atomic.h revision 254617
1/*- 2 * Copyright (c) 1998 Doug Rabson 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: head/sys/i386/include/atomic.h 254617 2013-08-21 22:03:06Z jkim $ 27 */ 28#ifndef _MACHINE_ATOMIC_H_ 29#define _MACHINE_ATOMIC_H_ 30 31#ifndef _SYS_CDEFS_H_ 32#error this file needs sys/cdefs.h as a prerequisite 33#endif 34 35#define mb() __asm __volatile("lock; addl $0,(%%esp)" : : : "memory", "cc") 36#define wmb() __asm __volatile("lock; addl $0,(%%esp)" : : : "memory", "cc") 37#define rmb() __asm __volatile("lock; addl $0,(%%esp)" : : : "memory", "cc") 38 39/* 40 * Various simple operations on memory, each of which is atomic in the 41 * presence of interrupts and multiple processors. 42 * 43 * atomic_set_char(P, V) (*(u_char *)(P) |= (V)) 44 * atomic_clear_char(P, V) (*(u_char *)(P) &= ~(V)) 45 * atomic_add_char(P, V) (*(u_char *)(P) += (V)) 46 * atomic_subtract_char(P, V) (*(u_char *)(P) -= (V)) 47 * 48 * atomic_set_short(P, V) (*(u_short *)(P) |= (V)) 49 * atomic_clear_short(P, V) (*(u_short *)(P) &= ~(V)) 50 * atomic_add_short(P, V) (*(u_short *)(P) += (V)) 51 * atomic_subtract_short(P, V) (*(u_short *)(P) -= (V)) 52 * 53 * atomic_set_int(P, V) (*(u_int *)(P) |= (V)) 54 * atomic_clear_int(P, V) (*(u_int *)(P) &= ~(V)) 55 * atomic_add_int(P, V) (*(u_int *)(P) += (V)) 56 * atomic_subtract_int(P, V) (*(u_int *)(P) -= (V)) 57 * atomic_swap_int(P, V) (return (*(u_int *)(P)); *(u_int *)(P) = (V);) 58 * atomic_readandclear_int(P) (return (*(u_int *)(P)); *(u_int *)(P) = 0;) 59 * 60 * atomic_set_long(P, V) (*(u_long *)(P) |= (V)) 61 * atomic_clear_long(P, V) (*(u_long *)(P) &= ~(V)) 62 * atomic_add_long(P, V) (*(u_long *)(P) += (V)) 63 * atomic_subtract_long(P, V) (*(u_long *)(P) -= (V)) 64 * atomic_swap_long(P, V) (return (*(u_long *)(P)); *(u_long *)(P) = (V);) 65 * atomic_readandclear_long(P) (return (*(u_long *)(P)); *(u_long *)(P) = 0;) 66 */ 67 68/* 69 * The above functions are expanded inline in the statically-linked 70 * kernel. Lock prefixes are generated if an SMP kernel is being 71 * built. 72 * 73 * Kernel modules call real functions which are built into the kernel. 74 * This allows kernel modules to be portable between UP and SMP systems. 75 */ 76#if defined(KLD_MODULE) || !defined(__GNUCLIKE_ASM) 77#define ATOMIC_ASM(NAME, TYPE, OP, CONS, V) \ 78void atomic_##NAME##_##TYPE(volatile u_##TYPE *p, u_##TYPE v); \ 79void atomic_##NAME##_barr_##TYPE(volatile u_##TYPE *p, u_##TYPE v) 80 81int atomic_cmpset_int(volatile u_int *dst, u_int expect, u_int src); 82u_int atomic_fetchadd_int(volatile u_int *p, u_int v); 83int atomic_testandset_int(volatile u_int *p, u_int v); 84 85#define ATOMIC_LOAD(TYPE, LOP) \ 86u_##TYPE atomic_load_acq_##TYPE(volatile u_##TYPE *p) 87#define ATOMIC_STORE(TYPE) \ 88void atomic_store_rel_##TYPE(volatile u_##TYPE *p, u_##TYPE v) 89 90#else /* !KLD_MODULE && __GNUCLIKE_ASM */ 91 92/* 93 * For userland, always use lock prefixes so that the binaries will run 94 * on both SMP and !SMP systems. 