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ludic/changes/launcher-runtime.md
Orkuncakilkaya 43d5eb5b88 feat(launcher): Process.*, Http.save_to/received/expected, App.window_hide/show 
Process.spawn/poll/kill/free - non-blocking child processes with no shell: posix_spawn on
macOS (process.ll), CreateProcessW with MSVC-quoted arguments and no console window on
Windows (process_win.ll), linked only when a program uses Process.*.

Http.save_to streams a response body into a file (NSURLSession with a run-time delegate
class on macOS, the WinHTTP read loop on Windows); Http.received / Http.expected report
progress while it is pending. Freeing a pending request cancels it and parks the slot
until the worker has finished.

App.window_hide / App.window_show take the game's window off the screen and back without
closing it; the run goes on while hidden. Docs, examples, tests and a changeset.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
2026-09-17 13:32:23 +03:00

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bump: minor type: feat A launcher's runtime — start a program, step aside while it runs, and download large files with a progress bar.

  • Process.* — Process.spawn(path, args) starts a program directly (no shell) with this process's environment and working directory and returns at once; Process.poll(h) is -1 while it runs, then its exit code (128 + signal for a signal death, 137 after Process.kill); Process.free lets a handle go. posix_spawn on macOS (runtime/native/process.ll); CreateProcessW on Windows (process_win.ll), with each argument quoted by the MSVC rules and no console window. Linked only into a program that uses Process.*.
  • Http.save_to(h, path) — before Http.send, streams the response body straight into a file (written at path itself, created on send) instead of memory; Http.text of such a request is empty and Http.body_len is the bytes written. Http.received(h) and Http.expected(h) (the Content-Length, or -1) are live while it is pending. macOS streams through an NSURLSession with a delegate built at run time, Windows through the WinHTTP read loop. Freeing a pending request now cancels it and parks its slot until the worker has let go, rather than freeing what the worker is still writing.
  • App.window_hide() / App.window_show() — take the game's window off the screen and bring it back without closing it or its GL / Vulkan surface; the run goes on while it is hidden. No-ops headless and before there is a window.