no venv

1 files changed, 0 insertions, 1015 deletions

diff --git a/venv/lib/python3.11/site-packages/uvloop/handles/stream.pyx b/venv/lib/python3.11/site-packages/uvloop/handles/stream.pyx
deleted file mode 100644
index d4e02e3..0000000
--- a/venv/lib/python3.11/site-packages/uvloop/handles/stream.pyx
+++ /dev/null
@@ -1,1015 +0,0 @@
-DEF __PREALLOCED_BUFS = 4
-
-
-@cython.no_gc_clear
-@cython.freelist(DEFAULT_FREELIST_SIZE)
-cdef class _StreamWriteContext:
-    # used to hold additional write request information for uv_write
-
-    cdef:
-        uv.uv_write_t   req
-
-        list            buffers
-
-        uv.uv_buf_t     uv_bufs_sml[__PREALLOCED_BUFS]
-        Py_buffer       py_bufs_sml[__PREALLOCED_BUFS]
-        bint            py_bufs_sml_inuse
-
-        uv.uv_buf_t*    uv_bufs
-        Py_buffer*      py_bufs
-        size_t          py_bufs_len
-
-        uv.uv_buf_t*    uv_bufs_start
-        size_t          uv_bufs_len
-
-        UVStream        stream
-
-        bint            closed
-
-    cdef free_bufs(self):
-        cdef size_t i
-
-        if self.uv_bufs is not NULL:
-            PyMem_RawFree(self.uv_bufs)
-            self.uv_bufs = NULL
-            if UVLOOP_DEBUG:
-                if self.py_bufs_sml_inuse:
-                    raise RuntimeError(
-                        '_StreamWriteContext.close: uv_bufs != NULL and '
-                        'py_bufs_sml_inuse is True')
-
-        if self.py_bufs is not NULL:
-            for i from 0 <= i < self.py_bufs_len:
-                PyBuffer_Release(&self.py_bufs[i])
-            PyMem_RawFree(self.py_bufs)
-            self.py_bufs = NULL
-            if UVLOOP_DEBUG:
-                if self.py_bufs_sml_inuse:
-                    raise RuntimeError(
-                        '_StreamWriteContext.close: py_bufs != NULL and '
-                        'py_bufs_sml_inuse is True')
-
-        if self.py_bufs_sml_inuse:
-            for i from 0 <= i < self.py_bufs_len:
-                PyBuffer_Release(&self.py_bufs_sml[i])
-            self.py_bufs_sml_inuse = 0
-
-        self.py_bufs_len = 0
-        self.buffers = None
-
-    cdef close(self):
-        if self.closed:
-            return
-        self.closed = 1
-        self.free_bufs()
-        Py_DECREF(self)
-
-    cdef advance_uv_buf(self, size_t sent):
-        # Advance the pointer to first uv_buf and the
-        # pointer to first byte in that buffer.
-        #
-        # We do this after a "uv_try_write" call, which
-        # sometimes sends only a portion of data.
-        # We then call "advance_uv_buf" on the write
-        # context, and reuse it in a "uv_write" call.
-
-        cdef:
-            uv.uv_buf_t* buf
-            size_t idx
-
-        for idx from 0 <= idx < self.uv_bufs_len:
-            buf = &self.uv_bufs_start[idx]
-            if buf.len > sent:
-                buf.len -= sent
-                buf.base = buf.base + sent
-                self.uv_bufs_start = buf
-                self.uv_bufs_len -= idx
-                return
-            else:
-                sent -= self.uv_bufs_start[idx].len
-
-            if UVLOOP_DEBUG:
-                if sent < 0:
-                    raise RuntimeError('fatal: sent < 0 in advance_uv_buf')
-
-        raise RuntimeError('fatal: Could not advance _StreamWriteContext')
-
-    @staticmethod
-    cdef _StreamWriteContext new(UVStream stream, list buffers):
-        cdef:
-            _StreamWriteContext ctx
-            int uv_bufs_idx = 0
-            size_t py_bufs_len = 0
-            int i
-
-            Py_buffer* p_pybufs
-            uv.uv_buf_t* p_uvbufs
-
-        ctx = _StreamWriteContext.__new__(_StreamWriteContext)
-        ctx.stream = None
-        ctx.closed = 1
-        ctx.py_bufs_len = 0
-        ctx.py_bufs_sml_inuse = 0
-        ctx.uv_bufs = NULL
-        ctx.py_bufs = NULL
-        ctx.buffers = buffers
-        ctx.stream = stream
-
-        if len(buffers) <= __PREALLOCED_BUFS:
-            # We've got a small number of buffers to write, don't
-            # need to use malloc.
