| 1 | /* $NetBSD: gcq.h,v 1.2 2007/08/19 07:35:32 kiyohara Exp $ */ |
| 2 | /* |
| 3 | * Not (c) 2007 Matthew Orgass |
| 4 | * This file is public domain, meaning anyone can make any use of part or all |
| 5 | * of this file including copying into other works without credit. Any use, |
| 6 | * modified or not, is solely the responsibility of the user. If this file is |
| 7 | * part of a collection then use in the collection is governed by the terms of |
| 8 | * the collection. |
| 9 | */ |
| 10 | |
| 11 | /* |
| 12 | * Generic Circular Queues: Pointer arithmetic is used to recover the |
| 13 | * enclosing object. Merge operation is provided. Items can be multiply |
| 14 | * removed, but queue traversal requires separate knowledge of the queue head. |
| 15 | */ |
| 16 | |
| 17 | #ifndef _GCQ_H |
| 18 | #define _GCQ_H |
| 19 | |
| 20 | #ifdef _KERNEL |
| 21 | #include <sys/types.h> |
| 22 | #include <sys/null.h> |
| 23 | #include <lib/libkern/libkern.h> |
| 24 | #else |
| 25 | #include <stdbool.h> |
| 26 | #include <stdint.h> |
| 27 | #include <stddef.h> |
| 28 | #include <assert.h> |
| 29 | #endif |
| 30 | |
| 31 | #ifdef GCQ_USE_ASSERT |
| 32 | #define GCQ_ASSERT(x) assert(x) |
| 33 | #else |
| 34 | #ifdef _KERNEL |
| 35 | #define GCQ_ASSERT(x) KASSERT(x) |
| 36 | #else |
| 37 | #define GCQ_ASSERT(x) _DIAGASSERT(x) |
| 38 | #endif |
| 39 | #endif |
| 40 | |
| 41 | struct gcq { |
| 42 | struct gcq *q_next; |
| 43 | struct gcq *q_prev; |
| 44 | }; |
| 45 | |
| 46 | struct gcq_head { |
| 47 | struct gcq hq; |
| 48 | }; |
| 49 | |
| 50 | #define GCQ_INIT(q) { &(q), &(q) } |
| 51 | #define GCQ_INIT_HEAD(head) { GCQ_INIT((head).hq) } |
| 52 | |
| 53 | __attribute__((nonnull, always_inline)) static inline void |
| 54 | gcq_init(struct gcq *q) |
| 55 | { |
| 56 | q->q_next = q->q_prev = q; |
| 57 | } |
| 58 | |
| 59 | __attribute__((nonnull, const, warn_unused_result, always_inline)) |
| 60 | static inline struct gcq * |
| 61 | gcq_q(struct gcq *q) |
| 62 | { |
| 63 | return q; |
| 64 | } |
| 65 | |
| 66 | __attribute__((nonnull, const, warn_unused_result, always_inline)) |
| 67 | static inline struct gcq * |
| 68 | gcq_hq(struct gcq_head *head) |
| 69 | { |
| 70 | return (struct gcq *)head; |
| 71 | } |
| 72 | |
| 73 | __attribute__((nonnull, const, warn_unused_result, always_inline)) |
| 74 | static inline struct gcq_head * |
| 75 | gcq_head(struct gcq *q) |
| 76 | { |
| 77 | return (struct gcq_head *)q; |
| 78 | } |
| 79 | |
| 80 | __attribute__((nonnull, always_inline)) static inline void |
| 81 | gcq_init_head(struct gcq_head *head) |
| 82 | { |
| 83 | gcq_init(gcq_hq(head)); |
| 84 | } |
| 85 | |
| 86 | __attribute__((nonnull, pure, warn_unused_result, always_inline)) |
| 87 | static inline bool |
| 88 | gcq_onlist(struct gcq *q) |
| 89 | { |
| 90 | return (q->q_next != q); |
| 91 | } |
