/* A queue definition based on sys/queue.h TAILQ definitions * * Copyright 2000 Peter Hunnisett * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA * * NOTES * o Linked list implementation for dplay/dplobby. Based off of the BSD * version found in * o Port it to ? * */ #ifndef __WINE_DPLAYX_QUEUE_H #define __WINE_DPLAYX_QUEUE_H #include #include "windef.h" #include "winbase.h" #define DPQ_INSERT(a,b,c) DPQ_INSERT_IN_TAIL(a,b,c) /* * Tail queue definitions. */ #define DPQ_HEAD(type) \ struct { \ struct type *lpQHFirst; /* first element */ \ struct type **lpQHLast; /* addr of last next element */ \ } #define DPQ_ENTRY(type) \ struct { \ struct type *lpQNext; /* next element */ \ struct type **lpQPrev; /* address of previous next element */ \ } /* * Tail queue functions. */ #define DPQ_INIT(head) \ do{ \ (head).lpQHFirst = NULL; \ (head).lpQHLast = &(head).lpQHFirst; \ } while(0) /* Front of the queue */ #define DPQ_FIRST( head ) ( (head).lpQHFirst ) /* Check if the queue has any elements */ #define DPQ_IS_EMPTY( head ) ( DPQ_FIRST(head) == NULL ) /* Next entry -- FIXME: Convert everything over to this macro ... */ #define DPQ_NEXT( elem ) (elem).lpQNext #define DPQ_IS_ENDOFLIST( elem ) \ ( DPQ_NEXT(elem) == NULL ) /* Insert element at end of queue */ #define DPQ_INSERT_IN_TAIL(head, elm, field) \ do { \ (elm)->field.lpQNext = NULL; \ (elm)->field.lpQPrev = (head).lpQHLast; \ *(head).lpQHLast = (elm); \ (head).lpQHLast = &(elm)->field.lpQNext; \ } while(0) /* Remove element from the queue */ #define DPQ_REMOVE(head, elm, field) \ do { \ if (((elm)->field.lpQNext) != NULL) \ (elm)->field.lpQNext->field.lpQPrev = \ (elm)->field.lpQPrev; \ else \ (head).lpQHLast = (elm)->field.lpQPrev; \ *(elm)->field.lpQPrev = (elm)->field.lpQNext; \ } while(0) /* head - pointer to DPQ_HEAD struct * elm - how to find the next element * field - to be concatenated to rc to compare with fieldToCompare * fieldToCompare - The value that we're comparing against * fieldCompareOperator - The logical operator to compare field and * fieldToCompare. * rc - Variable to put the return code. Same type as (head).lpQHFirst */ #define DPQ_FIND_ENTRY( head, elm, field, fieldCompareOperator, fieldToCompare, rc )\ do { \ (rc) = DPQ_FIRST(head); /* NULL head? */ \ \ while( rc ) \ { \ /* What we're searching for? */ \ if( (rc)->field fieldCompareOperator (fieldToCompare) ) \ { \ break; /* rc == correct element */ \ } \ \ /* End of list check */ \ if( ( (rc) = (rc)->elm.lpQNext ) == (head).lpQHFirst ) \ { \ rc = NULL; \ break; \ } \ } \ } while(0) /* head - pointer to DPQ_HEAD struct * elm - how to find the next element * field - to be concatenated to rc to compare with fieldToCompare * fieldToCompare - The value that we're comparing against * compare_cb - Callback to invoke to determine if comparison should continue. * Callback must be defined with DPQ_DECL_COMPARECB. * rc - Variable to put the return code. Same type as (head).lpQHFirst */ #define DPQ_FIND_ENTRY_CB( head, elm, field, compare_cb, fieldToCompare, rc )\ do { \ (rc) = DPQ_FIRST(head); /* NULL head? */ \ \ while( rc ) \ { \ /* What we're searching for? */ \ if( compare_cb( &((rc)->field), &(fieldToCompare) ) ) \ { \ break; /* no more */ \ } \ \ /* End of list check */ \ if( ( (rc) = (rc)->elm.lpQNext ) == (head).lpQHFirst ) \ { \ rc = NULL; \ break; \ } \ } \ } while(0) /* How to define the method to be passed to DPQ_DELETEQ */ #define DPQ_DECL_COMPARECB( name, type ) BOOL name( const type* elem1, const type* elem2 ) /* head - pointer to DPQ_HEAD struct * elm - how to find the next element * field - to be concatenated to rc to compare with fieldToEqual * fieldToCompare - The value that we're comparing against * fieldCompareOperator - The logical operator to compare field and * fieldToCompare. * rc - Variable to put the return code. Same type as (head).lpQHFirst */ #define DPQ_REMOVE_ENTRY( head, elm, field, fieldCompareOperator, fieldToCompare, rc )\ do { \ DPQ_FIND_ENTRY( head, elm, field, fieldCompareOperator, fieldToCompare, rc );\ \ /* Was the element found? */ \ if( rc ) \ { \ DPQ_REMOVE( head, rc, elm ); \ } \ } while(0) /* head - pointer to DPQ_HEAD struct * elm - how to find the next element * field - to be concatenated to rc to compare with fieldToCompare * fieldToCompare - The value that we're comparing against * compare_cb - Callback to invoke to determine if comparison should continue. * Callback must be defined with DPQ_DECL_COMPARECB. * rc - Variable to put the return code. Same type as (head).lpQHFirst */ #define DPQ_REMOVE_ENTRY_CB( head, elm, field, compare_cb, fieldToCompare, rc )\ do { \ DPQ_FIND_ENTRY_CB( head, elm, field, compare_cb, fieldToCompare, rc );\ \ /* Was the element found? */ \ if( rc ) \ { \ DPQ_REMOVE( head, rc, elm ); \ } \ } while(0) /* Delete the entire queue * head - pointer to the head of the queue * field - field to access the next elements of the queue * type - type of the pointer to the element element * df - a delete function to be called. Declared with DPQ_DECL_DELETECB. */ #define DPQ_DELETEQ( head, field, type, df ) \ do \ { \ while( !DPQ_IS_EMPTY(head) ) \ { \ type holder = DPQ_FIRST(head); \ DPQ_REMOVE( head, holder, field ); \ df( holder ); \ } \ } while(0) /* How to define the method to be passed to DPQ_DELETEQ */ #define DPQ_DECL_DELETECB( name, type ) void name( type elem ) /* Prototype of a method which just performs a HeapFree on the elem */ DPQ_DECL_DELETECB( cbDeleteElemFromHeap, LPVOID ) DECLSPEC_HIDDEN; #endif /* __WINE_DPLAYX_QUEUE_H */