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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GPG key ID: BE714B4575D6E328
22 changed files with 302 additions and 62 deletions

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@ -120,8 +120,6 @@ void OnSig(int sig) {
}
TEST(popen, complicated) {
if (IsWindows())
return; // windows treats sigusr1 as terminate
char cmd[64];
signal(SIGUSR1, OnSig);
sprintf(cmd, "read a ; test \"x$a\" = xhello && kill -USR1 %d", getpid());