WebAssembly Micro Runtime first version

core/iwasm/lib/app-libs/base/timer.c

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+/*
+ * Copyright (C) 2019 Intel Corporation.  All rights reserved.
+ *
+ * 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.
+ */
+
+#include "timer_wasm_app.h"
+#include "native_interface.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+#if 1
+#include <stdio.h>
+#else
+#define printf (...)
+#endif
+
+struct user_timer {
+    struct user_timer * next;
+    int timer_id;
+    void (*user_timer_callback)(user_timer_t);
+};
+
+struct user_timer * g_timers = NULL;
+
+user_timer_t api_timer_create(int interval, bool is_period, bool auto_start,
+        void (*on_timer_update)(user_timer_t))
+{
+
+    int timer_id = wasm_create_timer(interval, is_period, auto_start);
+
+    //TODO
+    struct user_timer * timer = (struct user_timer *) malloc(
+            sizeof(struct user_timer));
+    if (timer == NULL) {
+        // TODO: remove the timer_id
+        printf("### api_timer_create malloc faild!!! \n");
+        return NULL;
+    }
+
+    memset(timer, 0, sizeof(*timer));
+    timer->timer_id = timer_id;
+    timer->user_timer_callback = on_timer_update;
+
+    if (g_timers == NULL)
+        g_timers = timer;
+    else {
+        timer->next = g_timers;
+        g_timers = timer;
+    }
+
+    return timer;
+}
+
+void api_timer_cancel(user_timer_t timer)
+{
+    user_timer_t t = g_timers, prev = NULL;
+
+    wasm_timer_cancel(timer->timer_id);
+
+    while (t) {
+        if (t == timer) {
+            if (prev == NULL) {
+                g_timers = t->next;
+                free(t);
+            } else {
+                prev->next = t->next;
+                free(t);
+            }
+            return;
+        } else {
+            prev = t;
+            t = t->next;
+        }
+    }
+}
+
+void api_timer_restart(user_timer_t timer, int interval)
+{
+    wasm_timer_restart(timer->timer_id, interval);
+}
+
+void on_timer_callback(int timer_id)
+{
+    struct user_timer * t = g_timers;
+
+    while (t) {
+        if (t->timer_id == timer_id) {
+            t->user_timer_callback(t);
+            break;
+        }
+        t = t->next;
+    }
+}
+