-            ctx.py_bufs_sml_inuse = 1
-            p_pybufs = <Py_buffer*>&ctx.py_bufs_sml
-            p_uvbufs = <uv.uv_buf_t*>&ctx.uv_bufs_sml
-
-        else:
-            for buf in buffers:
-                if UVLOOP_DEBUG:
-                    if not isinstance(buf, (bytes, bytearray, memoryview)):
-                        raise RuntimeError(
-                            'invalid data in writebuf: an instance of '
-                            'bytes, bytearray or memoryview was expected, '
-                            'got {}'.format(type(buf)))
-
-                if not PyBytes_CheckExact(buf):
-                    py_bufs_len += 1
-
-            if py_bufs_len > 0:
-                ctx.py_bufs = <Py_buffer*>PyMem_RawMalloc(
-                    py_bufs_len * sizeof(Py_buffer))
-                if ctx.py_bufs is NULL:
-                    raise MemoryError()
-
-            ctx.uv_bufs = <uv.uv_buf_t*>PyMem_RawMalloc(
-                len(buffers) * sizeof(uv.uv_buf_t))
-            if ctx.uv_bufs is NULL:
-                raise MemoryError()
-
-            p_pybufs = ctx.py_bufs
-            p_uvbufs = ctx.uv_bufs
-
-        py_bufs_len = 0
-        for buf in buffers:
-            if PyBytes_CheckExact(buf):
-                # We can only use this hack for bytes since it's
-                # immutable.  For everything else it is only safe to
-                # use buffer protocol.
-                p_uvbufs[uv_bufs_idx].base = PyBytes_AS_STRING(buf)
-                p_uvbufs[uv_bufs_idx].len = Py_SIZE(buf)
-
-            else:
-                try:
-                    PyObject_GetBuffer(
-                        buf, &p_pybufs[py_bufs_len], PyBUF_SIMPLE)
-                except Exception:
-                    # This shouldn't ever happen, as `UVStream._buffer_write`
-                    # casts non-bytes objects to `memoryviews`.
-                    ctx.py_bufs_len = py_bufs_len
-                    ctx.free_bufs()
-                    raise
-
-                p_uvbufs[uv_bufs_idx].base = <char*>p_pybufs[py_bufs_len].buf
-                p_uvbufs[uv_bufs_idx].len = p_pybufs[py_bufs_len].len
-
-                py_bufs_len += 1
-
-            uv_bufs_idx += 1
-
-        ctx.uv_bufs_start = p_uvbufs
-        ctx.uv_bufs_len = uv_bufs_idx
-
-        ctx.py_bufs_len = py_bufs_len
-        ctx.req.data = <void*> ctx
-
-        if UVLOOP_DEBUG:
-            stream._loop._debug_stream_write_ctx_total += 1
-            stream._loop._debug_stream_write_ctx_cnt += 1
-
-        # Do incref after everything else is done.
-        # Under no circumstances we want `ctx` to be GCed while
-        # libuv is still working with `ctx.uv_bufs`.
