From 4a5679eb2c3e36feb5af04b717949e41ec4b5d91 Mon Sep 17 00:00:00 2001
From: midipix <writeonce@midipix.org>
Date: Thu, 3 Dec 2020 22:12:17 +0000
Subject: __ntapi_tt_fork_v1(): obtain atomic lock via loop as needed.
---
src/process/ntapi_tt_fork_v1.c | 13 +++++++++----
1 file changed, 9 insertions(+), 4 deletions(-)
(limited to 'src')
diff --git a/src/process/ntapi_tt_fork_v1.c b/src/process/ntapi_tt_fork_v1.c
index eeee49b..74e0b7e 100644
--- a/src/process/ntapi_tt_fork_v1.c
+++ b/src/process/ntapi_tt_fork_v1.c
@@ -166,15 +166,20 @@ intptr_t __fastcall __ntapi_tt_fork_v1(
timeout.quad = (-1) * 10 * 1000 * __NT_FORK_CHILD_WAIT_MILLISEC;
htty_connected = 0;
- if (at_locked_cas(&__internals->hlock,0,1))
- return (intptr_t)(-1);
+ while (at_locked_cas(&__internals->hlock,0,1))
+ __ntapi->zw_delay_execution(
+ NT_SYNC_NON_ALERTABLE,
+ &(nt_timeout){{0,0}});
- if (hport_session && *hport_session)
+ if (hport_session && *hport_session) {
if (__ntapi_tt_create_inheritable_event(
&htty_connected,
NT_NOTIFICATION_EVENT,
- NT_EVENT_NOT_SIGNALED))
+ NT_EVENT_NOT_SIGNALED)) {
+ at_store(&__internals->hlock,0);
return (intptr_t)(-1);
+ }
+ }
pid = __tt_fork_v1();
--
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