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Code Issues Releases Wiki Activity

remove ISC_QUEUE as it is no longer used

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This commit is contained in:
Evan Hunt 2019-11-05 16:39:58 -08:00
parent 53f0b6c34d
commit b9a5508e52
15 changed files with 9 additions and 338 deletions
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4
doc/dev/dev.md
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@ -654,10 +654,6 @@ Items can be removed from the list using `ISC_LIST_UNLINK`:
ISC_LIST_UNLINK(foolist, foo, link);
A similar but smaller set of `ISC_QUEUE` macros, including `ISC_QUEUE_PUSH`
and `ISC_QUEUE_POP`, are provided to implement strict FIFO lists, with
built-in fine-grained locking.
#### <a name="names"></a>Names
The `dns_name` API has facilities for processing DNS names and labels,

1
lib/dns/include/dns/fixedname.h
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@ -51,7 +51,6 @@
#include <isc/buffer.h>
#include <isc/lang.h>
#include <isc/list.h>
#include <dns/name.h>

1
lib/isc/app.c
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@ -29,7 +29,6 @@
#include <isc/atomic.h>
#include <isc/app.h>
#include <isc/condition.h>
#include <isc/list.h>
#include <isc/mem.h>
#include <isc/mutex.h>
#include <isc/event.h>

1
lib/isc/include/isc/buffer.h
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@ -105,7 +105,6 @@
#include <isc/assertions.h>
#include <isc/formatcheck.h>
#include <isc/lang.h>
#include <isc/list.h>
#include <isc/likely.h>
#include <isc/magic.h>
#include <isc/types.h>

1
lib/isc/include/isc/event.h
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@ -16,7 +16,6 @@
/*! \file isc/event.h */
#include <isc/lang.h>
#include <isc/list.h>
#include <isc/types.h>
/*****

