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win32u: Use session BaseNamedObjects for display_device_init mutex.

Browse source 
The mutex is also used in user32, gdi32, and winevulkan, where it is
opened through kernel32, which opens it from the session directory.
This commit is contained in:
Rémi Bernon 2022-10-19 01:19:42 +02:00 committed by Alexandre Julliard
parent da4a45cdaf
commit 94ece19f8e
1 changed files with 7 additions and 5 deletions
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12
dlls/win32u/sysparams.c
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@ -406,14 +406,16 @@ void user_check_not_lock(void)
static HANDLE get_display_device_init_mutex( void )
{
static const WCHAR display_device_initW[] =
{'\\','B','a','s','e','N','a','m','e','d','O','b','j','e','c','t','s',
'\\','d','i','s','p','l','a','y','_','d','e','v','i','c','e','_','i','n','i','t'};
UNICODE_STRING name = { sizeof(display_device_initW), sizeof(display_device_initW),
(WCHAR *)display_device_initW };
WCHAR bufferW[256];
UNICODE_STRING name = {.Buffer = bufferW};
OBJECT_ATTRIBUTES attr;
char buffer[256];
HANDLE mutex;
snprintf( buffer, ARRAY_SIZE(buffer), "\\Sessions\\%u\\BaseNamedObjects\\display_device_init",
NtCurrentTeb()->Peb->SessionId );
name.Length = name.MaximumLength = asciiz_to_unicode( bufferW, buffer );
InitializeObjectAttributes( &attr, &name, OBJ_OPENIF, NULL, NULL );
if (NtCreateMutant( &mutex, MUTEX_ALL_ACCESS, &attr, FALSE ) < 0) return 0;
NtWaitForSingleObject( mutex, FALSE, NULL );