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Process.cpp
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Process.cpp
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#include <kernel/Types.hpp>
#include <kernel/Process.hpp>
#include <kernel/Kernel.hpp>
#include <kernel/filesystem.hpp>
#include <kernel/mmap/Image.hpp>
#include <iostream>
const string Process::lua_entry_point = "main.lua";
Process::Process(Memory &memory, Path &executable):
initialized(false), ok(true), running(true), error(""),
memory(memory), executable(executable) {
// TODO: ideia: system rom com spritesheets acessíveis de todos os processos
// TODO: alocar memória para assets de cada processo
//memory.allocate(PROCESS_INFO_LENGTH, "Process Information");
//layout.spritesheet = kernel_api_memmap(assets.resolve("/sheet.png").getPath());
// Pontos de entrada no sistema de arquivos para código
// e dados do app
Path lua = executable.resolve(lua_entry_point);
st = luaL_newstate();
// Carrega libs padrão lua
luaL_openlibs(st);
cout << "Loading lua entrypoint " << lua.get_path() << " ..." << endl;
// Carrega o código do app
if (luaL_loadfile(st, (const char*)lua.get_path().c_str())) {
error = string(lua_tostring(st, -1));
cout << "\t" << error << endl;
ok = false;
}
else if (lua_pcall(st, 0, LUA_MULTRET, 0)) {
error = string(lua_tostring(st, -1));
cout << "\t" << error << endl;
ok = false;
}
// TODO: lua-side
//this->environment["pid"] = to_string(pid);
//this->environment["parent.pid"] = to_string(parent);
//this->environment["name"] = executable.getName();
//this->environment["addr"] = to_string(((uint8_t*)&layout)-memory.raw);
}
Process::~Process() {
lua_close(st);
// TODO
//memory.deallocate(layout.spritesheet);
//memory.deallocate((uint8_t*)&layout);
}
void Process::init() {
if (!initialized && ok) {
lua_getglobal(st, "init");
if (lua_isfunction(st, -1)) {
if (call_with_traceback(st, 0, 0) != 0) {
cout << "system error: init(): " << lua_tostring(st, -1) << endl;
ok = false;
}
}
initialized = true;
}
}
void Process::update(float dt) {
if (!ok) {
return;
}
lua_getglobal(st, "update");
if (lua_isfunction(st, -1)) {
lua_pushnumber(st, dt);
if (call_with_traceback(st, 1, 0) != 0) {
cout << "system error: update(): " << lua_tostring(st, -1) << endl;
ok = false;
}
}
}
void Process::menu() {
if (!ok) {
return;
}
lua_getglobal(st, "menu");
if (lua_isfunction(st, -1)) {
if (call_with_traceback(st, 0, 0) != 0) {
cout << "system error: menu(): " << lua_tostring(st, -1) << endl;
ok = false;
}
}
}
void Process::audio_tick() {
if (!ok) {
return;
}
lua_getglobal(st, "audio_tick");
if (lua_isfunction(st, -1)) {
if (call_with_traceback(st, 0, 0) != 0) {
cout << "system error: audio_tick(): " << lua_tostring(st, -1) << endl;
ok = false;
}
}
}
int Process::call_with_traceback(lua_State* l, int args, int rets) {
int handler_position = lua_gettop(l)-args;
int status;
lua_pushcfunction(l, [](lua_State* l) -> int {
luaL_traceback(l, l, lua_tostring(l, -1), 1);
return 1;
});
lua_insert(l, handler_position);
status = lua_pcall(l, args, rets, handler_position);
lua_remove(l, handler_position);
return status;
}