bpo-41299: QueryPerformanceFrequency() cannot fail - #28552
Merged
vstinner merged 2 commits intoSep 24, 2021
Merged
vstinner merged 2 commits into
vstinner merged 2 commits into
Conversation
Copy link
Copy Markdown
Member
Sorry, something went wrong.
py_win_perf_counter_frequency() no longer checks for QueryPerformanceFrequency() failure. According to the QueryPerformanceFrequency() documentation, the function can no longer fails since Windows XP.
zooba
reviewed
Sep 24, 2021
Comment thread
Python/pytime.c
| return -1; | ||
| } | ||
| // Since Windows XP, the function cannot fail. | ||
| (void)QueryPerformanceFrequency(&freq); |
Copy link
Copy Markdown
Member
There was a problem hiding this comment.
Why query this every time? It's fixed at boot, so it isn't going to change.
Sorry, something went wrong.
Copy link
Copy Markdown
Member
Author
There was a problem hiding this comment.
This function must be called exactly once in a process: py_get_win_perf_counter() uses a static variable for that.
Sorry, something went wrong.
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
py_win_perf_counter_frequency() no longer checks for
QueryPerformanceFrequency() failure. According to the
QueryPerformanceFrequency() documentation, the function can no longer
fails since Windows XP.
https://bugs.python.org/issue41299