Introduce interprocess signaling on Windows

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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22 changed files with 302 additions and 62 deletions

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@ -103,8 +103,6 @@ static void OnSigusr2(int sig) {
}
TEST(fork, childToChild) {
if (IsWindows())
return; // :'(
sigset_t mask, oldmask;
int ws, parent, child1, child2;
gotsigusr1 = false;