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Introduce interprocess signaling on Windows

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This change gets rsync working without any warning or errors. On Windows
we now create a bunch of C:\var\sig\x\y.pid shared memory files, so sigs
can be delivered between processes. WinMain() creates this file when the
process starts. If the program links signaling system calls then we make
a thread at startup too, which allows asynchronous delivery each quantum
and cancelation points can spot these signals potentially faster on wait

See #1240
This commit is contained in:
Justine Tunney 2024-09-19 03:02:13 -07:00
parent 8527462b95
commit 0d74673213
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GPG key ID: BE714B4575D6E328
22 changed files with 302 additions and 62 deletions
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2
libc/calls/sigpending.c
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@ -53,7 +53,7 @@ int sigpending(sigset_t *pending) {
}
rc = 0;
} else if (IsWindows()) {
*pending = atomic_load_explicit(&__sig.pending, memory_order_acquire) |
*pending = atomic_load_explicit(__sig.process, memory_order_acquire) |
atomic_load_explicit(&__get_tls()->tib_sigpending,
memory_order_acquire);
rc = 0;