95 */ 96#if defined(SMP) || !defined(_KERNEL) 97#define MPLOCKED "lock ; " 98#else 99#define MPLOCKED 100#endif 101 102/* 103 * The assembly is volatilized to avoid code chunk removal by the compiler. 104 * GCC aggressively reorders operations and memory clobbering is necessary 105 * in order to avoid that for memory barriers. 106 */ 107#define ATOMIC_ASM(NAME, TYPE, OP, CONS, V) \ 108static __inline void \ 109atomic_##NAME##_##TYPE(volatile u_##TYPE *p, u_##TYPE v)\ 110{ \ 111 __asm __volatile(MPLOCKED OP \ 112 : "+m" (*p) \ 113 : CONS (V) \ 114 : "cc"); \ 115} \ 116 \ 117static __inline void \ 118atomic_##NAME##_barr_##TYPE(volatile u_##TYPE *p, u_##TYPE v)\ 119{ \ 120 __asm __volatile(MPLOCKED OP \ 121 : "+m" (*p) \ 122 : CONS (V) \ 123 : "memory", "cc"); \ 124} \ 125struct __hack 126 127#if defined(_KERNEL) && !defined(WANT_FUNCTIONS) 128 129/* I486 does not support SMP or CMPXCHG8B. */ 130static __inline uint64_t 131atomic_load_acq_64_i386(volatile uint64_t *p) 132{ 133 volatile uint32_t *high, *low; 134 uint64_t res; 135 136 low = (volatile uint32_t *)p; 137 high = (volatile uint32_t *)p + 1; 138 __asm __volatile( 139 " pushfl ; " 140 " cli ; " 141 " movl %1,%%eax ; " 142 " movl %2,%%edx ; " 143 " popfl" 144 : "=&A" (res) /* 0 */ 145 : "m" (*low), /* 1 */ 146 "m" (*high) /* 2 */ 147 : "memory"); 148 149 return (res); 150} 151 152static __inline void 153atomic_store_rel_64_i386(volatile uint64_t *p, uint64_t v) 154{ 155 volatile uint32_t *high, *low; 156 157 low = (volatile uint32_t *)p; 158 high = (volatile uint32_t *)p + 1; 159 __asm __volatile( 160 " pushfl ; " 161 " cli ; " 162 " movl %%eax,%0 ; " 163 " movl %%edx,%1 ; " 164 " popfl" 165 : "=m" (*low), /* 0 */ 166 "=m" (*high) /* 1 */ 167 : "A" (v) /* 2 */ 168 : "memory"); 169} 170 171static __inline uint64_t 172atomic_load_acq_64_i586(volatile uint64_t *p) 173{ 174 uint64_t res; 175 176 __asm __volatile( 177 " movl %%ebx,%%eax ; " 178 " movl %%ecx,%%edx ; " 179 " " MPLOCKED " " 180 " cmpxchg8b %1" 181 : "=&A" (res), /* 0 */ 182 "+m" (*p) /* 1 */ 183 : : "memory", "cc"); 184 185 return (res); 186} 187 188static __inline void 189atomic_store_rel_64_i586(volatile uint64_t *p, uint64_t v) 190{ 191 192 __asm __volatile( 193 " movl %%eax,%%ebx ; " 194 " movl %%edx,%%ecx ; " 195 "1: " 196 " " MPLOCKED " " 197 " cmpxchg8b %0 ; " 198 " jne 1b" 199 : "+m" (*p), /* 0 */ 200 "+A" (v) /* 1 */ 201 : : "ebx", "ecx", "memory", "cc"); 202} 203 204#endif /* _KERNEL && !WANT_FUNCTIONS */ 205 206/* 207 * Atomic compare and set, used by the mutex functions 208 * 209 * if (*dst == expect) *dst = src (all 32 bit words) 210 * 211 * Returns 0 on failure, non-zero on success 212 */ 213 214#ifdef CPU_DISABLE_CMPXCHG 215 216static __inline int 217atomic_cmpset_int(volatile u_int *dst, u_int expect, u_int src) 218{ 219 u_char res; 220 221 __asm __volatile( 222 " pushfl ; " 223 " cli ; " 224 " cmpl %3,%1 ; " 225 " jne 1f ; " 226 " movl %2,%1 ; " 227 "1: " 228 " sete %0 ; " 229 " popfl ; " 230 "# atomic_cmpset_int" 231 : "=q" (res), /* 0 */ 232 "+m" (*dst) /* 1 */ 233 : "r" (src), /* 2 */ 234 "r" (expect) /* 3 */ 235 : "memory"); 236 237 return (res); 238} 239 240#else /* !CPU_DISABLE_CMPXCHG */ 241 242static __inline int 243atomic_cmpset_int(volatile u_int *dst, u_int expect, u_int src) 244{ 245 u_char res; 246 247 __asm __volatile( 248 " " MPLOCKED " " 249 " cmpxchgl %3,%1 ; " 250 " sete %0 ; " 251 "# atomic_cmpset_int" 252 : "=q" (res), /* 0 */ 253 "+m" (*dst), /* 1 */ 254 "+a" (expect) /* 2 */ 255 : "r" (src) /* 3 */ 256 : "memory", "cc"); 257 258 return (res); 259} 260 261#endif /* CPU_DISABLE_CMPXCHG */ 262 263/* 264 * Atomically add the value of v to the integer pointed to by p and return 265 * the previous value of *p. 266 */ 267static __inline u_int 268atomic_fetchadd_int(volatile u_int *p, u_int v) 269{ 270 271 __asm __volatile( 272 " " MPLOCKED " " 273 " xaddl %0,%1 ; " 274 "# atomic_fetchadd_int" 275 : "+r" (v), /* 0 */ 276 "+m" (*p) /* 1 */ 277 : : "cc"); 278 return (v); 279} 280 281static __inline int 282atomic_testandset_int(volatile u_int *p, u_int v) 283{ 284 u_char res; 285 286 __asm __volatile( 287 " " MPLOCKED " " 288 " btsl %2,%1 ; " 289 " setc %0 ; " 290 "# atomic_testandset_int" 291 : "=q" (res), /* 0 */ 292 "+m" (*p) /* 1 */ 293 : "Ir" (v & 0x1f) /* 2 */ 294 : "cc"); 295 return (res); 296} 297 298/* 299 * We assume that a = b will do atomic loads and stores. Due to the 300 * IA32 memory model, a simple store guarantees release semantics. 301 * 302 * However, loads may pass stores, so for atomic_load_acq we have to 303 * ensure a Store/Load barrier to do the load in SMP kernels. We use 304 * "lock cmpxchg" as recommended by the AMD Software Optimization 305 * Guide, and not mfence. For UP kernels, however, the cache of the 306 * single processor is always consistent, so we only need to take care 307 * of the compiler. 308 */ 309#define ATOMIC_STORE(TYPE) \ 310static __inline void \ 311atomic_store_rel_##TYPE(volatile u_##TYPE *p, u_##TYPE v)\ 312{ \ 313 __compiler_membar(); \ 314 *p = v; \ 315} \ 316struct __hack 317 318#if defined(_KERNEL) && !defined(SMP) 319 320#define ATOMIC_LOAD(TYPE, LOP) \ 321static __inline u_##TYPE \ 322atomic_load_acq_##TYPE(volatile u_##TYPE *p) \ 323{ \ 324 u_##TYPE tmp; \ 325 \ 326 tmp = *p; \ 327 __compiler_membar(); \ 328 return (tmp); \ 329} \ 330struct __hack 331 332#else /* !(_KERNEL && !SMP) */ 333 334#define ATOMIC_LOAD(TYPE, LOP) \ 335static __inline u_##TYPE \ 336atomic_load_acq_##TYPE(volatile u_##TYPE *p) \ 337{ \ 338 u_##TYPE res; \ 339 \ 340 __asm __volatile(MPLOCKED LOP \ 341 : "=a" (res), /* 0 */ \ 342 "+m" (*p) /* 1 */ \ 343 : : "memory", "cc"); \ 344 \ 345 return (res); \ 346} \ 347struct __hack 348 349#endif /* _KERNEL && !SMP */ 350 351#endif /* KLD_MODULE || !