C++ (Cpp) fs_wait_read_custom示例

示例#1

文件： fs.c 项目： Montanari9/Ethernet_training

/*-----------------------------------------------------------------------------------*/
#if LWIP_HTTPD_DYNAMIC_FILE_READ
#if LWIP_HTTPD_FS_ASYNC_READ
int
fs_read_async(struct fs_file *file, char *buffer, int count, fs_wait_cb callback_fn, void *callback_arg)
#else /* LWIP_HTTPD_FS_ASYNC_READ */
int
fs_read(struct fs_file *file, char *buffer, int count)
#endif /* LWIP_HTTPD_FS_ASYNC_READ */
{
  int read;

  if(file->index == file->len) {
    return FS_READ_EOF;
  }
#if LWIP_HTTPD_FS_ASYNC_READ
#if LWIP_HTTPD_CUSTOM_FILES
  if (!fs_canread_custom(file)) {
    if (fs_wait_read_custom(file, callback_fn, callback_arg)) {
      return FS_READ_DELAYED;
    }
  }
#else /* LWIP_HTTPD_CUSTOM_FILES */
  LWIP_UNUSED_ARG(callback_fn);
  LWIP_UNUSED_ARG(callback_arg);
#endif /* LWIP_HTTPD_CUSTOM_FILES */
#endif /* LWIP_HTTPD_FS_ASYNC_READ */

  read = file->len - file->index;
  if(read > count) {
    read = count;
  }

  MEMCPY(buffer, (file->data + file->index), read);
  file->index += read;

  return(read);
}

示例#2

文件： fs.c 项目： pabigot/lwip-contrib

int
fs_is_file_ready(struct fs_file *file, fs_wait_cb callback_fn, void *callback_arg)
{
  if (file != NULL) {
#if LWIP_HTTPD_FS_ASYNC_READ && LWIP_HTTPD_CUSTOM_FILES
    if (!fs_canread_custom(file)) {
      if (fs_wait_read_custom(file, callback_fn, callback_arg)) {
        return 0;
      }
    }
#endif /* LWIP_HTTPD_FS_ASYNC_READ && LWIP_HTTPD_CUSTOM_FILES */
  }
  return 1;
}