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Put more thought into i/o polyfills

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wait4() is now solid enough to run `make -j100` on Windows. You can now
use MSG_DONTWAIT on Windows. There was a handle leak in accept() that's
been fixed. Our WIN32 overlapped i/o code has been simplified. Priority
class now inherits into subprocesses, so the verynice command will work
and the signal mask will now be inherited by execve() and posix_spawn()
This commit is contained in:
Justine Tunney 2023-11-06 16:38:44 -08:00
parent 736fdb757a
commit e961385e55
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GPG key ID: BE714B4575D6E328
52 changed files with 679 additions and 487 deletions
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11
libc/calls/park.c
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@ -32,11 +32,7 @@ static textwindows int _park_thread(uint32_t msdelay, sigset_t waitmask,
bool restartable) {
int sig;
if (_check_cancel() == -1) return -1;
if ((sig = __sig_get(waitmask))) {
int handler_was_called = __sig_relay(sig, SI_KERNEL, waitmask);
if (_check_cancel() == -1) return -1;
if (!restartable || handler_was_called == 1) return eintr();
}
if ((sig = __sig_get(waitmask))) goto HandleSignal;
int expect = 0;
atomic_int futex = 0;
struct PosixThread *pt = _pthread_self();
@ -45,9 +41,12 @@ static textwindows int _park_thread(uint32_t msdelay, sigset_t waitmask,
bool32 ok = WaitOnAddress(&futex, &expect, sizeof(int), msdelay);
atomic_store_explicit(&pt->pt_blocker, 0, memory_order_release);
if (ok && (sig = __sig_get(waitmask))) {
HandleSignal:
int handler_was_called = __sig_relay(sig, SI_KERNEL, waitmask);
if (_check_cancel() == -1) return -1;
if (!restartable || handler_was_called == 1) return eintr();
if (!restartable || (handler_was_called & SIG_HANDLED_NO_RESTART)) {
return eintr();
}
}
return 0;
}