spinlock.nim

# The MIT License (MIT)
# 
# Copyright (c) 2015 Kashyap
# 
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
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# furnished to do so, subject to the following conditions:
# 
# The above copyright notice and this permission notice shall be included in all
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# 
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# SOFTWARE.

import x86asm
import vm64

type Spinlock* = object
  locked: int
  name: cstring
  #TODO - this structure is incomplete


proc initlock*(lk: ptr Spinlock, name: cstring) =
  lk.locked = 0
  lk.name = name
  #TODO - this structure is incomplete

proc pushcli*() =
  var eflags = readeflags()
  cli()

  #TODO - add the if check also
  cpu.intena = 0
  

proc acquire*(lk: ptr Spinlock) = 
  pushcli()
  var x = 0