LLVM OpenMP* Runtime Library
kmp_os.h
1 /*
2  * kmp_os.h -- KPTS runtime header file.
3  */
4 
5 //===----------------------------------------------------------------------===//
6 //
7 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
8 // See https://llvm.org/LICENSE.txt for license information.
9 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #ifndef KMP_OS_H
14 #define KMP_OS_H
15 
16 #include "kmp_config.h"
17 #include <atomic>
18 #include <stdarg.h>
19 #include <stdlib.h>
20 #include <string.h>
21 
22 #define KMP_FTN_PLAIN 1
23 #define KMP_FTN_APPEND 2
24 #define KMP_FTN_UPPER 3
25 /*
26 #define KMP_FTN_PREPEND 4
27 #define KMP_FTN_UAPPEND 5
28 */
29 
30 #define KMP_PTR_SKIP (sizeof(void *))
31 
32 /* -------------------------- Compiler variations ------------------------ */
33 
34 #define KMP_OFF 0
35 #define KMP_ON 1
36 
37 #define KMP_MEM_CONS_VOLATILE 0
38 #define KMP_MEM_CONS_FENCE 1
39 
40 #ifndef KMP_MEM_CONS_MODEL
41 #define KMP_MEM_CONS_MODEL KMP_MEM_CONS_VOLATILE
42 #endif
43 
44 #ifndef __has_cpp_attribute
45 #define __has_cpp_attribute(x) 0
46 #endif
47 
48 #ifndef __has_attribute
49 #define __has_attribute(x) 0
50 #endif
51 
52 /* ------------------------- Compiler recognition ---------------------- */
53 #define KMP_COMPILER_ICC 0
54 #define KMP_COMPILER_GCC 0
55 #define KMP_COMPILER_CLANG 0
56 #define KMP_COMPILER_MSVC 0
57 #define KMP_COMPILER_ICX 0
58 
59 #if __INTEL_CLANG_COMPILER
60 #undef KMP_COMPILER_ICX
61 #define KMP_COMPILER_ICX 1
62 #elif defined(__INTEL_COMPILER)
63 #undef KMP_COMPILER_ICC
64 #define KMP_COMPILER_ICC 1
65 #elif defined(__clang__)
66 #undef KMP_COMPILER_CLANG
67 #define KMP_COMPILER_CLANG 1
68 #elif defined(__GNUC__)
69 #undef KMP_COMPILER_GCC
70 #define KMP_COMPILER_GCC 1
71 #elif defined(_MSC_VER)
72 #undef KMP_COMPILER_MSVC
73 #define KMP_COMPILER_MSVC 1
74 #else
75 #error Unknown compiler
76 #endif
77 
78 #if (KMP_OS_LINUX || KMP_OS_WINDOWS || KMP_OS_FREEBSD || KMP_OS_NETBSD || \
79  KMP_OS_DRAGONFLY || KMP_OS_AIX) && \
80  !KMP_OS_WASI && !KMP_OS_EMSCRIPTEN
81 #define KMP_AFFINITY_SUPPORTED 1
82 #if KMP_OS_WINDOWS && KMP_ARCH_X86_64
83 #define KMP_GROUP_AFFINITY 1
84 #else
85 #define KMP_GROUP_AFFINITY 0
86 #endif
87 #else
88 #define KMP_AFFINITY_SUPPORTED 0
89 #define KMP_GROUP_AFFINITY 0
90 #endif
91 
92 #if (KMP_OS_LINUX || (KMP_OS_FREEBSD && __FreeBSD_version >= 1301000))
93 #define KMP_HAVE_SCHED_GETCPU 1
94 #else
95 #define KMP_HAVE_SCHED_GETCPU 0
96 #endif
97 
98 /* Check for quad-precision extension. */
99 #define KMP_HAVE_QUAD 0
100 #if KMP_ARCH_X86 || KMP_ARCH_X86_64
101 #if KMP_COMPILER_ICC || KMP_COMPILER_ICX
102 /* _Quad is already defined for icc */
103 #undef KMP_HAVE_QUAD
104 #define KMP_HAVE_QUAD 1
105 #elif KMP_COMPILER_CLANG
106 /* Clang doesn't support a software-implemented
107  128-bit extended precision type yet */
108 typedef long double _Quad;
109 #elif KMP_COMPILER_GCC
110 /* GCC on NetBSD lacks __multc3/__divtc3 builtins needed for quad until
111  NetBSD 10.0 which ships with GCC 10.5 */
112 #if (!KMP_OS_NETBSD || __GNUC__ >= 10)
113 typedef __float128 _Quad;
114 #undef KMP_HAVE_QUAD
115 #define KMP_HAVE_QUAD 1
116 #endif
117 #elif KMP_COMPILER_MSVC
118 typedef long double _Quad;
119 #endif
120 #else
121 #if __LDBL_MAX_EXP__ >= 16384 && KMP_COMPILER_GCC
122 typedef long double _Quad;
123 #undef KMP_HAVE_QUAD
124 #define KMP_HAVE_QUAD 1
125 #endif
126 #endif /* KMP_ARCH_X86 || KMP_ARCH_X86_64 */
127 
128 #define KMP_USE_X87CONTROL 0
129 #if KMP_OS_WINDOWS
130 #define KMP_END_OF_LINE "\r\n"
131 typedef char kmp_int8;
132 typedef unsigned char kmp_uint8;
133 typedef short kmp_int16;
134 typedef unsigned short kmp_uint16;
135 typedef int kmp_int32;
136 typedef unsigned int kmp_uint32;
137 #define KMP_INT32_SPEC "d"
138 #define KMP_UINT32_SPEC "u"
139 #ifndef KMP_STRUCT64
140 typedef __int64 kmp_int64;
141 typedef unsigned __int64 kmp_uint64;
142 #define KMP_INT64_SPEC "I64d"
143 #define KMP_UINT64_SPEC "I64u"
144 #else
145 struct kmp_struct64 {
146  kmp_int32 a, b;
147 };
148 typedef struct kmp_struct64 kmp_int64;
149 typedef struct kmp_struct64 kmp_uint64;
150 /* Not sure what to use for KMP_[U]INT64_SPEC here */
151 #endif
152 #if KMP_ARCH_X86 && KMP_MSVC_COMPAT
153 #undef KMP_USE_X87CONTROL
154 #define KMP_USE_X87CONTROL 1
155 #endif
156 #if KMP_ARCH_X86_64 || KMP_ARCH_AARCH64
157 #define KMP_INTPTR 1
158 typedef __int64 kmp_intptr_t;
159 typedef unsigned __int64 kmp_uintptr_t;
160 #define KMP_INTPTR_SPEC "I64d"
161 #define KMP_UINTPTR_SPEC "I64u"
162 #endif
163 #endif /* KMP_OS_WINDOWS */
164 
165 #if KMP_OS_UNIX
166 #define KMP_END_OF_LINE "\n"
167 typedef char kmp_int8;
168 typedef unsigned char kmp_uint8;
169 typedef short kmp_int16;
170 typedef unsigned short kmp_uint16;
171 typedef int kmp_int32;
172 typedef unsigned int kmp_uint32;
173 typedef long long kmp_int64;
174 typedef unsigned long long kmp_uint64;
175 #define KMP_INT32_SPEC "d"
176 #define KMP_UINT32_SPEC "u"
177 #define KMP_INT64_SPEC "lld"
178 #define KMP_UINT64_SPEC "llu"
179 #endif /* KMP_OS_UNIX */
180 
181 #if KMP_ARCH_X86 || KMP_ARCH_ARM || KMP_ARCH_MIPS || KMP_ARCH_WASM || \
182  KMP_ARCH_PPC || KMP_ARCH_AARCH64_32 || KMP_ARCH_SPARC32
183 #define KMP_SIZE_T_SPEC KMP_UINT32_SPEC
184 #elif KMP_ARCH_X86_64 || KMP_ARCH_PPC64 || KMP_ARCH_AARCH64 || \
185  KMP_ARCH_MIPS64 || KMP_ARCH_RISCV64 || KMP_ARCH_LOONGARCH64 || \
186  KMP_ARCH_VE || KMP_ARCH_S390X || KMP_ARCH_SPARC64
187 #define KMP_SIZE_T_SPEC KMP_UINT64_SPEC
188 #else
189 #error "Can't determine size_t printf format specifier."