__GNUCLIKE_ASM */ 352 353ATOMIC_ASM(set, char, "orb %b1,%0", "iq", v); 354ATOMIC_ASM(clear, char, "andb %b1,%0", "iq", ~v); 355ATOMIC_ASM(add, char, "addb %b1,%0", "iq", v); 356ATOMIC_ASM(subtract, char, "subb %b1,%0", "iq", v); 357 358ATOMIC_ASM(set, short, "orw %w1,%0", "ir", v); 359ATOMIC_ASM(clear, short, "andw %w1,%0", "ir", ~v); 360ATOMIC_ASM(add, short, "addw %w1,%0", "ir", v); 361ATOMIC_ASM(subtract, short, "subw %w1,%0", "ir", v); 362 363ATOMIC_ASM(set, int, "orl %1,%0", "ir", v); 364ATOMIC_ASM(clear, int, "andl %1,%0", "ir", ~v); 365ATOMIC_ASM(add, int, "addl %1,%0", "ir", v); 366ATOMIC_ASM(subtract, int, "subl %1,%0", "ir", v); 367 368ATOMIC_ASM(set, long, "orl %1,%0", "ir", v); 369ATOMIC_ASM(clear, long, "andl %1,%0", "ir", ~v); 370ATOMIC_ASM(add, long, "addl %1,%0", "ir", v); 371ATOMIC_ASM(subtract, long, "subl %1,%0", "ir", v); 372 373ATOMIC_LOAD(char, "cmpxchgb %b0,%1"); 374ATOMIC_LOAD(short, "cmpxchgw %w0,%1"); 375ATOMIC_LOAD(int, "cmpxchgl %0,%1"); 376ATOMIC_LOAD(long, "cmpxchgl %0,%1"); 377 378ATOMIC_STORE(char); 379ATOMIC_STORE(short); 380ATOMIC_STORE(int); 381ATOMIC_STORE(long); 382 383#undef ATOMIC_ASM 384#undef ATOMIC_LOAD 385#undef ATOMIC_STORE 386 387#ifndef WANT_FUNCTIONS 388 389#ifdef _KERNEL 390extern uint64_t (*atomic_load_acq_64)(volatile uint64_t *); 391extern void (*atomic_store_rel_64)(volatile uint64_t *, uint64_t); 392#endif 393 394static __inline int 395atomic_cmpset_long(volatile u_long *dst, u_long expect, u_long src) 396{ 397 398 return (atomic_cmpset_int((volatile u_int *)dst, (u_int)expect, 399 (u_int)src)); 400} 401 402static __inline u_long 403atomic_fetchadd_long(volatile u_long *p, u_long v) 404{ 405 406 return (atomic_fetchadd_int((volatile u_int *)p, (u_int)v)); 407} 408 409static __inline int 410atomic_testandset_long(volatile u_long *p, u_int v) 411{ 412 413 return (atomic_testandset_int((volatile u_int *)p, v)); 414} 415 416/* Read the current value and store a new value in the destination. */ 417#ifdef __GNUCLIKE_ASM 418 419static __inline u_int 420atomic_swap_int(volatile u_int *p, u_int v) 421{ 422 423 __asm __volatile( 424 " xchgl %1,%0 ; " 425 "# atomic_swap_int" 426 : "+r" (v), /* 0 */ 427 "+m" (*p)); /* 1 */ 428 429 return (v); 430} 431 432static __inline u_long 433atomic_swap_long(volatile u_long *p, u_long v) 434{ 435 436 return (atomic_swap_int((volatile u_int *)p, (u_int)v)); 437} 438 439#else /* !__GNUCLIKE_ASM */ 440 441u_int atomic_swap_int(volatile u_int *p, u_int v); 442u_long atomic_swap_long(volatile u_long *p, u_long v); 443 444#endif /* __GNUCLIKE_ASM */ 445 446#define atomic_set_acq_char atomic_set_barr_char 447#define atomic_set_rel_char atomic_set_barr_char 448#define atomic_clear_acq_char atomic_clear_barr_char 449#define atomic_clear_rel_char atomic_clear_barr_char 450#define atomic_add_acq_char atomic_add_barr_char 451#define atomic_add_rel_char atomic_add_barr_char 452#define atomic_subtract_acq_char atomic_subtract_barr_char 453#define atomic_subtract_rel_char atomic_subtract_barr_char 454 455#define atomic_set_acq_short atomic_set_barr_short 456#define atomic_set_rel_short atomic_set_barr_short 457#define atomic_clear_acq_short atomic_clear_barr_short 458#define atomic_clear_rel_short atomic_clear_barr_short 459#define atomic_add_acq_short