-        Py_INCREF(ctx)
-        ctx.closed = 0
-        return ctx
-
-    def __dealloc__(self):
-        if not self.closed:
-            # Because we do an INCREF in _StreamWriteContext.new,
-            # __dealloc__ shouldn't ever happen with `self.closed == 1`
-            raise RuntimeError(
-                'open _StreamWriteContext is being deallocated')
-
-        if UVLOOP_DEBUG:
-            if self.stream is not None:
-                self.stream._loop._debug_stream_write_ctx_cnt -= 1
-                self.stream = None
-
-
-@cython.no_gc_clear
-cdef class UVStream(UVBaseTransport):
-
-    def __cinit__(self):
-        self.__shutting_down = 0
-        self.__reading = 0
-        self.__read_error_close = 0
-        self.__buffered = 0
-        self._eof = 0
-        self._buffer = []
-        self._buffer_size = 0
-
-        self._protocol_get_buffer = None
-        self._protocol_buffer_updated = None
-
-        self._read_pybuf_acquired = False
-
-    cdef _set_protocol(self, object protocol):
-        if protocol is None:
-            raise TypeError('protocol is required')
-
-        UVBaseTransport._set_protocol(self, protocol)
-
-        if (hasattr(protocol, 'get_buffer') and
-                not isinstance(protocol, aio_Protocol)):
-            try:
-                self._protocol_get_buffer = protocol.get_buffer
-                self._protocol_buffer_updated = protocol.buffer_updated
-                self.__buffered = 1
-            except AttributeError:
-                pass
-        else:
-            self.__buffered = 0
-
-    cdef _clear_protocol(self):
-        UVBaseTransport._clear_protocol(self)
-        self._protocol_get_buffer = None
-        self._protocol_buffer_updated = None
-        self.__buffered = 0
-
-    cdef inline _shutdown(self):
-        cdef int err
-
-        if self.__shutting_down:
-            return
-        self.__shutting_down = 1
-
-        self._ensure_alive()
-
-        self._shutdown_req.data = <void*> self
-        err = uv.uv_shutdown(&self._shutdown_req,
-                             <uv.uv_stream_t*> self._handle,
-                             __uv_stream_on_shutdown)
-        if err < 0:
-            exc = convert_error(err)
-            self._fatal_error(exc, True)
-            return
-
-    cdef inline _accept(self, UVStream server):
-        cdef int err
-        self._ensure_alive()
-
-        err = uv.uv_accept(<uv.uv_stream_t*>server._handle,
-                           <uv.uv_stream_t*>self._handle)
-        if err < 0:
-            exc = convert_error(err)
-            self._fatal_error(exc, True)
-            return
-
-        self._on_accept()
-
-    cdef inline _close_on_read_error(self):
-        self.__read_error_close = 1
-
-    cdef bint _is_reading(self):
-        return self.__reading
-
-    cdef _start_reading(self):
-        cdef int err
-
-        if self._closing:
-            return
-
-        self._ensure_alive()
-
-        if self.__reading:
-            return
-
-        if self.__buffered:
-            err = uv.uv_read_start(<uv.uv_stream_t*>self._handle,
-                                   __uv_stream_buffered_alloc,
-                                   __uv_stream_buffered_on_read)
-        else:
-            err = uv.uv_read_start(<uv.uv_stream_t*>self._handle,
-                                   __loop_alloc_buffer,
-                                   __uv_stream_on_read)
-        if err < 0:
-            exc = convert_error(err)
-            self._fatal_error(exc, True)
-            return
-        else:
-            # UVStream must live until the read callback is called
-            self.__reading_started()
-
-    cdef inline __reading_started(self):
-        if self.__reading:
-            return
-        self.__reading = 1
-        Py_INCREF(self)
-
-    cdef inline __reading_stopped(self):
-        if not self.__reading:
-            return
-        self.__reading = 0
-        Py_DECREF(self)
-
-    cdef _stop_reading(self):
-        cdef int err
-
-        if not self.__reading:
-            return
-
-        self._ensure_alive()
-
-        # From libuv docs:
-        #    This function is idempotent and may be safely
-        #    called on a stopped stream.
-        err = uv.uv_read_stop(<uv.uv_stream_t*>self._handle)
-        if err < 0:
-            exc = convert_error(err)
-            self._fatal_error(exc, True)
-            return
-        else:
-            self.__reading_stopped()
-
-    cdef inline _try_write(self, object data):
-        cdef:
-            ssize_t written
-            bint used_buf = 0
-            Py_buffer py_buf
-            void* buf
-            size_t blen
-            int saved_errno
-            int fd
-
-        if (<uv.uv_stream_t*>self._handle).write_queue_size != 0:
-            raise RuntimeError(
-                'UVStream._try_write called with data in uv buffers')
-
-        if PyBytes_CheckExact(data):
-            # We can only use this hack for bytes since it's
-            # immutable.  For everything else it is only safe to
-            # use buffer protocol.
