ntdll: Call usleep() instead of NtYieldExecution() in NtDelayExecution().

This implements the general fix from b1a79c6b (in particular, making sure that Sleep(0) will not immediately resume execution of the thread if there are no other runnable threads) while preserving the existing behavior of NtYieldExecution() / SwitchToThread(). Thanks Rémi for the idea. Signed-off-by: Matteo Bruni <mbruni@codeweavers.com> Signed-off-by: Alexandre Julliard <julliard@winehq.org>

ntdll: Call usleep() instead of NtYieldExecution() in NtDelayExecution().
e86b4015 · Matteo Bruni · Alexandre Julliard · 3203f056 · e86b4015
Commit e86b4015 authored Nov 19, 2021 by Matteo Bruni Committed by Alexandre Julliard Nov 22, 2021
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sync.c dlls/ntdll/unix/sync.c +1 -1

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--- a/dlls/ntdll/unix/sync.c
+++ b/dlls/ntdll/unix/sync.c
@@ -1480,7 +1480,7 @@ NTSTATUS WINAPI NtDelayExecution( BOOLEAN alertable, const LARGE_INTEGER *timeou
        }

        /* Note that we yield after establishing the desired timeout */
-        NtYieldExecution();
+        usleep(0);
        if (!when) return STATUS_SUCCESS;

        for (;;)