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lib: Include libuv circularly linked list

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This is simpler and more efficient than klist.h for implementing queues that
support insertion or removal at arbitrary positions.
This commit is contained in:
Thiago de Arruda 2015-07-24 12:24:16 -03:00
parent 0d71354058
commit 1a7a020b68
2 changed files with 93 additions and 0 deletions
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1
clint-ignored-files.txt
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@ -57,6 +57,7 @@ src/nvim/keymap.h
src/nvim/lib/khash.h
src/nvim/lib/klist.h
src/nvim/lib/kvec.h
src/nvim/lib/queue.h
src/nvim/macros.h
src/nvim/main.c
src/nvim/main.h

92
src/nvim/lib/queue.h Normal file
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@ -0,0 +1,92 @@
/* Copyright (c) 2013, Ben Noordhuis <info@bnoordhuis.nl>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#ifndef QUEUE_H_
#define QUEUE_H_
typedef void *QUEUE[2];
/* Private macros. */
#define QUEUE_NEXT(q) (*(QUEUE **) &((*(q))[0]))
#define QUEUE_PREV(q) (*(QUEUE **) &((*(q))[1]))
#define QUEUE_PREV_NEXT(q) (QUEUE_NEXT(QUEUE_PREV(q)))
#define QUEUE_NEXT_PREV(q) (QUEUE_PREV(QUEUE_NEXT(q)))
/* Public macros. */
#define QUEUE_DATA(ptr, type, field) \
((type *) ((char *) (ptr) - ((char *) &((type *) 0)->field)))
#define QUEUE_FOREACH(q, h) \
for ((q) = QUEUE_NEXT(h); (q) != (h); (q) = QUEUE_NEXT(q))
#define QUEUE_EMPTY(q) \
((const QUEUE *) (q) == (const QUEUE *) QUEUE_NEXT(q))
#define QUEUE_HEAD(q) \
(QUEUE_NEXT(q))
#define QUEUE_INIT(q) \
do { \
QUEUE_NEXT(q) = (q); \
QUEUE_PREV(q) = (q); \
} \
while (0)
#define QUEUE_ADD(h, n) \
do { \
QUEUE_PREV_NEXT(h) = QUEUE_NEXT(n); \
QUEUE_NEXT_PREV(n) = QUEUE_PREV(h); \
QUEUE_PREV(h) = QUEUE_PREV(n); \
QUEUE_PREV_NEXT(h) = (h); \
} \
while (0)
#define QUEUE_SPLIT(h, q, n) \
do { \
QUEUE_PREV(n) = QUEUE_PREV(h); \
QUEUE_PREV_NEXT(n) = (n); \
QUEUE_NEXT(n) = (q); \
QUEUE_PREV(h) = QUEUE_PREV(q); \
QUEUE_PREV_NEXT(h) = (h); \
QUEUE_PREV(q) = (n); \
} \
while (0)
#define QUEUE_INSERT_HEAD(h, q) \
do { \
QUEUE_NEXT(q) = QUEUE_NEXT(h); \
QUEUE_PREV(q) = (h); \
QUEUE_NEXT_PREV(q) = (q); \
QUEUE_NEXT(h) = (q); \
} \
while (0)
#define QUEUE_INSERT_TAIL(h, q) \
do { \
QUEUE_NEXT(q) = (h); \
QUEUE_PREV(q) = QUEUE_PREV(h); \
QUEUE_PREV_NEXT(q) = (q); \
QUEUE_PREV(h) = (q); \
} \
while (0)
#define QUEUE_REMOVE(q) \
do { \
QUEUE_PREV_NEXT(q) = QUEUE_NEXT(q); \
QUEUE_NEXT_PREV(q) = QUEUE_PREV(q); \
} \
while (0)
#endif /* QUEUE_H_ */