Class: Rbgo::Channel::NonBufferChan
- Inherits:
-
Object
- Object
- Rbgo::Channel::NonBufferChan
show all
- Includes:
- Chan
- Defined in:
- lib/rbgo/select_chan.rb
Overview
Instance Method Summary
collapse
Methods included from Chan
after, #each, new, perform, tick
Constructor Details
Returns a new instance of NonBufferChan.
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# File 'lib/rbgo/select_chan.rb', line 103
def initialize
self.enq_mutex = Mutex.new
self.deq_mutex = Mutex.new
self.enq_cond = ConditionVariable.new
self.deq_cond = ConditionVariable.new
self.resource_array = []
self.close_flag = false
self.have_enq_waiting_flag = false
self.have_deq_waiting_flag = false
self.ios = []
self.register_mutex = Mutex.new
end
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Instance Method Details
#close ⇒ Object
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# File 'lib/rbgo/select_chan.rb', line 206
def close
deq_mutex.synchronize do
self.close_flag = true
enq_cond.broadcast
deq_cond.broadcast
notify
self
end
end
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#closed? ⇒ Boolean
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# File 'lib/rbgo/select_chan.rb', line 216
def closed?
close_flag
end
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#pop(nonblock = false) ⇒ Object
Also known as:
deq, shift
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# File 'lib/rbgo/select_chan.rb', line 171
def pop(nonblock = false)
resource = nil
ok = true
if closed?
return [nil, false]
end
if nonblock
raise ThreadError.new unless deq_mutex.try_lock
else
deq_mutex.lock
end
begin
if nonblock
raise ThreadError.new unless have_enq_waiting_flag
end
while resource_array.empty? && !closed?
self.have_deq_waiting_flag = true
notify
enq_cond.wait(deq_mutex)
end
resource = resource_array.first
ok = false if resource_array.empty?
resource_array.clear
self.have_deq_waiting_flag = false
deq_cond.signal
ensure
deq_mutex.unlock
end
[resource, ok]
end
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#push(obj, nonblock = false) ⇒ Object
Also known as:
<<, enq
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# File 'lib/rbgo/select_chan.rb', line 117
def push(obj, nonblock = false)
if closed?
raise ClosedQueueError.new
end
if nonblock
raise ThreadError.new unless enq_mutex.try_lock
else
enq_mutex.lock
end
begin
if nonblock
raise ThreadError.new unless have_deq_waiting_flag
end
begin
if closed?
raise ClosedQueueError.new
else
deq_mutex.synchronize do
resource_array[0] = obj
enq_cond.signal
until resource_array.empty? || closed?
self.have_enq_waiting_flag = true
begin
Thread.new do
deq_mutex.synchronize do
end
notify
end
rescue Exception => ex
Rbgo.logger&.error('Rbgo') { "#{ex.message}\n#{ex.backtrace}" }
sleep 1
retry
end
deq_cond.wait(deq_mutex)
end
raise ClosedQueueError.new if closed?
end
end
ensure
self.have_enq_waiting_flag = false
end
ensure
enq_mutex.unlock
end
self
end
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