建立工程，成功创建两个虚拟串口

source/OpenAMP/libmetal/test/system/linux/threads.c

@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2016, Xilinx Inc. and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <metal/sys.h>
+#include <metal/utilities.h>
+#include "metal-test.h"
+
+int metal_run(int threads, metal_thread_t child, void *arg)
+{
+	pthread_t tids[threads];
+	int error, ts_created;
+
+	error = metal_run_noblock(threads, child, arg, tids, &ts_created);
+
+	metal_finish_threads(ts_created, (void *)tids);
+
+	return error;
+}
+
+int metal_run_noblock(int threads, metal_thread_t child,
+		     void *arg, void *tids, int *threads_out)
+{
+	int error, i;
+	pthread_t *tid_p = (pthread_t *)tids;
+
+	if (!tids) {
+		metal_log(METAL_LOG_ERROR, "invalid arguement, tids is NULL.\n");
+		return -EINVAL;
+	}
+
+	error = 0;
+	for (i = 0; i < threads; i++) {
+		error = -pthread_create(&tid_p[i], NULL, child, arg);
+		if (error) {
+			metal_log(METAL_LOG_ERROR, "failed to create thread - %s\n",
+				  strerror(error));
+			break;
+		}
+	}
+
+	*threads_out = i;
+	return error;
+}
+
+void metal_finish_threads(int threads, void *tids)
+{
+	int i;
+	pthread_t *tid_p = (pthread_t *)tids;
+
+	if (!tids) {
+		metal_log(METAL_LOG_ERROR, "invalid argument, tids is NULL.\n");
+		return;
+	}
+
+	for (i = 0; i < threads; i++)
+		(void)pthread_join(tid_p[i], NULL);
+}