timer: proper way to check POSIX timers support #136
Merged
Conversation
This file contains 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
The _POSIX_TIMERS macros can be used to determine the degree of a host's support for the posix timers API. The POSIX definition (2018 edition) says that: _POSIX_TIMERS The implementation supports timers. This symbol shall always be set to the value 200809L. It's defined in the <unistd.h> header. Tested on esp32, pico and teensy4. Signed-off-by: Thomas Chou <thomas@wytron.com.tw>
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Outdated suggestions cannot be applied.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.
The _POSIX_TIMERS macros can be used to determine the degree of a host's support for the posix timers API.
The POSIX definition (2018 edition) says that:
_POSIX_TIMERS
The implementation supports timers. This symbol shall always be set to the value 200809L.
It's defined in the <unistd.h> header.
Tested on esp32, pico and teensy4.