190 #endif
191 
192 #if KMP_ARCH_X86 || KMP_ARCH_ARM || KMP_ARCH_WASM || KMP_ARCH_PPC
193 #define KMP_SIZE_T_MAX (0xFFFFFFFF)
194 #else
195 #define KMP_SIZE_T_MAX (0xFFFFFFFFFFFFFFFF)
196 #endif
197 
198 typedef size_t kmp_size_t;
199 typedef float kmp_real32;
200 typedef double kmp_real64;
201 
202 #ifndef KMP_INTPTR
203 #define KMP_INTPTR 1
204 typedef long kmp_intptr_t;
205 typedef unsigned long kmp_uintptr_t;
206 #define KMP_INTPTR_SPEC "ld"
207 #define KMP_UINTPTR_SPEC "lu"
208 #endif
209 
210 #ifdef BUILD_I8
211 typedef kmp_int64 kmp_int;
212 typedef kmp_uint64 kmp_uint;
213 #else
214 typedef kmp_int32 kmp_int;
215 typedef kmp_uint32 kmp_uint;
216 #endif /* BUILD_I8 */
217 #define KMP_INT_MAX ((kmp_int32)0x7FFFFFFF)
218 #define KMP_INT_MIN ((kmp_int32)0x80000000)
219 
220 // stdarg handling
221 #if (KMP_ARCH_ARM || KMP_ARCH_X86_64 || KMP_ARCH_AARCH64 || KMP_ARCH_WASM) && \
222  (KMP_OS_FREEBSD || KMP_OS_NETBSD || KMP_OS_OPENBSD || KMP_OS_DRAGONFLY || \
223  KMP_OS_LINUX || KMP_OS_WASI)
224 typedef va_list *kmp_va_list;
225 #define kmp_va_deref(ap) (*(ap))
226 #define kmp_va_addr_of(ap) (&(ap))
227 #else
228 typedef va_list kmp_va_list;
229 #define kmp_va_deref(ap) (ap)
230 #define kmp_va_addr_of(ap) (ap)
231 #endif
232 
233 #ifdef __cplusplus
234 // macros to cast out qualifiers and to re-interpret types
235 #define CCAST(type, var) const_cast<type>(var)
236 #define RCAST(type, var) reinterpret_cast<type>(var)
237 //-------------------------------------------------------------------------
238 // template for debug prints specification ( d, u, lld, llu ), and to obtain
239 // signed/unsigned flavors of a type
240 template <typename T> struct traits_t {};
241 // int
242 template <> struct traits_t<signed int> {
243  typedef signed int signed_t;
244  typedef unsigned int unsigned_t;
245  typedef double floating_t;
246  static char const *spec;
247  static const signed_t max_value = 0x7fffffff;
248  static const signed_t min_value = 0x80000000;
249  static const int type_size = sizeof(signed_t);
250 };
251 // unsigned int
252 template <> struct traits_t<unsigned int> {
253  typedef signed int signed_t;
254  typedef unsigned int unsigned_t;
255  typedef double floating_t;
256  static char const *spec;
257  static const unsigned_t max_value = 0xffffffff;
258  static const unsigned_t min_value = 0x00000000;
259  static const int type_size = sizeof(unsigned_t);
260 };
261 // long
262 template <> struct traits_t<signed long> {
263  typedef signed long signed_t;
264  typedef unsigned long unsigned_t;
265  typedef long double floating_t;
266  static char const *spec;
267  static const int type_size = sizeof(signed_t);
268 };
269 // long long
270 template <> struct traits_t<signed long long> {
271  typedef signed long long signed_t;
272  typedef unsigned long long unsigned_t;
273  typedef long double floating_t;
274  static char const *spec;
275  static const signed_t max_value = 0x7fffffffffffffffLL;
276  static const signed_t min_value = 0x8000000000000000LL;
277  static const int type_size = sizeof(signed_t);
278 };
279 // unsigned long long
280 template <> struct traits_t<unsigned long long> {
281  typedef signed long long signed_t;
282  typedef unsigned long long unsigned_t;
283  typedef long double floating_t;
284  static char const *spec;
285  static const unsigned_t max_value = 0xffffffffffffffffLL;
286  static const unsigned_t min_value = 0x0000000000000000LL;
287  static const int type_size = sizeof(unsigned_t);
288 };
289 //-------------------------------------------------------------------------
290 #else
291 #define CCAST(type, var) (type)(var)
292 #define RCAST(type, var) (type)(var)
293 #endif // __cplusplus
294 
295 #define KMP_EXPORT extern /* export declaration in guide libraries */
296 
297 #if __GNUC__ >= 4 && !defined(__MINGW32__)
298 #define __forceinline __inline
299 #endif
300 
301 /* Check if the OS/arch can support user-level mwait */
302 // All mwait code tests for UMWAIT first, so it should only fall back to ring3
303 // MWAIT for KNL.
304 #define KMP_HAVE_MWAIT \
305  ((KMP_ARCH_X86 || KMP_ARCH_X86_64) && (KMP_OS_LINUX || KMP_OS_WINDOWS) && \
306  !KMP_MIC2)
307 #define KMP_HAVE_UMWAIT \
308  ((KMP_ARCH_X86 || KMP_ARCH_X86_64) && (KMP_OS_LINUX || KMP_OS_WINDOWS) && \
309  !KMP_MIC)
310 
311 #if KMP_OS_WINDOWS
312 // Don't include everything related to NT status code, we'll do that explicitly
313 #define WIN32_NO_STATUS
314 #include <windows.h>
315 
316 static inline int KMP_GET_PAGE_SIZE(void) {
317  SYSTEM_INFO si;
318  GetSystemInfo(&si);
319  return si.dwPageSize;
320 }
321 #else
322 #define KMP_GET_PAGE_SIZE() getpagesize()
323 #endif
324 
325 #define PAGE_ALIGNED(_addr) \
326  (!((size_t)_addr & (size_t)(KMP_GET_PAGE_SIZE() - 1)))
327 #define ALIGN_TO_PAGE(x) \
328  (void *)(((size_t)(x)) & ~((size_t)(KMP_GET_PAGE_SIZE() - 1)))
329 
330 /* ---------- Support for cache alignment, padding, etc. ----------------*/
331 
332 #ifdef __cplusplus
333 extern "C" {
334 #endif // __cplusplus
335 
336 #define INTERNODE_CACHE_LINE 4096 /* for multi-node systems */
337 
338 /* Define the default size of the cache line */
339 #ifndef CACHE_LINE
340 #define CACHE_LINE 128 /* cache line size in bytes */
341 #else
342 #if (CACHE_LINE < 64) && !defined(KMP_OS_DARWIN)
343 // 2006-02-13: This produces too many warnings on OS X*. Disable for now
344 #warning CACHE_LINE is too small.
345 #endif
346 #endif /* CACHE_LINE */
347 
348 #define KMP_CACHE_PREFETCH(ADDR) /* nothing */
349 
350 // Define attribute that indicates that the fall through from the previous
351 // case label is intentional and should not be diagnosed by a compiler
352 // Code from libcxx/include/__config
353 // Use a function like macro to imply that it must be followed by a semicolon
354 #if __cplusplus > 201402L && __has_cpp_attribute(fallthrough)
355 #define KMP_FALLTHROUGH() [[fallthrough]]
356 // icc cannot properly tell this attribute is absent so force off
357 #elif KMP_COMPILER_ICC
358 #define KMP_FALLTHROUGH() ((void)0)
359 #elif __has_cpp_attribute(clang::fallthrough)
360 #define KMP_FALLTHROUGH() [[clang::fallthrough]]
361 #elif __has_attribute(fallthrough) || __GNUC__ >= 7
362 #define KMP_FALLTHROUGH() __attribute__((__fallthrough__))
363 #else
364 #define KMP_FALLTHROUGH() ((void)0)
365 #endif
366 
367 #if KMP_HAVE_ATTRIBUTE_WAITPKG
368 #define KMP_ATTRIBUTE_TARGET_WAITPKG __attribute__((target("waitpkg")))
369 #else
370 #define KMP_ATTRIBUTE_TARGET_WAITPKG /* Nothing */
371 #endif
372 
373 #if KMP_HAVE_ATTRIBUTE_RTM
374 #define KMP_ATTRIBUTE_TARGET_RTM __attribute__((target("rtm")))
375 #else
376 #define KMP_ATTRIBUTE_TARGET_RTM /* Nothing */
377 #endif
378 
379 // Define attribute that indicates a function does not return
380 #if __cplusplus >= 201103L
381 #define KMP_NORETURN [[noreturn]]
382 #elif KMP_OS_WINDOWS
383 #define KMP_NORETURN __declspec(noreturn)
384 #else
385 #define KMP_NORETURN __attribute__((noreturn))
386 #endif
387 
388 #if KMP_OS_WINDOWS && KMP_MSVC_COMPAT
389 #define KMP_ALIGN(bytes) __declspec(align(bytes))
390 #define KMP_THREAD_LOCAL __declspec(thread)
391 #define KMP_ALIAS /* Nothing */
392 #else
393 #define KMP_ALIGN(bytes) __attribute__((aligned(bytes)))
394 #define KMP_THREAD_LOCAL __thread
395 #define KMP_ALIAS(alias_of) __attribute__((alias(alias_of)))
396 #endif
397 
398 #if KMP_HAVE_WEAK_ATTRIBUTE && !KMP_DYNAMIC_LIB
399 #define KMP_WEAK_ATTRIBUTE_EXTERNAL __attribute__((weak))
400 #else
401 #define KMP_WEAK_ATTRIBUTE_EXTERNAL /* Nothing */
402 #endif
403 
404 #if KMP_HAVE_WEAK_ATTRIBUTE
405 #define KMP_WEAK_ATTRIBUTE_INTERNAL __attribute__((weak))
406 #else
407 #define KMP_WEAK_ATTRIBUTE_INTERNAL /* Nothing */
