pollableStreamRead

ptrdiff_t pollableStreamRead(gio.input_stream.InputStream stream,  ubyte[]  buffer,  bool  blocking,  gio.cancellable.Cancellable cancellable =  null)

Tries to read from stream, as with [gio.input_stream.InputStream.read] (if blocking is true) or [gio.pollable_input_stream.PollableInputStream.readNonblocking] (if blocking is false). This can be used to more easily share code between blocking and non-blocking implementations of a method.

If blocking is false, then stream must be a #GPollableInputStream for which [gio.pollable_input_stream.PollableInputStream.canPoll] returns true, or else the behavior is undefined. If blocking is true, then stream does not need to be a #GPollableInputStream.

Parameters

`stream`	a #GInputStream
`buffer`	a buffer to read data into
`blocking`	whether to do blocking I/O
`cancellable`	optional #GCancellable object, null to ignore.

Returns

the number of bytes read, or -1 on error.

Throws

[ErrorWrap]