Zhiyi Zhang : uxtheme: Save temporary system metrics to a struct in memory.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: aefcd057b1a85c159b1e3bdc2bb6f77f9d77f670
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=aefcd057b1a85c159b1e3bdc2bb6f77f9d77f670

Author: Zhiyi Zhang <zzhang at codeweavers.com>
Date:   Thu Oct 21 10:06:16 2021 +0800

uxtheme: Save temporary system metrics to a struct in memory.

So that temporary system metrics are not saved in the registry. Saving
them to the registry creates a race condition when two processes are
trying to activate theming at the same time, one process might save
themed system metrics instead of unthemed system metrics to the registry.
The race condition will be more apparent when initializing a wine prefix
after theming is turned on by default in wine.inf.

This patch refactors the system metric helper functions to use an
in-memory struct and is a prerequisite to remove the race condition.

Signed-off-by: Zhiyi Zhang <zzhang at codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard at winehq.org>

---

 dlls/uxtheme/system.c | 340 +++++++++++++++++++++++---------------------------
 1 file changed, 159 insertions(+), 181 deletions(-)

Diff:   https://source.winehq.org/git/wine.git/?a=commitdiff;h=aefcd057b1a85c159b1e3bdc2bb6f77f9d77f670