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use atomic bts for mutex in sys_background from Maxis

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git-svn-id: svn://kolibrios.org@1071 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
Evgeny Grechnikov (Diamond) 2009-05-16 09:57:16 +00:00
parent 944bcba007
commit be9e2b43f3
1 changed files with 8 additions and 9 deletions
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17
kernel/trunk/kernel.asm
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@ -2254,8 +2254,9 @@ sys_cachetodiskette:
uglobal uglobal
; bgrchanged dd 0x0 ; bgrchanged dd 0x0
bgrlock db 0 align 4
bgrlockpid dd 0 bgrlockpid dd 0
bgrlock db 0
endg endg
sys_background: sys_background:
@ -2267,10 +2268,9 @@ sys_background:
cmp edx,0 cmp edx,0
je sbgrr je sbgrr
@@: @@:
mov al, 1 ;;Maxis use atomic bts for mutexes 4.4.2009
xchg [bgrlock], al bts dword [bgrlock], 0
test al, al jnc @f
jz @f
call change_task call change_task
jmp @b jmp @b
@@: @@:
@ -2368,11 +2368,10 @@ draw_background_temp:
cmp ebx, 6 cmp ebx, 6
jnz nosb6 jnz nosb6
;;Maxis use atomic bts for mutex 4.4.2009
@@: @@:
mov al, 1 bts [bgrlock], 0
xchg [bgrlock], al jnc @f
test al, al
jz @f
call change_task call change_task
jmp @b jmp @b
@@: @@: