[SDKv2] resumable downloads (cross-process lock + per-chunk state + linked cancellation)#793

Open

bmehta001 wants to merge 47 commits into

mainfrom

bhamehta/flcore/resumable-downloads

Commits on Jun 18, 2026

sdk_v2/cpp: cross-process lock + skip-existing for downloads

bmehta001
and
Copilot
committed
sdk_v2/cpp: per-chunk resumable downloads with linked cancellation

bmehta001
and
Copilot
committed
Stream blob chunks via per-worker scratch + IFileWriter (caps per-worker memory at 64 KB)

bmehta001
and
Copilot
committed
Fix Linux/macOS -Werror build break + MutexFstream sticky-failbit

bmehta001
and
Copilot
committed
Preserve resume progress on transient stat / rename failures

bmehta001
and
Copilot
committed
CrossProcessFileLock: drop self-cleanup; persist lock file across releases

bmehta001
and
Copilot
committed
Revert "CrossProcessFileLock: drop self-cleanup; persist lock file across releases"
bmehta001
committed
refactor(download): collapse file writer to a single concrete FileWriter

bmehta001
and
Copilot
committed
fix(download): per-model serialization + airtight cross-process lock

bmehta001
and
Copilot
committed
fixup(rebase): resolve semantic conflicts against main's download refactor

bmehta001
and
Copilot
committed
fix(download): correct SaveState prefix advance across a 64-bit word boundary

bmehta001
and
Copilot
committed
fix(download): persist sidecar before pre-allocating, so a crash stays resumable

bmehta001
and
Copilot
committed
fix(download): serialize the user progress callback across chunk workers

bmehta001
and
Copilot
committed
feat(download): also flush the resume sidecar on a wall-clock cap

bmehta001
and
Copilot
committed
Fix comment
bmehta001
authored
download: clarify state-sidecar serialization naming and docs

bmehta001
and
Copilot
committed
download: fixed-size sidecar interval; drop test-only cancel plumbing

bmehta001
and
Copilot
committed
Rename function
bmehta001
authored
test(download): add a true cross-process lock test (POSIX)

bmehta001
and
Copilot
committed

Commits on Jun 19, 2026

Commits on Jun 20, 2026

Commits on Jun 25, 2026

Commits on Jun 26, 2026