120 lines
3.1 KiB
C++
120 lines
3.1 KiB
C++
#include "RuntimeModuleManager.h"
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#include <GLFW/glfw3.h>
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#define _BSD_SOURCE // usleep()
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#include <stdio.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <dlfcn.h>
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#include "RuntimeModule.h"
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#include <iostream>
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#include "Globals.h"
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void RuntimeModuleManager::RegisterModule(const char* name) {
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RuntimeModule* module = new RuntimeModule();
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module->name = name;
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mModules.push_back(module);
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}
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void RuntimeModuleManager::LoadModule(RuntimeModule* module) {
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struct stat attr;
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bool stat_result = stat(module->name.c_str(), &attr);
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if (glfwGetKey(gWindow, GLFW_KEY_F11) == GLFW_PRESS) {
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std::cerr << "Module " << module->name << " id = " << module->id
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<< " mtime " << ctime((time_t *) &module->mtime) << std::endl;
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}
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if ( stat_result == 0 &&
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(module->id != attr.st_ino || module->mtime != attr.st_mtime)
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) {
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std::cout << "Opening module " << module->name << std::endl;
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void *handle = dlopen(module->name.c_str(), RTLD_NOW | RTLD_GLOBAL);
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if (handle) {
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module->handle = handle;
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module->id = attr.st_ino;
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module->mtime = attr.st_mtime;
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const struct module_api *api = (module_api*) dlsym(module->handle, "MODULE_API");
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if (api != NULL) {
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module->api = *api;
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if (module->state == NULL) {
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std::cout << "Initializing module " << module->name << std::endl;
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module->state = module->api.init();
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}
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std::cout << "Reloading module " << module->name << std::endl;
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module->api.reload(module->state);
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} else {
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std::cerr << "Error: could not find API for module " << module->name << std::endl;
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dlclose(module->handle);
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module->handle = NULL;
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module->id = 0;
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}
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} else {
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std::cerr << "Error: could not load module " << module->name << std::endl;
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std::cerr << dlerror() << std::endl;
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module->handle = NULL;
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module->id = 0;
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abort();
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}
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}
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}
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void RuntimeModuleManager::Update(float dt) {
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if (CheckModulesChanged()) {
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std::cout << "Detected module update. Unloading all modules." << std::endl;
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for (int i = 0; i < mModules.size(); i++) {
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if (mModules[i]->handle) {
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std::cerr << "Unloading module " << mModules[i]->name << std::endl;
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mModules[i]->api.unload(mModules[i]->state);
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dlclose(mModules[i]->handle);
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mModules[i]->handle = 0;
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mModules[i]->id = 0;
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}
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}
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// We need to sleep to make sure we load the new files
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usleep(350000);
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}
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for (int i = 0; i < mModules.size(); i++) {
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LoadModule(mModules[i]);
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if (mModules[i]->handle) {
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mModules[i]->api.step(mModules[i]->state);
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}
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}
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}
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bool RuntimeModuleManager::CheckModulesChanged() {
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struct stat attr;
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for (int i = 0; i < mModules.size(); i++) {
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RuntimeModule* module = mModules[i];
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bool stat_result = stat(module->name.c_str(), &attr);
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if ( stat_result == 0 &&
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(module->id != attr.st_ino || module->mtime != attr.st_mtime)
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) {
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return true;
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}
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}
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return false;
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}
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void RuntimeModuleManager::UnloadModules() {
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for (int i = 0; i < mModules.size(); i++) {
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if (mModules[i]->handle) {
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mModules[i]->api.finalize(mModules[i]->state);
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mModules[i]->state = nullptr;
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dlclose(mModules[i]->handle);
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mModules[i]->handle = 0;
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mModules[i]->id = 0;
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delete mModules[i];
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}
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}
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}
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