146
lib/isc/include/isc/list.h
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@ -9,14 +9,11 @@
* information regarding copyright ownership.
*/
#ifndef ISC_LIST_H
#define ISC_LIST_H 1
#include <stdbool.h>
#include <isc/assertions.h>
#include <isc/mutex.h>
#include <isc/types.h>
#ifdef ISC_LIST_CHECKINIT
#define ISC_LINK_INSIST(x) ISC_INSIST(x)
@ -24,6 +21,7 @@
#define ISC_LINK_INSIST(x)
#endif
#define ISC_LIST(type) struct { type *head, *tail; }
#define ISC_LIST_INIT(list) \
do { (list).head = NULL; (list).tail = NULL; } while (0)
@ -191,144 +189,4 @@
#define __ISC_LIST_DEQUEUEUNSAFE_TYPE(list, elt, link, type) \
__ISC_LIST_UNLINKUNSAFE_TYPE(list, elt, link, type)
/*
* This is a generic implementation of a two-lock concurrent queue.
* There are built-in mutex locks for the head and tail of the queue,
* allowing elements to be safely added and removed at the same time.
*
* NULL is "end of list"
* -1 is "not linked"
*/
#ifdef ISC_QUEUE_CHECKINIT
#define ISC_QLINK_INSIST(x) ISC_INSIST(x)
#else
#define ISC_QLINK_INSIST(x) (void)0
#endif
#define ISC_QLINK(type) struct { type *prev, *next; }
#define ISC_QLINK_INIT(elt, link) \
do { \
(elt)->link.next = (elt)->link.prev = (void *)(-1); \
} while(0)
#define ISC_QLINK_LINKED(elt, link) ((void*)(elt)->link.next != (void*)(-1))
#define ISC_QUEUE(type) struct { \
type *head, *tail; \
isc_mutex_t headlock, taillock; \
}
#define ISC_QUEUE_INIT(queue, link) \
do { \
isc_mutex_init(&(queue).taillock); \
isc_mutex_init(&(queue).headlock); \
(queue).tail = (queue).head = NULL; \
} while (0)
#define ISC_QUEUE_EMPTY(queue) ((queue).head == NULL)
#define ISC_QUEUE_DESTROY(queue) \
do { \
ISC_QLINK_INSIST(ISC_QUEUE_EMPTY(queue)); \
isc_mutex_destroy(&(queue).taillock); \
isc_mutex_destroy(&(queue).headlock); \
} while (0)
/*
* queues are meant to separate the locks at either end. For best effect, that
* means keeping the ends separate - i.e. non-empty queues work best.
*
* a push to an empty queue has to take the pop lock to update
* the pop side of the queue.
* Popping the last entry has to take the push lock to update
* the push side of the queue.
*
* The order is (pop, push), because a pop is presumably in the
* latency path and a push is when we're done.
*
* We do an MT hot test in push to see if we need both locks, so we can
* acquire them in order. Hopefully that makes the case where we get
* the push lock and find we need the pop lock (and have to release it) rare.
*
* > 1 entry - no collision, push works on one end, pop on the other
* 0 entry - headlock race
* pop wins - return(NULL), push adds new as both head/tail
* push wins - updates head/tail, becomes 1 entry case.
* 1 entry - taillock race
* pop wins - return(pop) sets head/tail NULL, becomes 0 entry case
* push wins - updates {head,tail}->link.next, pop updates head
* with new ->link.next and doesn't update tail
*
*/
#define ISC_QUEUE_PUSH(queue, elt, link) \
do { \
bool headlocked = false; \
ISC_QLINK_INSIST(!ISC_QLINK_LINKED(elt, link)); \
if ((queue).head == NULL) { \
LOCK(&(queue).headlock); \
headlocked = true; \
} \
LOCK(&(queue).taillock); \
if ((queue).tail == NULL && !headlocked) { \
UNLOCK(&(queue).taillock); \
LOCK(&(queue).headlock); \
LOCK(&(queue).taillock); \
headlocked = true; \
} \
(elt)->link.prev = (queue).tail; \
(elt)->link.next = NULL; \
if ((queue).tail != NULL) \
(queue).tail->link.next = (elt); \
(queue).tail = (elt); \
UNLOCK(&(queue).taillock); \
if (headlocked) { \
if ((queue).head == NULL) \
(queue).head = (elt); \
UNLOCK(&(queue).headlock); \
} \
} while (0)
#define ISC_QUEUE_POP(queue, link, ret) \
do { \
LOCK(&(queue).headlock); \
ret = (queue).head; \
while (ret != NULL) { \
if (ret->link.next == NULL) { \
LOCK(&(queue).taillock); \
if (ret->link.next == NULL) { \
(queue).head = (queue).tail = NULL; \
UNLOCK(&(queue).taillock); \
break; \
}\
UNLOCK(&(queue).taillock); \
} \
(queue).head = ret->link.next; \
(queue).head->link.prev = NULL; \
break; \
} \
UNLOCK(&(queue).headlock); \
if (ret != NULL) \
(ret)->link.next = (ret)->link.prev = (void *)(-1); \
} while(0)
#define ISC_QUEUE_UNLINK(queue, elt, link) \
do { \
ISC_QLINK_INSIST(ISC_QLINK_LINKED(elt, link)); \
LOCK(&(queue).headlock); \
LOCK(&(queue).taillock); \
if ((elt)->link.prev == NULL) \
(queue).head = (elt)->link.next; \
else \
(elt)->link.prev->link.next = (elt)->link.next; \
if ((elt)->link.next == NULL) \
(queue).tail = (elt)->link.prev; \
else \
(elt)->link.next->link.prev = (elt)->link.prev; \
UNLOCK(&(queue).taillock); \
UNLOCK(&(queue).headlock); \
(elt)->link.next = (elt)->link.prev = (void *)(-1); \
} while(0)
#endif /* ISC_LIST_H */

1
lib/isc/include/isc/sockaddr.h
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@ -18,7 +18,6 @@
#include <stdbool.h>
#include <isc/lang.h>
#include <isc/list.h>
#include <isc/net.h>
#include <isc/types.h>
#ifdef ISC_PLATFORM_HAVESYSUNH

11
lib/isc/include/isc/types.h
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@ -20,16 +20,15 @@
*/
#include <inttypes.h>
#include <stdbool.h>
#include <isc/lang.h>
#include <isc/offset.h>
/* Core Types. Alphabetized by defined type. */
/*
* Defined here so we don't need to include list.h.
* XXXDCL This is just for ISC_LIST and ISC_LINK, but gets all of the other
* list macros too.
*/
#define ISC_LIST(type) struct { type *head, *tail; }
#include <isc/list.h>
/* Core Types. Alphabetized by defined type. */
typedef struct isc_astack isc_astack_t; /*%< Array-based fast stack */
typedef struct isc_appctx isc_appctx_t; /*%< Application context */

