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https://github.com/logos-storage/logos-storage-nim.git
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73 lines
1.9 KiB
Nim
73 lines
1.9 KiB
Nim
## Nim-LibP2P
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## Copyright (c) 2019 Status Research & Development GmbH
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## Licensed under either of
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## * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
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## * MIT license ([LICENSE-MIT](LICENSE-MIT))
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## at your option.
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## This file may not be copied, modified, or distributed except according to
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## those terms.
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{.push raises: [].}
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import std/streams
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import pkg/libp2p
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import pkg/chronos
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import ../logutils
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logScope:
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topics = "libp2p stdstreamwrapper"
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const StdStreamWrapperName* = "StdStreamWrapper"
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type StdStreamWrapper* = ref object of LPStream
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stream*: Stream
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method initStream*(self: StdStreamWrapper) =
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if self.objName.len == 0:
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self.objName = StdStreamWrapperName
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procCall LPStream(self).initStream()
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proc newStdStreamWrapper*(stream: Stream = nil): StdStreamWrapper =
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let stream = StdStreamWrapper(stream: stream)
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stream.initStream()
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return stream
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template withExceptions(body: untyped) =
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try:
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body
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except CatchableError as exc:
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raise newException(Defect, "Unexpected error in StdStreamWrapper", exc)
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method readOnce*(
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self: StdStreamWrapper, pbytes: pointer, nbytes: int
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): Future[int] {.async: (raises: [CancelledError, LPStreamError]).} =
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trace "Reading bytes from stream", bytes = nbytes
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if isNil(self.stream):
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error "StdStreamWrapper: stream is nil"
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raiseAssert("StdStreamWrapper: stream is nil")
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if self.atEof:
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raise newLPStreamEOFError()
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withExceptions:
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return self.stream.readData(pbytes, nbytes)
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method atEof*(self: StdStreamWrapper): bool =
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withExceptions:
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return self.stream.atEnd()
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method closeImpl*(self: StdStreamWrapper) {.async: (raises: []).} =
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try:
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trace "Shutting down std stream"
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self.stream.close()
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trace "Shutdown async chronos stream"
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except CatchableError as exc:
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trace "Error closing std stream", msg = exc.msg
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await procCall LPStream(self).closeImpl()
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