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Merge branch 'tsan-warnings'

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Fix a harmless warning from thread sanitizer and make wxAtomicInc() more
useful.

See #22417.
This commit is contained in:
Vadim Zeitlin 2022-05-11 02:37:26 +02:00
commit a7eee933c6
6 changed files with 72 additions and 107 deletions
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9
configure vendored
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@ -25176,8 +25176,8 @@ fi
if test -n "$GCC"; then
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for __sync_fetch_and_add and __sync_sub_and_fetch builtins" >&5
$as_echo_n "checking for __sync_fetch_and_add and __sync_sub_and_fetch builtins... " >&6; }
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for __sync_xxx_and_fetch builtins" >&5
$as_echo_n "checking for __sync_xxx_and_fetch builtins... " >&6; }
if ${wx_cv_cc_gcc_atomic_builtins+:} false; then :
$as_echo_n "(cached) " >&6
else
@ -25190,10 +25190,7 @@ main ()
{
unsigned int value=0;
/* wxAtomicInc doesn't use return value here */
__sync_fetch_and_add(&value, 2);
__sync_sub_and_fetch(&value, 1);
/* but wxAtomicDec does, so mimic that: */
volatile unsigned int r1 = __sync_add_and_fetch(&value, 2);
volatile unsigned int r2 = __sync_sub_and_fetch(&value, 1);
;