Function writev

lib/internal/streams/iter/classic.js:620–663

(chunks)

    },

    writev(chunks) {
      if (!ArrayIsArray(chunks)) {
        throw new ERR_INVALID_ARG_TYPE('chunks', 'Array', chunks);
      }
      if (!isWritable()) {
        return PromiseReject(new ERR_STREAM_WRITE_AFTER_END());
      }

      if (backpressure === 'strict' && isFull()) {
        return PromiseReject(new ERR_INVALID_STATE.RangeError(
          'Backpressure violation: buffer is full. ' +
          'Await each write() call to respect backpressure.'));
      }

      if (backpressure === 'drop-newest' && isFull()) {
        // Discard entire batch.
        for (let i = 0; i < chunks.length; i++) {
          totalBytes +=
            TypedArrayPrototypeGetByteLength(toUint8Array(chunks[i]));
        }
        return PromiseResolve();
      }

      let ok = true;
      if (typeof writable.cork === 'function' &&
          typeof writable.uncork === 'function') {
        writable.cork();
        try {
          ok = writeChunks(chunks);
        } finally {
          writable.uncork();
        }
      } else {
        ok = writeChunks(chunks);
      }

      if (ok) return PromiseResolve();

      if (backpressure === 'block') {
        return waitForDrain();
      }

      return PromiseResolve();
    },

    endSync() {
      return -1;