Class: Async::IO::Generic
- Inherits:
-
Wrapper
- Object
- Wrapper
- Async::IO::Generic
show all
- Extended by:
- Forwardable
- Defined in:
- lib/async/io/generic.rb
Overview
Represents an asynchronous IO within a reactor.
Constant Summary
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- WRAPPERS =
{}
Class Attribute Summary collapse
Instance Attribute Summary collapse
Class Method Summary
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Instance Method Summary
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Class Attribute Details
.wrapped_klass ⇒ Object
Returns the value of attribute wrapped_klass.
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# File 'lib/async/io/generic.rb', line 58
def wrapped_klass
@wrapped_klass
end
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Instance Attribute Details
#timeout ⇒ Object
Returns the value of attribute timeout.
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# File 'lib/async/io/generic.rb', line 194
def timeout
@timeout
end
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Class Method Details
.wrap(*args) ⇒ Object
Instantiate a wrapped instance of the class, and optionally yield it to a given block, closing it afterwards.
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# File 'lib/async/io/generic.rb', line 72
def wrap(*args)
wrapper = self.new(@wrapped_klass.new(*args))
return wrapper unless block_given?
begin
yield wrapper
ensure
wrapper.close
end
end
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.wrap_blocking_method(new_name, method_name, invert: true, &block) ⇒ Object
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# File 'lib/async/io/generic.rb', line 41
def wrap_blocking_method(new_name, method_name, invert: true, &block)
if block_given?
define_method(new_name, &block)
else
define_method(new_name) do |*args|
async_send(method_name, *args)
end
end
if invert
define_method(method_name) do |*args, exception: false|
async_send(method_name, *args)
end
end
end
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.wraps(klass, *additional_methods) ⇒ Object
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# File 'lib/async/io/generic.rb', line 60
def wraps(klass, *additional_methods)
@wrapped_klass = klass
WRAPPERS[klass] = self
def_delegators :@io, *additional_methods
end
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Instance Method Details
#<<(buffer) ⇒ Object
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# File 'lib/async/io/generic.rb', line 154
def << buffer
write(buffer)
return self
end
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#connected? ⇒ Boolean
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# File 'lib/async/io/generic.rb', line 190
def connected?
!@io.closed?
end
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#dup ⇒ Object
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# File 'lib/async/io/generic.rb', line 159
def dup
super.tap do |copy|
copy.timeout = self.timeout
end
end
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#nonblock ⇒ Object
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# File 'lib/async/io/generic.rb', line 178
def nonblock
true
end
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#nonblock=(value) ⇒ Object
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# File 'lib/async/io/generic.rb', line 182
def nonblock= value
true
end
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#nonblock? ⇒ Boolean
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# File 'lib/async/io/generic.rb', line 186
def nonblock?
true
end
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#read(length = nil, buffer = nil) ⇒ Object
Read ‘length` bytes of data from the underlying I/O. If length is unspecified, read everything.
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# File 'lib/async/io/generic.rb', line 95
def read(length = nil, buffer = nil)
if buffer
buffer.clear
else
buffer = String.new
end
if length
return String.new(encoding: Encoding::BINARY) if length <= 0
if buffer = self.sysread(length, buffer)
while buffer.bytesize < length
if chunk = self.sysread(length - buffer.bytesize)
buffer << chunk
else
break
end
end
return buffer
else
return nil
end
else
buffer = self.sysread(BLOCK_SIZE, buffer)
while chunk = self.sysread(BLOCK_SIZE)
buffer << chunk
end
return buffer
end
end
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#sysread ⇒ Object
Read the specified number of bytes from the input stream. This is fast path. Invokes ‘read_nonblock` on the underlying io. If the operation would block, the current task is paused until the operation can succeed, at which point it’s resumed and the operation is completed.
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# File 'lib/async/io/generic.rb', line 90
wrap_blocking_method :sysread, :read_nonblock
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#syswrite ⇒ Object
Write entire buffer to output stream. This is fast path. Invokes ‘write_nonblock` on the underlying io. If the operation would block, the current task is paused until the operation can succeed, at which point it’s resumed and the operation is completed.
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# File 'lib/async/io/generic.rb', line 136
wrap_blocking_method :syswrite, :write_nonblock
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#wait(timeout = self.timeout, mode = :read) ⇒ Object
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# File 'lib/async/io/generic.rb', line 165
def wait(timeout = self.timeout, mode = :read)
case mode
when :read
wait_readable(timeout)
when :write
wait_writable(timeout)
else
wait_any(:rw, timeout)
end
rescue TimeoutError
return nil
end
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#write(buffer) ⇒ Object
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# File 'lib/async/io/generic.rb', line 138
def write(buffer)
written = self.syswrite(buffer)
remaining = buffer.bytesize - written
while remaining > 0
length = self.syswrite(buffer.byteslice(written, remaining))
remaining -= length
written += length
end
return written
end
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