250 lines
7.6 KiB
C
250 lines
7.6 KiB
C
#include "module_manager_interna.h"
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#include "stellar/module_manager.h"
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#include "stellar/utils.h"
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#include <dlfcn.h>
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#include <stdbool.h>
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#include <assert.h>
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#include <string.h>
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/*******************************************
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* module manager internal API *
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*******************************************/
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#include "toml/toml.h"
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int module_specs_load(FILE *fp, struct module_spec_load **mod_spec)
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{
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if(fp==NULL|| mod_spec==NULL) return 0;
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int mod_num = 0;
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toml_table_t *conf = toml_parse_file(fp, NULL, 0);
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toml_array_t* mod_array = toml_array_in(conf, "module");
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if(mod_array==NULL)goto MODULE_SPEC_LOAD_ERROR;
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mod_num = toml_array_nelem(mod_array);
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*mod_spec = CALLOC(struct module_spec_load, mod_num);
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struct stellar_module_manager *mod_mgr = (struct stellar_module_manager *)container_of(mod_spec, struct stellar_module_manager, module_specs);
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// TODO: store module specific in hash
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for (int i = 0; i < mod_num; i++) {
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toml_table_t* toml_mod = toml_table_at(mod_array, i);
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const char *path_raw = toml_raw_in(toml_mod, "path");
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const char *init_func_name_raw = toml_raw_in(toml_mod, "init");
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const char *exit_func_name_raw = toml_raw_in(toml_mod, "exit");
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char *path = NULL;
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char *init_func_name = NULL;
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char *exit_func_name = NULL;
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if (toml_rtos(path_raw, &path) || toml_rtos(init_func_name_raw, &init_func_name) ||
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toml_rtos(exit_func_name_raw, &exit_func_name))
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{
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goto MODULE_SPEC_LOAD_ERROR;
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}
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void* handle = dlopen(path, RTLD_NOW|RTLD_LAZY|RTLD_GLOBAL);
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if (!handle) {
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fprintf(stderr, "Error loading module %s: %s\n", path, dlerror());
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goto MODULE_SPEC_LOAD_ERROR;
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}
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mod_spec[i]->on_init_cb = (module_on_init_func *) dlsym(handle, init_func_name);
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if (mod_spec[i]->on_init_cb)
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{
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mod_mgr->module_specs[i].mod = mod_mgr->module_specs[i].on_init_cb(mod_mgr);
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if (stellar_module_manager_get_module(mod_mgr, mod_mgr->module_specs[i].mod->name) == NULL)
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{
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mod_mgr->module_specs[i].is_init_succ = true;
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}
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else
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{
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fprintf(stderr, "Module %s already exists\n", mod_mgr->module_specs[i].mod->name);
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if (mod_mgr->module_specs[i].on_exit_cb)
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mod_mgr->module_specs[i].on_exit_cb(mod_mgr, mod_mgr->module_specs[i].mod);
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assert(0);
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}
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}
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else
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{
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fprintf(stderr, "Could not load init function %s: %s\n", init_func_name, dlerror());
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}
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mod_spec[i]->on_exit_cb = (module_on_exit_func *) dlsym(handle, exit_func_name);
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if (!mod_spec[i]->on_exit_cb) {
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fprintf(stderr, "Could not load exit function %s: %s\n", exit_func_name, dlerror());
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}
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mod_spec[i]->path=path;
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mod_spec[i]->init_cb_name=init_func_name;
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mod_spec[i]->exit_cb_name=exit_func_name;
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}
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if(conf )toml_free(conf);
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return mod_num;
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MODULE_SPEC_LOAD_ERROR:
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if(conf )toml_free(conf);
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if(*mod_spec)FREE(*mod_spec);
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return 0;
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}
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#include <fcntl.h>
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#include <unistd.h>
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static int stellar_module_manager_get_filepath_from_fp(FILE *fp, char *path, size_t n)
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{
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if(fp==NULL)return -1;
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int fd = fileno(fp);
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char buf[256];
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snprintf(buf, sizeof(buf), "/proc/self/fd/%d", fd);
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return readlink(buf, path, n - 1);
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}
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struct stellar_module_manager *stellar_module_manager_new_with_file(FILE *fp, int max_thread_num, struct mq_schema *mq_schema)
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{
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struct stellar_module_manager *mod_mgr = CALLOC(struct stellar_module_manager, 1);
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mod_mgr->schema.max_thread_num=max_thread_num;
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mod_mgr->schema.mq_schema=mq_schema;
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mod_mgr->load_module_num = module_specs_load(fp, &mod_mgr->module_specs);
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char pathname[FILENAME_MAX] = {};
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if(stellar_module_manager_get_filepath_from_fp(fp, pathname, sizeof(pathname)) > 0)
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{
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mod_mgr->module_spec_toml_path = strdup(pathname);
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}
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return mod_mgr;
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}
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/*******************************************
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* stellar module manager API *
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*******************************************/
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struct stellar_module_manager *stellar_module_manager_new(const char *module_spec_toml_path, int max_thread_num, struct mq_schema *mq_schema)
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{
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FILE *fp=fopen(module_spec_toml_path, "r");
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struct stellar_module_manager *mod_mgr=stellar_module_manager_new_with_file(fp, max_thread_num, mq_schema);
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if(fp)fclose(fp);
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return mod_mgr;
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}
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void stellar_module_manager_free(struct stellar_module_manager *mod_mgr)
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{
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if(mod_mgr==NULL)return;
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if(mod_mgr->module_spec_toml_path)FREE(mod_mgr->module_spec_toml_path);
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if (mod_mgr->module_specs)
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{
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for (int i = 0; i < mod_mgr->load_module_num; i++)
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{
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if (mod_mgr->module_specs[i].on_exit_cb != NULL &&
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mod_mgr->module_specs[i].is_init_succ)
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{
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mod_mgr->module_specs[i].on_exit_cb(mod_mgr, mod_mgr->module_specs[i].mod);
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}
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if(mod_mgr->module_specs[i].path)FREE(mod_mgr->module_specs[i].path);
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if(mod_mgr->module_specs[i].init_cb_name)FREE(mod_mgr->module_specs[i].init_cb_name);
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if(mod_mgr->module_specs[i].exit_cb_name)FREE(mod_mgr->module_specs[i].exit_cb_name);
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}
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FREE(mod_mgr->module_specs);
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}
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FREE(mod_mgr);
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return;
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}
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int stellar_module_manager_get_max_thread_num(struct stellar_module_manager*mod_mgr)
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{
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if(mod_mgr==NULL)return -1;
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return mod_mgr->schema.max_thread_num;
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}
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struct mq_schema *stellar_module_manager_get_mq_schema(struct stellar_module_manager *mod_mgr)
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{
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if(mod_mgr==NULL)return NULL;
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return mod_mgr->schema.mq_schema;
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}
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const char *stellar_module_manager_get_toml_path(struct stellar_module_manager *mod_mgr)
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{
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if(mod_mgr==NULL)return NULL;
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return mod_mgr->module_spec_toml_path;
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}
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__thread int local_thread_id=-1;
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__thread struct mq_runtime *local_mq_rt=NULL;
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int stellar_module_manager_get_thread_id(struct stellar_module_manager* mod_mgr __unused)
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{
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return local_thread_id;
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}
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struct mq_runtime *stellar_module_manager_get_mq_runtime(struct stellar_module_manager *mod_mgr __unused)
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{
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return local_mq_rt;
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}
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void stellar_module_manager_register_thread(struct stellar_module_manager* mod_mgr __unused, int thread_id, struct mq_runtime *mq_rt)
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{
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local_thread_id=thread_id;
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local_mq_rt=mq_rt;
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return;
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}
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struct stellar_module *stellar_module_manager_get_module(struct stellar_module_manager *mod_mgr, const char *module_name)
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{
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if(mod_mgr==NULL || module_name == NULL)return NULL;
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if (mod_mgr->module_specs)
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{
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for(int i=0; i<mod_mgr->load_module_num; i++)
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{
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if(mod_mgr->module_specs[i].mod == NULL)break;
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if(strcmp(mod_mgr->module_specs[i].mod->name, module_name)==0 && mod_mgr->module_specs[i].is_init_succ)
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{
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return mod_mgr->module_specs[i].mod;
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}
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}
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}
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return NULL;
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}
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/*******************************************
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* stellar module API *
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*******************************************/
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struct stellar_module *stellar_module_new(const char *name, void *ctx)
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{
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struct stellar_module *mod = CALLOC(struct stellar_module, 1);
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memcpy(mod->name, name, MIN(NAME_MAX, strlen(name)));
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mod->module_ctx=ctx;
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return mod;
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}
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void stellar_module_free(struct stellar_module *mod)
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{
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if(mod==NULL)return;
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FREE(mod);
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return;
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}
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void * stellar_module_get_ctx(struct stellar_module *mod)
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{
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if(mod==NULL)return NULL;
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return mod->module_ctx;
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}
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void stellar_module_set_ctx(struct stellar_module *mod, void *ctx)
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{
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if(mod==NULL)return;
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mod->module_ctx=ctx;
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return;
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}
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const char *stellar_module_get_name(struct stellar_module* mod)
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{
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if(mod==NULL)return NULL;
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return mod->name;
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}
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void stellar_module_set_name(struct stellar_module* mod, const char *name)
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{
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if(mod==NULL)return;
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memcpy(mod->name, name, MIN(NAME_MAX, strlen(name)));
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return;
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}
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