Checks if stream can be read.
Note that some stream types may not be able to implement this 100% reliably, and it is possible that a call to gio.input_stream.InputStream.read after this returns true would still block. To guarantee non-blocking behavior, you should always use gio.pollable_input_stream.PollableInputStream.readNonblocking, which will return a gio.types.IOErrorEnum.WouldBlock error rather than blocking.
The behaviour of this method is undefined if gio.pollable_input_stream.PollableInputStream.canPoll returns false for stream.
true if stream is readable, false if not. If an error has occurred on stream, this will result in gio.pollable_input_stream.PollableInputStream.isReadable returning true, and the next attempt to read will return the error.
Checks if stream can be read.
Note that some stream types may not be able to implement this 100% reliably, and it is possible that a call to gio.input_stream.InputStream.read after this returns true would still block. To guarantee non-blocking behavior, you should always use gio.pollable_input_stream.PollableInputStream.readNonblocking, which will return a gio.types.IOErrorEnum.WouldBlock error rather than blocking.
The behaviour of this method is undefined if gio.pollable_input_stream.PollableInputStream.canPoll returns false for stream.