Import of the watch repository from Pebble

third_party/jerryscript/targets/mbedos5/jerryscript-mbed/jerryscript-mbed-event-loop/EventLoop.h

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+/* Copyright (c) 2016 ARM Limited
+ *
+ * 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.
+ */
+#ifndef _JERRYSCRIPT_MBED_EVENT_LOOP_EVENT_LOOP_H
+#define _JERRYSCRIPT_MBED_EVENT_LOOP_EVENT_LOOP_H
+
+#include <vector>
+
+#include "jerry-core/jerry-api.h"
+
+#include "Callback.h"
+#include "mbed_assert.h"
+
+#include "mbed-events/EventQueue.h"
+
+#include "jerryscript-mbed-util/logging.h"
+#include "jerryscript-mbed-event-loop/BoundCallback.h"
+
+extern "C" void exit(int return_code);
+
+namespace mbed {
+namespace js {
+
+static const uint32_t EVENT_INTERVAL_MS = 1;
+
+class EventLoop {
+ private:
+    static EventLoop instance;
+
+ public:
+    static EventLoop& getInstance() {
+        return instance;
+    }
+
+    void go() {
+        while (true) {
+            queue.dispatch();
+        }
+    }
+
+    Callback<void()> wrapFunction(jerry_value_t f) {
+        MBED_ASSERT(jerry_value_is_function(f));
+
+        // not sure if this is necessary?
+        jerry_acquire_value(f);
+
+        // we need to return a callback that'll schedule this
+        Callback<void(uint32_t)> cb_raw(this, &EventLoop::callback);
+        BoundCallback<void(uint32_t)> *cb = new BoundCallback<void(uint32_t)>(cb_raw, f);
+
+        bound_callbacks.push_back(std::make_pair(f, cb));
+
+        return *cb;
+    }
+
+    void dropCallback(jerry_value_t f) {
+        jerry_release_value(f);
+
+        for (std::vector<std::pair<jerry_value_t, BoundCallback<void(uint32_t)>*> >::iterator it = bound_callbacks.begin(); it != bound_callbacks.end(); it++) {
+            std::pair<jerry_value_t, BoundCallback<void(uint32_t)>*> element = *it;
+
+            if (element.first == f) {
+                delete element.second;
+                break;
+            }
+        }
+    }
+
+    void callback(jerry_value_t f) {
+        queue.call(jerry_call_function, f, jerry_create_null(), (const jerry_value_t*)NULL, 0);
+    }
+
+    void nativeCallback(Callback<void()> cb) {
+        queue.call(cb);
+    }
+
+    events::EventQueue& getQueue() {
+        return queue;
+    }
+
+ private:
+    EventLoop() {}
+
+    std::vector<std::pair<jerry_value_t, BoundCallback<void(uint32_t)>*> > bound_callbacks;
+    events::EventQueue queue;
+};
+
+void event_loop();
+
+}  // namespace js
+}  // namespace mbed
+
+#endif  // _JERRYSCRIPT_MBED_EVENT_LOOP_EVENT_LOOP_H