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Further optimize poll() on Windows

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Justine Tunney 2024-09-22 22:24:56 -07:00
parent 556a294363
commit 518eabadf5
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GPG key ID: BE714B4575D6E328
6 changed files with 44 additions and 64 deletions
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13
libc/proc/proc.c
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@ -102,14 +102,14 @@ textwindows int __proc_harvest(struct Proc *pr, bool iswait4) {
pr->handle = status & 0x00FFFFFF;
} else {
// handle child _Exit()
if (status == 0xc9af3d51u) {
if (status == 0xc9af3d51u)
status = kNtStillActive;
}
pr->wstatus = status;
if (!iswait4 && !pr->waiters && !__proc.waiters &&
(__sighandrvas[SIGCHLD] == (uintptr_t)SIG_IGN ||
(__sighandflags[SIGCHLD] & SA_NOCLDWAIT))) {
// perform automatic zombie reaping
STRACE("automatically reaping zombie");
dll_remove(&__proc.list, &pr->elem);
dll_make_first(&__proc.free, &pr->elem);
CloseHandle(pr->handle);
@ -192,9 +192,8 @@ static textwindows dontinstrument uint32_t __proc_worker(void *arg) {
continue;
if (j == i)
continue;
if (!--objects[j]->waiters && objects[j]->status == PROC_UNDEAD) {
if (!--objects[j]->waiters && objects[j]->status == PROC_UNDEAD)
__proc_free(objects[j]);
}
}
// check if we need to churn due to >64 processes
@ -219,9 +218,8 @@ static textwindows dontinstrument uint32_t __proc_worker(void *arg) {
case PROC_ZOMBIE:
break;
case PROC_UNDEAD:
if (!objects[i]->waiters) {
if (!objects[i]->waiters)
__proc_free(objects[i]);
}
break;
default:
__builtin_unreachable();
@ -233,9 +231,8 @@ static textwindows dontinstrument uint32_t __proc_worker(void *arg) {
// 1. wait4() is being used
// 2. SIGCHLD has SIG_IGN handler
// 3. SIGCHLD has SA_NOCLDWAIT flag
if (sic) {
if (sic)
__sig_generate(SIGCHLD, sic);
}
}
return 0;
}