Chapter 2 (English)

9. Condition

Operating system (OS) conditions refer to the necessary states, requirements, and environmental factors for an OS to function, manage resources, and prevent deadlocks. These include process states (Ready, Running, Blocked), synchronization primitives like condition variables, and necessary deadlock conditions (Mutual Exclusion, Hold and Wait, No Preemption, Circular Wait). 

GeeksforGeeks +4

• Deadlock Conditions: For a deadlock to occur, four conditions must hold: Mutual Exclusion (non-shareable resources), Hold and Wait (holding resources while waiting for others), No Preemption (resources cannot be forcibly taken), and Circular Wait.
• Process States: An OS manages processes by tracking their condition, typically in a 5-state model: New, Ready, Running, Waiting (Blocked), and Terminated.
• Synchronization Conditions: Condition variables are used in multi-threaded OS environments (e.g., Linux Pthreads) to allow threads to wait for a specific condition to become true, preventing race conditions.
• System Resource Conditions: The OS ensures efficient resource utilization, handling scenarios like idle CPU time during I/O operations.
• Environment/Context Condition: In software deployment, an "Operating System Condition" can refer to a check ensuring the client is running a specific OS (e.g., Windows, Linux) to determine which actions to take.