diff options
author | Marcus Fritzsch <marcus_fritzsch@mentor.com> | 2017-09-12 12:06:20 +0200 |
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committer | Marcus Fritzsch <marcus_fritzsch@mentor.com> | 2017-09-14 14:04:51 +0200 |
commit | 530b7054a0f2800936ef312f016b9d55f9defddf (patch) | |
tree | 788a9d7d62a70ec4e02cd6abbbd687ea28e1ab3b /AFBClient.cpp | |
parent | da89d53e9abb971d3e2898597362f8886159868b (diff) |
Move AFBClient to client-lib/
Signed-off-by: Marcus Fritzsch <marcus_fritzsch@mentor.com>
Diffstat (limited to 'AFBClient.cpp')
-rw-r--r-- | AFBClient.cpp | 461 |
1 files changed, 0 insertions, 461 deletions
diff --git a/AFBClient.cpp b/AFBClient.cpp deleted file mode 100644 index 1677509..0000000 --- a/AFBClient.cpp +++ /dev/null @@ -1,461 +0,0 @@ -#include "AFBClient.h" - -#include <cassert> -#include <cctype> -#include <cerrno> -#include <cstdio> -#include <cstdlib> -#include <cstring> - -#include <atomic> -#include <map> -#include <mutex> -#include <set> - -#include <unistd.h> - -#include <systemd/sd-event.h> - -#include <json-c/json.h> - -extern "C" { -#include <afb/afb-ws-client.h> -#include <afb/afb-wsj1.h> -} - -#define UNUSED(x) (void)(x) - -// _ ___ _ -// ___| | __ _ ___ ___ |_ _|_ __ ___ _ __ | | -// / __| |/ _` / __/ __| | || '_ ` _ \| '_ \| | -// | (__| | (_| \__ \__ \ | || | | | | | |_) | | -// \___|_|\__,_|___/___/ |___|_| |_| |_| .__/|_| -// |_| -class AFBClient::Impl { - friend class AFBClient; - - // This is the AFBClient interface impl - int init(int port, char const *token); - int dispatch(); - - // 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; - - int api_call(const char *verb, json_object *object, - const std::function<void(bool, json_object *)> &onReply); - void dispatch_internal(); - -public: - void event(char const *et, char const *label); -}; - -namespace { - -constexpr const int token_maxlen = 20; -constexpr const char *const wmAPI = "winman"; - -#ifdef NDEBUG -#define TRACE() -#define TRACEN(N) -#else -#define CONCAT_(X, Y) X##Y -#define CONCAT(X, Y) CONCAT_(X, Y) - -#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(); - reinterpret_cast<AFBClient::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 - -// _ ___ _ _ _ -// ___| | __ _ ___ ___ |_ _|_ __ ___ _ __ | | (_)_ __ ___ _ __ | | -// / __| |/ _` / __/ __| | || '_ ` _ \| '_ \| | | | '_ ` _ \| '_ \| | -// | (__| | (_| \__ \__ \ | || | | | | | |_) | | | | | | | | | |_) | | -// \___|_|\__,_|___/___/ |___|_| |_| |_| .__/|_| |_|_| |_| |_| .__/|_| -// |_| |_| -AFBClient::Impl::Impl() : wsj1{}, loop{}, labels(), handlers() { TRACE(); } - -AFBClient::Impl::~Impl() { - TRACE(); - afb_wsj1_unref(wsj1); - sd_event_unref(loop); -} - -int AFBClient::Impl::init(int port, char const *token) { - TRACE(); - char *uribuf = nullptr; - int rc = -1; - - if (this->loop != nullptr && this->wsj1 != nullptr) { - fputs("AFBClient instance is already initialized!\n", stderr); - rc = -EALREADY; - goto fail; - } - - if ((token == nullptr) || strlen(token) > token_maxlen) { - fputs("Token is invalid\n", stderr); - rc = -EINVAL; - goto fail; - } - - for (char const *p = token; *p != 0; p++) { - if (isalnum(*p) == 0) { - 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; - } - - return 0; - -fail: - return rc; -} - -int AFBClient::Impl::dispatch() { - std::lock_guard<std::recursive_mutex> guard(dispatch_mutex); - return sd_event_run(this->loop, 1); -} - -int AFBClient::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("request_surface", 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 AFBClient::Impl::activateSurface(const char *label) { - TRACE(); - json_object *j = drawing_name_json_argument(label); - return this->api_call("activate_surface", 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 AFBClient::Impl::deactivateSurface(const char *label) { - TRACE(); - json_object *j = drawing_name_json_argument(label); - return this->api_call("deactivate_surface", 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 AFBClient::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 AFBClient::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, AFBClient::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, AFBClient::EventType>( \ - true, CONCAT(AFBClient::Event_, A)); \ - } while (false) - - ET("activated", Active); - ET("deactivated", Inactive); - ET("visible", Visible); - ET("invisible", Invisible); - ET("syncdraw", SyncDraw); - ET("flushdraw", FlushDraw); -#undef ET - - return std::pair<bool, AFBClient::EventType>(false, - AFBClient::Event_Active); -} -} // namespace - -/// object will be json_object_put -int AFBClient::Impl::api_call( - const char *verb, json_object *object, - const std::function<void(bool, json_object *)> &onReply) { - TRACE(); - - // 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 - int 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 (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); - } else { - // We need to dispatch 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)) { - std::lock_guard<std::recursive_mutex> guard(dispatch_mutex); - if (!returned.load(std::memory_order_consume)) { - this->dispatch_internal(); - } - } - - // return the actual API call result - rc = call_rc; - } - - return rc; -} - -void AFBClient::Impl::dispatch_internal() { - std::lock_guard<std::recursive_mutex> guard(dispatch_mutex); - TRACE(); - sd_event_run(this->loop, -1); -} - -void AFBClient::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); - } - } -} - -// _ _ _____ ____ ____ _ _ _ -// ___| | __ _ ___ ___ / \ | ___| __ ) / ___| (_) ___ _ __ | |_ -// / __| |/ _` / __/ __| / _ \ | |_ | _ \| | | | |/ _ \ '_ \| __| -// | (__| | (_| \__ \__ \ / ___ \| _| | |_) | |___| | | __/ | | | |_ -// \___|_|\__,_|___/___/ /_/ \_\_| |____/ \____|_|_|\___|_| |_|\__| -// -int AFBClient::init(int port, char const *token) { - return this->d->init(port, token); -} - -int AFBClient::dispatch() { return this->d->dispatch(); } - -int AFBClient::requestSurface(const char *label) { - return this->d->requestSurface(label); -} - -int AFBClient::activateSurface(const char *label) { - return this->d->activateSurface(label); -} - -int AFBClient::deactivateSurface(const char *label) { - return this->d->deactivateSurface(label); -} - -int AFBClient::endDraw(const char *label) { return this->d->endDraw(label); } - -void AFBClient::set_event_handler(enum EventType et, - std::function<void(char const *label)> f) { - return this->d->set_event_handler(et, std::move(f)); -} - -AFBClient &AFBClient::instance() { - TRACE(); - static AFBClient obj; - return obj; -} - -AFBClient::AFBClient() : d(new Impl) {} - -AFBClient::~AFBClient() { delete d; } |