diff options
Diffstat (limited to 'libwindowmanager/libwindowmanager.cpp')
| -rw-r--r-- | libwindowmanager/libwindowmanager.cpp | 498 |
1 files changed, 0 insertions, 498 deletions
diff --git a/libwindowmanager/libwindowmanager.cpp b/libwindowmanager/libwindowmanager.cpp deleted file mode 100644 index c5a1062..0000000 --- a/libwindowmanager/libwindowmanager.cpp +++ /dev/null @@ -1,498 +0,0 @@ -/* - * Copyright (c) 2017 TOYOTA MOTOR CORPORATION - * - * 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 "libwindowmanager.h" - -#include <cassert> -#include <cctype> -#include <cerrno> -#include <cstdio> -#include <cstdlib> -#include <cstring> - -#include <atomic> -#include <map> -#include <mutex> -#include <set> -#include <queue> - -#include <unistd.h> - -#include <systemd/sd-event.h> - -#include <json-c/json.h> -#include <pthread.h> - -extern "C" { -#include <afb/afb-ws-client.h> -#include <afb/afb-wsj1.h> -} - -#define UNUSED(x) (void)(x) - -// _ ___ _ -// ___| | __ _ ___ ___ |_ _|_ __ ___ _ __ | | -// / __| |/ _` / __/ __| | || '_ ` _ \| '_ \| | -// | (__| | (_| \__ \__ \ | || | | | | | |_) | | -// \___|_|\__,_|___/___/ |___|_| |_| |_| .__/|_| -// |_| -class LibWindowmanager::Impl { - friend class LibWindowmanager; - - // This is the LibWindowmanager interface impl - int init(int port, char const *token); - - // WM API - int requestSurface(const char *label); - int activateSurface(const char *label); - int deactivateSurface(const char *label); - int endDraw(const char *label); - - void set_event_handler(enum EventType et, handler_fun func); - - Impl(); - ~Impl(); - - struct afb_wsj1 *wsj1; - struct sd_event *loop; - - std::set<std::string> labels; - std::map<EventType, handler_fun> handlers; - std::queue<std::pair<handler_fun, std::string>> handler_queue; - - int api_call(const char *verb, json_object *object, - const std::function<void(bool, json_object *)> &onReply); - -public: - void event(char const *et, char const *label); -private: - int runEventLoop(); -}; - -namespace { - -constexpr const int token_maxlen = 20; -constexpr const char *const wmAPI = "windowmanager"; - -#define CONCAT_(X, Y) X##Y -#define CONCAT(X, Y) CONCAT_(X, Y) - -#ifndef SCOPE_TRACING -#define TRACE() -#define TRACEN(N) -#else -#define TRACE() \ - ScopeTrace __attribute__((unused)) CONCAT(trace_scope_, __LINE__)(__func__) -#define TRACEN(N) \ - ScopeTrace __attribute__((unused)) CONCAT(named_trace_scope_, __LINE__)(#N) - -struct ScopeTrace { - thread_local static int indent; - char const *f{}; - explicit ScopeTrace(char const *func) : f(func) { - fprintf(stderr, "%*s%s -->\n", 2 * indent++, "", this->f); - } - ~ScopeTrace() { fprintf(stderr, "%*s%s <--\n", 2 * --indent, "", this->f); } -}; -thread_local int ScopeTrace::indent = 0; -#endif - -/* called when wsj1 receives a method invocation */ -void onCall(void *closure, const char *api, const char *verb, - struct afb_wsj1_msg *msg) { - TRACE(); - UNUSED(closure); - UNUSED(verb); - UNUSED(api); - UNUSED(msg); -} - -/* called when wsj1 receives an event */ -void onEvent(void *closure, const char *event, afb_wsj1_msg *msg) { - TRACE(); - - // check API name in event - if (0 != strncmp(wmAPI, event, strlen(wmAPI))) { - return; - } - - reinterpret_cast<LibWindowmanager::Impl *>(closure)->event( - event, json_object_get_string( - json_object_object_get(afb_wsj1_msg_object_j(msg), "data"))); -} - -/* called when wsj1 hangsup */ -void onHangup(void *closure, afb_wsj1 *wsj1) { - TRACE(); - UNUSED(closure); - UNUSED(wsj1); - fputs("Hangup, the WindowManager vanished\n", stderr); - exit(1); // XXX: there should be something ... *better* here. -} - -constexpr struct afb_wsj1_itf itf = { - onHangup, onCall, onEvent, -}; - -// XXX: I am not sure this is the right thing to do though... -std::recursive_mutex dispatch_mutex; - -json_object *drawing_name_json_argument(char const *label) { - json_object *j = json_object_new_object(); - json_object_object_add(j, "drawing_name", json_object_new_string(label)); - return j; -} - -} // namespace - -// _ ___ _ _ _ -// ___| | __ _ ___ ___ |_ _|_ __ ___ _ __ | | (_)_ __ ___ _ __ | | -// / __| |/ _` / __/ __| | || '_ ` _ \| '_ \| | | | '_ ` _ \| '_ \| | -// | (__| | (_| \__ \__ \ | || | | | | | |_) | | | | | | | | | |_) | | -// \___|_|\__,_|___/___/ |___|_| |_| |_| .__/|_| |_|_| |_| |_| .__/|_| -// |_| |_| -LibWindowmanager::Impl::Impl() : wsj1{}, loop{}, labels(), handlers() { TRACE(); } - -LibWindowmanager::Impl::~Impl() { - TRACE(); - afb_wsj1_unref(wsj1); - sd_event_unref(loop); -} - -int LibWindowmanager::Impl::init(int port, char const *token) { - TRACE(); - char *uribuf = nullptr; - int rc = -1; - - if (this->loop != nullptr && this->wsj1 != nullptr) { - fputs("LibWindowmanager instance is already initialized!\n", stderr); - rc = -EALREADY; - goto fail; - } - - if (token == nullptr) { - fputs("Token is invalid\n", stderr); - rc = -EINVAL; - goto fail; - } - - if (port < 1 || port > 0xffff) { - fputs("Port is invalid\n", stderr); - rc = -EINVAL; - goto fail; - } - - /* get the default event loop */ - rc = sd_event_default(&this->loop); - if (rc < 0) { - fprintf(stderr, "Connection to default event loop failed: %s\n", - strerror(-rc)); - goto fail; - } - - asprintf(&uribuf, "ws://localhost:%d/api?token=%s", port, token); - - /* connect the websocket wsj1 to the uri given by the first argument */ - this->wsj1 = afb_ws_client_connect_wsj1( - this->loop, uribuf, const_cast<struct afb_wsj1_itf *>(&itf), this); - if (this->wsj1 == nullptr) { - sd_event_unref(this->loop); - this->loop = nullptr; - fprintf(stderr, "Connection to %s failed: %m\n", uribuf); - rc = -errno; - goto fail; - } - - this->runEventLoop(); - - return 0; - -fail: - return rc; -} - -int LibWindowmanager::Impl::requestSurface(const char *label) { - TRACE(); - - if (this->labels.find(label) != this->labels.end()) { - fputs("Surface label already known!\n", stderr); - return -EINVAL; - } - - json_object *j = drawing_name_json_argument(label); - - int rc = -1; - /* send the request */ - int rc2 = - this->api_call("RequestSurface", j, [&rc](bool ok, json_object *j) { - if (ok) { - int id = - json_object_get_int(json_object_object_get(j, "response")); - char *buf; - asprintf(&buf, "%d", id); - printf("setenv(\"QT_IVI_SURFACE_ID\", %s, 1)\n", buf); - if (setenv("QT_IVI_SURFACE_ID", buf, 1) != 0) { - fprintf(stderr, "putenv failed: %m\n"); - rc = -errno; - } else { - rc = 0; // Single point of success - } - } else { - fprintf(stderr, "Could not get surface ID from WM: %s\n", - j != nullptr ? json_object_to_json_string_ext( - j, JSON_C_TO_STRING_PRETTY) - : "no-info"); - rc = -EINVAL; - } - }); - - if (rc2 < 0) { - rc = rc2; - } - - if (rc >= 0) { - this->labels.insert(this->labels.end(), label); - } - - return rc; -} - -int LibWindowmanager::Impl::activateSurface(const char *label) { - TRACE(); - json_object *j = drawing_name_json_argument(label); - return this->api_call("ActivateSurface", j, [](bool ok, json_object *j) { - if (!ok) { - fprintf(stderr, "API Call activate_surface() failed: %s\n", - j != nullptr ? json_object_to_json_string_ext( - j, JSON_C_TO_STRING_PRETTY) - : "no-info"); - } - }); -} - -int LibWindowmanager::Impl::deactivateSurface(const char *label) { - TRACE(); - json_object *j = drawing_name_json_argument(label); - return this->api_call("DeactivateSurface", j, [](bool ok, json_object *j) { - if (!ok) { - fprintf(stderr, "API Call deactivate_surface() failed: %s\n", - j != nullptr ? json_object_to_json_string_ext( - j, JSON_C_TO_STRING_PRETTY) - : "no-info"); - } - }); -} - -int LibWindowmanager::Impl::endDraw(const char *label) { - TRACE(); - json_object *j = drawing_name_json_argument(label); - return this->api_call("EndDraw", j, [](bool ok, json_object *j) { - if (!ok) { - fprintf(stderr, "API Call endDraw() failed: %s\n", - j != nullptr ? json_object_to_json_string_ext( - j, JSON_C_TO_STRING_PRETTY) - : "no-info"); - } - }); -} - -void LibWindowmanager::Impl::set_event_handler( - enum EventType et, std::function<void(char const *)> func) { - TRACE(); - - if (et >= 1 && et <= 6) { // Yeah ... just go with it! - this->handlers[et] = std::move(func); - } -} - -namespace { -std::pair<bool, LibWindowmanager::EventType> make_event_type(char const *et) { - // Event have the form "$API/$EVENT", just try to find the first / and - // get on with it. - char const *et2 = strchr(et, '/'); - if (et2 != nullptr) { - et = et2 + 1; - } - -#define ET(N, A) \ - do { \ - if (strcasecmp(et, N) == 0) \ - return std::pair<bool, LibWindowmanager::EventType>( \ - true, CONCAT(LibWindowmanager::Event_, A)); \ - } while (false) - - ET("active", Active); - ET("inactive", Inactive); - ET("visible", Visible); - ET("invisible", Invisible); - ET("syncdraw", SyncDraw); - ET("flushdraw", FlushDraw); -#undef ET - - return std::pair<bool, LibWindowmanager::EventType>(false, - LibWindowmanager::Event_Active); -} -} // namespace - -static void _on_reply_static(void *closure, struct afb_wsj1_msg *msg) -{ - // nop -} - - -/// object will be json_object_put -int LibWindowmanager::Impl::api_call( - const char *verb, json_object *object, - const std::function<void(bool, json_object *)> &onReply) { - TRACE(); - - int rc = 0; - if (0 == strcmp("RequestSurface", verb)) { - // We need to wrap the actual onReply call once in order to - // *look* like a normal functions pointer (std::functions<> - // with captures cannot convert to function pointers). - // Alternatively we could setup a local struct and use it as - // closure, but I think it is cleaner this way. - int call_rc = 0; - std::atomic<bool> returned{}; - returned.store(false, std::memory_order_relaxed); - std::function<void(bool, json_object *)> wrappedOnReply = - [&returned, &call_rc, &onReply](bool ok, json_object *j) { - TRACEN(wrappedOnReply); - call_rc = ok ? 