void network_error() {
Json::Value writerRoot;
writerRoot["result"] = 1;
writerRoot["type"] = "network error";
Json::StyledWriter writer;
std::string msg(writer.write(writerRoot));
struct PP_Var var = PSInterfaceVar()->VarFromUtf8(msg.data(), msg.length());
PSInterfaceMessaging()->PostMessage(PSGetInstanceId(), var);
PSInterfaceVar()->Release(var);
}
struct PP_Var nspawn_send_request(struct PP_Var req_var) {
/*
* naclprocess.js is required in order send requests to JavaScript.
* If NACL_PROCESS is not set in the environment then we assume it is
* not present and exit early. Without this check we would block forever
* waiting for a response for the JavaScript side.
*
* Only check this once per process, as some programs (emacs)
* engage in manipulation of the environment that may not be safely
* read at all times.
*/
static int checked_for_nacl_process = 0;
if (!checked_for_nacl_process) {
const char* naclprocess = getenv("NACL_PROCESS");
if (naclprocess == NULL) {
fprintf(stderr, "nspawn_send_request called without NACL_PROCESS set\n");
return PP_MakeNull();
}
checked_for_nacl_process = 1;
}
int64_t id = get_request_id();
char req_id[64];
sprintf(req_id, "%lld", id);
nspawn_dict_setstring(req_var, "id", req_id);
struct NaClSpawnReply reply;
pthread_mutex_init(&reply.mu, NULL);
pthread_cond_init(&reply.cond, NULL);
PSEventRegisterMessageHandler(req_id, &handle_reply, &reply);
PSInterfaceMessaging()->PostMessage(PSGetInstanceId(), req_var);
nspawn_var_release(req_var);
pthread_mutex_lock(&reply.mu);
/*
* Wait for response for JavaScript. This can block for an unbounded amount
* of time (e.g. waiting for a response to waitpid).
*/
int error = pthread_cond_wait(&reply.cond, &reply.mu);
pthread_mutex_unlock(&reply.mu);
pthread_cond_destroy(&reply.cond);
pthread_mutex_destroy(&reply.mu);
PSEventRegisterMessageHandler(req_id, NULL, &reply);
if (error != 0) {
fprintf(stderr, "nspawn_send_request: pthread_cond_timedwait: %s\n",
strerror(error));
return PP_MakeNull();
}
return reply.result_var;
}
static void PostMessageString(const char* message) {
struct PP_Var message_var =
PSInterfaceVar()->VarFromUtf8(message, strlen(message));
PSInterfaceMessaging()->PostMessage(g_ps_instance, message_var);
PSInterfaceVar()->Release(message_var);
}
// PostUpdateMessage() helper function for sendimg small messages to JS.
void SimpleTemplate::PostUpdateMessage(const char* message_name, double value) {
pp::VarDictionary message;
message.Set("message", message_name);
message.Set("value", value);
PSInterfaceMessaging()->PostMessage(PSGetInstanceId(), message.pp_var());
}