-            buf = <void*>PyBytes_AS_STRING(data)
-            blen = Py_SIZE(data)
-        else:
-            PyObject_GetBuffer(data, &py_buf, PyBUF_SIMPLE)
-            used_buf = 1
-            buf = py_buf.buf
-            blen = py_buf.len
-
-        if blen == 0:
-            # Empty data, do nothing.
-            return 0
-
-        fd = self._fileno()
-        # Use `unistd.h/write` directly, it's faster than
-        # uv_try_write -- less layers of code.  The error
-        # checking logic is copied from libuv.
-        written = system.write(fd, buf, blen)
-        while written == -1 and (
-                errno.errno == errno.EINTR or
-                (system.PLATFORM_IS_APPLE and
-                    errno.errno == errno.EPROTOTYPE)):
-            # From libuv code (unix/stream.c):
-            #   Due to a possible kernel bug at least in OS X 10.10 "Yosemite",
-            #   EPROTOTYPE can be returned while trying to write to a socket
-            #   that is shutting down. If we retry the write, we should get
-            #   the expected EPIPE instead.
-            written = system.write(fd, buf, blen)
-        saved_errno = errno.errno
-
-        if used_buf:
-            PyBuffer_Release(&py_buf)
-
-        if written < 0:
-            if saved_errno == errno.EAGAIN or \
-                    saved_errno == system.EWOULDBLOCK:
-                return -1
-            else:
-                exc = convert_error(-saved_errno)
-                self._fatal_error(exc, True)
-                return
-
-        if UVLOOP_DEBUG:
-            self._loop._debug_stream_write_tries += 1
-
-        if <size_t>written == blen:
-            return 0
-
-        return written
-
-    cdef inline _buffer_write(self, object data):
-        cdef int dlen
-
-        if not PyBytes_CheckExact(data):
-            data = memoryview(data).cast('b')
-
-        dlen = len(data)
-        if not dlen:
-            return
-
-        self._buffer_size += dlen
-        self._buffer.append(data)
-
-    cdef inline _initiate_write(self):
-        if (not self._protocol_paused and
-                (<uv.uv_stream_t*>self._handle).write_queue_size == 0 and
-                self._buffer_size > self._high_water):
-            # Fast-path.  If:
-            #   - the protocol isn't yet paused,
-            #   - there is no data in libuv buffers for this stream,
-            #   - the protocol will be paused if we continue to buffer data
-            #
-            # Then:
-            #   - Try to write all buffered data right now.
-            all_sent = self._exec_write()
-            if UVLOOP_DEBUG:
-                if self._buffer_size != 0 or self._buffer != []:
-                    raise RuntimeError(
-                        '_buffer_size is not 0 after a successful _exec_write')
-
-            # There is no need to call `_queue_write` anymore,
-            # as `uv_write` should be called already.
-
-            if not all_sent:
-                # If not all of the data was sent successfully,
-                # we might need to pause the protocol.
-                self._maybe_pause_protocol()
-
-        elif self._buffer_size > 0:
-            self._maybe_pause_protocol()
-            self._loop._queue_write(self)
-
-    cdef inline _exec_write(self):
-        cdef:
-            int err
-            int buf_len
-            _StreamWriteContext ctx = None
-
-        if self._closed:
-            # If the handle is closed, just return, it's too
-            # late to do anything.
-            return
-
-        buf_len = len(self._buffer)
-        if not buf_len:
-            return
-
-        if (<uv.uv_stream_t*>self._handle).write_queue_size == 0:
-            # libuv internal write buffers for this stream are empty.
-            if buf_len == 1:
-                # If we only have one piece of data to send, let's
-                # use our fast implementation of try_write.
-                data = self._buffer[0]
-                sent = self._try_write(data)
-
-                if sent is None:
-                    # A `self._fatal_error` was called.
-                    # It might not raise an exception under some
-                    # conditions.