408 #endif
409 
410 // Define KMP_VERSION_SYMBOL and KMP_EXPAND_NAME
411 #ifndef KMP_STR
412 #define KMP_STR(x) _KMP_STR(x)
413 #define _KMP_STR(x) #x
414 #endif
415 
416 #ifdef KMP_USE_VERSION_SYMBOLS
417 // If using versioned symbols, KMP_EXPAND_NAME prepends
418 // __kmp_api_ to the real API name
419 #define KMP_EXPAND_NAME(api_name) _KMP_EXPAND_NAME(api_name)
420 #define _KMP_EXPAND_NAME(api_name) __kmp_api_##api_name
421 #define KMP_VERSION_SYMBOL(api_name, ver_num, ver_str) \
422  _KMP_VERSION_SYMBOL(api_name, ver_num, ver_str, "VERSION")
423 #define _KMP_VERSION_SYMBOL(api_name, ver_num, ver_str, default_ver) \
424  __typeof__(__kmp_api_##api_name) __kmp_api_##api_name##_##ver_num##_alias \
425  __attribute__((alias(KMP_STR(__kmp_api_##api_name)))); \
426  __asm__( \
427  ".symver " KMP_STR(__kmp_api_##api_name##_##ver_num##_alias) "," KMP_STR( \
428  api_name) "@" ver_str "\n\t"); \
429  __asm__(".symver " KMP_STR(__kmp_api_##api_name) "," KMP_STR( \
430  api_name) "@@" default_ver "\n\t")
431 
432 #define KMP_VERSION_OMPC_SYMBOL(apic_name, api_name, ver_num, ver_str) \
433  _KMP_VERSION_OMPC_SYMBOL(apic_name, api_name, ver_num, ver_str, "VERSION")
434 #define _KMP_VERSION_OMPC_SYMBOL(apic_name, api_name, ver_num, ver_str, \
435  default_ver) \
436  __typeof__(__kmp_api_##apic_name) __kmp_api_##apic_name##_##ver_num##_alias \
437  __attribute__((alias(KMP_STR(__kmp_api_##apic_name)))); \
438  __asm__(".symver " KMP_STR(__kmp_api_##apic_name) "," KMP_STR( \
439  apic_name) "@@" default_ver "\n\t"); \
440  __asm__( \
441  ".symver " KMP_STR(__kmp_api_##apic_name##_##ver_num##_alias) "," KMP_STR( \
442  api_name) "@" ver_str "\n\t")
443 
444 #else // KMP_USE_VERSION_SYMBOLS
445 #define KMP_EXPAND_NAME(api_name) api_name
446 #define KMP_VERSION_SYMBOL(api_name, ver_num, ver_str) /* Nothing */
447 #define KMP_VERSION_OMPC_SYMBOL(apic_name, api_name, ver_num, \
448  ver_str) /* Nothing */
449 #endif // KMP_USE_VERSION_SYMBOLS
450 
451 /* Temporary note: if performance testing of this passes, we can remove
452  all references to KMP_DO_ALIGN and replace with KMP_ALIGN. */
453 #define KMP_DO_ALIGN(bytes) KMP_ALIGN(bytes)
454 #define KMP_ALIGN_CACHE KMP_ALIGN(CACHE_LINE)
455 #define KMP_ALIGN_CACHE_INTERNODE KMP_ALIGN(INTERNODE_CACHE_LINE)
456 
457 /* General purpose fence types for memory operations */
458 enum kmp_mem_fence_type {
459  kmp_no_fence, /* No memory fence */
460  kmp_acquire_fence, /* Acquire (read) memory fence */
461  kmp_release_fence, /* Release (write) memory fence */
462  kmp_full_fence /* Full (read+write) memory fence */
463 };
464 
465 // Synchronization primitives
466 
467 #if KMP_ASM_INTRINS && KMP_OS_WINDOWS && !((KMP_ARCH_AARCH64 || KMP_ARCH_ARM) && (KMP_COMPILER_CLANG || KMP_COMPILER_GCC))
468 
469 #if KMP_MSVC_COMPAT && !KMP_COMPILER_CLANG
470 #pragma intrinsic(InterlockedExchangeAdd)
471 #pragma intrinsic(InterlockedCompareExchange)
472 #pragma intrinsic(InterlockedExchange)
473 #if !KMP_32_BIT_ARCH
474 #pragma intrinsic(InterlockedExchange64)
475 #endif
476 #endif
477 
478 // Using InterlockedIncrement / InterlockedDecrement causes a library loading
479 // ordering problem, so we use InterlockedExchangeAdd instead.
480 #define KMP_TEST_THEN_INC32(p) InterlockedExchangeAdd((volatile long *)(p), 1)
481 #define KMP_TEST_THEN_INC_ACQ32(p) \
482  InterlockedExchangeAdd((volatile long *)(p), 1)
483 #define KMP_TEST_THEN_ADD4_32(p) InterlockedExchangeAdd((volatile long *)(p), 4)
484 #define KMP_TEST_THEN_ADD4_ACQ32(p) \
485  InterlockedExchangeAdd((volatile long *)(p), 4)
486 #define KMP_TEST_THEN_DEC32(p) InterlockedExchangeAdd((volatile long *)(p), -1)
487 #define KMP_TEST_THEN_DEC_ACQ32(p) \
488  InterlockedExchangeAdd((volatile long *)(p), -1)
489 #define KMP_TEST_THEN_ADD32(p, v) \
490  InterlockedExchangeAdd((volatile long *)(p), (v))
491 
492 #define KMP_COMPARE_AND_STORE_RET32(p, cv, sv) \
493  InterlockedCompareExchange((volatile long *)(p), (long)(sv), (long)(cv))
494 
495 #define KMP_XCHG_FIXED32(p, v) \
496  InterlockedExchange((volatile long *)(p), (long)(v))
497 #define KMP_XCHG_FIXED64(p, v) \
498  InterlockedExchange64((volatile kmp_int64 *)(p), (kmp_int64)(v))
499 
500 inline kmp_real32 KMP_XCHG_REAL32(volatile kmp_real32 *p, kmp_real32 v) {
501  kmp_int32 tmp = InterlockedExchange((volatile long *)p, *(long *)&v);
502  return *(kmp_real32 *)&tmp;
503 }
504 
505 #define KMP_TEST_THEN_OR8(p, v) __kmp_test_then_or8((p), (v))
506 #define KMP_TEST_THEN_AND8(p, v) __kmp_test_then_and8((p), (v))
507 #define KMP_TEST_THEN_OR32(p, v) __kmp_test_then_or32((p), (v))
508 #define KMP_TEST_THEN_AND32(p, v) __kmp_test_then_and32((p), (v))
509 #define KMP_TEST_THEN_OR64(p, v) __kmp_test_then_or64((p), (v))
510 #define KMP_TEST_THEN_AND64(p, v) __kmp_test_then_and64((p), (v))
511 
512 extern kmp_int8 __kmp_test_then_or8(volatile kmp_int8 *p, kmp_int8 v);
513 extern kmp_int8 __kmp_test_then_and8(volatile kmp_int8 *p, kmp_int8 v);
514 extern kmp_int32 __kmp_test_then_add32(volatile kmp_int32 *p, kmp_int32 v);
515 extern kmp_uint32 __kmp_test_then_or32(volatile kmp_uint32 *p, kmp_uint32 v);
516 extern kmp_uint32 __kmp_test_then_and32(volatile kmp_uint32 *p, kmp_uint32 v);
517 extern kmp_int64 __kmp_test_then_add64(volatile kmp_int64 *p, kmp_int64 v);
518 extern kmp_uint64 __kmp_test_then_or64(volatile kmp_uint64 *p, kmp_uint64 v);
519 extern kmp_uint64 __kmp_test_then_and64(volatile kmp_uint64 *p, kmp_uint64 v);
520 
521 #if KMP_ARCH_AARCH64 && KMP_COMPILER_MSVC && !KMP_COMPILER_CLANG
522 #define KMP_TEST_THEN_INC64(p) _InterlockedExchangeAdd64((p), 1LL)
523 #define KMP_TEST_THEN_INC_ACQ64(p) _InterlockedExchangeAdd64_acq((p), 1LL)
524 #define KMP_TEST_THEN_ADD4_64(p) _InterlockedExchangeAdd64((p), 4LL)
525 // #define KMP_TEST_THEN_ADD4_ACQ64(p) _InterlockedExchangeAdd64_acq((p), 4LL)
526 // #define KMP_TEST_THEN_DEC64(p) _InterlockedExchangeAdd64((p), -1LL)
527 // #define KMP_TEST_THEN_DEC_ACQ64(p) _InterlockedExchangeAdd64_acq((p), -1LL)
528 // #define KMP_TEST_THEN_ADD8(p, v) _InterlockedExchangeAdd8((p), (v))
529 #define KMP_TEST_THEN_ADD64(p, v) _InterlockedExchangeAdd64((p), (v))
530 
531 #define KMP_COMPARE_AND_STORE_ACQ8(p, cv, sv) \
532  __kmp_compare_and_store_acq8((p), (cv), (sv))
533 #define KMP_COMPARE_AND_STORE_REL8(p, cv, sv) \
534  __kmp_compare_and_store_rel8((p), (cv), (sv))
535 #define KMP_COMPARE_AND_STORE_ACQ16(p, cv, sv) \
536  __kmp_compare_and_store_acq16((p), (cv), (sv))
537 /*
538 #define KMP_COMPARE_AND_STORE_REL16(p, cv, sv) \
539  __kmp_compare_and_store_rel16((p), (cv), (sv))
540 */
541 #define KMP_COMPARE_AND_STORE_ACQ32(p, cv, sv) \
542  __kmp_compare_and_store_acq32((volatile kmp_int32 *)(p), (kmp_int32)(cv), \
543  (kmp_int32)(sv))
544 #define KMP_COMPARE_AND_STORE_REL32(p, cv, sv) \
545  __kmp_compare_and_store_rel32((volatile kmp_int32 *)(p), (kmp_int32)(cv), \
546  (kmp_int32)(sv))
547 #define KMP_COMPARE_AND_STORE_ACQ64(p, cv, sv) \
548  __kmp_compare_and_store_acq64((volatile kmp_int64 *)(p), (kmp_int64)(cv), \
549  (kmp_int64)(sv))
550 #define KMP_COMPARE_AND_STORE_REL64(p, cv, sv) \
551  __kmp_compare_and_store_rel64((volatile kmp_int64 *)(p), (kmp_int64)(cv), \
552  (kmp_int64)(sv))
553 #define KMP_COMPARE_AND_STORE_PTR(p, cv, sv) \
554  __kmp_compare_and_store_ptr((void *volatile *)(p), (void *)(cv), (void *)(sv))
555 
556 // KMP_COMPARE_AND_STORE expects this order: pointer, compare, exchange
557 // _InterlockedCompareExchange expects this order: pointer, exchange, compare
558 // KMP_COMPARE_AND_STORE also returns a bool indicating a successful write. A
559 // write is successful if the return value of _InterlockedCompareExchange is the
560 // same as the compare value.
