Class: HDLRuby::High::Scope

Inherits:
Low::Scope show all
Includes:
HScope_missing, Hinner, Hmux, SingletonExtend
Defined in:
lib/HDLRuby/hruby_high.rb

Overview

Describes a scope for a system type

Constant Summary collapse

High = 
HDLRuby::High

Constants included from Low::Low2Symbol

Low::Low2Symbol::Low2SymbolPrefix, Low::Low2Symbol::Low2SymbolTable, Low::Low2Symbol::Symbol2LowTable

Instance Attribute Summary collapse

Attributes included from Low::Hparent

#parent

Instance Method Summary collapse

Methods included from Hmux

#mux

Methods included from HScope_missing

#h_missing, #method_missing

Methods included from Hmissing

#method_missing

Methods included from SingletonExtend

#eigen_extend

Methods included from Hinner

included

Methods inherited from Low::Scope

#add_behavior, #add_code, #add_connection, #add_inner, #add_scope, #add_systemI, #add_systemT, #add_type, #blocks2seq!, #boolean_in_assign2select!, #break_concat_assigns!, #break_types!, #c_code_allocate, #casts_without_expression!, #cleanup!, #delete_all_behaviors!, #delete_all_conncetions!, #delete_behavior!, #delete_connection!, #delete_inner!, #delete_related!, #delete_scope!, #delete_systemI!, #delete_systemT!, #delete_type!, #delete_unless!, #each_behavior, #each_behavior_deep, #each_block_deep, #each_code, #each_connection, #each_connection_deep, #each_deep, #each_inner, #each_node_deep, #each_scope, #each_scope_deep, #each_signal, #each_signal_deep, #each_statement_deep, #each_systemI, #each_systemT, #each_type, #eql?, #explicit_types!, #extract_behaviors!, #extract_connections!, #extract_declares!, #extract_port_assign!, #get_all_inners, #get_by_name, #get_code, #get_inner, #get_signal, #get_systemI, #get_systemT, #get_type, #has_behavior?, #has_code?, #has_connection?, #has_inner?, #has_scope?, #has_signal?, #has_systemI?, #has_systemT?, #has_type?, #hash, #initial_concat_to_timed!, #instance_port?, #last_behavior, #make_portw, #map_behaviors!, #map_connections!, #map_inners!, #map_scopes!, #map_systemIs!, #map_systemTs!, #map_types!, #mixblocks2seq!, #par_in_seq2seq!, #parent_system, #port_assign?, #portw2ref, #portw_name2sym, #replace_names!, #replace_names_subs!, #reverse_each_behavior, #select2case!, #sym2portw_name, #to_c, #to_ch, #to_hdr, #to_high, #to_upper_space!, #to_vhdl, #top_scope, #with_port!

Methods included from Low::ForceName

#extend_name!, #force_name!

Methods included from Low::Low2Symbol

#to_sym

Methods included from Low::Hparent

#hierarchy, #scope

Constructor Details

#initialize(name = :"", systemT = nil, &ruby_block) ⇒ Scope

Creates a new scope with possible +name+. If the scope is a top scope of a system, this systemT is given by +systemT+.

The proc +ruby_block+ is executed for building the scope. If no block is provided, the scope is the top of a system and is filled by the instantiation procedure of the system.



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# File 'lib/HDLRuby/hruby_high.rb', line 811

def initialize(name = :"", systemT = nil, &ruby_block)
    # Initialize the scope structure
    super(name)

    # Initialize the set of grouped system instances.
    @groupIs = {}

    # Creates the namespace.
    @namespace = Namespace.new(self)

    # Register the scope if it is not the top scope of a system
    # (in which case the system has already be registered with
    # the same name).
    unless name.empty? or systemT then
        # Named scope, set the hdl-like access to the scope.
        obj = self # For using the right self within the proc
        High.space_reg(name) { obj }
    end

    # Initialize the set of exported inner signals and instances
    @exports = {}
    # Initialize the set of included systems.
    @includes = {}

    # Builds the scope if a ruby block is provided
    # (which means the scope is not the top of a system).
    self.build(&ruby_block) if block_given?
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method in the class HDLRuby::High::HScope_missing

Instance Attribute Details

#name ⇒ Object (readonly)

The name of the scope if any.