| 92 | |
| 93 | __attribute__((nonnull, pure, warn_unused_result, always_inline)) |
| 94 | static inline bool |
| 95 | gcq_empty(struct gcq_head *head) |
| 96 | { |
| 97 | return (!gcq_onlist(gcq_hq(head))); |
| 98 | } |
| 99 | |
| 100 | __attribute__((nonnull, pure, warn_unused_result, always_inline)) |
| 101 | static inline bool |
| 102 | gcq_linked(struct gcq *prev, struct gcq *next) |
| 103 | { |
| 104 | return (prev->q_next == next && next->q_prev == prev); |
| 105 | } |
| 106 | |
| 107 | __attribute__((nonnull, always_inline)) static inline void |
| 108 | gcq_insert_after(struct gcq *on, struct gcq *off) |
| 109 | { |
| 110 | struct gcq *on_next; |
| 111 | GCQ_ASSERT(off->q_next == off && off->q_prev == off); |
| 112 | on_next = on->q_next; |
| 113 | |
| 114 | off->q_prev = on; |
| 115 | off->q_next = on_next; |
| 116 | on_next->q_prev = off; |
| 117 | on->q_next = off; |
| 118 | } |
| 119 | |
| 120 | __attribute__((nonnull)) static inline void |
| 121 | gcq_insert_before(struct gcq *on, struct gcq *off) |
| 122 | { |
| 123 | struct gcq *on_prev; |
| 124 | GCQ_ASSERT(off->q_next == off && off->q_prev == off); |
| 125 | on_prev = on->q_prev; |
| 126 | |
| 127 | off->q_next = on; |
| 128 | off->q_prev = on_prev; |
| 129 | on_prev->q_next = off; |
| 130 | on->q_prev = off; |
| 131 | } |
| 132 | |
| 133 | __attribute__((nonnull, always_inline)) static inline void |
| 134 | gcq_insert_head(struct gcq_head *head, struct gcq *q) |
| 135 | { |
| 136 | gcq_insert_after(gcq_hq(head), q); |
| 137 | } |
| 138 | |
| 139 | __attribute__((nonnull, always_inline)) static inline void |
| 140 | gcq_insert_tail(struct gcq_head *head, struct gcq *q) |
| 141 | { |
| 142 | gcq_insert_before(gcq_hq(head), q); |
| 143 | } |
| 144 | |
| 145 | __attribute__((nonnull)) static inline void |
| 146 | gcq_tie(struct gcq *dst, struct gcq *src) |
| 147 | { |
| 148 | struct gcq *dst_next, *src_prev; |
| 149 | dst_next = dst->q_next; |
| 150 | src_prev = src->q_prev; |
| 151 | |
| 152 | src_prev->q_next = dst_next; |
| 153 | dst_next->q_prev = src_prev; |
| 154 | src->q_prev = dst; |
| 155 | dst->q_next = src; |
| 156 | } |
| 157 | |
| 158 | __attribute__((nonnull, always_inline)) static inline void |
| 159 | gcq_tie_after(struct gcq *dst, struct gcq *src) |
| 160 | { |
| 161 | GCQ_ASSERT(dst != src && dst->q_prev != src); |
| 162 | gcq_tie(dst, src); |
| 163 | } |
| 164 | |
| 165 | __attribute__((nonnull, always_inline)) static inline void |
| 166 | gcq_tie_before(struct gcq *dst, struct gcq *src) |
| 167 | { |
| 168 | gcq_tie_after(dst->q_prev, src); |
| 169 | } |
| 170 | |
| 171 | __attribute__((nonnull)) static inline struct gcq * |
| 172 | gcq_remove(struct gcq *q) |
| 173 | { |
| 174 | struct gcq *next, *prev; |
| 175 | next = q->q_next; |
| 176 | prev = q->q_prev; |
| 177 | |
| 178 | prev->q_next = next; |
| 179 | next->q_prev = prev; |
| 180 | gcq_init(q); |
| 181 | return q; |
| 182 | } |
| 183 | |
| 184 | #ifdef GCQ_UNCONDITIONAL_MERGE |
| 185 | __attribute__((nonnull)) static inline void |
| 186 | gcq_merge(struct gcq *dst, struct gcq *src) |
| 187 | { |
| 188 | GCQ_ASSERT(dst != src && dst->q_prev != src); |
| 189 | gcq_tie(dst, src); |
| 190 | gcq_tie(src, src); |
| 191 | } |
| 192 | |
| 193 | __attribute__((nonnull, always_inline)) static inline void |
| 194 | gcq_merge_head(struct gcq_head *dst, struct gcq_head *src) |
| 195 | { |
| 196 | gcq_merge(gcq_hq(dst), gcq_hq(src)); |
| 197 | } |
| 198 | |
| 199 | __attribute__((nonnull, always_inline)) static inline void |
| 200 | gcq_merge_tail(struct gcq_head *dst, struct gcq_head *src) |
| 201 | { |
| 202 | gcq_merge(gcq_hq(dst)->q_prev, gcq_hq(src)); |
| 203 | } |
| 204 | #else |
| 205 | __attribute__((nonnull)) static inline void |
| 206 | gcq_merge(struct gcq *dst, struct gcq *src) |
| 207 | { |
| 208 | struct gcq *dst_next, *src_prev, *src_next; |
| 209 | GCQ_ASSERT(dst != src && dst->q_prev != src); |
| 210 | |
| 211 | if (gcq_onlist(src)) { |
| 212 | dst_next = dst->q_next; |
| 213 | src_prev = src->q_prev; |
| 214 | src_next = src->q_next; |
| 215 | |
| 216 | dst_next->q_prev = src_prev; |
| 217 | src_prev->q_next = dst_next; |
| 218 | dst->q_next = src_next; |
| 219 | src_next->q_prev = dst; |
| 220 | gcq_init(src); |
| 221 | } |
| 222 | } |
| 223 | |
| 224 | __attribute__((nonnull, always_inline)) static inline void |
| 225 | gcq_merge_head(struct gcq_head *dst, struct gcq_head *src) |
| 226 | { |
| 227 | gcq_merge(gcq_hq(dst), gcq_hq(src)); |
| 228 | } |
| 229 | |
| 230 | __attribute__((nonnull, always_inline)) static inline void |
| 231 | gcq_merge_tail(struct gcq_head *dst, struct gcq_head *src) |
| 232 | { |
| 233 | gcq_merge(gcq_hq(dst)->q_prev, gcq_hq(src)); |
| 234 | } |
| 235 | #endif |
| 236 | |
| 237 | __attribute__((nonnull)) static inline void |
| 238 | gcq_clear(struct gcq *q) |
| 239 | { |
| 240 | struct gcq *nq, *next; |
| 241 | nq=q; |
| 242 | do { |
| 243 | next = nq->q_next; |
| 244 | gcq_init(nq); |
| 245 | nq = next; |
| 246 | } while (next != q); |
| 247 | } |
| 248 | |
| 249 | __attribute__((nonnull, always_inline)) static inline void |
| 250 | gcq_remove_all(struct gcq_head *head) |
| 251 | { |
| 252 | gcq_clear(gcq_hq(head)); |
| 253 | } |
| 254 | |
| 255 | __attribute__((nonnull, always_inline)) static inline struct gcq * |
| 256 | _gcq_next(struct gcq *current, struct gcq_head *head, struct gcq *start) |
| 257 | { |
| 258 | struct gcq *q, *hq; |
| 259 | hq = gcq_hq(head); |
| 260 | q = current->q_next; |
| 261 | if (hq != start && q == hq) |
| 262 | q = hq->q_next; |
| 263 | if (current != start) |
| 264 | GCQ_ASSERT(gcq_onlist(current)); |
| 265 | return q; |
| 266 | } |
| 267 | |