561 inline kmp_int8 __kmp_compare_and_store_acq8(volatile kmp_int8 *p, kmp_int8 cv,
562  kmp_int8 sv) {
563  return _InterlockedCompareExchange8_acq(p, sv, cv) == cv;
564 }
565 
566 inline kmp_int8 __kmp_compare_and_store_rel8(volatile kmp_int8 *p, kmp_int8 cv,
567  kmp_int8 sv) {
568  return _InterlockedCompareExchange8_rel(p, sv, cv) == cv;
569 }
570 
571 inline kmp_int16 __kmp_compare_and_store_acq16(volatile kmp_int16 *p,
572  kmp_int16 cv, kmp_int16 sv) {
573  return _InterlockedCompareExchange16_acq(p, sv, cv) == cv;
574 }
575 
576 inline kmp_int16 __kmp_compare_and_store_rel16(volatile kmp_int16 *p,
577  kmp_int16 cv, kmp_int16 sv) {
578  return _InterlockedCompareExchange16_rel(p, sv, cv) == cv;
579 }
580 
581 inline kmp_int32 __kmp_compare_and_store_acq32(volatile kmp_int32 *p,
582  kmp_int32 cv, kmp_int32 sv) {
583  return _InterlockedCompareExchange_acq((volatile long *)p, sv, cv) == cv;
584 }
585 
586 inline kmp_int32 __kmp_compare_and_store_rel32(volatile kmp_int32 *p,
587  kmp_int32 cv, kmp_int32 sv) {
588  return _InterlockedCompareExchange_rel((volatile long *)p, sv, cv) == cv;
589 }
590 
591 inline kmp_int32 __kmp_compare_and_store_acq64(volatile kmp_int64 *p,
592  kmp_int64 cv, kmp_int64 sv) {
593  return _InterlockedCompareExchange64_acq(p, sv, cv) == cv;
594 }
595 
596 inline kmp_int32 __kmp_compare_and_store_rel64(volatile kmp_int64 *p,
597  kmp_int64 cv, kmp_int64 sv) {
598  return _InterlockedCompareExchange64_rel(p, sv, cv) == cv;
599 }
600 
601 inline kmp_int32 __kmp_compare_and_store_ptr(void *volatile *p, void *cv,
602  void *sv) {
603  return _InterlockedCompareExchangePointer(p, sv, cv) == cv;
604 }
605 
606 // The _RET versions return the value instead of a bool
607 
608 #define KMP_COMPARE_AND_STORE_RET8(p, cv, sv) \
609  _InterlockedCompareExchange8((p), (sv), (cv))
610 #define KMP_COMPARE_AND_STORE_RET16(p, cv, sv) \
611  _InterlockedCompareExchange16((p), (sv), (cv))
612 
613 #define KMP_COMPARE_AND_STORE_RET64(p, cv, sv) \
614  _InterlockedCompareExchange64((volatile kmp_int64 *)(p), (kmp_int64)(sv), \
615  (kmp_int64)(cv))
616 
617 
618 #define KMP_XCHG_FIXED8(p, v) \
619  _InterlockedExchange8((volatile kmp_int8 *)(p), (kmp_int8)(v));
620 #define KMP_XCHG_FIXED16(p, v) _InterlockedExchange16((p), (v));
621 #define KMP_XCHG_REAL64(p, v) __kmp_xchg_real64((p), (v));
622 
623 inline kmp_real64 __kmp_xchg_real64(volatile kmp_real64 *p, kmp_real64 v) {
624  kmp_int64 tmp = _InterlockedExchange64((volatile kmp_int64 *)p, *(kmp_int64
625  *)&v); return *(kmp_real64 *)&tmp;
626 }
627 
628 #else // !KMP_ARCH_AARCH64
629 
630 // Routines that we still need to implement in assembly.
631 extern kmp_int8 __kmp_test_then_add8(volatile kmp_int8 *p, kmp_int8 v);
632 
633 extern kmp_int8 __kmp_compare_and_store8(volatile kmp_int8 *p, kmp_int8 cv,
634  kmp_int8 sv);
635 extern kmp_int16 __kmp_compare_and_store16(volatile kmp_int16 *p, kmp_int16 cv,
636  kmp_int16 sv);
637 extern kmp_int32 __kmp_compare_and_store32(volatile kmp_int32 *p, kmp_int32 cv,
638  kmp_int32 sv);
639 extern kmp_int32 __kmp_compare_and_store64(volatile kmp_int64 *p, kmp_int64 cv,
640  kmp_int64 sv);
641 extern kmp_int8 __kmp_compare_and_store_ret8(volatile kmp_int8 *p, kmp_int8 cv,
642  kmp_int8 sv);
643 extern kmp_int16 __kmp_compare_and_store_ret16(volatile kmp_int16 *p,
644  kmp_int16 cv, kmp_int16 sv);
645 extern kmp_int32 __kmp_compare_and_store_ret32(volatile kmp_int32 *p,
646  kmp_int32 cv, kmp_int32 sv);
647 extern kmp_int64 __kmp_compare_and_store_ret64(volatile kmp_int64 *p,
648  kmp_int64 cv, kmp_int64 sv);
649 
650 extern kmp_int8 __kmp_xchg_fixed8(volatile kmp_int8 *p, kmp_int8 v);
651 extern kmp_int16 __kmp_xchg_fixed16(volatile kmp_int16 *p, kmp_int16 v);
652 extern kmp_int32 __kmp_xchg_fixed32(volatile kmp_int32 *p, kmp_int32 v);
653 extern kmp_int64 __kmp_xchg_fixed64(volatile kmp_int64 *p, kmp_int64 v);
654 extern kmp_real32 __kmp_xchg_real32(volatile kmp_real32 *p, kmp_real32 v);
655 extern kmp_real64 __kmp_xchg_real64(volatile kmp_real64 *p, kmp_real64 v);
656 
657 //#define KMP_TEST_THEN_INC32(p) __kmp_test_then_add32((p), 1)
658 //#define KMP_TEST_THEN_INC_ACQ32(p) __kmp_test_then_add32((p), 1)
659 #define KMP_TEST_THEN_INC64(p) __kmp_test_then_add64((p), 1LL)
660 #define KMP_TEST_THEN_INC_ACQ64(p) __kmp_test_then_add64((p), 1LL)
661 //#define KMP_TEST_THEN_ADD4_32(p) __kmp_test_then_add32((p), 4)
662 //#define KMP_TEST_THEN_ADD4_ACQ32(p) __kmp_test_then_add32((p), 4)
663 #define KMP_TEST_THEN_ADD4_64(p) __kmp_test_then_add64((p), 4LL)
664 #define KMP_TEST_THEN_ADD4_ACQ64(p) __kmp_test_then_add64((p), 4LL)
665 //#define KMP_TEST_THEN_DEC32(p) __kmp_test_then_add32((p), -1)
666 //#define KMP_TEST_THEN_DEC_ACQ32(p) __kmp_test_then_add32((p), -1)
667 #define KMP_TEST_THEN_DEC64(p) __kmp_test_then_add64((p), -1LL)
668 #define KMP_TEST_THEN_DEC_ACQ64(p) __kmp_test_then_add64((p), -1LL)
669 //#define KMP_TEST_THEN_ADD32(p, v) __kmp_test_then_add32((p), (v))
670 #define KMP_TEST_THEN_ADD8(p, v) __kmp_test_then_add8((p), (v))
671 #define KMP_TEST_THEN_ADD64(p, v) __kmp_test_then_add64((p), (v))
672 
673 
674 #define KMP_COMPARE_AND_STORE_ACQ8(p, cv, sv) \
675  __kmp_compare_and_store8((p), (cv), (sv))
676 #define KMP_COMPARE_AND_STORE_REL8(p, cv, sv) \
677  __kmp_compare_and_store8((p), (cv), (sv))
678 #define KMP_COMPARE_AND_STORE_ACQ16(p, cv, sv) \
679  __kmp_compare_and_store16((p), (cv), (sv))
680 #define KMP_COMPARE_AND_STORE_REL16(p, cv, sv) \
681  __kmp_compare_and_store16((p), (cv), (sv))
682 #define KMP_COMPARE_AND_STORE_ACQ32(p, cv, sv) \
683  __kmp_compare_and_store32((volatile kmp_int32 *)(p), (kmp_int32)(cv), \
684  (kmp_int32)(sv))
685 #define KMP_COMPARE_AND_STORE_REL32(p, cv, sv) \
686  __kmp_compare_and_store32((volatile kmp_int32 *)(p), (kmp_int32)(cv), \
687  (kmp_int32)(sv))
688 #define KMP_COMPARE_AND_STORE_ACQ64(p, cv, sv) \
689  __kmp_compare_and_store64((volatile kmp_int64 *)(p), (kmp_int64)(cv), \
690  (kmp_int64)(sv))
691 #define KMP_COMPARE_AND_STORE_REL64(p, cv, sv) \
692  __kmp_compare_and_store64((volatile kmp_int64 *)(p), (kmp_int64)(cv), \
693  (kmp_int64)(sv))
694 
695 #if KMP_ARCH_X86
696 #define KMP_COMPARE_AND_STORE_PTR(p, cv, sv) \
697  __kmp_compare_and_store32((volatile kmp_int32 *)(p), (kmp_int32)(cv), \
698  (kmp_int32)(sv))
