170 lines
4.6 KiB
Ruby
170 lines
4.6 KiB
Ruby
class Ractor
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# Create a new Ractor with args and a block.
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# args are passed via incoming channel.
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# A block (Proc) will be isolated (can't access to outer variables)
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#
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# A ractor has default two channels:
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# an incoming channel and an outgoing channel.
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#
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# Other ractors send objects to the ractor via the incoming channel and
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# the ractor receives them.
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# The ractor send objects via the outgoing channel and other ractors can
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# receive them.
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#
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# The result of the block is sent via the outgoing channel
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# and other
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#
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# r = Ractor.new do
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# Ractor.receive # receive via r's mailbox => 1
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# Ractor.receive # receive via r's mailbox => 2
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# Ractor.yield 3 # yield a message (3) and wait for taking by another ractor.
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# 'ok' # the return value will be yielded.
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# # and r's incoming/outgoing ports are closed automatically.
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# end
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# r.send 1 # send a message (1) into r's mailbox.
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# r << 2 # << is an alias of `send`.
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# p r.take # take a message from r's outgoing port => 3
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# p r.take # => 'ok'
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# p r.take # raise Ractor::ClosedError
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#
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# other options:
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# name: Ractor's name
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#
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def self.new(*args, name: nil, &block)
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b = block # TODO: builtin bug
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raise ArgumentError, "must be called with a block" unless block
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loc = caller_locations(1, 1).first
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loc = "#{loc.path}:#{loc.lineno}"
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__builtin_ractor_create(loc, name, args, b)
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end
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# return current Ractor
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def self.current
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__builtin_cexpr! %q{
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rb_ec_ractor_ptr(ec)->self
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}
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end
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def self.count
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__builtin_cexpr! %q{
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ULONG2NUM(GET_VM()->ractor.cnt);
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}
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end
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# Multiplex multiple Ractor communications.
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#
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# r, obj = Ractor.select(r1, r2)
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# #=> wait for taking from r1 or r2
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# # returned obj is a taken object from Ractor r
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#
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# r, obj = Ractor.select(r1, r2, Ractor.current)
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# #=> wait for taking from r1 or r2
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# # or receive from incoming queue
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# # If receive is succeed, then obj is received value
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# # and r is :receive (Ractor.current)
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#
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# r, obj = Ractor.select(r1, r2, Ractor.current, yield_value: obj)
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# #=> wait for taking from r1 or r2
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# # or receive from incoming queue
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# # or yield (Ractor.yield) obj
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# # If yield is succeed, then obj is nil
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# # and r is :yield
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#
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def self.select(*ractors, yield_value: yield_unspecified = true, move: false)
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__builtin_cstmt! %q{
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const VALUE *rs = RARRAY_CONST_PTR_TRANSIENT(ractors);
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VALUE rv;
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VALUE v = ractor_select(ec, rs, RARRAY_LENINT(ractors),
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yield_unspecified == Qtrue ? Qundef : yield_value,
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(bool)RTEST(move) ? true : false, &rv);
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return rb_ary_new_from_args(2, rv, v);
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}
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end
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# Receive an incoming message from Ractor's incoming queue.
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def self.receive
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__builtin_cexpr! %q{
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ractor_receive(ec, rb_ec_ractor_ptr(ec))
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}
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end
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class << self
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alias recv receive
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end
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private def receive
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__builtin_cexpr! %q{
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// TODO: check current actor
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ractor_receive(ec, RACTOR_PTR(self))
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}
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end
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alias recv receive
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# Send a message to a Ractor's incoming queue.
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#
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# # Example:
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# r = Ractor.new do
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# p Ractor.receive #=> 'ok'
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# end
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# r.send 'ok' # send to r's incoming queue.
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def send(obj, move: false)
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__builtin_cexpr! %q{
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ractor_send(ec, RACTOR_PTR(self), obj, move)
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}
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end
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alias << send
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# yield a message to the ractor's outgoing port.
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def self.yield(obj, move: false)
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__builtin_cexpr! %q{
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ractor_yield(ec, rb_ec_ractor_ptr(ec), obj, move)
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}
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end
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# Take a message from ractor's outgoing port.
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#
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# Example:
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# r = Ractor.new{ 'oK' }
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# p r.take #=> 'ok'
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def take
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__builtin_cexpr! %q{
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ractor_take(ec, RACTOR_PTR(self))
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}
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end
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def inspect
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loc = __builtin_cexpr! %q{ RACTOR_PTR(self)->loc }
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name = __builtin_cexpr! %q{ RACTOR_PTR(self)->name }
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id = __builtin_cexpr! %q{ INT2FIX(RACTOR_PTR(self)->id) }
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status = __builtin_cexpr! %q{
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rb_str_new2(ractor_status_str(RACTOR_PTR(self)->status_))
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}
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"#<Ractor:##{id}#{name ? ' '+name : ''}#{loc ? " " + loc : ''} #{status}>"
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end
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def name
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__builtin_cexpr! %q{ RACTOR_PTR(self)->name }
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end
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class RemoteError
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attr_reader :ractor
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end
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def close_incoming
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__builtin_cexpr! %q{
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ractor_close_incoming(ec, RACTOR_PTR(self));
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}
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end
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def close_outgoing
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__builtin_cexpr! %q{
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ractor_close_outgoing(ec, RACTOR_PTR(self));
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}
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end
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def close
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close_incoming
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close_outgoing
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end
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end
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