-                    self._buffer_size = 0
-                    self._buffer.clear()
-                    if not self._closing:
-                        # This should never happen.
-                        raise RuntimeError(
-                            'stream is open after UVStream._try_write '
-                            'returned None')
-                    return
-
-                if sent == 0:
-                    # All data was successfully written.
-                    self._buffer_size = 0
-                    self._buffer.clear()
-                    # on_write will call "maybe_resume_protocol".
-                    self._on_write()
-                    return True
-
-                if sent > 0:
-                    if UVLOOP_DEBUG:
-                        if sent == len(data):
-                            raise RuntimeError(
-                                '_try_write sent all data and returned '
-                                'non-zero')
-
-                    if PyBytes_CheckExact(data):
-                        # Cast bytes to memoryview to avoid copying
-                        # data that wasn't sent.
-                        data = memoryview(data)
-                    data = data[sent:]
-
-                    self._buffer_size -= sent
-                    self._buffer[0] = data
-
-                # At this point it's either data was sent partially,
-                # or an EAGAIN has happened.
-
-            else:
-                ctx = _StreamWriteContext.new(self, self._buffer)
-
-                err = uv.uv_try_write(<uv.uv_stream_t*>self._handle,
-                                      ctx.uv_bufs_start,
-                                      ctx.uv_bufs_len)
-
-                if err > 0:
-                    # Some data was successfully sent.
-
-                    if <size_t>err == self._buffer_size:
-                        # Everything was sent.
-                        ctx.close()
-                        self._buffer.clear()
-                        self._buffer_size = 0
-                        # on_write will call "maybe_resume_protocol".
-                        self._on_write()
-                        return True
-
-                    try:
-                        # Advance pointers to uv_bufs in `ctx`,
-                        # we will reuse it soon for a uv_write
-                        # call.
-                        ctx.advance_uv_buf(<ssize_t>err)
-                    except Exception as ex:  # This should never happen.
-                        # Let's try to close the `ctx` anyways.
-                        ctx.close()
-                        self._fatal_error(ex, True)
-                        self._buffer.clear()
-                        self._buffer_size = 0
-                        return
-
-                elif err != uv.UV_EAGAIN:
-                    ctx.close()
-                    exc = convert_error(err)
-                    self._fatal_error(exc, True)
-                    self._buffer.clear()
-                    self._buffer_size = 0
-                    return
-
-                # fall through
-
-        if ctx is None:
-            ctx = _StreamWriteContext.new(self, self._buffer)
-
-        err = uv.uv_write(&ctx.req,
-                          <uv.uv_stream_t*>self._handle,
-                          ctx.uv_bufs_start,
-                          ctx.uv_bufs_len,
-                          __uv_stream_on_write)
-
-        self._buffer_size = 0
-        # Can't use `_buffer.clear()` here: `ctx` holds a reference to
-        # the `_buffer`.
-        self._buffer = []
-
-        if err < 0:
-            # close write context
-            ctx.close()
-
-            exc = convert_error(err)
-            self._fatal_error(exc, True)
-            return
-
-        self._maybe_resume_protocol()
-
-    cdef size_t _get_write_buffer_size(self):
-        if self._handle is NULL:
-            return 0
-        return ((<uv.uv_stream_t*>self._handle).write_queue_size +
-                self._buffer_size)
-
-    cdef _close(self):
-        try:
-            if self._read_pybuf_acquired:
-                # Should never happen. libuv always calls uv_alloc/uv_read
-                # in pairs.
-                self._loop.call_exception_handler({
-                    'transport': self,
-                    'message': 'XXX: an allocated buffer in transport._close()'
-                })
-                self._read_pybuf_acquired = 0
-                PyBuffer_Release(&self._read_pybuf)
-
-            self._stop_reading()
-        finally:
-            UVSocketHandle._close(<UVHandle>self)
-
-    cdef inline _on_accept(self):
-        # Ultimately called by __uv_stream_on_listen.
-        self._init_protocol()
-
-    cdef inline _on_eof(self):
-        # Any exception raised here will be caught in
-        # __uv_stream_on_read.
