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1 | /** |
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2 | * @file |
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3 | * |
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4 | * @brief Initialize a Chain Header |
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5 | * |
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6 | * @ingroup ScoreChain |
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7 | */ |
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8 | |
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9 | /* |
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10 | * COPYRIGHT (c) 1989-2007. |
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11 | * On-Line Applications Research Corporation (OAR). |
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12 | * |
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13 | * The license and distribution terms for this file may be |
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14 | * found in the file LICENSE in this distribution or at |
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15 | * http://www.rtems.org/license/LICENSE. |
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16 | */ |
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17 | |
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18 | #if HAVE_CONFIG_H |
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19 | #include "config.h" |
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20 | #endif |
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21 | |
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22 | #include <rtems/score/chainimpl.h> |
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23 | #include <rtems/score/address.h> |
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24 | #include <rtems/score/assert.h> |
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25 | |
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26 | void _Chain_Initialize( |
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27 | Chain_Control *the_chain, |
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28 | void *starting_address, |
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29 | size_t number_nodes, |
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30 | size_t node_size |
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31 | ) |
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32 | { |
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33 | size_t count = number_nodes; |
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34 | Chain_Node *head = _Chain_Head( the_chain ); |
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35 | Chain_Node *tail = _Chain_Tail( the_chain ); |
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36 | Chain_Node *current = head; |
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37 | Chain_Node *next = starting_address; |
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38 | |
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39 | _Assert( node_size >= sizeof( *next ) ); |
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40 | |
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41 | head->previous = NULL; |
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42 | |
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43 | while ( count-- ) { |
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44 | current->next = next; |
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45 | next->previous = current; |
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46 | current = next; |
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47 | next = (Chain_Node *) |
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48 | _Addresses_Add_offset( (void *) next, node_size ); |
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49 | } |
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50 | |
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51 | current->next = tail; |
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52 | tail->previous = current; |
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53 | } |
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