Re: export _mouse_fd for select(2)

[Thomas Dickey]

On Tue, Jun 25, 2019 at 08:34:33AM +0000, address@hidden wrote:
> Currently, one can include STDIN_FILENO in a select(2), and then call getch()
> if input is available on stdin.  This allows for a main loop that also wait
> on other file descriptors, signals and a timeout.  Unfortunataly, the mouse
> cannot be included in this select because the _mouse_fd field of the SCREEN
> structure is private. 
> 
> A workaroud is to have a thread call getch() in blocking mode and then serve
> the result on a pipe whose other end goes in the select.  But this solution
> seems awkward to me, especially considering that STDIN_FILENO is instead
> always available to the application, and compared with having a function like
> getmousefd() that returns _mouse_fd. 
> 
> This function would be similar to ConnectionNumber(Display *) in XWindow:  it
> returns a file descriptor to be used in a select, so that the application may
> then call XNextEvent() or similar if something can be read there.  I believe
> it is not supposed to be used in any other way. 

_mouse_fd is only used for the GPM dependency, which is rarely used...

-- 
Thomas E. Dickey <address@hidden>
https://invisible-island.net
ftp://ftp.invisible-island.net

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