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# File 'lib/HDLRuby/hruby_high.rb', line 795

def name
  @name
end

#namespace ⇒ Object (readonly)

The namespace



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# File 'lib/HDLRuby/hruby_high.rb', line 798

def namespace
  @namespace
end

#return_value ⇒ Object (readonly)

The return value when building the scope.



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# File 'lib/HDLRuby/hruby_high.rb', line 801

def return_value
  @return_value
end

Instance Method Details

#add_export(name) ⇒ Object

Adds a +name+ to export.

NOTE: if the name do not corresponds to any inner signal nor instance, raise an exception.

Raises:



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# File 'lib/HDLRuby/hruby_high.rb', line 882

def add_export(name)
    # Check the name.
    name = name.to_sym
    # Look for construct to make public.
    # Maybe it is an inner signals.
    inner = self.get_inner(name)
    if inner then
        # Yes set it as export.
        @exports[name] = inner
        return
    end
    # No, maybe it is an instance.
    instance = self.get_systemI(name)
    if instance then
        # Yes, set it as export.
        @exports[name] = instance
        return
    end
    # No, error.
    raise AnyError, "Invalid name for export: #{name}"
end

#add_groupI(name, *instances) ⇒ Object

Adds a group of system +instances+ named +name+.



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# File 'lib/HDLRuby/hruby_high.rb', line 847

def add_groupI(name, *instances)
    # Ensure name is a symbol and is not already used for another
    # group.
    name = name.to_sym
    if @groupIs.key?(name)
        raise AnyError,
              "Group of system instances named #{name} already exist."
    end
    # Add the group.
    @groupIs[name.to_sym] = instances
    # Sets the parent of the instances.
    instances.each { |instance| instance.parent = self }
end

#add_inout(signal) ⇒ Object

Adds inout +signal+ in the current system.



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# File 'lib/HDLRuby/hruby_high.rb', line 995

def add_inout(signal)
    self.parent.add_inout(signal)
end

#add_input(signal) ⇒ Object

Adds input +signal+ in the current system.



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# File 'lib/HDLRuby/hruby_high.rb', line 985

def add_input(signal)
    self.parent.add_input(signal)
end

#add_output(signal) ⇒ Object

Adds output +signal+ in the current system.



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# File 'lib/HDLRuby/hruby_high.rb', line 990

def add_output(signal)
    self.parent.add_output(signal)
end

#as(system) ⇒ Object

Casts as an included +system+.



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# File 'lib/HDLRuby/hruby_high.rb', line 1249

def as(system)
    # puts "as with name: #{system.name}"
    system = system.name if system.respond_to?(:name)
    # puts "includes are: #{@includes.keys}"
    return @includes[system].namespace
end

#build(&ruby_block) ⇒ Object

Build the scope by executing +ruby_block+.

NOTE: used when the scope is not the top of a system.



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# File 'lib/HDLRuby/hruby_high.rb', line 943

def build(&ruby_block)
    # Set the namespace for buidling the scope.
    High.space_push(@namespace)
    # Build the scope.
    # @return_value = High.top_user.instance_eval(&ruby_block)
    res = High.top_user.instance_eval(&ruby_block)
    High.space_pop
    # Now gain access to the result within the sub scope.
    if (res.is_a?(HRef)) then
        @return_value = res.type.inner(HDLRuby.uniq_name)
        High.space_push(@namespace)
        @return_value <= res
        High.space_pop
    else
        @return_value = res
    end
    # This will be the return value.
    @return_value
end

#build_top(base, *args) ⇒ Object

Builds the scope using +base+ as model scope with possible arguments +args+.

