Method fdWrite

lib/host/wasi/inode-linux.cpp:590–607

}

WasiExpect<void> INode::fdWrite(Span<Span<const uint8_t>> IOVs,
                                __wasi_size_t &NWritten) const noexcept {
  iovec SysIOVs[kIOVMax];
  size_t SysIOVsSize = 0;
  for (auto &IOV : IOVs) {
    SysIOVs[SysIOVsSize].iov_base = const_cast<uint8_t *>(IOV.data());
    SysIOVs[SysIOVsSize].iov_len = IOV.size();
    ++SysIOVsSize;
  }

  if (auto Res = ::writev(Fd, SysIOVs, SysIOVsSize); unlikely(Res < 0)) {
    return WasiUnexpect(fromErrNo(errno));
  } else {
    NWritten = EndianValue(static_cast<__wasi_size_t>(Res)).le();
  }

  return {};
}

WasiExpect<uint64_t> INode::getNativeHandler() const noexcept {
  return static_cast<uint64_t>(Fd);