Re: [PATCH v5 00/13] Improve futex usage

[Paolo Bonzini <pbonzini@redhat.com>]

From: Akihiko Odaki <akihiko.odaki@daynix.com>

> In a recent discussion, Phil Dennis-Jordan pointed out a quirk in
> QemuEvent destruction due to futex-like abstraction, which prevented
> the usage of QemuEvent in new and existing code[1]. With some more
> thoughts after this discussion, I also found other problem and room
> of improvement in futex usage. Here is a stack of patches to resolve
> them.

Thanks.  I haven't had the time to go through the final two patches,
so I took the current Linux code unmodified and added the non-Linux
changes on top.  But I have kept the delta locally and will get back
to it.

I also had to squash this in for CI to pass:

diff --git a/meson.build b/meson.build
index 20e8f37e6e7..34729c2a3dd 100644
--- a/meson.build
+++ b/meson.build
@@ -843,7 +843,12 @@ if host_os == 'windows'
   midl = find_program('midl', required: false)
   widl = find_program('widl', required: false)
   pathcch = cc.find_library('pathcch')
-  synchronization = cc.find_library('Synchronization')
+  synchronization = cc.find_library('Synchronization', required: false)
+  if not synchronization.found()
+    # The library name is lowercase on mingw
+    synchronization = cc.find_library('synchronization', required: true)
+  endif
+
   socket = cc.find_library('ws2_32')
   winmm = cc.find_library('winmm')

Paolo