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Copy pathquickjs_worker.cpp
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168 lines (147 loc) · 5.47 KB
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#include "quickjs_worker.h"
#include "core/os/os.h"
void QuickJSWorker::thread_main(void *p_this) {
QuickJSWorker *self = static_cast<QuickJSWorker *>(p_this);
self->initialize();
self->running = true;
Error err;
String text = FileAccess::get_file_as_string(self->entry_script, &err);
if (err == OK) {
String err_text;
ECMAScriptGCHandler eval_ret;
err = self->safe_eval_text(text, ECMAScriptBinder::EVAL_TYPE_MODULE, self->entry_script, err_text, eval_ret);
if (err == OK) {
JSValue onmessage_callback = JS_GetPropertyStr(self->ctx, self->global_object, "onmessage");
bool onmessage_valid = JS_IsFunction(self->ctx, onmessage_callback);
while (self->running) {
self->frame();
if (onmessage_valid) {
List<Variant> messages;
{
GLOBAL_LOCK_FUNCTION
for (List<Variant>::Element *E = self->input_message_queue.front(); E; E = E->next()) {
messages.push_back(E->get());
}
self->input_message_queue.clear();
}
for (List<Variant>::Element *E = messages.front(); E; E = E->next()) {
JSValue argv[] = { variant_to_var(self->ctx, E->get()) };
JSValue ret = JS_Call(self->ctx, onmessage_callback, self->global_object, 1, argv);
if (JS_IsException(ret)) {
JSValue e = JS_GetException(self->ctx);
ECMAscriptScriptError err;
dump_exception(self->ctx, e, &err);
ERR_PRINT(String("Error in worker onmessage callback") + ENDL + self->error_to_string(err));
JS_FreeValue(self->ctx, e);
}
JS_FreeValue(self->ctx, argv[0]);
}
}
OS::get_singleton()->delay_usec(1000);
}
JS_FreeValue(self->ctx, onmessage_callback);
} else {
ERR_PRINT("Failed to eval entry script:" + self->entry_script + "\nError:" + err_text);
}
} else {
ERR_PRINT("Failed to load entry script:" + self->entry_script);
}
self->uninitialize();
}
JSValue QuickJSWorker::global_worker_close(JSContext *ctx, JSValue this_val, int argc, JSValue *argv) {
QuickJSWorker *worker = static_cast<QuickJSWorker *>(get_context_binder(ctx));
if (worker) {
worker->running = false;
}
return JS_UNDEFINED;
}
JSValue QuickJSWorker::global_worker_post_message(JSContext *ctx, JSValue this_val, int argc, JSValue *argv) {
ERR_FAIL_COND_V(argc < 1, JS_ThrowTypeError(ctx, "message value expected of argument #0"));
QuickJSWorker *worker = static_cast<QuickJSWorker *>(get_context_binder(ctx));
if (worker) {
GLOBAL_LOCK_FUNCTION
worker->output_message_queue.push_back(var_to_variant(ctx, argv[0]));
}
return JS_UNDEFINED;
}
JSValue QuickJSWorker::global_import_scripts(JSContext *ctx, JSValue this_val, int argc, JSValue *argv) {
for (int i = 0; i < argc; i++) {
if (JS_IsString(argv[i])) {
Error err;
String path = resolve_module_file(js_to_string(ctx, argv[0]));
String source = FileAccess::get_file_as_string(path, &err);
QuickJSBinder *bind = get_context_binder(ctx);
ECMAScriptGCHandler eval_ret;
bind->eval_string(source, ECMAScriptBinder::EVAL_TYPE_GLOBAL, path, eval_ret);
}
}
return JS_UNDEFINED;
}
QuickJSWorker::QuickJSWorker(const QuickJSBinder *p_host_context) :
QuickJSBinder() {
running = false;
host_context = p_host_context;
}
QuickJSWorker::~QuickJSWorker() {
stop();
}
void QuickJSWorker::initialize() {
QuickJSBinder::initialize();
// onmessage
JS_SetPropertyStr(ctx, global_object, "onmessage", JS_NULL);
// close
JSValue close_func = JS_NewCFunction(ctx, global_worker_close, "close", 0);
JS_DefinePropertyValueStr(ctx, global_object, "close", close_func, PROP_DEF_DEFAULT);
JSValue post_message_func = JS_NewCFunction(ctx, global_worker_post_message, "postMessage", 1);
// INSIDE_WORKER
JS_DefinePropertyValueStr(ctx, global_object, "postMessage", post_message_func, PROP_DEF_DEFAULT);
JS_DefinePropertyValueStr(ctx, global_object, "INSIDE_WORKER", JS_TRUE, JS_PROP_ENUMERABLE);
// importScripts
JSValue import_scripts_func = JS_NewCFunction(ctx, global_import_scripts, "importScripts", 10);
JS_DefinePropertyValueStr(ctx, global_object, "importScripts", import_scripts_func, JS_PROP_ENUMERABLE);
}
void QuickJSWorker::uninitialize() {
QuickJSBinder::uninitialize();
}
bool QuickJSWorker::frame_of_host(QuickJSBinder *host, const JSValueConst &value) {
JSValue onmessage_callback = JS_GetPropertyStr(host->ctx, value, "onmessage");
if (JS_IsFunction(host->ctx, onmessage_callback)) {
List<Variant> messages;
{
GLOBAL_LOCK_FUNCTION
for (List<Variant>::Element *E = output_message_queue.front(); E; E = E->next()) {
messages.push_back(E->get());
}
output_message_queue.clear();
}
for (List<Variant>::Element *E = messages.front(); E; E = E->next()) {
JSValue argv[] = { variant_to_var(host->ctx, E->get()) };
JSValue ret = JS_Call(host->ctx, onmessage_callback, JS_NULL, 1, argv);
if (JS_IsException(ret)) {
JSValue e = JS_GetException(host->ctx);
ECMAscriptScriptError err;
dump_exception(host->ctx, e, &err);
ERR_PRINT(String("Error in worker onmessage callback") + ENDL + error_to_string(err));
JS_FreeValue(host->ctx, e);
}
JS_FreeValue(host->ctx, argv[0]);
}
}
JS_FreeValue(host->ctx, onmessage_callback);
return running;
}
void QuickJSWorker::post_message_from_host(const Variant &p_message) {
GLOBAL_LOCK_FUNCTION
input_message_queue.push_back(p_message);
}
void QuickJSWorker::start(const String &p_path) {
ERR_FAIL_COND(running || thread.is_started());
entry_script = p_path;
thread.start(thread_main, this);
}
void QuickJSWorker::stop() {
if (thread.is_started()) {
running = false;
thread.wait_to_finish();
}
}