[MarcZX10]

What

_Cnd_signal and _Cnd_init_with_name now operate on the libc-owned condition objects used by _Cnd_wait, _Cnd_broadcast and _Cnd_init. _Cnd_signal wakes one waiter; _Cnd_init_with_name initializes the same object as _Cnd_init and ignores the optional name. TechnicalDebt records that the inferred ABI and behavior still need console confirmation.

Commit f6266acb8 carries David's implementation from blawesom's #3499, retaining David as commit author and the cherry-pick source. The follow-up test commits preserve the two-waiter notify_one regression coverage, bound each waiter-state wait to five seconds, and set the CTest timeout to 20 seconds so a broken signal path cannot leave this test hanging indefinitely.

Tested

• Linux x86_64, GCC 12.2, Release: built guest_ampr_threads_tests; guest_ampr_threads passed 3/3 consecutive runs on this head.
• python3 tools/check_conventions.py --base upstream/main and git diff --check upstream/main...HEAD passed.
• David's carried implementation had native Windows verification reported on issue #3342. The original feat(libSceAmpr): implement _Cnd_signal and _Cnd_init_with_name #3499 branch also had an independent Linux full-suite run reported as 520/520 on that issue. Those runs preceded the bounded-wait test-only changes in this PR; Windows and the named titles were not run here.

Checklist

• Based on current main; the overlapping implementation from feat(libSceAmpr): implement _Cnd_signal and _Cnd_init_with_name #3499 is carried and credited in this PR
• One topic per PR; follow-ups go in a new PR
• No comments in code except technical debt
• Unimplemented paths throw (NotImplemented_nid_no_patch); silent stubs are listed in TechnicalDebt
• No notes, investigation files or images added to the repository
• New third-party code is a submodule built from source (not applicable)
• Generic behaviour, not specific to one title
• Depends on: none
• AI-assisted: yes

Fixes #3342

[github-actions]

Progress report (a11c8f7 → 625196b)

📈 System libraries: 85.87% (+0.06%, +2 implemented functions)

✅ 2 implemented

Library	Name
libSceAmpr	_Cnd_init_with_name_nid_postfix
libSceAmpr	_Cnd_signal_nid_postfix

[blawesom]

Note for the maintainers: #3499 is an earlier open PR implementing these same two exports — it carries @screamm's commit from #3342 unchanged, is CLEAN with all checks green, and has dual-platform verification (the author's Windows run in #3342 plus an independent Linux full-suite pass, 829/829 including the Vulkan suites).

This PR looks like a clean independent implementation of the same issue, so whichever you prefer is fine — flagging only so the duplication is visible and one review isn't wasted.

[adriadam10]

Closing as a duplicate: #3499 (opened earlier, mergeable, CI green) already implements _Cnd_signal and _Cnd_init_with_name for #3342, touching the same files, and CONTRIBUTING asks that no two open PRs implement the same functions.

Thanks for the work and the test. If #3499 turns out not to be the one that lands, or you find a gap in it, feel free to reopen this or comment there.