1
lib/isc/tests/Kyuafile
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@ -16,7 +16,6 @@ tap_test_program{name='mem_test'}
tap_test_program{name='netaddr_test'}
tap_test_program{name='parse_test'}
tap_test_program{name='pool_test'}
tap_test_program{name='queue_test'}
tap_test_program{name='radix_test'}
tap_test_program{name='regex_test'}
tap_test_program{name='result_test'}

9
lib/isc/tests/Makefile.in
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@ -33,7 +33,7 @@ SRCS = isctest.c aes_test.c buffer_test.c \
counter_test.c crc64_test.c errno_test.c file_test.c hash_test.c \
heap_test.c hmac_test.c ht_test.c lex_test.c \
mem_test.c md_test.c netaddr_test.c parse_test.c pool_test.c \
queue_test.c radix_test.c random_test.c \
radix_test.c random_test.c \
regex_test.c result_test.c safe_test.c siphash_test.c sockaddr_test.c \
socket_test.c socket_test.c symtab_test.c task_test.c \
taskpool_test.c time_test.c timer_test.c
@ -46,7 +46,7 @@ TARGETS = aes_test@EXEEXT@ buffer_test@EXEEXT@ \
ht_test@EXEEXT@ \
lex_test@EXEEXT@ mem_test@EXEEXT@ md_test@EXEEXT@ \
netaddr_test@EXEEXT@ parse_test@EXEEXT@ pool_test@EXEEXT@ \
queue_test@EXEEXT@ radix_test@EXEEXT@ \
radix_test@EXEEXT@ \
random_test@EXEEXT@ regex_test@EXEEXT@ result_test@EXEEXT@ \
safe_test@EXEEXT@ siphash_test@EXEEXT@ sockaddr_test@EXEEXT@ socket_test@EXEEXT@ \
socket_test@EXEEXT@ symtab_test@EXEEXT@ task_test@EXEEXT@ \
@ -134,11 +134,6 @@ pool_test@EXEEXT@: pool_test.@O@ isctest.@O@ ${ISCDEPLIBS}
${LDFLAGS} -o $@ pool_test.@O@ isctest.@O@ \
${ISCLIBS} ${LIBS}
queue_test@EXEEXT@: queue_test.@O@ isctest.@O@ ${ISCDEPLIBS}
${LIBTOOL_MODE_LINK} ${PURIFY} ${CC} ${CFLAGS} \
${LDFLAGS} -o $@ queue_test.@O@ isctest.@O@ \
${ISCLIBS} ${LIBS}
radix_test@EXEEXT@: radix_test.@O@ isctest.@O@ ${ISCDEPLIBS}
${LIBTOOL_MODE_LINK} ${PURIFY} ${CC} ${CFLAGS} \
${LDFLAGS} -o $@ radix_test.@O@ isctest.@O@ \

