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Add multithreading module: odd-even, ping-pong, ordered threads, deadlock detection and fixes, virtual-thread variants (25 tests)

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Co-Authored-By: Claude Sonnet 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_017ic4b7rnC7jppGGdHGESvy
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Claude
2026-10-28 18:10:23 +00:00
parent f80e1079a8
commit 94306c50ab
29 changed files with 1021 additions and 0 deletions
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multithreading/scripts/run.sh
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#!/usr/bin/env bash
# Runs one demo: ./scripts/run.sh odd-even | ping-pong | ordered | deadlock | virtual
# Needs JDK 25 and Maven (Maven only to compile). The "virtual" demo is started with ONE carrier thread.
set -euo pipefail
cd "$(dirname "$0")/.."
mvn -B -q compile 2>&1 | grep -E 'ERROR' || true
FLAGS=(-Xmx256m)
if [ "${1:-}" = "virtual" ]; then
FLAGS+=(-Djdk.virtualThreadScheduler.parallelism=1 -Djdk.virtualThreadScheduler.maxPoolSize=1)
fi
java "${FLAGS[@]}" -cp target/classes com.ankurm.interviewlab.multithreading.Demo "$1" 2>&1 | grep -v '^Picked up JAVA_TOOL_OPTIONS'