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Normally, the GTK code runs toplevel callbacks from a GTK 'idle function'. But those mean what they say: they are considered low-priority, to be run _only_ when the system is idle - so they can fail to run at all in conditions of a steady stream of higher-priority things, e.g. something is throwing data at the application so fast that every main-loop iteration finds a readable fd. And that's not good, because _we_ don't think our callbacks are low-priority: they do a lot of really important work like redrawing the window. So if they never get round to happening, PuTTY or pterm can appear to lock up. Simple solution to that one: whenever we process a select notification on any fd, we _also_ call run_toplevel_callbacks(). Then our callbacks are bound to happen reasonably regularly.
This is the README for PuTTY, a free Windows and Unix Telnet and SSH
client.
PuTTY is built using CMake <https://cmake.org/>. To compile in the
simplest way (on any of Linux, Windows or Mac), run these commands in
the source directory:
cmake .
cmake --build .
Documentation (in various formats including Windows Help and Unix
`man' pages) is built from the Halibut (`.but') files in the `doc'
subdirectory using `doc/Makefile'. If you aren't using one of our
source snapshots, you'll need to do this yourself. Halibut can be
found at <https://www.chiark.greenend.org.uk/~sgtatham/halibut/>.
The PuTTY home web site is
https://www.chiark.greenend.org.uk/~sgtatham/putty/
If you want to send bug reports or feature requests, please read the
Feedback section of the web site before doing so. Sending one-line
reports saying `it doesn't work' will waste your time as much as
ours.
See the file LICENCE for the licence conditions.