atomic_add_barr_short 460#define atomic_add_rel_short atomic_add_barr_short 461#define atomic_subtract_acq_short atomic_subtract_barr_short 462#define atomic_subtract_rel_short atomic_subtract_barr_short 463 464#define atomic_set_acq_int atomic_set_barr_int 465#define atomic_set_rel_int atomic_set_barr_int 466#define atomic_clear_acq_int atomic_clear_barr_int 467#define atomic_clear_rel_int atomic_clear_barr_int 468#define atomic_add_acq_int atomic_add_barr_int 469#define atomic_add_rel_int atomic_add_barr_int 470#define atomic_subtract_acq_int atomic_subtract_barr_int 471#define atomic_subtract_rel_int atomic_subtract_barr_int 472#define atomic_cmpset_acq_int atomic_cmpset_int 473#define atomic_cmpset_rel_int atomic_cmpset_int 474 475#define atomic_set_acq_long atomic_set_barr_long 476#define atomic_set_rel_long atomic_set_barr_long 477#define atomic_clear_acq_long atomic_clear_barr_long 478#define atomic_clear_rel_long atomic_clear_barr_long 479#define atomic_add_acq_long atomic_add_barr_long 480#define atomic_add_rel_long atomic_add_barr_long 481#define atomic_subtract_acq_long atomic_subtract_barr_long 482#define atomic_subtract_rel_long atomic_subtract_barr_long 483#define atomic_cmpset_acq_long atomic_cmpset_long 484#define atomic_cmpset_rel_long atomic_cmpset_long 485 486#define atomic_readandclear_int(p) atomic_swap_int(p, 0) 487#define atomic_readandclear_long(p) atomic_swap_long(p, 0) 488 489/* Operations on 8-bit bytes. */ 490#define atomic_set_8 atomic_set_char 491#define atomic_set_acq_8 atomic_set_acq_char 492#define atomic_set_rel_8 atomic_set_rel_char 493#define atomic_clear_8 atomic_clear_char 494#define atomic_clear_acq_8 atomic_clear_acq_char 495#define atomic_clear_rel_8 atomic_clear_rel_char 496#define atomic_add_8 atomic_add_char 497#define atomic_add_acq_8 atomic_add_acq_char 498#define atomic_add_rel_8 atomic_add_rel_char 499#define atomic_subtract_8 atomic_subtract_char 500#define atomic_subtract_acq_8 atomic_subtract_acq_char 501#define atomic_subtract_rel_8 atomic_subtract_rel_char 502#define atomic_load_acq_8 atomic_load_acq_char 503#define atomic_store_rel_8 atomic_store_rel_char 504 505/* Operations on 16-bit words. */ 506#define atomic_set_16 atomic_set_short 507#define atomic_set_acq_16 atomic_set_acq_short 508#define atomic_set_rel_16 atomic_set_rel_short 509#define atomic_clear_16 atomic_clear_short 510#define atomic_clear_acq_16 atomic_clear_acq_short 511#define atomic_clear_rel_16 atomic_clear_rel_short 512#define atomic_add_16 atomic_add_short 513#define atomic_add_acq_16 atomic_add_acq_short 514#define atomic_add_rel_16 atomic_add_rel_short 515#define atomic_subtract_16 atomic_subtract_short 516#define atomic_subtract_acq_16 atomic_subtract_acq_short 517#define atomic_subtract_rel_16 atomic_subtract_rel_short 518#define atomic_load_acq_16 atomic_load_acq_short 519#define atomic_store_rel_16 atomic_store_rel_short 520 521/* Operations on 32-bit double words. */ 522#define atomic_set_32 atomic_set_int 523#define atomic_set_acq_32 