NOTE: Used by the instantiation procedure of a system.



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# File 'lib/HDLRuby/hruby_high.rb', line 968

def build_top(base,*args)
    # Fills its namespace with the content of the base scope
    # (this latter may already contains access points if it has been
    #  opended for extension previously).
    @namespace.concat_namespace(base.namespace)
    High.space_push(@namespace)
    # Execute the instantiation block
    base.parent.each_instance_proc do |instance_proc|
        @return_value = High.top_user.instance_exec(*args,&instance_proc)
    end
    High.space_pop
end

#code(*content, &ruby_block) ⇒ Object

Declares a non-HDLRuby set of code chunks described by +content+ and completed from +ruby_block+ execution result. NOTE: content includes the events to activate the code on and a description of the code as a hash assotiating names to code text.



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# File 'lib/HDLRuby/hruby_high.rb', line 1056

def code(*content, &ruby_block)
    # Process the content.
    # Separate events from code chunks descriptions.
    events, chunks = content.partition {|elem| elem.is_a?(Event) }
    # Generates a large hash from the code.
    chunks = chunks.reduce(:merge)
    # Adds the result of the ruby block if any.
    if ruby_block then
        chunks.merge(HDLRuby::High.top_user.instance_eval(&ruby_block))
    end
    # Create the chunk objects.
    chunks = chunks.each.map do |name,content|
        content = [*content]
        # Process the lumps
        content.map! do |lump|
            lump.respond_to?(:to_expr) ? lump.to_expr : lump
        end
        Chunk.new(name,*content)
    end
    # Create the code object.
    res = Code.new
    # Adds the events.
    events.each(&res.method(:add_event))
    # Adds the chunks.
    chunks.each(&res.method(:add_chunk))
    # Adds the resulting code to the current scope.
    HDLRuby::High.top_user.add_code(res)
    # Return the resulting code
    return res
end

#cur_system ⇒ Object

Gets the current system.



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# File 'lib/HDLRuby/hruby_high.rb', line 1258

def cur_system
    return HDLRuby::High.cur_system
end

#each_export(&ruby_block) ⇒ Object

Iterates over the exported constructs.

Returns an enumerator if no ruby block is given.



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# File 'lib/HDLRuby/hruby_high.rb', line 907

def each_export(&ruby_block)
    # No ruby block? Return an enumerator.
    return to_enum(:each_export) unless ruby_block
    # A block? Apply it on each input signal instance.
    @exports.each_value(&ruby_block)
    # And apply on the sub scopes if any.
    @scopes.each {|scope| scope.each_export(&ruby_block) }
end

#each_groupI(&ruby_block) ⇒ Object

Iterates over the group of system instances.

Returns an enumerator if no ruby block is given.



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# File 'lib/HDLRuby/hruby_high.rb', line 871

def each_groupI(&ruby_block)
    # No ruby block? Return an enumerator.
    return to_enum(:each_groupI) unless ruby_block
    # A block? Apply it on each input signal instance.
    @groupIs.each(&ruby_block)
end

#each_included(&ruby_block) ⇒ Object

Iterates over the included systems.



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# File 'lib/HDLRuby/hruby_high.rb', line 917

def each_included(&ruby_block)
    # No ruby block? Return an enumerator.
    return to_enum(:each_included) unless ruby_block
    # A block? Apply it on each included system.
    @includes.each_value(&ruby_block)
    # And apply on the sub scopes if any.
    @scopes.each {|scope| scope.each_included(&ruby_block) }
end

#export(*names) ⇒ Object

Sets the constructs corresponding to +names+ as exports.



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# File 'lib/HDLRuby/hruby_high.rb', line 1203

def export(*names)
    names.each {|name| self.add_export(name) }
end

#fill_low(scopeL) ⇒ Object

Fills a low level scope with self's contents.

NOTE: name conflicts are treated in the current NameStack state.