-
-        try:
-            meth = self._protocol.eof_received
-        except AttributeError:
-            keep_open = False
-        else:
-            keep_open = run_in_context(self.context, meth)
-
-        if keep_open:
-            # We're keeping the connection open so the
-            # protocol can write more, but we still can't
-            # receive more, so remove the reader callback.
-            self._stop_reading()
-        else:
-            self.close()
-
-    cdef inline _on_write(self):
-        self._maybe_resume_protocol()
-        if not self._get_write_buffer_size():
-            if self._closing:
-                self._schedule_call_connection_lost(None)
-            elif self._eof:
-                self._shutdown()
-
-    cdef inline _init(self, Loop loop, object protocol, Server server,
-                      object waiter, object context):
-        self.context = context
-        self._set_protocol(protocol)
-        self._start_init(loop)
-
-        if server is not None:
-            self._set_server(server)
-
-        if waiter is not None:
-            self._set_waiter(waiter)
-
-    cdef inline _on_connect(self, object exc):
-        # Called from __tcp_connect_callback (tcp.pyx) and
-        # __pipe_connect_callback (pipe.pyx).
-        if exc is None:
-            self._init_protocol()
-        else:
-            if self._waiter is None:
-                self._fatal_error(exc, False, "connect failed")
-            elif self._waiter.cancelled():
-                # Connect call was cancelled; just close the transport
-                # silently.
-                self._close()
-            elif self._waiter.done():
-                self._fatal_error(exc, False, "connect failed")
-            else:
-                self._waiter.set_exception(exc)
-                self._close()
-
-    # === Public API ===
-
-    def __repr__(self):
-        return '<{} closed={} reading={} {:#x}>'.format(
-            self.__class__.__name__,
-            self._closed,
-            self.__reading,
-            id(self))
-
-    def write(self, object buf):
-        self._ensure_alive()
-
-        if self._eof:
-            raise RuntimeError('Cannot call write() after write_eof()')
-        if not buf:
-            return
-        if self._conn_lost:
-            self._conn_lost += 1
-            return
-        self._buffer_write(buf)
-        self._initiate_write()
-
-    def writelines(self, bufs):
-        self._ensure_alive()
-
-        if self._eof:
-            raise RuntimeError('Cannot call writelines() after write_eof()')
-        if self._conn_lost:
-            self._conn_lost += 1
-            return
-        for buf in bufs:
-            self._buffer_write(buf)
-        self._initiate_write()
-
-    def write_eof(self):
-        self._ensure_alive()
-
-        if self._eof:
-            return
-
-        self._eof = 1
-        if not self._get_write_buffer_size():
-            self._shutdown()
-
-    def can_write_eof(self):
-        return True
-
-    def is_reading(self):
-        return self._is_reading()
-
-    def pause_reading(self):
-        if self._closing or not self._is_reading():
-            return
-        self._stop_reading()
-
-    def resume_reading(self):
-        if self._is_reading() or self._closing:
-            return
-        self._start_reading()
-
-
-cdef void __uv_stream_on_shutdown(uv.uv_shutdown_t* req,
-                                  int status) noexcept with gil:
-
-    # callback for uv_shutdown
-
-    if req.data is NULL:
-        aio_logger.error(
-            'UVStream.shutdown callback called with NULL req.data, status=%r',
-            status)
-        return
-
-    cdef UVStream stream = <UVStream> req.data
-
-    if status < 0 and status != uv.UV_ECANCELED:
-        # From libuv source code:
-        #     The ECANCELED error code is a lie, the shutdown(2) syscall is a
-        #     fait accompli at this point. Maybe we should revisit this in
-        #     v0.11.  A possible reason for leaving it unchanged is that it
-        #     informs the callee that the handle has been destroyed.
-
-        if UVLOOP_DEBUG:
-            stream._loop._debug_stream_shutdown_errors_total += 1
-
-        exc = convert_error(status)
-        stream._fatal_error(
-            exc, False, "error status in uv_stream_t.shutdown callback")
-        return
-
-
-cdef inline bint __uv_stream_on_read_common(
-    UVStream sc,
-    Loop loop,
-    ssize_t nread,
-):
-    if sc._closed:
-        # The stream was closed, there is no reason to
-        # do any work now.