| 268 | __attribute__((nonnull, always_inline)) static inline struct gcq * |
| 269 | _gcq_prev(struct gcq *current, struct gcq_head *head, struct gcq *start) |
| 270 | { |
| 271 | struct gcq *q, *hq; |
| 272 | hq = gcq_hq(head); |
| 273 | q = current->q_prev; |
| 274 | if (hq != start && q == hq) |
| 275 | q = hq->q_prev; |
| 276 | if (current != start) |
| 277 | GCQ_ASSERT(gcq_onlist(current)); |
| 278 | return q; |
| 279 | } |
| 280 | |
| 281 | |
| 282 | #define GCQ_ITEM(q, type, name) \ |
| 283 | ((type *)(void *)((uint8_t *)gcq_q(q) - offsetof(type, name))) |
| 284 | |
| 285 | |
| 286 | #define _GCQ_GDQ(var, h, ptr, fn) (gcq_hq(h)->ptr != gcq_hq(h) ? \ |
| 287 | (var = fn(gcq_hq(h)->ptr), true) : (var = NULL, false)) |
| 288 | #define _GCQ_GDQ_TYPED(tvar, h, type, name, ptr, fn) \ |
| 289 | (gcq_hq(h)->ptr != gcq_hq(h) ? (tvar = GCQ_ITEM(fn(gcq_hq(h)->ptr), \ |
| 290 | type, name), true) : (tvar = NULL, false)) |
| 291 | #define _GCQ_NP(var, current, head, start, np, fn) \ |
| 292 | (np(current, head, start) != (start) ? \ |
| 293 | (var = fn(np(current, head, start)), true) : (var = NULL, false)) |
| 294 | #define _GCQ_NP_TYPED(tvar, current, head, start, type, name, np, fn) \ |
| 295 | (np(current, head, start) != (start) ? \ |
| 296 | (tvar = GCQ_ITEM(fn(np(current, head, start)), type, name), true) : \ |
| 297 | (tvar = NULL, false)) |
| 298 | |
| 299 | #define _GCQ_GDQ_COND(var, h, ptr, rem, cond) \ |
| 300 | (gcq_hq(h)->ptr != gcq_hq(h) ? (var = gcq_hq(h)->ptr, \ |
| 301 | ((cond) ? (rem, true) : (var = NULL, false))) : \ |
| 302 | (var = NULL, false)) |
| 303 | #define _GCQ_GDQ_COND_TYPED(tvar, h, type, name, ptr, rem, cond) \ |
| 304 | (gcq_hq(h)->ptr != gcq_hq(h) ? (tvar = GCQ_ITEM(gcq_hq(h)->ptr, \ |
| 305 | type, name), ((cond) ? (rem, true) : (tvar = NULL, false))) : \ |
| 306 | (tvar = NULL, false)) |
| 307 | #define _GCQ_NP_COND(var, current, head, start, np, rem, cond) \ |
| 308 | (np(current, head, start) != (start) ? \ |
| 309 | (var = fn(np(current, head, start)), ((cond) ? (rem), true) : \ |
| 310 | (var = NULL, false))) : (var = NULL, false)) |
| 311 | #define _GCQ_NP_COND_TYPED(tvar, current, head, start, type, name, np, \ |
| 312 | rem, cond) (np(current, head, start) != (start) ? \ |
| 313 | (tvar = GCQ_ITEM(fn(np(current, head, start)), type, name), \ |
| 314 | ((cond) ? (rem, true) : (var = NULL, false))) : \ |
| 315 | (tvar = NULL, false)) |
| 316 | |
| 317 | #define GCQ_GOT_FIRST(var, h) _GCQ_GDQ(var, h, q_next, gcq_q) |
| 318 | #define GCQ_GOT_LAST(var, h) _GCQ_GDQ(var, h, q_prev, gcq_q) |
| 319 | #define GCQ_DEQUEUED_FIRST(var, h) _GCQ_GDQ(var, h, q_next, gcq_remove) |
| 320 | #define GCQ_DEQUEUED_LAST(var, h) _GCQ_GDQ(var, h, q_prev, gcq_remove) |
| 321 | #define GCQ_GOT_FIRST_TYPED(tvar, h, type, name) \ |
| 322 | _GCQ_GDQ_TYPED(tvar, h, type, name, q_next, gcq_q) |
