Consider the following multi-threaded pseudocode. Thread A: 1. lock (& mutex); 2. if( queue empty ()) { 3. cond_wait (&cv, & mutex); 4.] 5. data = queue.pop(): 6. unlock (& mutex); Thread B: 1. lock (& mutex); 2. queue insert (data); 3. cond signal (& cv); 4. unlock (& mutex); A. Thread A Line 2 B. Thread A Line 3 C. Thread B Line 2 D. Thread B Line 3 E. No bugs
Consider the following multi-threaded pseudocode. Thread A: 1. lock (& mutex); 2. if( queue empty ()) { 3. cond_wait (&cv, & mutex); 4.] 5. data = queue.pop(): 6. unlock (& mutex); Thread B: 1. lock (& mutex); 2. queue insert (data); 3. cond signal (& cv); 4. unlock (& mutex); A. Thread A Line 2 B. Thread A Line 3 C. Thread B Line 2 D. Thread B Line 3 E. No bugs
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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Can you help me with question 4
![Consider the following multi-threaded pseudocode.
Thread A:
1. lock (& mutex);
2. if( queue empty ()) {
3. cond_wait (&cv, & mutex);
4.]
5. data = queue.pop():
6. unlock (& mutex);
Thread B:
1. lock (& mutex);
2. queue insert (data);
3. cond signal (& cv);
4. unlock (& mutex);](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F7c7a9c2d-7e21-4f8b-b1a6-1c46011f548b%2Fcfde709b-054a-4826-a13c-9c28f6ffa8dc%2F8xjbf_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Consider the following multi-threaded pseudocode.
Thread A:
1. lock (& mutex);
2. if( queue empty ()) {
3. cond_wait (&cv, & mutex);
4.]
5. data = queue.pop():
6. unlock (& mutex);
Thread B:
1. lock (& mutex);
2. queue insert (data);
3. cond signal (& cv);
4. unlock (& mutex);
Transcribed Image Text:A. Thread A Line 2
B. Thread A Line 3
C. Thread B Line 2
D. Thread B Line 3
E. No bugs
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