Hi,
when I have a circular buffer like:
struct circular_buf {
char buf[];
volatile int head, tail;
};
And I have one producer and one consumer.
The producer modifies the head and reads tail.
The consumer modifies the tail and reads head.
Producer and consumer are executed in different threads.
Is it sufficient to qualify head and tail with volatile or is some
kind of locking needed?
(When I transfer this example to user space and pthreads
proper locking is needed (mem sync) -- in this domain volatile is despised.
How is this with the kernel?)
/FAU
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