Site S, executes the following three steps to invoke mutual exclusion: Step 1: (Request Critical Section) Requesting = true; C₁ = C₁ + 1; Send REQUEST(C₁, i) message to all sites in R;; Wait until R₂ = 0); Requesting false; Step 2: (Execute Critical Section) Executing = true; Execute CS; Executing = false; Step 3: (Release Critical Section) /* Wait until all sites in R, have sent a reply to S, */ For every site S in I, (except S₁) do Begin End I= I₁ - {Sk}; Send REPLY (C₁, i) message to Ski R₁= R₁ + {Sk}
Site S, executes the following three steps to invoke mutual exclusion: Step 1: (Request Critical Section) Requesting = true; C₁ = C₁ + 1; Send REQUEST(C₁, i) message to all sites in R;; Wait until R₂ = 0); Requesting false; Step 2: (Execute Critical Section) Executing = true; Execute CS; Executing = false; Step 3: (Release Critical Section) /* Wait until all sites in R, have sent a reply to S, */ For every site S in I, (except S₁) do Begin End I= I₁ - {Sk}; Send REPLY (C₁, i) message to Ski R₁= R₁ + {Sk}
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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