0 : -EINVAL; - // We know it failed, but there may be an explanation in the - // json object. - { - TRACEN(onReply); - onReply(ok, j); - } - returned.store(true, std::memory_order_release); - }; - - // make the actual call, use wrappedOnReply as closure - rc = afb_wsj1_call_j( - this->wsj1, wmAPI, verb, object, - [](void *closure, afb_wsj1_msg *msg) { - TRACEN(callClosure); - auto *onReply = - reinterpret_cast<std::function<void(bool, json_object *)> *>( - closure); - (*onReply)(!(afb_wsj1_msg_is_reply_ok(msg) == 0), - afb_wsj1_msg_object_j(msg)); - }, - &wrappedOnReply); - - if (0 == rc) { - // We need to wait until "returned" got set, this is necessary - // if events get triggered by the call (and would be dispatched before - // the actual call-reply). - while (!returned.load(std::memory_order_consume)) { - sd_event_run(loop, 16); - } - - // return the actual API call result - rc = call_rc; - } - } - else { - rc = afb_wsj1_call_j(this->wsj1, wmAPI, verb, object, _on_reply_static, this); - } - - if (rc < 0) { - fprintf( - stderr, "calling %s/%s(%s) failed: %m\n", wmAPI, verb, - json_object_to_json_string_ext(object, JSON_C_TO_STRING_PRETTY)); - // Call the reply handler regardless with a NULL json_object* - onReply(false, nullptr); - } - - return rc; -} - -void LibWindowmanager::Impl::event(char const *et, char const *label) { - TRACE(); - auto oet = make_event_type(et); - if (!oet.first) { - fprintf(stderr, "Unknown event type string '%s'\n", et); - return; - } - - auto i = this->handlers.find(oet.second); - if (i != this->handlers.end()) { - if (this->labels.find(label) != this->labels.end()) { - i->second(label); - } - } -} - -static void *event_loop_run(void *args){ - struct sd_event* loop = (struct sd_event*)(args); - for(;;) - sd_event_run(loop, 30000000); -} - -int LibWindowmanager::Impl::runEventLoop() { - if(this->wsj1 && this->loop) - { - pthread_t thread_id; - int ret = pthread_create(&thread_id, NULL, event_loop_run, this->loop); - if(ret != 0) - { - printf("Cannot run eventloop due to error:%d", errno); - return -1; - } - else - return thread_id; - } - else - { - printf("Connecting is not established yet"); - return -1; - } -} - -// _ _ _____ ____ ____ _ _ _ -// ___| | __ _ ___ ___ / \ | ___| __ ) / ___| (_) ___ _ __ | |_ -// / __| |/ _` / __/ __| / _ \ | |_ | _ \| | | | |/ _ \ '_ \| __| -// | (__| | (_| \__ \__ \ / ___ \| _| | |_) | |___| | | __/ | | | |_ -// \___|_|\__,_|___/___/ /_/ \_\_| |____/ \____|_|_|\___|_| |_|\__| -// -int LibWindowmanager::init(int port, char const *token) { - return this->d->init(port, token); -} - -int LibWindowmanager::requestSurface(const char *label) { - return this->d->requestSurface(label); -} - -int LibWindowmanager::activateSurface(const char *label) { - return this->d->activateSurface(label); -} - -int LibWindowmanager::deactivateSurface(const char *label) { - return this->d->deactivateSurface(label); -} - -int LibWindowmanager::endDraw(const char *label) { return this->d->endDraw(label); } - -void LibWindowmanager::set_event_handler(enum EventType et, - std::function<void(char const *label)> f) { - return this->d->set_event_handler(et, std::move(f)); -} - -LibWindowmanager::LibWindowmanager() : d(new Impl) {} - -LibWindowmanager::~LibWindowmanager() { delete d; } |