New Issue: Should 'ioHintSet' support additional hints as type methods?

jeremiah-corrado2 · August 2, 2022, 4:36pm

20346, "jeremiah-corrado", "Should 'ioHintSet' support additional hints as type methods?", "2022-08-02T16:34:53Z"

Should `ioHintSet` support additional hints as type methods?

opened 04:34PM - 02 Aug 22 UTC

type: Design area: Libraries / Modules type: Chapel 2.0

The `ioHintSet` type currently supports the following hints: - sequential - ra…ndom - prefetch - mmap However; there are a few other hints supported by the runtime which were not included in the original proposal (here: https://github.com/chapel-lang/chapel/issues/20141): - QIO_HINT_OWNED - QIO_METHOD_PREADPWRITE - QIO_HINT_PARALLEL - QIO_CH_ALWAYS_UNBUFFERED These are currently being imported and used via the `ioHintSet.direct()` method. For example: https://github.com/chapel-lang/chapel/blob/a104ef5150cd87eadd3ee0c5be9b0f1a17076314/modules/standard/Subprocess.chpl#L584-L587 ___ Should `ioHintSet` have type methods for these hints instead of requiring them to be used via the `direct` method? Specifically, should we add any of the following to the `ioHintSet` type: - ioHintSet.owned - ioHintSet.pReadPWrite - ioHintSet.parallel - ioHintSet.unbuffered

The ioHintSet type currently supports the following hints:

sequential
random
prefetch
mmap

However; there are a few other hints supported by the runtime which were not included in the original proposal (here: IO module: proposed changes to iohints · Issue #20141 · chapel-lang/chapel · GitHub):

QIO_HINT_OWNED
QIO_METHOD_PREADPWRITE
QIO_HINT_PARALLEL
QIO_CH_ALWAYS_UNBUFFERED

These are currently being imported and used via the ioHintSet.direct() method. For example:

github.com

chapel-lang/chapel/blob/a104ef5150cd87eadd3ee0c5be9b0f1a17076314/modules/standard/Subprocess.chpl#L584-L587


      
          try {
            var stdin_file = openfd(stdin_fd, hints=ioHintSet.direct(QIO_HINT_OWNED));
            ret.stdin_channel = stdin_file.writer();
          } catch e: SystemError {

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New Issue: Should 'ioHintSet' support additional hints as type methods?

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