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# File 'lib/HDLRuby/hruby_high.rb', line 1267

def fill_low(scopeL)
    # Adds the content of its included systems.
    @includes.each_value {|system| system.scope.fill_low(scopeL) }
    # Adds the declared local system types.
    # NOTE: in the current version of HDLRuby::High, there should not
    # be any of them (only eigen systems are real system types).
    self.each_systemT { |systemT| scopeL.add_systemT(systemT.to_low) }
    # Adds the local types.
    self.each_type { |type| scopeL.add_type(type.to_low) }
    # Adds the inner scopes.
    self.each_scope { |scope| scopeL.add_scope(scope.to_low) }
    # Adds the inner signals.
    self.each_inner { |inner| scopeL.add_inner(inner.to_low) }
    # Adds the instances.
    # Single ones.
    self.each_systemI do |systemI|
        # puts "Filling with systemI=#{systemI.name}"
        systemI_low = scopeL.add_systemI(systemI.to_low)
        # Also add the eigen system to the list of local systems.
        scopeL.add_systemT(systemI_low.systemT)
    end
    # Grouped ones.
    self.each_groupI do |name,systemIs|
        systemIs.each.with_index { |systemI,i|
            # Sets the name of the system instance
            # (required for conversion of further accesses).
            # puts "systemI.respond_to?=#{systemI.respond_to?(:name=)}"
            systemI.name = name.to_s + "[#{i}]"
            # And convert it to low
            systemI_low = scopeL.add_systemI(systemI.to_low())
            # Also add the eigen system to the list of local systems.
            scopeL.add_systemT(systemI_low.systemT)
        }
    end
    # Adds the code chunks.
    self.each_code { |code| scopeL.add_code(code.to_low) }
    # Adds the connections.
    self.each_connection { |connection|
        # puts "connection=#{connection}"
        scopeL.add_connection(connection.to_low)
    }
    # Adds the behaviors.
    self.each_behavior { |behavior|
        scopeL.add_behavior(behavior.to_low)
    }
end

#get_groupI(name) ⇒ Object

Access a group of system instances by +name+.

NOTE: the result is a copy of the group for avoiding side effects.



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# File 'lib/HDLRuby/hruby_high.rb', line 864

def get_groupI(name)
    return @groupIs[name.to_sym].clone
end

#hcase(value) ⇒ Object

Creates a new case statement with a +value+ used for deciding which block to execute.

NOTE:

  • the when part is defined through the hwhen method.
  • a new behavior is created to enclose the hcase.


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# File 'lib/HDLRuby/hruby_high.rb', line 1180

def hcase(value)
    self.par do
        hcase(value)
    end
end

#helse(mode = nil, &ruby_block) ⇒ Object

Sets the block executed when the condition is not met to the block in +mode+ generated by the execution of +ruby_block+.

Can only be used once.

NOTE: added to the hif of the last behavior.



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# File 'lib/HDLRuby/hruby_high.rb', line 1149

def helse(mode = nil, &ruby_block)
    # There is a ruby_block: the helse is assumed to be with
    # the last statement of the last behavior.
    statement = self.last_behavior.last_statement
    # Completes the hif or the hcase statement.
    unless statement.is_a?(If) or statement.is_a?(Case) then
        raise AnyError, "Error: helse statement without hif nor hcase (#{statement.class})."
    end
    statement.helse(mode, &ruby_block)
end

#helsif(condition, mode = nil, &ruby_block) ⇒ Object

Sets the condition check when the condition is not met to the block, with a +condition+ that when met lead to the execution of the block in +mode+ generated by the +ruby_block+.



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# File 'lib/HDLRuby/hruby_high.rb', line 1163

def helsif(condition, mode = nil, &ruby_block)
    # There is a ruby_block: the helse is assumed to be with
    # the last statement of the last behavior.
    statement = self.last_behavior.last_statement
    # Completes the hif statement.
    unless statement.is_a?(If) then
        raise AnyError, "Error: helsif statement without hif (#{statement.class})."
    end
    statement.helsif(condition, mode, &ruby_block)
end

#hif(condition, mode = nil, &ruby_block) ⇒ Object

Creates a new if statement with a +condition+ that when met lead to the execution of the block in +mode+ generated by the +ruby_block+.