699 #else /* 64 bit pointers */
700 #define KMP_COMPARE_AND_STORE_PTR(p, cv, sv) \
701  __kmp_compare_and_store64((volatile kmp_int64 *)(p), (kmp_int64)(cv), \
702  (kmp_int64)(sv))
703 #endif /* KMP_ARCH_X86 */
704 
705 #define KMP_COMPARE_AND_STORE_RET8(p, cv, sv) \
706  __kmp_compare_and_store_ret8((p), (cv), (sv))
707 #define KMP_COMPARE_AND_STORE_RET16(p, cv, sv) \
708  __kmp_compare_and_store_ret16((p), (cv), (sv))
709 #define KMP_COMPARE_AND_STORE_RET64(p, cv, sv) \
710  __kmp_compare_and_store_ret64((volatile kmp_int64 *)(p), (kmp_int64)(cv), \
711  (kmp_int64)(sv))
712 
713 #define KMP_XCHG_FIXED8(p, v) \
714  __kmp_xchg_fixed8((volatile kmp_int8 *)(p), (kmp_int8)(v));
715 #define KMP_XCHG_FIXED16(p, v) __kmp_xchg_fixed16((p), (v));
716 //#define KMP_XCHG_FIXED32(p, v) __kmp_xchg_fixed32((p), (v));
717 //#define KMP_XCHG_FIXED64(p, v) __kmp_xchg_fixed64((p), (v));
718 //#define KMP_XCHG_REAL32(p, v) __kmp_xchg_real32((p), (v));
719 #define KMP_XCHG_REAL64(p, v) __kmp_xchg_real64((p), (v));
720 #endif
721 
722 #elif (KMP_ASM_INTRINS && KMP_OS_UNIX) || !(KMP_ARCH_X86 || KMP_ARCH_X86_64)
723 
724 /* cast p to correct type so that proper intrinsic will be used */
725 #define KMP_TEST_THEN_INC32(p) \
726  __sync_fetch_and_add((volatile kmp_int32 *)(p), 1)
727 #define KMP_TEST_THEN_INC_ACQ32(p) \
728  __sync_fetch_and_add((volatile kmp_int32 *)(p), 1)
729 #if KMP_ARCH_MIPS
730 #define KMP_TEST_THEN_INC64(p) \
731  __atomic_fetch_add((volatile kmp_int64 *)(p), 1LL, __ATOMIC_SEQ_CST)
732 #define KMP_TEST_THEN_INC_ACQ64(p) \
733  __atomic_fetch_add((volatile kmp_int64 *)(p), 1LL, __ATOMIC_SEQ_CST)
734 #else
735 #define KMP_TEST_THEN_INC64(p) \
736  __sync_fetch_and_add((volatile kmp_int64 *)(p), 1LL)
737 #define KMP_TEST_THEN_INC_ACQ64(p) \
738  __sync_fetch_and_add((volatile kmp_int64 *)(p), 1LL)
739 #endif
740 #define KMP_TEST_THEN_ADD4_32(p) \
741  __sync_fetch_and_add((volatile kmp_int32 *)(p), 4)
742 #define KMP_TEST_THEN_ADD4_ACQ32(p) \
743  __sync_fetch_and_add((volatile kmp_int32 *)(p), 4)
744 #if KMP_ARCH_MIPS
745 #define KMP_TEST_THEN_ADD4_64(p) \
746  __atomic_fetch_add((volatile kmp_int64 *)(p), 4LL, __ATOMIC_SEQ_CST)
747 #define KMP_TEST_THEN_ADD4_ACQ64(p) \
748  __atomic_fetch_add((volatile kmp_int64 *)(p), 4LL, __ATOMIC_SEQ_CST)
749 #define KMP_TEST_THEN_DEC64(p) \
750  __atomic_fetch_sub((volatile kmp_int64 *)(p), 1LL, __ATOMIC_SEQ_CST)
751 #define KMP_TEST_THEN_DEC_ACQ64(p) \
752  __atomic_fetch_sub((volatile kmp_int64 *)(p), 1LL, __ATOMIC_SEQ_CST)
753 #else
754 #define KMP_TEST_THEN_ADD4_64(p) \
755  __sync_fetch_and_add((volatile kmp_int64 *)(p), 4LL)
756 #define KMP_TEST_THEN_ADD4_ACQ64(p) \
757  __sync_fetch_and_add((volatile kmp_int64 *)(p), 4LL)
758 #define KMP_TEST_THEN_DEC64(p) \
759  __sync_fetch_and_sub((volatile kmp_int64 *)(p), 1LL)
760 #define KMP_TEST_THEN_DEC_ACQ64(p) \
761  __sync_fetch_and_sub((volatile kmp_int64 *)(p), 1LL)
762 #endif
763 #define KMP_TEST_THEN_DEC32(p) \
764  __sync_fetch_and_sub((volatile kmp_int32 *)(p), 1)
765 #define KMP_TEST_THEN_DEC_ACQ32(p) \
766  __sync_fetch_and_sub((volatile kmp_int32 *)(p), 1)
767 #define KMP_TEST_THEN_ADD8(p, v) \
768  __sync_fetch_and_add((volatile kmp_int8 *)(p), (kmp_int8)(v))
769 #define KMP_TEST_THEN_ADD32(p, v) \
770  __sync_fetch_and_add((volatile kmp_int32 *)(p), (kmp_int32)(v))
771 #if KMP_ARCH_MIPS
772 #define KMP_TEST_THEN_ADD64(p, v) \
773  __atomic_fetch_add((volatile kmp_uint64 *)(p), (kmp_uint64)(v), \
774  __ATOMIC_SEQ_CST)
775 #else
776 #define KMP_TEST_THEN_ADD64(p, v) \
777  __sync_fetch_and_add((volatile kmp_int64 *)(p), (kmp_int64)(v))
778 #endif
779 
780 #define KMP_TEST_THEN_OR8(p, v) \
781  __sync_fetch_and_or((volatile kmp_int8 *)(p), (kmp_int8)(v))
782 #define KMP_TEST_THEN_AND8(p, v) \
783  __sync_fetch_and_and((volatile kmp_int8 *)(p), (kmp_int8)(v))
784 #define KMP_TEST_THEN_OR32(p, v) \
785  __sync_fetch_and_or((volatile kmp_uint32 *)(p), (kmp_uint32)(v))
786 #define KMP_TEST_THEN_AND32(p, v) \
787  __sync_fetch_and_and((volatile kmp_uint32 *)(p), (kmp_uint32)(v))
788 #if KMP_ARCH_MIPS
789 #define KMP_TEST_THEN_OR64(p, v) \
790  __atomic_fetch_or((volatile kmp_uint64 *)(p), (kmp_uint64)(v), \
791  __ATOMIC_SEQ_CST)
792 #define KMP_TEST_THEN_AND64(p, v) \
793  __atomic_fetch_and((volatile kmp_uint64 *)(p), (kmp_uint64)(v), \
794  __ATOMIC_SEQ_CST)
795 #else
796 #define KMP_TEST_THEN_OR64(p, v) \
797  __sync_fetch_and_or((volatile kmp_uint64 *)(p), (kmp_uint64)(v))
798 #define KMP_TEST_THEN_AND64(p, v) \
799  __sync_fetch_and_and((volatile kmp_uint64 *)(p), (kmp_uint64)(v))
800 #endif
801 
802 #define KMP_COMPARE_AND_STORE_ACQ8(p, cv, sv) \
803  __sync_bool_compare_and_swap((volatile kmp_uint8 *)(p), (kmp_uint8)(cv), \
804  (kmp_uint8)(sv))
805 #define KMP_COMPARE_AND_STORE_REL8(p, cv, sv) \
806  __sync_bool_compare_and_swap((volatile kmp_uint8 *)(p), (kmp_uint8)(cv), \
807  (kmp_uint8)(sv))
808 #define KMP_COMPARE_AND_STORE_ACQ16(p, cv, sv) \
809  __sync_bool_compare_and_swap((volatile kmp_uint16 *)(p), (kmp_uint16)(cv), \
810  (kmp_uint16)(sv))
811 #define KMP_COMPARE_AND_STORE_REL16(p, cv, sv) \
812  __sync_bool_compare_and_swap((volatile kmp_uint16 *)(p), (kmp_uint16)(cv), \
813  (kmp_uint16)(sv))
814 #define KMP_COMPARE_AND_STORE_ACQ32(p, cv, sv) \
815  __sync_bool_compare_and_swap((volatile kmp_uint32 *)(p), (kmp_uint32)(cv), \
816  (kmp_uint32)(sv))
817 #define KMP_COMPARE_AND_STORE_REL32(p, cv, sv) \
818  __sync_bool_compare_and_swap((volatile kmp_uint32 *)(p), (kmp_uint32)(cv), \
819  (kmp_uint32)(sv))
820 #define KMP_COMPARE_AND_STORE_PTR(p, cv, sv) \
821  __sync_bool_compare_and_swap((void *volatile *)(p), (void *)(cv), \
822  (void *)(sv))
823 
824 #define KMP_COMPARE_AND_STORE_RET8(p, cv, sv) \
825  __sync_val_compare_and_swap((volatile kmp_uint8 *)(p), (kmp_uint8)(cv), \
826  (kmp_uint8)(sv))
827 #define KMP_COMPARE_AND_STORE_RET16(p, cv, sv) \
828  __sync_val_compare_and_swap((volatile kmp_uint16 *)(p), (kmp_uint16)(cv), \
829  (kmp_uint16)(sv))
830 #define KMP_COMPARE_AND_STORE_RET32(p, cv, sv) \
831  __sync_val_compare_and_swap((volatile kmp_uint32 *)(p), (kmp_uint32)(cv), \
832  (kmp_uint32)(sv))
833 #if KMP_ARCH_MIPS
834 static inline bool mips_sync_bool_compare_and_swap(volatile kmp_uint64 *p,
835  kmp_uint64 cv,
836  kmp_uint64 sv) {
