meta-agl - meta-agl layer (core AGL)

Age	Commit message (Expand)	Author	Files	Lines
2019-03-15	AGL Layer Overview: Re-write of the README-AGL.md file	Scott Rifenbark	1	-23/+26
2018-08-01	Remove porter reference from meta-agl	Ronan Le Martret	1	-408/+3
2018-01-23	Change image type to wic.vmdk	Changhyeok Bae	1	-2/+2
2017-02-16	README-AGL: correct rootfstype to ext4	Martin Kelly	1	-1/+1
2016-11-21	README-AGL.md: remove the description about v4l2sink.	Harunobu Kurokawa	1	-41/+0
2016-11-14	README-AGL.md: Update links to AGL wiki	Leon Anavi	1	-1/+6
2016-08-05	Rewrite and restructure readme files	Jan-Simon Moeller	1	-0/+472

/* * Copyright (C) 2015, 2016 "IoT.bzh" * Author "Romain Forlot" <romain.forlot@iot.bzh> * Author "Loic Collignon" <loic.collignon@iot.bzh> * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include "low-can-binding.hpp" #include <queue> #include <mutex> #include <vector> #include <thread> #include <fcntl.h> #include <linux/can.h> #include <json-c/json.h> #include <systemd/sd-event.h> #include "timer.hpp" #include "signals.hpp" #include "can-bus.hpp" #include "openxc.pb.h" #include "can-signals.hpp" #include "can-message.hpp" #include "openxc-utils.hpp" extern "C" { #include <afb/afb-service-itf.h> }; /* * Interface between the daemon and the binding */ const struct afb_binding_interface *binder_interface; can_bus_t *can_bus_handler; /******************************************************************************** * * Subscription and unsubscription * *********************************************************************************/ static int make_subscription_unsubscription(struct afb_req request, const std::string& sig_name, std::map<std::string, struct afb_event>& s, bool subscribe) { /* Make the subscription or unsubscription to the event */ if (((subscribe ? afb_req_subscribe : afb_req_unsubscribe)(request, s[sig_name.c_str()])) < 0) { ERROR(binder_interface, "Operation goes wrong for signal: %s", sig_name); return 0; } return 1; } static int create_event_handle(const std::string& sig_name, std::map<std::string, struct afb_event>& s) { s[sig_name] = afb_daemon_make_event(binder_interface->daemon, sig_name.c_str()); if (!afb_event_is_valid(s[sig_name])) { ERROR(binder_interface, "Can't create an event, something goes wrong."); return 0; } return 1; } static int subscribe_unsubscribe_signal(struct afb_req request, bool subscribe, const std::string& sig) { int ret; std::lock_guard<std::mutex> subscribed_signals_lock(get_subscribed_signals_mutex()); std::map<std::string, struct afb_event>& s = get_subscribed_signals(); if (s.find(sig) != s.end() && !afb_event_is_valid(s[std::string(sig)])) { if(!subscribe) { NOTICE(binder_interface, "Event isn't valid, it can't be unsubscribed."); ret = -1; } else /* Event it isn't valid annymore, recreate it */ ret = create_event_handle(sig, s); } else { /* Event don't exist , so let's create it */ struct afb_event empty_event = {nullptr, nullptr}; subscribed_signals[sig] = empty_event; ret = create_event_handle(sig, s); } /* Check whether or not the event handler has been correctly created and * make the subscription/unsubscription operation is so. */ if (ret <= 0) return ret; return make_subscription_unsubscription(request, sig, s, subscribe); } /** * @fn static int subscribe_unsubscribe_signals(struct afb_req request, bool subscribe, const std::vector<CanSignal>& signals) * @brief subscribe to all signals in the vector signals * * @param[in] afb_req request : contain original request use to subscribe or unsubscribe * @param[in] subscribe boolean value used to chose between a subscription operation or an unsubscription * @param[in] CanSignal vector with CanSignal to subscribe * * @return Number of correctly subscribed signal */ static int subscribe_unsubscribe_signals(struct afb_req request, bool subscribe, std::vector<std::string>& signals) { int rets = 0; for(auto& signal_i : signals) { int ret = subscribe_unsubscribe_signal(request, subscribe, signal_i); if(ret <= 0) return ret; rets++; DEBUG(binder_interface, "Signal: %s subscribed", signal_i.c_str()); } return rets; } static int subscribe_unsubscribe_name(struct afb_req request, bool subscribe, const char *name) { std::vector<std::string> sig; int ret = 0; openxc_DynamicField search_key = build_DynamicField(std::string(name)); sig = find_signals(search_key); if (sig.empty()) ret = 0; ret = subscribe_unsubscribe_signals(request, subscribe, sig); NOTICE(binder_interface, "Subscribed correctly to %d/%d signal(s).", ret, (int)sig.size()); return ret; } static void subscribe_unsubscribe(struct afb_req request, bool subscribe) { int ok, i, n; struct json_object *args, *a, *x; /* makes the subscription/unsubscription */ args = afb_req_json(request); if (args == NULL || !json_object_object_get_ex(args, "event", &a)) { ok = subscribe_unsubscribe_name(request, subscribe, "*"); } else if (json_object_get_type(a) != json_type_array) { ok = subscribe_unsubscribe_name(request, subscribe, json_object_get_string(a)); } else { n = json_object_array_length(a); ok = 0; for (i = 0 ; i < n ; i++) { x = json_object_array_get_idx(a, i); if (subscribe_unsubscribe_name(request, subscribe, json_object_get_string(x))) ok++; } ok = (ok == n); } /* send the report */ if (ok) afb_req_success(request, NULL, NULL); else afb_req_fail(request, "error", NULL); } extern "C" { static void subscribe(struct afb_req request) { subscribe_unsubscribe(request, true); } static void unsubscribe(struct afb_req request) { subscribe_unsubscribe(request, false); } static const struct afb_verb_desc_v1 verbs[]= { { .name= "subscribe", .session= AFB_SESSION_NONE, .callback= subscribe, .info= "subscribe to notification of CAN bus messages." }, { .name= "unsubscribe", .session= AFB_SESSION_NONE, .callback= unsubscribe, .info= "unsubscribe a previous subscription." } }; static const struct afb_binding binding_desc { AFB_BINDING_VERSION_1, { "Low level CAN bus service", "low-can", verbs } }; const struct afb_binding *afbBindingV1Register (const struct afb_binding_interface *itf) { binder_interface = itf; return &binding_desc; } /** * @brief Initialize the binding. * * @param[in] service Structure which represent the Application Framework Binder. * * @return Exit code, zero if success. */ int afbBindingV1ServiceInit(struct afb_service service) { int fd_conf; fd_conf = afb_daemon_rootdir_open_locale(binder_interface->daemon, "can_buses.json", O_RDONLY, NULL); /* Initialize the CAN bus handler */ can_bus_handler = new can_bus_t(fd_conf); /* Open CAN socket */ if(can_bus_handler->init_can_dev() == 0) { can_bus_handler->start_threads(); return 0; } ERROR(binder_interface, "There was something wrong with CAN device Initialization. Check your config file maybe"); return 1; } };