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

$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