837  return __atomic_compare_exchange(p, &cv, &sv, false, __ATOMIC_SEQ_CST,
838  __ATOMIC_SEQ_CST);
839 }
840 static inline bool mips_sync_val_compare_and_swap(volatile kmp_uint64 *p,
841  kmp_uint64 cv,
842  kmp_uint64 sv) {
843  __atomic_compare_exchange(p, &cv, &sv, false, __ATOMIC_SEQ_CST,
844  __ATOMIC_SEQ_CST);
845  return cv;
846 }
847 #define KMP_COMPARE_AND_STORE_ACQ64(p, cv, sv) \
848  mips_sync_bool_compare_and_swap((volatile kmp_uint64 *)(p), \
849  (kmp_uint64)(cv), (kmp_uint64)(sv))
850 #define KMP_COMPARE_AND_STORE_REL64(p, cv, sv) \
851  mips_sync_bool_compare_and_swap((volatile kmp_uint64 *)(p), \
852  (kmp_uint64)(cv), (kmp_uint64)(sv))
853 #define KMP_COMPARE_AND_STORE_RET64(p, cv, sv) \
854  mips_sync_val_compare_and_swap((volatile kmp_uint64 *)(p), (kmp_uint64)(cv), \
855  (kmp_uint64)(sv))
856 #else
857 #define KMP_COMPARE_AND_STORE_ACQ64(p, cv, sv) \
858  __sync_bool_compare_and_swap((volatile kmp_uint64 *)(p), (kmp_uint64)(cv), \
859  (kmp_uint64)(sv))
860 #define KMP_COMPARE_AND_STORE_REL64(p, cv, sv) \
861  __sync_bool_compare_and_swap((volatile kmp_uint64 *)(p), (kmp_uint64)(cv), \
862  (kmp_uint64)(sv))
863 #define KMP_COMPARE_AND_STORE_RET64(p, cv, sv) \
864  __sync_val_compare_and_swap((volatile kmp_uint64 *)(p), (kmp_uint64)(cv), \
865  (kmp_uint64)(sv))
866 #endif
867 
868 #if KMP_OS_DARWIN && defined(__INTEL_COMPILER) && __INTEL_COMPILER >= 1800
869 #define KMP_XCHG_FIXED8(p, v) \
870  __atomic_exchange_1((volatile kmp_uint8 *)(p), (kmp_uint8)(v), \
871  __ATOMIC_SEQ_CST)
872 #else
873 #define KMP_XCHG_FIXED8(p, v) \
874  __sync_lock_test_and_set((volatile kmp_uint8 *)(p), (kmp_uint8)(v))
875 #endif
876 #define KMP_XCHG_FIXED16(p, v) \
877  __sync_lock_test_and_set((volatile kmp_uint16 *)(p), (kmp_uint16)(v))
878 #define KMP_XCHG_FIXED32(p, v) \
879  __sync_lock_test_and_set((volatile kmp_uint32 *)(p), (kmp_uint32)(v))
880 #define KMP_XCHG_FIXED64(p, v) \
881  __sync_lock_test_and_set((volatile kmp_uint64 *)(p), (kmp_uint64)(v))
882 
883 inline kmp_real32 KMP_XCHG_REAL32(volatile kmp_real32 *p, kmp_real32 v) {
884  volatile kmp_uint32 *up;
885  kmp_uint32 uv;
886  memcpy(&up, &p, sizeof(up));
887  memcpy(&uv, &v, sizeof(uv));
888  kmp_int32 tmp = __sync_lock_test_and_set(up, uv);
889  kmp_real32 ftmp;
890  memcpy(&ftmp, &tmp, sizeof(tmp));
891  return ftmp;
892 }
893 
894 inline kmp_real64 KMP_XCHG_REAL64(volatile kmp_real64 *p, kmp_real64 v) {
895  volatile kmp_uint64 *up;
896  kmp_uint64 uv;
897  memcpy(&up, &p, sizeof(up));
898  memcpy(&uv, &v, sizeof(uv));
899  kmp_int64 tmp = __sync_lock_test_and_set(up, uv);
900  kmp_real64 dtmp;
901  memcpy(&dtmp, &tmp, sizeof(tmp));
902  return dtmp;
903 }
904 
905 #else
906 
907 extern kmp_int8 __kmp_test_then_add8(volatile kmp_int8 *p, kmp_int8 v);
908 extern kmp_int8 __kmp_test_then_or8(volatile kmp_int8 *p, kmp_int8 v);
909 extern kmp_int8 __kmp_test_then_and8(volatile kmp_int8 *p, kmp_int8 v);
910 extern kmp_int32 __kmp_test_then_add32(volatile kmp_int32 *p, kmp_int32 v);
911 extern kmp_uint32 __kmp_test_then_or32(volatile kmp_uint32 *p, kmp_uint32 v);
912 extern kmp_uint32 __kmp_test_then_and32(volatile kmp_uint32 *p, kmp_uint32 v);
913 extern kmp_int64 __kmp_test_then_add64(volatile kmp_int64 *p, kmp_int64 v);
914 extern kmp_uint64 __kmp_test_then_or64(volatile kmp_uint64 *p, kmp_uint64 v);
915 extern kmp_uint64 __kmp_test_then_and64(volatile kmp_uint64 *p, kmp_uint64 v);
916 
917 extern kmp_int8 __kmp_compare_and_store8(volatile kmp_int8 *p, kmp_int8 cv,
918  kmp_int8 sv);
919 extern kmp_int16 __kmp_compare_and_store16(volatile kmp_int16 *p, kmp_int16 cv,
920  kmp_int16 sv);
921 extern kmp_int32 __kmp_compare_and_store32(volatile kmp_int32 *p, kmp_int32 cv,
922  kmp_int32 sv);
923 extern kmp_int32 __kmp_compare_and_store64(volatile kmp_int64 *p, kmp_int64 cv,
924  kmp_int64 sv);
925 extern kmp_int8 __kmp_compare_and_store_ret8(volatile kmp_int8 *p, kmp_int8 cv,
926  kmp_int8 sv);
927 extern kmp_int16 __kmp_compare_and_store_ret16(volatile kmp_int16 *p,
928  kmp_int16 cv, kmp_int16 sv);
929 extern kmp_int32 __kmp_compare_and_store_ret32(volatile kmp_int32 *p,
930  kmp_int32 cv, kmp_int32 sv);
931 extern kmp_int64 __kmp_compare_and_store_ret64(volatile kmp_int64 *p,
932  kmp_int64 cv, kmp_int64 sv);
933 
934 extern kmp_int8 __kmp_xchg_fixed8(volatile kmp_int8 *p, kmp_int8 v);
935 extern kmp_int16 __kmp_xchg_fixed16(volatile kmp_int16 *p, kmp_int16 v);
936 extern kmp_int32 __kmp_xchg_fixed32(volatile kmp_int32 *p, kmp_int32 v);
937 extern kmp_int64 __kmp_xchg_fixed64(volatile kmp_int64 *p, kmp_int64 v);
938 extern kmp_real32 __kmp_xchg_real32(volatile kmp_real32 *p, kmp_real32 v);
939 extern kmp_real64 __kmp_xchg_real64(volatile kmp_real64 *p, kmp_real64 v);
940 
941 #define KMP_TEST_THEN_INC32(p) \
942  __kmp_test_then_add32((volatile kmp_int32 *)(p), 1)
943 #define KMP_TEST_THEN_INC_ACQ32(p) \
944  __kmp_test_then_add32((volatile kmp_int32 *)(p), 1)
945 #define KMP_TEST_THEN_INC64(p) \
946  __kmp_test_then_add64((volatile kmp_int64 *)(p), 1LL)
947 #define KMP_TEST_THEN_INC_ACQ64(p) \
948  __kmp_test_then_add64((volatile kmp_int64 *)(p), 1LL)
949 #define KMP_TEST_THEN_ADD4_32(p) \
950  __kmp_test_then_add32((volatile kmp_int32 *)(p), 4)
951 #define KMP_TEST_THEN_ADD4_ACQ32(p) \
952  __kmp_test_then_add32((volatile kmp_int32 *)(p), 4)
953 #define KMP_TEST_THEN_ADD4_64(p) \
954  __kmp_test_then_add64((volatile kmp_int64 *)(p), 4LL)
955 #define KMP_TEST_THEN_ADD4_ACQ64(p) \
956  __kmp_test_then_add64((volatile kmp_int64 *)(p), 4LL)
957 #define KMP_TEST_THEN_DEC32(p) \
958  __kmp_test_then_add32((volatile kmp_int32 *)(p), -1)
959 #define KMP_TEST_THEN_DEC_ACQ32(p) \
960  __kmp_test_then_add32((volatile kmp_int32 *)(p), -1)
961 #define KMP_TEST_THEN_DEC64(p) \
962  __kmp_test_then_add64((volatile kmp_int64 *)(p), -1LL)
963 #define KMP_TEST_THEN_DEC_ACQ64(p) \
964  __kmp_test_then_add64((volatile kmp_int64 *)(p), -1LL)
965 #define KMP_TEST_THEN_ADD8(p, v) \
966  __kmp_test_then_add8((volatile kmp_int8 *)(p), (kmp_int8)(v))
967 #define KMP_TEST_THEN_ADD32(p, v) \
968  __kmp_test_then_add32((volatile kmp_int32 *)(p), (kmp_int32)(v))
969 #define KMP_TEST_THEN_ADD64(p, v) \
970  __kmp_test_then_add64((volatile kmp_int64 *)(p), (kmp_int64)(v))
971 
972 #define KMP_TEST_THEN_OR8(p, v) \
