1 /* Copyright (c) 2004, 2005, 2006, 2007, 2008, 2009, 2010. The SimGrid Team.
2 * All rights reserved. */
4 /* This program is free software; you can redistribute it and/or modify it
5 * under the terms of the license (GNU LGPL) which comes with this package. */
7 /* Warning, this module is done to be efficient and performs tons of
8 cast and dirty things. So avoid using it unless you really know
11 /* This type should be added to a type that is to be used in such a swag */
13 #include "xbt/sysdep.h"
18 /** Creates a new swag.
19 * \param offset where the hookup is located in the structure
20 * \see xbt_swag_offset
22 * Usage : xbt_swag_new(&obj.setA-&obj);
24 XBT_INLINE xbt_swag_t xbt_swag_new(size_t offset)
26 xbt_swag_t swag = xbt_new0(s_xbt_swag_t, 1);
28 xbt_swag_init(swag, offset);
34 * \param swag poor victim
36 * kilkil a swag but not it's content. If you do not understand why
37 * xbt_swag_free should not free its content, don't use swags.
39 XBT_INLINE void xbt_swag_free(xbt_swag_t swag)
44 /** Creates a new swag.
45 * \param swag the swag to initialize
46 * \param offset where the hookup is located in the structure
47 * \see xbt_swag_offset
49 * Usage : xbt_swag_init(swag,&obj.setA-&obj);
51 XBT_INLINE void xbt_swag_init(xbt_swag_t swag, size_t offset)
55 swag->offset = offset;
61 * \param obj the objet to insert in the swag
64 * insert \a obj in \a swag
66 XBT_INLINE void xbt_swag_insert(void *obj, xbt_swag_t swag)
69 if (xbt_swag_belongs(obj, swag))
73 if (swag->head == NULL) {
74 xbt_assert0(!(swag->tail), "Inconsistent swag.");
80 xbt_swag_getPrev(obj, swag->offset) = swag->tail;
81 xbt_swag_getNext(xbt_swag_getPrev(obj, swag->offset), swag->offset) =
88 * \param obj the objet to insert in the swag
91 * insert (at the head... you probably had a very good reason to do
92 * that, I hope you know what you're doing) \a obj in \a swag
94 XBT_INLINE void xbt_swag_insert_at_head(void *obj, xbt_swag_t swag)
97 if (xbt_swag_belongs(obj, swag))
101 if (swag->head == NULL) {
102 xbt_assert0(!(swag->tail), "Inconsistent swag.");
108 xbt_swag_getNext(obj, swag->offset) = swag->head;
109 xbt_swag_getPrev(xbt_swag_getNext(obj, swag->offset), swag->offset) =
116 * \param obj the objet to insert in the swag
119 * insert (at the tail... you probably had a very good reason to do
120 * that, I hope you know what you're doing) \a obj in \a swag
122 XBT_INLINE void xbt_swag_insert_at_tail(void *obj, xbt_swag_t swag)
125 if (xbt_swag_belongs(obj, swag))
129 if (swag->head == NULL) {
130 xbt_assert0(!(swag->tail), "Inconsistent swag.");
136 xbt_swag_getPrev(obj, swag->offset) = swag->tail;
137 xbt_swag_getNext(xbt_swag_getPrev(obj, swag->offset), swag->offset) =
144 * \param obj the objet to remove from the swag
146 * \return \a obj if it was in the \a swag and NULL otherwise
148 * removes \a obj from \a swag
150 XBT_INLINE void *xbt_swag_remove(void *obj, xbt_swag_t swag)
152 size_t offset = swag->offset;
154 if ((!obj) || (!swag))