167
lib/isc/tests/queue_test.c
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@ -1,167 +0,0 @@
/*
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* See the COPYRIGHT file distributed with this work for additional
* information regarding copyright ownership.
*/
#if HAVE_CMOCKA
#include <stdarg.h>
#include <stddef.h>
#include <setjmp.h>
#include <sched.h> /* IWYU pragma: keep */
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#define UNIT_TESTING
#include <cmocka.h>
#include <isc/list.h>
#include <isc/util.h>
#include "isctest.h"
static int
_setup(void **state) {
isc_result_t result;
UNUSED(state);
result = isc_test_begin(NULL, true, 0);
assert_int_equal(result, ISC_R_SUCCESS);
return (0);
}
static int
_teardown(void **state) {
UNUSED(state);
isc_test_end();
return (0);
}
typedef struct item item_t;
struct item {
int value;
ISC_QLINK(item_t) qlink;
};
typedef ISC_QUEUE(item_t) item_queue_t;
static void
item_init(item_t *item, int value) {
item->value = value;
ISC_QLINK_INIT(item, qlink);
}
/* Test UDP sendto/recv (IPv4) */
static void
queue_valid(void **state) {
item_queue_t queue;
item_t one, two, three, four, five;
item_t *p;
UNUSED(state);
ISC_QUEUE_INIT(queue, qlink);
item_init(&one, 1);
item_init(&two, 2);
item_init(&three, 3);
item_init(&four, 4);
item_init(&five, 5);
assert_true(ISC_QUEUE_EMPTY(queue));
ISC_QUEUE_POP(queue, qlink, p);
assert_null(p);
assert_false(ISC_QLINK_LINKED(&one, qlink));
ISC_QUEUE_PUSH(queue, &one, qlink);
assert_true(ISC_QLINK_LINKED(&one, qlink));
assert_false(ISC_QUEUE_EMPTY(queue));
ISC_QUEUE_POP(queue, qlink, p);
assert_non_null(p);
assert_int_equal(p->value, 1);
assert_true(ISC_QUEUE_EMPTY(queue));
assert_false(ISC_QLINK_LINKED(p, qlink));
ISC_QUEUE_PUSH(queue, p, qlink);
assert_false(ISC_QUEUE_EMPTY(queue));
assert_true(ISC_QLINK_LINKED(p, qlink));
assert_false(ISC_QLINK_LINKED(&two, qlink));
ISC_QUEUE_PUSH(queue, &two, qlink);
assert_true(ISC_QLINK_LINKED(&two, qlink));
assert_false(ISC_QLINK_LINKED(&three, qlink));
ISC_QUEUE_PUSH(queue, &three, qlink);
assert_true(ISC_QLINK_LINKED(&three, qlink));
assert_false(ISC_QLINK_LINKED(&four, qlink));
ISC_QUEUE_PUSH(queue, &four, qlink);
assert_true(ISC_QLINK_LINKED(&four, qlink));
assert_false(ISC_QLINK_LINKED(&five, qlink));
ISC_QUEUE_PUSH(queue, &five, qlink);
assert_true(ISC_QLINK_LINKED(&five, qlink));
/* Test unlink by removing one item from the middle */
ISC_QUEUE_UNLINK(queue, &three, qlink);
ISC_QUEUE_POP(queue, qlink, p);
assert_non_null(p);
assert_int_equal(p->value, 1);
ISC_QUEUE_POP(queue, qlink, p);
assert_non_null(p);
assert_int_equal(p->value, 2);
ISC_QUEUE_POP(queue, qlink, p);
assert_non_null(p);
assert_int_equal(p->value, 4);
ISC_QUEUE_POP(queue, qlink, p);
assert_non_null(p);
assert_int_equal(p->value, 5);
assert_null(queue.head);
assert_null(queue.tail);
assert_true(ISC_QUEUE_EMPTY(queue));
ISC_QUEUE_DESTROY(queue);
}
int
main(void) {
const struct CMUnitTest tests[] = {
cmocka_unit_test_setup_teardown(queue_valid,
_setup, _teardown),
};
return (cmocka_run_group_tests(tests, NULL, NULL));
}
#else /* HAVE_CMOCKA */
#include <stdio.h>
int
main(void) {
printf("1..0 # Skipped: cmocka not available\n");
return (0);
}
#endif

1
lib/ns/client.c
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@ -16,7 +16,6 @@
#include <isc/formatcheck.h>
#include <isc/fuzz.h>
#include <isc/hmac.h>
#include <isc/list.h>
#include <isc/mutex.h>
#include <isc/once.h>
#include <isc/nonce.h>

1
lib/ns/include/ns/client.h
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@ -58,7 +58,6 @@
#include <stdbool.h>
#include <isc/buffer.h>
#include <isc/list.h>
#include <isc/magic.h>
#include <isc/netmgr.h>
#include <isc/stdtime.h>

1
lib/ns/notify.c
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@ -9,7 +9,6 @@
* information regarding copyright ownership.
*/
#include <isc/list.h>
#include <isc/log.h>
#include <isc/print.h>

1
util/copyrights
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@ -2314,7 +2314,6 @@
./lib/isc/tests/netaddr_test.c C 2016,2018,2019
./lib/isc/tests/parse_test.c C 2012,2013,2016,2018,2019
./lib/isc/tests/pool_test.c C 2013,2016,2018,2019
./lib/isc/tests/queue_test.c C 2011,2012,2016,2018,2019
./lib/isc/tests/radix_test.c C 2014,2016,2018,2019
./lib/isc/tests/random_test.c C 2014,2015,2016,2017,2018,2019
./lib/isc/tests/regex_test.c C 2013,2015,2016,2018,2019