author | Tero Marttila <terom@fixme.fi> |
Thu, 12 Mar 2009 18:07:47 +0200 | |
changeset 35 | 3715247e8f5a |
child 69 | 6f298b6e0d5f |
permissions | -rw-r--r-- |
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3715247e8f5a
add a kind of semi-generic chain-list implementation
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#include "chain.h" |
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#include <stdlib.h> |
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err_t chain_add (struct chain_list *list, const void *chain, void *arg) |
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{ |
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struct chain_head *item; |
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// allocate the chain item |
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if ((item = calloc(1, sizeof(*item))) == NULL) |
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return ERR_CALLOC; |
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// store |
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item->chain = chain; |
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item->arg = arg; |
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// append |
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STAILQ_INSERT_TAIL(list, item, node); |
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// ok |
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return SUCCESS; |
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} |
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void chain_free (struct chain_list *list) |
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{ |
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// start from the first item |
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struct chain_head *next = STAILQ_FIRST(list); |
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// clean up any handler chains |
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while (next) { |
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struct chain_head *node = next; |
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// update next |
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next = STAILQ_NEXT(node, node); |
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// free |
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free(node); |
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} |
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} |