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ea863ec6f7
The 'struct fifo' and it's accompanying #defines do not belong in lib/zebra.h. Move them into their own header. Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com> (cherry picked from commit b0d02889624eaafa0984873dcd78c086418bdf13)
63 lines
2.2 KiB
C
63 lines
2.2 KiB
C
/* FIFO common header.
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Copyright (C) 2015 Kunihiro Ishiguro
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This file is part of Quagga.
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Quagga is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 2, or (at your option) any
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later version.
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Quagga is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Zebra; see the file COPYING. If not, write to the Free
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Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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02111-1307, USA. */
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#ifndef __LIB_FIFO_H__
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#define __LIB_FIFO_H__
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/* FIFO -- first in first out structure and macros. */
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struct fifo
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{
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struct fifo *next;
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struct fifo *prev;
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};
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#define FIFO_INIT(F) \
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do { \
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struct fifo *Xfifo = (struct fifo *)(F); \
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Xfifo->next = Xfifo->prev = Xfifo; \
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} while (0)
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#define FIFO_ADD(F,N) \
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do { \
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struct fifo *Xfifo = (struct fifo *)(F); \
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struct fifo *Xnode = (struct fifo *)(N); \
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Xnode->next = Xfifo; \
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Xnode->prev = Xfifo->prev; \
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Xfifo->prev = Xfifo->prev->next = Xnode; \
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} while (0)
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#define FIFO_DEL(N) \
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do { \
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struct fifo *Xnode = (struct fifo *)(N); \
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Xnode->prev->next = Xnode->next; \
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Xnode->next->prev = Xnode->prev; \
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} while (0)
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#define FIFO_HEAD(F) \
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((((struct fifo *)(F))->next == (struct fifo *)(F)) \
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? NULL : (F)->next)
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#define FIFO_EMPTY(F) \
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(((struct fifo *)(F))->next == (struct fifo *)(F))
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#define FIFO_TOP(F) \
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(FIFO_EMPTY(F) ? NULL : ((struct fifo *)(F))->next)
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#endif /* __LIB_FIFO_H__ */
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