Commits on Mar 15, 2024

1. bootloader: Windows: shorten the duration of spinning-wheel cursor …

   When using windowed/noconsole mode, attempt to shorten the duration
   of the spinning-wheel cursor that Windows uses to indicate that the
   process is starting.
   
   For programs using `/SUBSYSTEM:WINDOWS`, Windows displays the
   spinning wheel cursor for a fixed amount of time, or until the
   process makes use of UI functions (creates a window, uses message
   queue).
   
   In PyInstaller onefile applications, the parent process displays
   a window only if splash screen is used. Therefore, the spinning
   wheel cursor might be still shown well after the child process
   displays its UI. To prevent this, post and receive a message
   using message queue, which apparently suffices to convince Windows
   that the process is alive. Do this right before we spawn the child
   process, i.e., after the parent process finishes unpacking the
   program; this is to ensure that the spinning-wheel cursor is
   displayed for the whole duration of unpacking.
   
   In onedir applications, the spinning wheel should generally not
   be an issue (as there is only one process), except for
   background-style applications that do not display any UI. Such
   progams will appear to start faster if we have Windows hide
   the spinning-wheel cursor before we launch the python
   interpreter. So add calls using message queue in that codepath
   as well.
   
   We use the same combination of `PostMessage` and `GetMessage`
   that can also be found in python executable:
   https://github.com/python/cpython/blob/v3.12.2/PC/launcher.c#L765-L779

   

   rokm committed Mar 15, 2024
   Configuration menu

   • View commit details
   • Copy full SHA for 1a9d91e
   • Browse repository at this point

   Copy the full SHA

   1a9d91e View commit details

   Browse the repository at this point in the history