remove virtual frame (just using parfait)

This commit is contained in:
Torsten Ruger 2015-05-10 17:12:43 +03:00
parent d41676fdfd
commit a552e3fbce
3 changed files with 23 additions and 26 deletions

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@ -2,8 +2,28 @@
# A Frame is set up by functions that use local variables or temporary variables
# in fact temporary variables are local variables named by the system
# It allows for access to those variables basically
# It allows for access to those variables basically
# A Message and a Frame make up the two sides of message passing:
# A Message (see details there) is created by the sender and control is transferred
# A Frame is created by the receiver
# In static languages these two objects are one, because the method is known at compile time.
# In that case the whole frame is usually on the stack, for leaves even omitted and all data is
# held in registers
#
# In a dynamic language the method is dynamically resolved, and so the size of the frame is not
# know to the caller
# Also exceptions (with the possibility of retry) and the idea of being able to take and store
# bindings make it, to say the very least, unsensibly tricky to store them on the stack. So we don't.
# Also at runtime Messages and Frames remain completely "normal" objects. Ie have layouts and so on.
# Which resolves the dichotomy of objects on the stack or heap. Sama sama.
class Frame < Object
def initialize locals , temps
@locals = locals
@tmps = tmps
end
attr_accessor :locals , :tmps
end

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@ -19,7 +19,7 @@ module Virtual
#global objects (data)
@objects = []
@symbols = []
@frames = 100.times.collect{ ::Frame.new }
@frames = 100.times.collect{ ::Frame.new([],[])}
@messages = 100.times.collect{ ::Message.new }
@next_message = @messages.first
@next_frame = @frames.first

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@ -1,23 +0,0 @@
module Virtual
# A Message and a Frame make up the two sides of message passing:
# A Message (see details there) is created by the sender and control is transferred
# A Frame is created by the receiver
# In static languages these two objects are one, because the method is known at compile time.
# In that case the whole frame is usually on the stack, for leaves even omitted and all data is held in registers
#
# In a dynamic language the method is dynamically resolved, and so the size of the frame is not know to the caller
# Also exceptions (with the possibility of retry) and the idea of being able to take and store bindings
# make it, to say the very least, unsensibly tricky to store them on the stack. So we don't.
# Also at runtime Messages and Frames remain completely "normal" objects. Ie have layouts and so on. Which resolves the
# dichotomy of objects on the stack or heap. Sama sama.
class Frame
def initialize locals , temps
@locals = locals
@tmps = tmps
end
attr_accessor :locals , :tmps
end
end