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Volatile Fields, Forcing Visibility of Actions - Lecture Notes | CMSC 433, Study notes of Programming Languages

Material Type: Notes; Professor: Hicks; Class: PROG LANG TECH & PDGMS; Subject: Computer Science; University: University of Maryland; Term: Unknown 1989;

Typology: Study notes

Pre 2010

Uploaded on 02/13/2009

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Download Volatile Fields, Forcing Visibility of Actions - Lecture Notes | CMSC 433 and more Study notes Programming Languages in PDF only on Docsity! 1 82 Quiz Time • Can this result in i=0 and j=0? 83 Doesn’t Seem Possible... • But this can happen! 2 84 How Can This Happen? • Compiler can reorder statements – Or keep values in registers • Processor can reorder them • On multi-processor, values not synchronized in global memory 85 When Are Actions Visible? Must be the same lock
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