| 323 | #define GCQ_GOT_LAST_TYPED(tvar, h, type, name) \ |
| 324 | _GCQ_GDQ_TYPED(tvar, h, type, name, q_prev, gcq_q) |
| 325 | #define GCQ_DEQUEUED_FIRST_TYPED(tvar, h, type, name) \ |
| 326 | _GCQ_GDQ_TYPED(tvar, h, type, name, q_next, gcq_remove) |
| 327 | #define GCQ_DEQUEUED_LAST_TYPED(tvar, h, type, name) \ |
| 328 | _GCQ_GDQ_TYPED(tvar, h, type, name, q_prev, gcq_remove) |
| 329 | #define GCQ_GOT_NEXT(var, current, head, start) \ |
| 330 | _GCQ_NP(var, current, head, start, _gcq_next, gcq_q) |
| 331 | #define GCQ_GOT_PREV(var, current, head, start) \ |
| 332 | _GCQ_NP(var, current, head, start, _gcq_prev, gcq_q) |
| 333 | #define GCQ_DEQUEUED_NEXT(var, current, head, start) \ |
| 334 | _GCQ_NP(var, current, head, start, _gcq_next, gcq_remove) |
| 335 | #define GCQ_DEQUEUED_PREV(var, current, head, start) \ |
| 336 | _GCQ_NP(var, current, head, start, _gcq_prev, gcq_remove) |
| 337 | #define GCQ_GOT_NEXT_TYPED(tvar, current, head, start, type, name) \ |
| 338 | _GCQ_NP_TYPED(tvar, current, head, start, type, name, \ |
| 339 | _gcq_next, gcq_q) |
| 340 | #define GCQ_GOT_PREV_TYPED(tvar, current, head, start, type, name) \ |
| 341 | _GCQ_NP_TYPED(tvar, current, head, start, type, name, \ |
| 342 | _gcq_prev, gcq_q) |
| 343 | #define GCQ_DEQUEUED_NEXT_TYPED(tvar, current, head, start, type, name) \ |
| 344 | _GCQ_NP_TYPED(tvar, current, head, start, type, name, \ |
| 345 | _gcq_next, gcq_remove) |
| 346 | #define GCQ_DEQUEUED_PREV_TYPED(tvar, current, head, start, type, name) \ |
| 347 | _GCQ_NP_TYPED(tvar, current, head, start, type, name, \ |
| 348 | _gcq_prev, gcq_remove) |
| 349 | |
| 350 | #define GCQ_GOT_FIRST_COND(var, h, cond) \ |
| 351 | _GCQ_GDQ_COND(var, h, q_next, ((void)0), cond) |
| 352 | #define GCQ_GOT_LAST_COND(var, h, cond) \ |
| 353 | _GCQ_GDQ_COND(var, h, q_prev, ((void)0), cond) |
| 354 | #define GCQ_DEQUEUED_FIRST_COND(var, h, cond) \ |
| 355 | _GCQ_GDQ_COND(var, h, q_next, gcq_remove(var), cond) |
| 356 | #define GCQ_DEQUEUED_LAST_COND(var, h, cond) \ |
| 357 | _GCQ_GDQ_COND(var, h, q_prev, gcq_remove(var), cond) |
| 358 | #define GCQ_GOT_FIRST_COND_TYPED(tvar, h, type, name, cond) \ |
| 359 | _GCQ_GDQ_COND_TYPED(tvar, h, type, name, q_next, ((void)0), cond) |
| 360 | #define GCQ_GOT_LAST_COND_TYPED(tvar, h, type, name, cond) \ |
| 361 | _GCQ_GDQ_COND_TYPED(tvar, h, type, name, q_prev, ((void)0), cond) |
| 362 | #define GCQ_DEQUEUED_FIRST_COND_TYPED(tvar, h, type, name, cond) \ |
| 363 | _GCQ_GDQ_COND_TYPED(tvar, h, type, name, q_next, \ |
| 364 | gcq_remove(&(tvar)->name), cond) |
| 365 | #define GCQ_DEQUEUED_LAST_COND_TYPED(tvar, h, type, name, cond) \ |
| 366 | _GCQ_GDQ_COND_TYPED(tvar, h, type, name, q_prev, \ |
| 367 | gcq_remove(&(tvar)->name), cond) |
| 368 | #define GCQ_GOT_NEXT_COND(var, current, head, start, cond) \ |
| 369 | _GCQ_NP_COND(var, current, head, start, _gcq_next, ((void)0), cond) |