156 if (!xbt_swag_belongs(obj, swag)) /* Trying to remove an object that
157 was not in this swag */
160 if (swag->head == swag->tail) { /* special case */
161 if (swag->head != obj) /* Trying to remove an object that was not in this swag */
165 xbt_swag_getNext(obj, offset) = xbt_swag_getPrev(obj, offset) = NULL;
166 } else if (obj == swag->head) { /* It's the head */
167 swag->head = xbt_swag_getNext(obj, offset);
168 xbt_swag_getPrev(swag->head, offset) = NULL;
169 xbt_swag_getNext(obj, offset) = NULL;
170 } else if (obj == swag->tail) { /* It's the tail */
171 swag->tail = xbt_swag_getPrev(obj, offset);
172 xbt_swag_getNext(swag->tail, offset) = NULL;
173 xbt_swag_getPrev(obj, offset) = NULL;
174 } else { /* It's in the middle */
175 xbt_swag_getNext(xbt_swag_getPrev(obj, offset), offset) =
176 xbt_swag_getNext(obj, offset);
177 xbt_swag_getPrev(xbt_swag_getNext(obj, offset), offset) =
178 xbt_swag_getPrev(obj, offset);
179 xbt_swag_getPrev(obj, offset) = xbt_swag_getNext(obj, offset) = NULL;
187 * \return an object from the \a swag
189 void *xbt_swag_extract(xbt_swag_t swag)
191 size_t offset = swag->offset;
194 if ((!swag) || (!(swag->head)))
199 if (swag->head == swag->tail) { /* special case */
200 swag->head = swag->tail = NULL;
201 xbt_swag_getPrev(obj, offset) = xbt_swag_getNext(obj, offset) = NULL;
203 swag->head = xbt_swag_getNext(obj, offset);
204 xbt_swag_getPrev(swag->head, offset) = NULL;
205 xbt_swag_getNext(obj, offset) = NULL;
214 * \return the number of objects in \a swag
216 XBT_INLINE int xbt_swag_size(xbt_swag_t swag)
218 return (swag->count);
224 XBT_TEST_SUITE("swag", "Swag data container");
227 s_xbt_swag_hookup_t setA;
228 s_xbt_swag_hookup_t setB;
230 } shmurtz, s_shmurtz_t, *shmurtz_t;
233 XBT_TEST_UNIT("basic", test_swag_basic, "Basic usage")
235 shmurtz_t obj1, obj2, obj;
236 xbt_swag_t setA, setB;
238 obj1 = xbt_new0(s_shmurtz_t, 1);
239 obj2 = xbt_new0(s_shmurtz_t, 1);
241 obj1->name = "Obj 1";
242 obj2->name = "Obj 2";
244 xbt_test_add0("Basic usage");
245 xbt_test_log3("%p %p %ld\n", obj1, &(obj1->setB),
246 (long) ((char *) &(obj1->setB) - (char *) obj1));
248 setA = xbt_swag_new(xbt_swag_offset(*obj1, setA));
249 setB = xbt_swag_new(xbt_swag_offset(*obj1, setB));
251 xbt_swag_insert(obj1, setA);
252 xbt_swag_insert(obj1, setB);
253 xbt_swag_insert(obj2, setA);
254 xbt_swag_insert(obj2, setB);
256 xbt_swag_remove(obj1, setB);
257 /* xbt_swag_remove(obj2, setB); */
259 xbt_test_add0("Traverse set A");
260 xbt_swag_foreach(obj, setA) {
261 xbt_test_log1("Saw: %s", obj->name);
264 xbt_test_add0("Traverse set B");
265 xbt_swag_foreach(obj, setB) {
266 xbt_test_log1("Saw: %s", obj->name);
269 xbt_test_add0("Ensure set content and length");
270 xbt_test_assert(xbt_swag_belongs(obj1, setA));
271 xbt_test_assert(xbt_swag_belongs(obj2, setA));
273 xbt_test_assert(!xbt_swag_belongs(obj1, setB));
274 xbt_test_assert(xbt_swag_belongs(obj2, setB));
276 xbt_test_assert(xbt_swag_size(setA) == 2);
277 xbt_test_assert(xbt_swag_size(setB) == 1);
283 #endif /* SIMGRID_TEST */