3-同步与并发-同步1

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2019年10月

操作系统

Operating Systems

刘 川 意

副教授

哈尔滨工业大学（深圳）

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Module 3:

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Shared Variables in Threaded C Programs

! The answer is not as simple as “global variables are shared” and

“stack variables are private”

some instance of x.

! What is the memory model for threads?

! How are instances of variables mapped to memory?

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The mismatch between the conceptual

source of confusion and errors

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Example Program to Illustrate Sharing

Peer threads reference main thread’s stack

indirectly through global ptr variable

sharing.c