| 370 | #define GCQ_GOT_PREV_COND(var, current, head, start, cond) \ |
| 371 | _GCQ_NP_COND(var, current, head, start, _gcq_prev, ((void)0), cond) |
| 372 | #define GCQ_DEQUEUED_NEXT_COND(var, current, head, start, cond) \ |
| 373 | _GCQ_NP_COND(var, current, head, start, _gcq_next, gcq_remove(var), \ |
| 374 | cond) |
| 375 | #define GCQ_DEQUEUED_PREV_COND(var, current, head, start, cond) \ |
| 376 | _GCQ_NP_COND(var, current, head, start, _gcq_prev, gcq_remove(var), \ |
| 377 | cond) |
| 378 | #define GCQ_GOT_NEXT_COND_TYPED(tvar, current, head, start, type, name, \ |
| 379 | cond) _GCQ_NP_COND_TYPED(tvar, current, head, start, type, name, \ |
| 380 | _gcq_next, ((void)0), cond) |
| 381 | #define GCQ_GOT_PREV_COND_TYPED(tvar, current, head, start, type, name, \ |
| 382 | cond) _GCQ_NP_COND_TYPED(tvar, current, head, start, type, name, \ |
| 383 | _gcq_prev, ((void)0), cond) |
| 384 | #define GCQ_DEQUEUED_NEXT_COND_TYPED(tvar, current, head, start, type, \ |
| 385 | name, cond) _GCQ_NP_COND_TYPED(tvar, current, head, start, type, \ |
| 386 | name, _gcq_next, gcq_remove(&(tvar)->name), cond) |
| 387 | #define GCQ_DEQUEUED_PREV_COND_TYPED(tvar, current, head, start, type, \ |
| 388 | name, cond) _GCQ_NP_COND_TYPED(tvar, current, head, start, type, \ |
| 389 | name, _gcq_prev, gcq_remove(&(tvar)->name), cond) |
| 390 | |
| 391 | |
| 392 | #define _GCQ_FOREACH(var, h, tnull, item, ptr) \ |
| 393 | for ((var)=gcq_hq(h)->ptr; ((var) != gcq_hq(h) && \ |
| 394 | (GCQ_ASSERT(gcq_onlist(var)), item, true)) || \ |
| 395 | (tnull, false); (var)=(var)->ptr) |
| 396 | #define _GCQ_FOREACH_NVAR(var, nvar, h, tnull, item, ptr, ol, rem, ro) \ |
| 397 | for ((nvar)=gcq_hq(h)->ptr; (((var)=(nvar), (nvar) != gcq_hq(h)) && \ |
| 398 | (ol, (nvar)=(nvar)->ptr, rem, item, true)) || (tnull, false); ro) |
| 399 | |
| 400 | #define GCQ_FOREACH(var, h) \ |
| 401 | _GCQ_FOREACH(var, h, ((void)0), ((void)0), q_next) |
| 402 | #define GCQ_FOREACH_REV(var, h) \ |
| 403 | _GCQ_FOREACH(var, h, ((void)0), ((void)0), q_prev) |
| 404 | #define GCQ_FOREACH_NVAR(var, nvar, h) \ |
| 405 | _GCQ_FOREACH_NVAR(var, nvar, h, ((void)0), ((void)0), \ |
| 406 | q_next, GCQ_ASSERT(gcq_onlist(nvar)), ((void)0), ((void)0)) |
| 407 | #define GCQ_FOREACH_NVAR_REV(var, nvar, h) \ |
| 408 | _GCQ_FOREACH_NVAR(var, nvar, h, ((void)0), ((void)0), \ |
| 409 | q_prev, GCQ_ASSERT(gcq_onlist(nvar)), ((void)0), ((void)0)) |
| 410 | #define GCQ_FOREACH_RO(var, nvar, h) \ |
| 411 | _GCQ_FOREACH_NVAR(var, nvar, h, ((void)0), ((void)0), \ |
| 412 | q_next, ((void)0), ((void)0), GCQ_ASSERT(gcq_linked(var, nvar))) |
| 413 | #define GCQ_FOREACH_RO_REV(var, nvar, h) \ |
| 414 | _GCQ_FOREACH_NVAR(var, nvar, h, ((void)0), ((void)0), \ |
| 415 | q_prev, ((void)0), ((void)0), GCQ_ASSERT(gcq_linked(nvar, var))) |