NOTE:

  • the else part is defined through the helse method.
  • a behavior is created to enclose the hif.


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# File 'lib/HDLRuby/hruby_high.rb', line 1137

def hif(condition, mode = nil, &ruby_block)
    self.par do
        hif(condition,mode,&ruby_block)
    end
end

#hwhen(match, mode = nil, &ruby_block) ⇒ Object

Sets the block of a case structure executed when the +match+ is met to the block in +mode+ generated by the execution of +ruby_block+.

Can only be used once.



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# File 'lib/HDLRuby/hruby_high.rb', line 1190

def hwhen(match, mode = nil, &ruby_block)
    # There is a ruby_block: the helse is assumed to be with
    # the last statement of the last behavior.
    statement = @behaviors.last.last_statement
    # Completes the hcase statement.
    unless statement.is_a?(Case) then
        raise AnyError, "Error: hwhen statement without hcase (#{statement.class})."
    end
    statement.hwhen(match, mode, &ruby_block)
end

#include(system, *args) ⇒ Object

Include a +system+ type with possible +args+ instanciation arguments.



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# File 'lib/HDLRuby/hruby_high.rb', line 1209

def include(system,*args)
    if @includes.key?(system.name) then
        raise AnyError, "Cannot include twice the same system."
    end
    # puts "Include system=#{system.name}"
    # Save the name of the included system, it will serve as key
    # for looking for the included expanded version.
    include_name = system.name
    # Expand the system to include
    system = system.expand(:"",*args)
    # Add the included system interface to the current one.
    if self.parent.is_a?(SystemT) then
        space = self.namespace
        # Interface signals
        # puts "i_name=#{i_name} @to_includes=#{@to_includes.size}"
        system.each_signal_with_included do |signal|
            # puts "signal=#{signal.name}"
            space.send(:define_singleton_method,signal.name) do
                signal
            end
        end
        # Exported objects
        system.each_export do |export|
            # puts "export=#{export.name}"
            space.send(:define_singleton_method,export.name) do
                export
            end
        end
        # Adds the task to execute on the instance.
        system.each_on_instance do |task|
            self.parent.on_instance(&task)
        end
    end
    # Adds it the list of includeds
    @includes[include_name] = system
    # puts "@includes=#{@includes}"
    
end

#inout(*names) ⇒ Object

Declares high-level bit inout signals named +names+ in the current system.



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# File 'lib/HDLRuby/hruby_high.rb', line 1047

def inout(*names)
    self.parent.inout(*names)
end

#input(*names) ⇒ Object

Declares high-level bit input signals named +names+ in the current system.



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# File 'lib/HDLRuby/hruby_high.rb', line 1035

def input(*names)
    self.parent.input(*names)
end

#make_inouts(type, *names) ⇒ Object

Creates and adds a set of inouts typed +type+ from a list of +names+ in the current system.

NOTE: a name can also be a signal, is which case it is duplicated.



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# File 'lib/HDLRuby/hruby_high.rb', line 1019

def make_inouts(type, *names)
    self.parent.make_inouts(type,*names)
end

#make_inputs(type, *names) ⇒ Object

Creates and adds a set of inputs typed +type+ from a list of +names+ in the current system.

NOTE: a name can also be a signal, is which case it is duplicated.



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# File 'lib/HDLRuby/hruby_high.rb', line 1003

def make_inputs(type, *names)
    self.parent.make_inputs(type,*names)
end

#make_outputs(type, *names) ⇒ Object

Creates and adds a set of outputs typed +type+ from a list of +names+ in the current system.

NOTE: a name can also be a signal, is which case it is duplicated.



