[Th3EvilGod]

What

_Thrd_sleep uses winpthreads nanosleep on Windows, which truncates sub-millisecond requests and can finish millisecond waits on 15.6 ms clock steps. Use the existing high-resolution waitable-timer helper for the bounded relative wait, rounding up to 100 ns, then recheck the absolute realtime deadline.

The existing xtime normalization, one-day chunk bound, past-deadline behavior and POSIX nanosleep path remain intact. Add guest-API checks for 100 us and 2 ms deadlines and a broad 12 ms median bound over 31 samples. Keep the existing cancellation/console-contract gaps explicit in libc technical debt.

Related to #1471; this addresses only _Thrd_sleep. #7735 changes condition-variable waits in the same source file, independently of this function.

Tested

Windows 11 Pro (26300), AMD Ryzen 7 9800X3D, WinLibs MinGW-w64 GCC 15.2.0 r7, Release build. No title or console verification.

• With the new regression test on main 7c2334d20835a4126ec8c8ba4af32735c4535eed, the 2 ms guest sleep median was 15,527,800 ns and guest_ampr_threads failed the 12 ms bound; the other three guest thread/import tests passed.
• With the fix, all five focused tests passed: precise_wait, guest_libc_threads, guest_libc_static_imports, guest_libc_cnd_timed_wait, and guest_ampr_threads. The 2 ms guest sleep median was 2,005,500 ns. Existing past, normalized-positive/negative xtime and null-target checks passed. Every sampled short sleep was checked against its absolute realtime deadline.
• Rebuilt and reran the same five tests after rebasing onto main 606ebafd203c016ec18b8501a1f50a76ad52bf02: 5/5 passed.
• python tools/check_conventions.py --base origin/main: passed.
• python tools/pr_overlap.py --branch codex/libc-precise-thread-sleep --repo boykopovar/AnyPS5: completed with no confirmed overlaps. Manually inspected the shared files flagged for stale/conflicting PRs feat(aot): discuss native ARM64 compiler architecture and integration #1835, feat(aot): consolidate native ARM64 compiler, runtime and consumers #5021, fix(libc): follow measured wide printf behavior #5303, test: organize library tests and label CTest suites #6044, fix(libc): find a relinked module by stem when the exact name misses #6226, fix(memory): honor low guest mapping hints #6469, feat(libc): answer every libunwind cursor slot of an unwind context #6819, feat(wasm): run relinked titles in the browser with WebGPU #6879, fix(libs): share Sony CRT handler and lconv state between libc and libSceAmpr #7081, Macos port #7201, feat: macOS on Apple Silicon host support (Rosetta 2 and MoltenVK) #7332, feat(libc): scan 16-bit wide conversions on Linux #7386, perf(libc): skip write-watch queries for proven clean resident ranges #7473 and fix(libc): provide ASOBI_ROOT environment variable for title path resolution #7715: the Threads.cpp changes affect _Cnd_timedwait, the debt changes affect other entries, and test: organize library tests and label CTest suites #6044 moves GuestAmprThreads.cpp unchanged into tests/memory. No other PR implements this sleep fix. fix(libc): avoid coarse Windows C++ condition waits #7735 also merges independently.

Checklist

• Based on current main; no other open PR implements the same functions
• 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 under Silent stubs in their library's technical debt file
• No notes, investigation .md files or images added to the repository (attach them to this PR)
• New third-party code is a submodule built from source
• Generic behaviour, not specific to one title
• Depends on: none
• Fixes: none
• Unblocks: none
• GPUs tested: n/a
• AI-assisted: yes

[github-actions]

Some comparisons could not be completed because a pull request conflicts with the base branch. Review these shared files manually before concluding that there is no overlap.

Pull request	Shared files not compared
PR 1835	core/libs/prx/libc/src/Threads.cpp
PR 5021	core/libs/prx/libc/src/Threads.cpp docs/dev/debt/libc.md
PR 5303	docs/dev/debt/libc.md
PR 6044	core/libs/tests/GuestAmprThreads.cpp
PR 6226	docs/dev/debt/libc.md
PR 6469	docs/dev/debt/libc.md
PR 6819	docs/dev/debt/libc.md
PR 6879	core/libs/prx/libc/src/Threads.cpp
PR 7081	docs/dev/debt/libc.md
PR 7201	core/libs/prx/libc/src/Threads.cpp
PR 7332	docs/dev/debt/libc.md
PR 7386	docs/dev/debt/libc.md
PR 7447	docs/dev/debt/libc.md
PR 7473	docs/dev/debt/libc.md
PR 7715	docs/dev/debt/libc.md
PR 8037	docs/dev/debt/libc.md