| 416 | #define GCQ_FOREACH_DEQUEUED(var, nvar, h) \ |
| 417 | _GCQ_FOREACH_NVAR(var, nvar, h, ((void)0), ((void)0), \ |
| 418 | q_next, GCQ_ASSERT(gcq_onlist(nvar)), gcq_remove(var), ((void)0) |
| 419 | #define GCQ_FOREACH_DEQUEUED_REV(var, nvar, h) \ |
| 420 | _GCQ_FOREACH_NVAR(var, nvar, h, ((void)0), ((void)0), \ |
| 421 | q_prev, GCQ_ASSERT(gcq_onlist(nvar)), gcq_remove(var), ((void)0) |
| 422 | |
| 423 | #define GCQ_FOREACH_TYPED(var, h, tvar, type, name) \ |
| 424 | _GCQ_FOREACH(var, h, (tvar)=NULL, (tvar)=GCQ_ITEM(var, type, name), \ |
| 425 | q_next) |
| 426 | #define GCQ_FOREACH_TYPED_REV(var, h, tvar, type, name) \ |
| 427 | _GCQ_FOREACH(var, h, (tvar)=NULL, (tvar)=GCQ_ITEM(var, type, name), \ |
| 428 | q_prev) |
| 429 | #define GCQ_FOREACH_NVAR_TYPED(var, nvar, h, tvar, type, name) \ |
| 430 | _GCQ_FOREACH_NVAR(var, nvar, h, (tvar)=NULL, \ |
| 431 | (tvar)=GCQ_ITEM(var, type, name), \ |
| 432 | q_next, GCQ_ASSERT(gcq_onlist(nvar)), ((void)0), ((void)0)) |
| 433 | #define GCQ_FOREACH_NVAR_REV_TYPED(var, nvar, h, tvar, type, name) \ |
| 434 | _GCQ_FOREACH_NVAR(var, nvar, h, (tvar)=NULL, \ |
| 435 | (tvar)=GCQ_ITEM(var, type, name), \ |
| 436 | q_prev, GCQ_ASSERT(gcq_onlist(nvar)), ((void)0), ((void)0)) |
| 437 | #define GCQ_FOREACH_RO_TYPED(var, nvar, h, tvar, type, name) \ |
| 438 | _GCQ_FOREACH_NVAR(var, nvar, h, (tvar)=NULL, \ |
| 439 | (tvar)=GCQ_ITEM(var, type, name), \ |
| 440 | q_next, ((void)0), ((void)0), GCQ_ASSERT(gcq_lined(var, nvar))) |
| 441 | #define GCQ_FOREACH_RO_REV_TYPED(var, nvar, h, tvar, type, name) \ |
| 442 | _GCQ_FOREACH_NVAR(var, nvar, h, (tvar)=NULL, \ |
| 443 | (tvar)=GCQ_ITEM(var, type, name), \ |
| 444 | q_prev, ((void)0), ((void)0), GCQ_ASSERT(gcq_linked(nvar, var))) |
| 445 | #define GCQ_FOREACH_DEQUEUED_TYPED(var, nvar, h, tvar, type, name) \ |
| 446 | _GCQ_FOREACH_NVAR(var, nvar, h, (tvar)=NULL, \ |
| 447 | (tvar)=GCQ_ITEM(var, type, name), \ |
| 448 | q_next, GCQ_ASSERT(gcq_onlist(nvar)), gcq_remove(var), ((void)0)) |
| 449 | #define GCQ_FOREACH_DEQUEUED_REV_TYPED(var, nvar, h, tvar, type, name) \ |
| 450 | _GCQ_FOREACH_NVAR(var, nvar, h, (tvar)=NULL, \ |
| 451 | (tvar)=GCQ_ITEM(var, type, name), \ |
| 452 | q_prev, GCQ_ASSERT(gcq_onlist(nvar)), gcq_remove(var), ((void)0)) |
| 453 | |
| 454 | #define _GCQ_COND(fe, cond) do { fe { if (cond) break; } } while (0) |
| 455 | |
| 456 | #define GCQ_FIND(var, h, cond) _GCQ_COND(GCQ_FOREACH(var, h), cond) |
| 457 | #define GCQ_FIND_REV(var, h, cond) _GCQ_COND(GCQ_FOREACH_REV(var, h), cond) |
| 458 | #define GCQ_FIND_TYPED(var, h, tvar, type, name, cond) \ |
| 459 | _GCQ_COND(GCQ_FOREACH_TYPED(var, h, tvar, type, name), cond) |
| 460 | #define GCQ_FIND_TYPED_REV(var, h, tvar, type, name, cond) \ |
| 461 | _GCQ_COND(GCQ_FOREACH_REV_TYPED(var, h, tvar, type, name), cond) |
| 462 | |
| 463 | #endif /* _GCQ_H */ |
| 464 | |