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> Usage Of Do{ }while(0)
vasanth
post Mar 8 2005, 04:18 AM
Post #1


Whats this Lie-nix Thing?
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Hello,
In the linux source code,we can see code which are enclosed by do{ statements; }while(0) .what is the use of this construct? will it not work without this do ..while construct.
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vasanth
post Mar 12 2005, 05:33 AM
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Whats this Lie-nix Thing?
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Group: Members
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Member No.: 4,701



HI,
iam including the code from the kernel where linux circular linked lists are initialized(include/linux/list.h)

#define INIT_LIST_HEAD(ptr) do {
(ptr)->next = (ptr); (ptr)->prev = (ptr);
} while (0)

why is do { }while(0) used here? what purpose does it serve?
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