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posix: implement _POSIX_THREAD_SAFE_FUNCTIONS's time functions #74180

Merged
merged 2 commits into from
Aug 21, 2024
Merged

posix: implement _POSIX_THREAD_SAFE_FUNCTIONS's time functions #74180

merged 2 commits into from
Aug 21, 2024

Commits on Aug 21, 2024

  1. lib: posix: update option group of readdir_r() 

    `readdir_r()` belongs to the following option group

POSIX_FILE_SYSTEM_R: Thread-Safe File System

Create a new Kconfig `CONFIG_POSIX_FILE_SYSTEM_R` to compile
it.

Signed-off-by: Yong Cong Sin <ycsin@meta.com>
Signed-off-by: Yong Cong Sin <yongcong.sin@gmail.com>
    @ycsin
    ycsin committed Aug 21, 2024
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  2. libc: common: implement multiple time functions 

    Implemented the following:
- `asctime_r()`
- `asctime()`
- `localtime()`
- `localtime_r()`
- `ctime()`
- `ctime_r()`

Specifically:
- the implementation of `localtime()` & `localtime_r()` simply
  wraps around the gmtime() & gmtime_r() functions, the
  results are always expressed as UTC.
- `ctime()` is equivalent to `asctime(localtime(clock))`, it
  inherits the limitation of `localtime()` as well, which only
  supports UTC results currently.

Added tests for these newly implemented functions.

Signed-off-by: Yong Cong Sin <ycsin@meta.com>
Signed-off-by: Yong Cong Sin <yongcong.sin@gmail.com>
    @ycsin
    ycsin committed Aug 21, 2024
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