair<handler *, kstd::weak_ptr<void>>>>{};
} // namespace
auto register_handler(std::uint32_t irq_number, handler & handler, kstd::weak_ptr<void> context) -> void
{
if (handlers.contains(irq_number))
{
auto & handler_list = handlers.at(irq_number);
handler_list.push_back(std::pair{&handler, context});
}
else
{
handlers.emplace(irq_number, kstd::vector{
std::pair{&handler, context}
});
}
}
auto unregister_handler(std::uint32_t irq_number, handler & handler) -> void
{
auto & handler_list = handlers.at(irq_number);
auto [first, last] =
std::ranges::remove_if(handler_list, [&](auto const & entry) { return entry.first == &handler; });
handler_list.erase(first, last);
}
auto dispatch(std::uint32_t irq_number) -> status
{
if (!handlers.contains(irq_number))
{
kstd::println(kstd::print_sink::stderr, "[OS:interrupts] No handler for IRQ{}", irq_number);
return status::unhandled;
}
auto & handler_list = handlers.at(irq_number);
if (handler_list.empty())
{
kstd::println(kstd::print_sink::stderr, "[OS:interrupts] No handler for IRQ{}", irq_number);
return status::unhandled;
}
for (auto const & [handler, context] : handler_list)
{
if (handler && handler->handle_interrupt(irq_number, context) == status::handled)
{
return status::handled;
}
}
return status::unhandled;
}
} // namespace kapi::interrupts
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