examples/hello_nim/hello_nim_async.nim

#[
 ****************************************************************************
 * apps/examples/hello_nim/hello_nim_async.c
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.  The
 * ASF licenses this file to you 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.
 *
 ****************************************************************************/
]#

import std/asyncdispatch
import std/strformat

proc task(id: int): Future[void] {.async.} =
  for loop in 0..2:
    echo &"Hello from task {id}! loops: {loop}"
    if loop < 2:
      await sleepAsync(1000)

proc launch() {.async.} =
  for id in 1..2:
    asyncCheck task(id)
    await sleepAsync(200)
  await task(3)

proc hello_nim() {.exportc, cdecl.} =
  waitFor launch()
  GC_runOrc()