+++ /dev/null
-#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; }
Code Review / staging / windowmanager.git / blobdiff