973  __kmp_test_then_or8((volatile kmp_int8 *)(p), (kmp_int8)(v))
974 #define KMP_TEST_THEN_AND8(p, v) \
975  __kmp_test_then_and8((volatile kmp_int8 *)(p), (kmp_int8)(v))
976 #define KMP_TEST_THEN_OR32(p, v) \
977  __kmp_test_then_or32((volatile kmp_uint32 *)(p), (kmp_uint32)(v))
978 #define KMP_TEST_THEN_AND32(p, v) \
979  __kmp_test_then_and32((volatile kmp_uint32 *)(p), (kmp_uint32)(v))
980 #define KMP_TEST_THEN_OR64(p, v) \
981  __kmp_test_then_or64((volatile kmp_uint64 *)(p), (kmp_uint64)(v))
982 #define KMP_TEST_THEN_AND64(p, v) \
983  __kmp_test_then_and64((volatile kmp_uint64 *)(p), (kmp_uint64)(v))
984 
985 #define KMP_COMPARE_AND_STORE_ACQ8(p, cv, sv) \
986  __kmp_compare_and_store8((volatile kmp_int8 *)(p), (kmp_int8)(cv), \
987  (kmp_int8)(sv))
988 #define KMP_COMPARE_AND_STORE_REL8(p, cv, sv) \
989  __kmp_compare_and_store8((volatile kmp_int8 *)(p), (kmp_int8)(cv), \
990  (kmp_int8)(sv))
991 #define KMP_COMPARE_AND_STORE_ACQ16(p, cv, sv) \
992  __kmp_compare_and_store16((volatile kmp_int16 *)(p), (kmp_int16)(cv), \
993  (kmp_int16)(sv))
994 #define KMP_COMPARE_AND_STORE_REL16(p, cv, sv) \
995  __kmp_compare_and_store16((volatile kmp_int16 *)(p), (kmp_int16)(cv), \
996  (kmp_int16)(sv))
997 #define KMP_COMPARE_AND_STORE_ACQ32(p, cv, sv) \
998  __kmp_compare_and_store32((volatile kmp_int32 *)(p), (kmp_int32)(cv), \
999  (kmp_int32)(sv))
1000 #define KMP_COMPARE_AND_STORE_REL32(p, cv, sv) \
1001  __kmp_compare_and_store32((volatile kmp_int32 *)(p), (kmp_int32)(cv), \
1002  (kmp_int32)(sv))
1003 #define KMP_COMPARE_AND_STORE_ACQ64(p, cv, sv) \
1004  __kmp_compare_and_store64((volatile kmp_int64 *)(p), (kmp_int64)(cv), \
1005  (kmp_int64)(sv))
1006 #define KMP_COMPARE_AND_STORE_REL64(p, cv, sv) \
1007  __kmp_compare_and_store64((volatile kmp_int64 *)(p), (kmp_int64)(cv), \
1008  (kmp_int64)(sv))
1009 
1010 #if KMP_ARCH_X86
1011 #define KMP_COMPARE_AND_STORE_PTR(p, cv, sv) \
1012  __kmp_compare_and_store32((volatile kmp_int32 *)(p), (kmp_int32)(cv), \
1013  (kmp_int32)(sv))
1014 #else /* 64 bit pointers */
1015 #define KMP_COMPARE_AND_STORE_PTR(p, cv, sv) \
1016  __kmp_compare_and_store64((volatile kmp_int64 *)(p), (kmp_int64)(cv), \
1017  (kmp_int64)(sv))
1018 #endif /* KMP_ARCH_X86 */
1019 
1020 #define KMP_COMPARE_AND_STORE_RET8(p, cv, sv) \
1021  __kmp_compare_and_store_ret8((p), (cv), (sv))
1022 #define KMP_COMPARE_AND_STORE_RET16(p, cv, sv) \
1023  __kmp_compare_and_store_ret16((p), (cv), (sv))
1024 #define KMP_COMPARE_AND_STORE_RET32(p, cv, sv) \
1025  __kmp_compare_and_store_ret32((volatile kmp_int32 *)(p), (kmp_int32)(cv), \
1026  (kmp_int32)(sv))
1027 #define KMP_COMPARE_AND_STORE_RET64(p, cv, sv) \
1028  __kmp_compare_and_store_ret64((volatile kmp_int64 *)(p), (kmp_int64)(cv), \
1029  (kmp_int64)(sv))
1030 
1031 #define KMP_XCHG_FIXED8(p, v) \
1032  __kmp_xchg_fixed8((volatile kmp_int8 *)(p), (kmp_int8)(v));
1033 #define KMP_XCHG_FIXED16(p, v) __kmp_xchg_fixed16((p), (v));
1034 #define KMP_XCHG_FIXED32(p, v) __kmp_xchg_fixed32((p), (v));
1035 #define KMP_XCHG_FIXED64(p, v) __kmp_xchg_fixed64((p), (v));
1036 #define KMP_XCHG_REAL32(p, v) __kmp_xchg_real32((p), (v));
1037 #define KMP_XCHG_REAL64(p, v) __kmp_xchg_real64((p), (v));
1038 
1039 #endif /* KMP_ASM_INTRINS */
1040 
1041 /* ------------- relaxed consistency memory model stuff ------------------ */
1042 
1043 #if KMP_OS_WINDOWS
1044 #ifdef __ABSOFT_WIN
1045 #define KMP_MB() asm("nop")
1046 #define KMP_IMB() asm("nop")
1047 #else
1048 #define KMP_MB() /* _asm{ nop } */
1049 #define KMP_IMB() /* _asm{ nop } */
1050 #endif
1051 #endif /* KMP_OS_WINDOWS */
1052 
1053 #if KMP_ARCH_PPC64 || KMP_ARCH_ARM || KMP_ARCH_AARCH64 || KMP_ARCH_MIPS || \
1054  KMP_ARCH_MIPS64 || KMP_ARCH_RISCV64 || KMP_ARCH_LOONGARCH64 || \
1055  KMP_ARCH_VE || KMP_ARCH_S390X || KMP_ARCH_PPC || KMP_ARCH_AARCH64_32 || \
1056  KMP_ARCH_SPARC
1057 #if KMP_OS_WINDOWS
1058 #undef KMP_MB
1059 #define KMP_MB() std::atomic_thread_fence(std::memory_order_seq_cst)
1060 #else /* !KMP_OS_WINDOWS */
1061 #define KMP_MB() __sync_synchronize()
1062 #endif
1063 #endif
1064 
1065 #ifndef KMP_MB
1066 #define KMP_MB() /* nothing to do */
1067 #endif
1068 
1069 #if KMP_ARCH_X86 || KMP_ARCH_X86_64
1070 #if KMP_MIC
1071 // fence-style instructions do not exist, but lock; xaddl $0,(%rsp) can be used.
1072 // We shouldn't need it, though, since the ABI rules require that
1073 // * If the compiler generates NGO stores it also generates the fence
1074 // * If users hand-code NGO stores they should insert the fence
1075 // therefore no incomplete unordered stores should be visible.
1076 #define KMP_MFENCE() /* Nothing */
1077 #define KMP_SFENCE() /* Nothing */
1078 #else
1079 #if KMP_COMPILER_ICC || KMP_COMPILER_ICX
1080 #define KMP_MFENCE_() _mm_mfence()
1081 #define KMP_SFENCE_() _mm_sfence()
1082 #elif KMP_COMPILER_MSVC
1083 #define KMP_MFENCE_() MemoryBarrier()
1084 #define KMP_SFENCE_() MemoryBarrier()
1085 #else
1086 #define KMP_MFENCE_() __sync_synchronize()
1087 #define KMP_SFENCE_() __sync_synchronize()
1088 #endif
1089 #define KMP_MFENCE() \
1090  if (UNLIKELY(!__kmp_cpuinfo.initialized)) { \
1091  __kmp_query_cpuid(&__kmp_cpuinfo); \
1092  } \
1093  if (__kmp_cpuinfo.flags.sse2) { \
1094  KMP_MFENCE_(); \
1095  }
1096 #define KMP_SFENCE() KMP_SFENCE_()
1097 #endif
1098 #else
1099 #define KMP_MFENCE() KMP_MB()
1100 #define KMP_SFENCE() KMP_MB()
1101 #endif
1102 
1103 #ifndef KMP_IMB
1104 #define KMP_IMB() /* nothing to do */
1105 #endif
1106 
1107 #ifndef KMP_ST_REL32
1108 #define KMP_ST_REL32(A, D) (*(A) = (D))
1109 #endif
1110 
1111 #ifndef KMP_ST_REL64
1112 #define KMP_ST_REL64(A, D) (*(A) = (D))
1113 #endif
1114 
1115 #ifndef KMP_LD_ACQ32
1116 #define KMP_LD_ACQ32(A) (*(A))
1117 #endif
1118 
1119 #ifndef KMP_LD_ACQ64
1120 #define KMP_LD_ACQ64(A) (*(A))
1121 #endif
1122 
1123 /* ------------------------------------------------------------------------ */
1124 // FIXME - maybe this should this be
1125 //
1126 // #define TCR_4(a) (*(volatile kmp_int32 *)(&a))
1127 // #define TCW_4(a,b) (a) = (*(volatile kmp_int32 *)&(b))
1128 //
1129 // #define TCR_8(a) (*(volatile kmp_int64 *)(a))
1130 // #define TCW_8(a,b) (a) = (*(volatile kmp_int64 *)(&b))
1131 //
1132 // I'm fairly certain this is the correct thing to do, but I'm afraid
1133 // of performance regressions.