atomic_set_acq_int 524#define atomic_set_rel_32 atomic_set_rel_int 525#define atomic_clear_32 atomic_clear_int 526#define atomic_clear_acq_32 atomic_clear_acq_int 527#define atomic_clear_rel_32 atomic_clear_rel_int 528#define atomic_add_32 atomic_add_int 529#define atomic_add_acq_32 atomic_add_acq_int 530#define atomic_add_rel_32 atomic_add_rel_int 531#define atomic_subtract_32 atomic_subtract_int 532#define atomic_subtract_acq_32 atomic_subtract_acq_int 533#define atomic_subtract_rel_32 atomic_subtract_rel_int 534#define atomic_load_acq_32 atomic_load_acq_int 535#define atomic_store_rel_32 atomic_store_rel_int 536#define atomic_cmpset_32 atomic_cmpset_int 537#define atomic_cmpset_acq_32 atomic_cmpset_acq_int 538#define atomic_cmpset_rel_32 atomic_cmpset_rel_int 539#define atomic_swap_32 atomic_swap_int 540#define atomic_readandclear_32 atomic_readandclear_int 541#define atomic_fetchadd_32 atomic_fetchadd_int 542#define atomic_testandset_32 atomic_testandset_int 543 544/* Operations on pointers. */ 545#define atomic_set_ptr(p, v) \ 546 atomic_set_int((volatile u_int *)(p), (u_int)(v)) 547#define atomic_set_acq_ptr(p, v) \ 548 atomic_set_acq_int((volatile u_int *)(p), (u_int)(v)) 549#define atomic_set_rel_ptr(p, v) \ 550 atomic_set_rel_int((volatile u_int *)(p), (u_int)(v)) 551#define atomic_clear_ptr(p, v) \ 552 atomic_clear_int((volatile u_int *)(p), (u_int)(v)) 553#define atomic_clear_acq_ptr(p, v) \ 554 atomic_clear_acq_int((volatile u_int *)(p), (u_int)(v)) 555#define atomic_clear_rel_ptr(p, v) \ 556 atomic_clear_rel_int((volatile u_int *)(p), (u_int)(v)) 557#define atomic_add_ptr(p, v) \ 558 atomic_add_int((volatile u_int *)(p), (u_int)(v)) 559#define atomic_add_acq_ptr(p, v) \ 560 atomic_add_acq_int((volatile u_int *)(p), (u_int)(v)) 561#define atomic_add_rel_ptr(p, v) \ 562 atomic_add_rel_int((volatile u_int *)(p), (u_int)(v)) 563#define atomic_subtract_ptr(p, v) \ 564 atomic_subtract_int((volatile u_int *)(p), (u_int)(v)) 565#define atomic_subtract_acq_ptr(p, v) \ 566 atomic_subtract_acq_int((volatile u_int *)(p), (u_int)(v)) 567#define atomic_subtract_rel_ptr(p, v) \ 568 atomic_subtract_rel_int((volatile u_int *)(p), (u_int)(v)) 569#define atomic_load_acq_ptr(p) \ 570 atomic_load_acq_int((volatile u_int *)(p)) 571#define atomic_store_rel_ptr(p, v) \ 572 atomic_store_rel_int((volatile u_int *)(p), (v)) 573#define atomic_cmpset_ptr(dst, old, new) \ 574 atomic_cmpset_int((volatile u_int *)(dst), (u_int)(old), (u_int)(new)) 575#define atomic_cmpset_acq_ptr(dst, old, new) \ 576 atomic_cmpset_acq_int((volatile u_int *)(dst), (u_int)(old), \ 577 (u_int)(new)) 578#define atomic_cmpset_rel_ptr(dst, old, new) \ 579 atomic_cmpset_rel_int((volatile u_int *)(dst), (u_int)(old), \ 580 (u_int)(new)) 581#define atomic_swap_ptr(p, v) \ 582 atomic_swap_int((volatile u_int *)(p), (u_int)(v)) 583#define atomic_readandclear_ptr(p) \ 584 atomic_readandclear_int((volatile u_int *)(p)) 585 586#endif /* !WANT_FUNCTIONS */ 587 588#endif /* !_MACHINE_ATOMIC_H_ */ 589