microsoft / microsoft/wil

folder_change_reader_t should close directory handle before closing thread pool I/O

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Dominant language
C++
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Description

According to CloseThreadpoolIo documentation:

You should close the associated file handle and wait for all outstanding overlapped I/O operations to complete before calling this function. You must not cause any more overlapped I/O operations to occur after calling this function.

Current implementation of folder_change_reader_state::~folder_change_reader_state does the opposite.

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start in include/wil/filesystem.h at folder_change_reader_state::~folder_change_reader_state and read the linked CloseThreadpoolIo documentation. Trace the folder_change_reader_t cleanup sequence and confirm how the directory handle and outstanding overlapped I/O are managed. Done means the directory handle is closed and pending I/O has completed before the thread pool I/O object is closed.

Written by the indexing model from the issue text.

Assessment

Tech stack
cpp
Domain
operating-systems
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Clearly specified
Newbie friendliness
66/100

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