-        sc.__reading_stopped()  # Just in case.
-        return True
-
-    if nread == uv.UV_EOF:
-        # From libuv docs:
-        #     The callee is responsible for stopping closing the stream
-        #     when an error happens by calling uv_read_stop() or uv_close().
-        #     Trying to read from the stream again is undefined.
-        try:
-            if UVLOOP_DEBUG:
-                loop._debug_stream_read_eof_total += 1
-
-            sc._stop_reading()
-            sc._on_eof()
-        except BaseException as ex:
-            if UVLOOP_DEBUG:
-                loop._debug_stream_read_eof_cb_errors_total += 1
-
-            sc._fatal_error(ex, False)
-        finally:
-            return True
-
-    if nread == 0:
-        # From libuv docs:
-        #     nread might be 0, which does not indicate an error or EOF.
-        #     This is equivalent to EAGAIN or EWOULDBLOCK under read(2).
-        return True
-
-    if nread < 0:
-        # From libuv docs:
-        #     The callee is responsible for stopping closing the stream
-        #     when an error happens by calling uv_read_stop() or uv_close().
-        #     Trying to read from the stream again is undefined.
-        #
-        # Therefore, we're closing the stream.  Since "UVHandle._close()"
-        # doesn't raise exceptions unless uvloop is built with DEBUG=1,
-        # we don't need try...finally here.
-
-        if UVLOOP_DEBUG:
-            loop._debug_stream_read_errors_total += 1
-
-        if sc.__read_error_close:
-            # Used for getting notified when a pipe is closed.
-            # See WriteUnixTransport for the explanation.
-            sc._on_eof()
-            return True
-
-        exc = convert_error(nread)
-        sc._fatal_error(
-            exc, False, "error status in uv_stream_t.read callback")
-        return True
-
-    return False
-
-
-cdef inline void __uv_stream_on_read_impl(
-    uv.uv_stream_t* stream,
-    ssize_t nread,
-    const uv.uv_buf_t* buf,
-):
-    cdef:
-        UVStream sc = <UVStream>stream.data
-        Loop loop = sc._loop
-
-    # It's OK to free the buffer early, since nothing will
-    # be able to touch it until this method is done.
-    __loop_free_buffer(loop)
-
-    if __uv_stream_on_read_common(sc, loop, nread):
-        return
-
-    try:
-        if UVLOOP_DEBUG:
-            loop._debug_stream_read_cb_total += 1
-
-        run_in_context1(
-            sc.context,
-            sc._protocol_data_received,
-            loop._recv_buffer[:nread],
-        )
-    except BaseException as exc:
-        if UVLOOP_DEBUG:
-            loop._debug_stream_read_cb_errors_total += 1
-
-        sc._fatal_error(exc, False)
-
-
-cdef inline void __uv_stream_on_write_impl(
-    uv.uv_write_t* req,
-    int status,
-):
-    cdef:
-        _StreamWriteContext ctx = <_StreamWriteContext> req.data
-        UVStream stream = <UVStream>ctx.stream
-
-    ctx.close()
-
-    if stream._closed:
-        # The stream was closed, there is nothing to do.
-        # Even if there is an error, like EPIPE, there
-        # is no reason to report it.
