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Rewrite Windows console input handling

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This change removes our use of ENABLE_VIRTUAL_TERMINAL_INPUT (which
isn't very good) in favor of having read() translate Windows Console
input events to ANSI/XTERM sequences by hand. This makes it possible to
capture important keystrokes (e.g. ctrl-space) that weren't possible
before. Most importantly this change also removes the stdin/sigwinch
worker threads, which never really worked that well. Interactive TTY
sessions will now work reliably when a Cosmo process spawns or forks
another Cosmo process, e.g. unbourne.com launching emacs.com.
This commit is contained in:
Justine Tunney 2023-09-19 11:42:38 -07:00
parent ececec4c94
commit d6c2830850
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GPG key ID: BE714B4575D6E328
27 changed files with 635 additions and 464 deletions
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11
libc/calls/sig.c
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@ -160,13 +160,12 @@ textwindows int __sig_raise(int sig, int sic) {
return (flags & SA_RESTART) ? 2 : 1;
}
textwindows void __sig_cancel(struct PosixThread *pt, unsigned flags) {
textwindows void __sig_cancel(struct PosixThread *pt) {
atomic_int *futex;
if (_weaken(WakeByAddressSingle) &&
(futex = atomic_load_explicit(&pt->pt_futex, memory_order_acquire))) {
_weaken(WakeByAddressSingle)(futex);
} else if (!(flags & SA_RESTART) && pt->iohandle > 0) {
pt->abort_errno = EINTR;
} else if (pt->iohandle > 0) {
if (!CancelIoEx(pt->iohandle, pt->ioverlap)) {
int err = GetLastError();
if (err != kNtErrorNotFound) {
@ -174,7 +173,6 @@ textwindows void __sig_cancel(struct PosixThread *pt, unsigned flags) {
}
}
} else if (pt->pt_flags & PT_INSEMAPHORE) {
pt->abort_errno = EINTR;
if (!ReleaseSemaphore(pt->semaphore, 1, 0)) {
STRACE("ReleaseSemaphore() failed w/ %d", GetLastError());
}
@ -259,8 +257,9 @@ static textwindows int __sig_killer(struct PosixThread *pt, int sig, int sic) {
STRACE("SetThreadContext failed w/ %d", GetLastError());
return ESRCH;
}
ResumeThread(th); // doesn't actually resume if doing blocking i/o
__sig_cancel(pt, flags); // we can wake it up immediately by canceling it
ResumeThread(th); // doesn't actually resume if doing blocking i/o
pt->abort_errno = EINTR;
__sig_cancel(pt); // we can wake it up immediately by canceling it
return 0;
}