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# File 'lib/HDLRuby/hruby_high.rb', line 1011

def make_outputs(type, *names)
    self.parent.make_outputs(type,*names)
end

#open(&ruby_block) ⇒ Object

Opens for extension.

NOTE: actually executes +ruby_block+ in the context.



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# File 'lib/HDLRuby/hruby_high.rb', line 930

def open(&ruby_block)
    High.space_push(@namespace)
    res = High.top_user.instance_eval(&ruby_block)
    High.space_pop
    # Return the result of the execution so that it can be used
    # as an expression
    res
end

#output(*names) ⇒ Object

Declares high-level bit output signals named +names+ in the current system.



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# File 'lib/HDLRuby/hruby_high.rb', line 1041

def output(*names)
    self.parent.output(*names)
end

#par(*events, &ruby_block) ⇒ Object

Declares a high-level parallel behavior activated on a list of +events+, and built by executing +ruby_block+.



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# File 'lib/HDLRuby/hruby_high.rb', line 1113

def par(*events, &ruby_block)
    # Preprocess the events.
    events.map! do |event|
        event.respond_to?(:to_event) ? event.to_event : event
    end
    # Create and add the resulting behavior.
    self.add_behavior(Behavior.new(:par,*events,&ruby_block))
end

#seq(*events, &ruby_block) ⇒ Object

Declares a high-level sequential behavior activated on a list of +events+, and built by executing +ruby_block+.



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# File 'lib/HDLRuby/hruby_high.rb', line 1102

def seq(*events, &ruby_block)
    # Preprocess the events.
    events.map! do |event|
        event.respond_to?(:to_event) ? event.to_event : event
    end
    # Create and add the resulting behavior.
    self.add_behavior(Behavior.new(:seq,*events,&ruby_block))
end

#sub(name = :"", &ruby_block) ⇒ Object

Declares a sub scope with possible +name+ and built from +ruby_block+.



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# File 'lib/HDLRuby/hruby_high.rb', line 1088

def sub(name = :"", &ruby_block)
    # Creates the new scope.
    scope = Scope.new(name,&ruby_block)
    # puts "new scope=#{scope}"
    # Add it
    self.add_scope(scope)
    # puts "self=#{self}"
    # puts "self scopes=#{self.each_scope.to_a.join(",")}"
    # Use its return value
    return scope.return_value
end

#timed(&ruby_block) ⇒ Object

Declares a high-level timed behavior built by executing +ruby_block+. By default, timed behavior are sequential.



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# File 'lib/HDLRuby/hruby_high.rb', line 1124

def timed(&ruby_block)
    # Create and add the resulting behavior.
    self.add_behavior(TimeBehavior.new(:seq,&ruby_block))
end

#to_low ⇒ Object

Converts the scope to HDLRuby::Low.



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# File 'lib/HDLRuby/hruby_high.rb', line 1315

def to_low()
    # Create the resulting low scope.
    # scopeL = HDLRuby::Low::Scope.new()
    scopeL = HDLRuby::Low::Scope.new(self.name)
    # # For debugging: set the source high object 
    # scopeL.properties[:low2high] = self.hdr_id
    # self.properties[:high2low] = scopeL

    # Push the private namespace for the low generation.
    High.space_push(@namespace)
    # Pushes on the name stack for converting the internals of
    # the system.
    High.names_push
    # Adds the content of the actual system.
    self.fill_low(scopeL)
    # Restores the name stack.
    High.names_pop
    # Restores the namespace stack.
    High.space_pop
    # Return theresulting system.
    return scopeL
end

#to_ref ⇒ Object

Converts to a new reference.



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# File 'lib/HDLRuby/hruby_high.rb', line 1024

def to_ref
    return RefObject.new(this,self)
end

#to_user ⇒ Object

Converts to a namespace user.



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# File 'lib/HDLRuby/hruby_high.rb', line 841

def to_user
    # Already a user.
    return self
end