arnavbhatt288/kolibrios
1
0
Fork 0
forked from KolibriOS/kolibrios
Code Pull Requests Activity

kolibri-acpi: FUTEX_WAKE

Browse Source 
git-svn-id: svn://kolibrios.org@5590 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
Sergey Semyonov (Serge) 2015-07-20 19:48:12 +00:00
parent 2cfbdba0b0
commit 951d3fdb52
2 changed files with 60 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

60
kernel/branches/Kolibri-acpi/core/memory.inc
View File

@ -1481,6 +1481,8 @@ align 4
ret
align 4
;ecx futex handle
;edx new value
.futex_wait:
cmp ecx, 3
jb .epicfail
@ -1496,12 +1498,13 @@ align 4
jne .epicfail
mov ecx, [edi+FUTEX.pointer]
mov edx, 1
mov eax, [ecx]
test eax, eax
jnz .wait_slow
lock cmpxchg [ecx], edx
jz .ok
mov eax, edx
lock cmpxchg [ecx], edx ;wait until old_value == new_value
jz .wait_slow
mov [esp+SYSCALL_STACK._eax], 0
ret
.wait_slow:
pushfd
@ -1518,25 +1521,56 @@ align 4
.again:
call change_task
mov eax, [ecx]
test eax, eax
jnz .again
lock cmpxchg [ecx], edx
jnz .again
jz .again
list_del esp
add esp, sizeof.MUTEX_WAITER
popfd
.ok:
mov [esp+32], eax
mov [esp+SYSCALL_STACK._eax], 0
ret
.epicfail:
mov [esp+32], dword -1
mov [esp+SYSCALL_STACK._eax], -1
ret
align 4
.futex_wake:
cmp ecx, 3
jb .epicfail
cmp ecx, (PROC.pdt_0 - PROC.htab)/4
jae .epicfail
mov esi, [current_process]
mov edi, [esi+PROC.htab+ecx*4]
cmp [edi+FUTEX.magic], 'FUTX'
jne .epicfail
cmp [edi+FUTEX.handle], ecx
jne .epicfail
xor ecx, ecx
pushfd
cli
lea ebx, [edi+FUTEX.wait_list]
mov esi, [edi+FUTEX.wait_list.next]
@@:
cmp esi, ebx
je @F
mov eax, [esi+MUTEX_WAITER.task]
mov [eax+TASKDATA.state], 0
mov esi, [esi+MUTEX_WAITER.list.next]
inc ecx
cmp ecx, edx
jb @B
@@:
popfd
mov [esp+SYSCALL_STACK._eax], ecx
ret

13
kernel/branches/Kolibri-acpi/kernel32.inc
View File

@ -202,6 +202,19 @@ struct IDE_DEVICE
UDMA_set_mode db ?
ends
struct SYSCALL_STACK
_eip dd ?
_edi dd ? ; +4
_esi dd ? ; +8
_ebp dd ? ; +12
_esp dd ? ; +16
_ebx dd ? ; +20
_edx dd ? ; +24
_ecx dd ? ; +28
_eax dd ? ; +32
ends
; Core functions
include "core/sync.inc" ; macros for synhronization objects
include "core/sys32.inc" ; process management