/** Loadable / plugin support. * * @author Steffen Vogel * @copyright 2017, Institute for Automation of Complex Power Systems, EONERC *********************************************************************************/ #include #include "plugin.h" /** Global list of all known plugins */ struct list plugins = LIST_INIT(); int plugin_init(struct plugin *p, char *name, char *path) { p->name = strdup(name); p->path = strdup(path); p->state = STATE_INITIALIZED; return 0; } int plugin_load(struct plugin *p) { p->handle = dlopen(p->path, RTLD_NOW); if (!p->path) return -1; p->state = STATE_LOADED; return 0; } int plugin_unload(struct plugin *p) { int ret; assert(p->state == STATE_LOADED); ret = dlclose(p->handle); if (ret) return -1; p->state = STATE_UNLOADED; return 0; } int plugin_destroy(struct plugin *p) { assert(p->state != STATE_DESTROYED && p->state != STATE_LOADED); if (p->path) free(p->path); return 0; } int plugin_parse(struct plugin *p, config_setting_t *cfg) { const char *path; path = config_setting_get_string(cfg); if (!path) cerror(cfg, "Setting 'plugin' must be a string."); return 0; } struct plugin * plugin_lookup(enum plugin_type type, const char *name) { list_foreach(struct plugin *l, &plugins) { if (l->type == type && strcmp(l->name, name) == 0) return l; } return NULL; } void plugin_dump(enum plugin_type type) { list_foreach(struct plugin *p, &plugins) { if (p->type == type) printf(" - %-12s: %s\n", p->name, p->description); } }