kolibrios/kernel/branches/flat_kernel/core/sync.inc

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$Revision: 431 $
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ;;
;; Copyright (C) KolibriOS team 2004-2007. All rights reserved. ;;
;; Distributed under terms of the GNU General Public License ;;
;; ;;
;; Synhronization for MenuetOS. ;;
;; Author: Halyavin Andrey, halyavin@land.ru ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
if ~defined sync_inc
sync_inc_fix:
sync_inc fix sync_inc_fix
;simplest mutex.
macro SimpleMutex name
{
; iglobal
name dd 0
name#.type = 1
; endg
}
macro WaitSimpleMutex name
{
local start_wait,ok
start_wait=$
cli
cmp [name],dword 0
jz ok
sti
call change_task
jmp start_wait
ok=$
push eax
mov eax,dword [TASK_BASE+second_base_address]
mov eax,[eax+TASKDATA.pid]
mov [name],eax
pop eax
sti
}
macro ReleaseSimpleMutex name
{
mov [name],dword 0
}
macro TryWaitSimpleMutex name ;result in eax and in flags
{
local ok,try_end
cmp [name],dword 0
jz ok
xor eax,eax
jmp try_end
ok=$
xor eax,eax
inc eax
try_end=$
}
macro SimpleCriticalSection name
{
; iglobal
name dd 0
dd 0
name#.type=2
; endg
}
macro WaitSimpleCriticalSection name
{
local start_wait,first_wait,inc_counter,end_wait
push eax
mov eax,[TASK_BASE+second_base_address]
mov eax,[eax+TASKDATA.pid]
start_wait=$
cli
cmp [name],dword 0
jz first_wait
cmp [name],eax
jz inc_counter
sti
call change_task
jmp start_wait
first_wait=$
mov [name],eax
mov [name+4],dword 1
jmp end_wait
inc_counter=$
inc dword [name+4]
end_wait=$
sti
pop eax
}
macro ReleaseSimpleCriticalSection name
{
local release_end
dec dword [name+4]
jnz release_end
mov [name],dword 0
release_end=$
}
macro TryWaitSimpleCriticalSection name ;result in eax and in flags
{
local ok,try_end
mov eax,[CURRENT_TASK+second_base_address]
mov eax,[eax+TASKDATA.pid]
cmp [name],eax
jz ok
cmp [name],0
jz ok
xor eax,eax
jmp try_end
ok=$
xor eax,eax
inc eax
try_end=$
}
_cli equ call MEM_HeapLock
_sti equ call MEM_HeapUnLock
end if