-        return
-
-    if status < 0:
-        if UVLOOP_DEBUG:
-            stream._loop._debug_stream_write_errors_total += 1
-
-        exc = convert_error(status)
-        stream._fatal_error(
-            exc, False, "error status in uv_stream_t.write callback")
-        return
-
-    try:
-        stream._on_write()
-    except BaseException as exc:
-        if UVLOOP_DEBUG:
-            stream._loop._debug_stream_write_cb_errors_total += 1
-
-        stream._fatal_error(exc, False)
-
-
-cdef void __uv_stream_on_read(
-    uv.uv_stream_t* stream,
-    ssize_t nread,
-    const uv.uv_buf_t* buf,
-) noexcept with gil:
-
-    if __ensure_handle_data(<uv.uv_handle_t*>stream,
-                            "UVStream read callback") == 0:
-        return
-
-    # Don't need try-finally, __uv_stream_on_read_impl is void
-    __uv_stream_on_read_impl(stream, nread, buf)
-
-
-cdef void __uv_stream_on_write(
-    uv.uv_write_t* req,
-    int status,
-) noexcept with gil:
-
-    if UVLOOP_DEBUG:
-        if req.data is NULL:
-            aio_logger.error(
-                'UVStream.write callback called with NULL req.data, status=%r',
-                status)
-            return
-
-    # Don't need try-finally, __uv_stream_on_write_impl is void
-    __uv_stream_on_write_impl(req, status)
-
-
-cdef void __uv_stream_buffered_alloc(
-    uv.uv_handle_t* stream,
-    size_t suggested_size,
-    uv.uv_buf_t* uvbuf,
-) noexcept with gil:
-
-    if __ensure_handle_data(<uv.uv_handle_t*>stream,
-                            "UVStream alloc buffer callback") == 0:
-        return
-
-    cdef:
-        UVStream sc = <UVStream>stream.data
-        Loop loop = sc._loop
-        Py_buffer* pybuf = &sc._read_pybuf
-        int got_buf = 0
-
-    if sc._read_pybuf_acquired:
-        uvbuf.len = 0
-        uvbuf.base = NULL
-        return
-
-    sc._read_pybuf_acquired = 0
-    try:
-        buf = run_in_context1(
-            sc.context,
-            sc._protocol_get_buffer,
-            suggested_size,
-        )
-        PyObject_GetBuffer(buf, pybuf, PyBUF_WRITABLE)
-        got_buf = 1
-    except BaseException as exc:
-        # Can't call 'sc._fatal_error' or 'sc._close', libuv will SF.
-        # We'll do it later in __uv_stream_buffered_on_read when we
-        # receive UV_ENOBUFS.
-        uvbuf.len = 0
-        uvbuf.base = NULL
-        return
-
-    if not pybuf.len:
-        uvbuf.len = 0
-        uvbuf.base = NULL
-        if got_buf:
-            PyBuffer_Release(pybuf)
-        return
-
-    sc._read_pybuf_acquired = 1
-    uvbuf.base = <char*>pybuf.buf
-    uvbuf.len = pybuf.len
-
-
-cdef void __uv_stream_buffered_on_read(
-    uv.uv_stream_t* stream,
-    ssize_t nread,
-    const uv.uv_buf_t* buf,
-) noexcept with gil:
-
-    if __ensure_handle_data(<uv.uv_handle_t*>stream,
-                            "UVStream buffered read callback") == 0:
-        return
-
-    cdef:
-        UVStream sc = <UVStream>stream.data
-        Loop loop = sc._loop
-        Py_buffer* pybuf = &sc._read_pybuf
-
-    if nread == uv.UV_ENOBUFS:
-        sc._fatal_error(
-            RuntimeError(
-                'unhandled error (or an empty buffer) in get_buffer()'),
-            False)
-        return
-
-    try:
-        if nread > 0 and not sc._read_pybuf_acquired:
-            # From libuv docs:
-            #     nread is > 0 if there is data available or < 0 on error. When
-            #     we’ve reached EOF, nread will be set to UV_EOF. When
-            #     nread < 0, the buf parameter might not point to a valid
-            #     buffer; in that case buf.len and buf.base are both set to 0.
-            raise RuntimeError(
-                f'no python buffer is allocated in on_read; nread={nread}')
-
-        if nread == 0:
-            # From libuv docs:
-            #     nread might be 0, which does not indicate an error or EOF.
-            #     This is equivalent to EAGAIN or EWOULDBLOCK under read(2).
-            return
-
-        if __uv_stream_on_read_common(sc, loop, nread):
-            return
-
-        if UVLOOP_DEBUG:
-            loop._debug_stream_read_cb_total += 1
-
-        run_in_context1(sc.context, sc._protocol_buffer_updated, nread)
-    except BaseException as exc:
-        if UVLOOP_DEBUG:
-            loop._debug_stream_read_cb_errors_total += 1
-
-        sc._fatal_error(exc, False)
-    finally:
-        sc._read_pybuf_acquired = 0
-        PyBuffer_Release(pybuf)