Add standalone cases (#3536)

tests/standalone/test-pthread/create_join.c

@@ -0,0 +1,68 @@
+/*
+ * This file is copied from https://web.dev/articles/wasm-threads
+ */
+
+#include <pthread.h>
+#include <stdio.h>
+
+/* Calculate Fibonacci numbers shared function */
+int
+fibonacci(int iterations)
+{
+    int val = 1;
+    int last = 0;
+
+    if (iterations == 0) {
+        return 0;
+    }
+    for (int i = 1; i < iterations; i++) {
+        int seq;
+
+        seq = val + last;
+        last = val;
+        val = seq;
+    }
+    return val;
+}
+
+int bg = 42;
+
+/* Start function for the background thread */
+void *
+bg_func(void *arg)
+{
+    int *iter = (void *)arg;
+
+    *iter = fibonacci(*iter);
+    printf("bg number: %d\n", *iter);
+    return arg;
+}
+
+/* Foreground thread and main entry point */
+int
+main(int argc, char *argv[])
+{
+    int fg_val = 54;
+    int bg_val = 42;
+    pthread_t bg_thread;
+
+    /* Create the background thread */
+    if (pthread_create(&bg_thread, NULL, bg_func, &bg_val)) {
+        printf("Thread create failed");
+        return 1;
+    }
+
+    /* Calculate on the foreground thread */
+    fg_val = fibonacci(fg_val);
+
+    /* Wait for background thread to finish */
+    if (pthread_join(bg_thread, NULL)) {
+        printf("Thread join failed");
+        return 2;
+    }
+
+    /* Show the result from background and foreground threads */
+    printf("Fib(42) is %d, Fib(6 * 9) is %d\n", bg_val, fg_val);
+
+    return 0;
+}