1134 
1135 #define TCR_1(a) (a)
1136 #define TCW_1(a, b) (a) = (b)
1137 #define TCR_4(a) (a)
1138 #define TCW_4(a, b) (a) = (b)
1139 #define TCI_4(a) (++(a))
1140 #define TCD_4(a) (--(a))
1141 #define TCR_8(a) (a)
1142 #define TCW_8(a, b) (a) = (b)
1143 #define TCI_8(a) (++(a))
1144 #define TCD_8(a) (--(a))
1145 #define TCR_SYNC_4(a) (a)
1146 #define TCW_SYNC_4(a, b) (a) = (b)
1147 #define TCX_SYNC_4(a, b, c) \
1148  KMP_COMPARE_AND_STORE_REL32((volatile kmp_int32 *)(volatile void *)&(a), \
1149  (kmp_int32)(b), (kmp_int32)(c))
1150 #define TCR_SYNC_8(a) (a)
1151 #define TCW_SYNC_8(a, b) (a) = (b)
1152 #define TCX_SYNC_8(a, b, c) \
1153  KMP_COMPARE_AND_STORE_REL64((volatile kmp_int64 *)(volatile void *)&(a), \
1154  (kmp_int64)(b), (kmp_int64)(c))
1155 
1156 #if KMP_ARCH_X86 || KMP_ARCH_MIPS || KMP_ARCH_WASM || KMP_ARCH_PPC
1157 // What about ARM?
1158 #define TCR_PTR(a) ((void *)TCR_4(a))
1159 #define TCW_PTR(a, b) TCW_4((a), (b))
1160 #define TCR_SYNC_PTR(a) ((void *)TCR_SYNC_4(a))
1161 #define TCW_SYNC_PTR(a, b) TCW_SYNC_4((a), (b))
1162 #define TCX_SYNC_PTR(a, b, c) ((void *)TCX_SYNC_4((a), (b), (c)))
1163 
1164 #else /* 64 bit pointers */
1165 
1166 #define TCR_PTR(a) ((void *)TCR_8(a))
1167 #define TCW_PTR(a, b) TCW_8((a), (b))
1168 #define TCR_SYNC_PTR(a) ((void *)TCR_SYNC_8(a))
1169 #define TCW_SYNC_PTR(a, b) TCW_SYNC_8((a), (b))
1170 #define TCX_SYNC_PTR(a, b, c) ((void *)TCX_SYNC_8((a), (b), (c)))
1171 
1172 #endif /* KMP_ARCH_X86 */
1173 
1174 /* If these FTN_{TRUE,FALSE} values change, may need to change several places
1175  where they are used to check that language is Fortran, not C. */
1176 
1177 #ifndef FTN_TRUE
1178 #define FTN_TRUE TRUE
1179 #endif
1180 
1181 #ifndef FTN_FALSE
1182 #define FTN_FALSE FALSE
1183 #endif
1184 
1185 typedef void (*microtask_t)(int *gtid, int *npr, ...);
1186 
1187 #ifdef USE_VOLATILE_CAST
1188 #define VOLATILE_CAST(x) (volatile x)
1189 #else
1190 #define VOLATILE_CAST(x) (x)
1191 #endif
1192 
1193 #define KMP_WAIT __kmp_wait_4
1194 #define KMP_WAIT_PTR __kmp_wait_4_ptr
1195 #define KMP_EQ __kmp_eq_4
1196 #define KMP_NEQ __kmp_neq_4
1197 #define KMP_LT __kmp_lt_4
1198 #define KMP_GE __kmp_ge_4
1199 #define KMP_LE __kmp_le_4
1200 
1201 /* Workaround for Intel(R) 64 code gen bug when taking address of static array
1202  * (Intel(R) 64 Tracker #138) */
1203 #if (KMP_ARCH_X86_64 || KMP_ARCH_PPC64) && KMP_OS_LINUX
1204 #define STATIC_EFI2_WORKAROUND
1205 #else
1206 #define STATIC_EFI2_WORKAROUND static
1207 #endif
1208 
1209 // Support of BGET usage
1210 #ifndef KMP_USE_BGET
1211 #define KMP_USE_BGET 1
1212 #endif
1213 
1214 // Switches for OSS builds
1215 #ifndef USE_CMPXCHG_FIX
1216 #define USE_CMPXCHG_FIX 1
1217 #endif
1218 
1219 // Enable dynamic user lock
1220 #define KMP_USE_DYNAMIC_LOCK 1
1221 
1222 // Enable Intel(R) Transactional Synchronization Extensions (Intel(R) TSX) if
1223 // dynamic user lock is turned on
1224 #if KMP_USE_DYNAMIC_LOCK
1225 // Visual studio can't handle the asm sections in this code
1226 #define KMP_USE_TSX (KMP_ARCH_X86 || KMP_ARCH_X86_64) && !KMP_COMPILER_MSVC
1227 #ifdef KMP_USE_ADAPTIVE_LOCKS
1228 #undef KMP_USE_ADAPTIVE_LOCKS
1229 #endif
1230 #define KMP_USE_ADAPTIVE_LOCKS KMP_USE_TSX
1231 #endif
1232 
1233 // Enable tick time conversion of ticks to seconds
1234 #if KMP_STATS_ENABLED
1235 #define KMP_HAVE_TICK_TIME \
1236  (KMP_OS_LINUX && (KMP_MIC || KMP_ARCH_X86 || KMP_ARCH_X86_64))
1237 #endif
1238 
1239 // Warning levels
1240 enum kmp_warnings_level {
1241  kmp_warnings_off = 0, /* No warnings */
1242  kmp_warnings_low, /* Minimal warnings (default) */
1243  kmp_warnings_explicit = 6, /* Explicitly set to ON - more warnings */
1244  kmp_warnings_verbose /* reserved */
1245 };
1246 
1247 #ifdef __cplusplus
1248 } // extern "C"
1249 #endif // __cplusplus
1250 
1251 // Safe C API
1252 #include "kmp_safe_c_api.h"
1253 
1254 // Macros for C++11 atomic functions
1255 #define KMP_ATOMIC_LD(p, order) (p)->load(std::memory_order_##order)
1256 #define KMP_ATOMIC_OP(op, p, v, order) (p)->op(v, std::memory_order_##order)
1257 
1258 // For non-default load/store
1259 #define KMP_ATOMIC_LD_ACQ(p) KMP_ATOMIC_LD(p, acquire)
1260 #define KMP_ATOMIC_LD_RLX(p) KMP_ATOMIC_LD(p, relaxed)
1261 #define KMP_ATOMIC_ST_REL(p, v) KMP_ATOMIC_OP(store, p, v, release)
1262 #define KMP_ATOMIC_ST_RLX(p, v) KMP_ATOMIC_OP(store, p, v, relaxed)
1263 
1264 // For non-default fetch_<op>
1265 #define KMP_ATOMIC_ADD(p, v) KMP_ATOMIC_OP(fetch_add, p, v, acq_rel)
1266 #define KMP_ATOMIC_SUB(p, v) KMP_ATOMIC_OP(fetch_sub, p, v, acq_rel)
1267 #define KMP_ATOMIC_AND(p, v) KMP_ATOMIC_OP(fetch_and, p, v, acq_rel)
1268 #define KMP_ATOMIC_OR(p, v) KMP_ATOMIC_OP(fetch_or, p, v, acq_rel)
1269 #define KMP_ATOMIC_INC(p) KMP_ATOMIC_OP(fetch_add, p, 1, acq_rel)
1270 #define KMP_ATOMIC_DEC(p) KMP_ATOMIC_OP(fetch_sub, p, 1, acq_rel)
1271 #define KMP_ATOMIC_ADD_RLX(p, v) KMP_ATOMIC_OP(fetch_add, p, v, relaxed)
1272 #define KMP_ATOMIC_INC_RLX(p) KMP_ATOMIC_OP(fetch_add, p, 1, relaxed)
1273 
1274 // Callers of the following functions cannot see the side effect on "expected".
1275 template <typename T>
1276 bool __kmp_atomic_compare_store(std::atomic<T> *p, T expected, T desired) {
1277  return p->compare_exchange_strong(
1278  expected, desired, std::memory_order_acq_rel, std::memory_order_relaxed);
1279 }
1280 
1281 template <typename T>
1282 bool __kmp_atomic_compare_store_acq(std::atomic<T> *p, T expected, T desired) {
1283  return p->compare_exchange_strong(
1284  expected, desired, std::memory_order_acquire, std::memory_order_relaxed);
1285 }
1286 
1287 template <typename T>
1288 bool __kmp_atomic_compare_store_rel(std::atomic<T> *p, T expected, T desired) {
1289  return p->compare_exchange_strong(
1290  expected, desired, std::memory_order_release, std::memory_order_relaxed);
1291 }
1292 
1293 // Symbol lookup on Linux/Windows
1294 #if KMP_OS_WINDOWS
1295 extern void *__kmp_lookup_symbol(const char *name, bool next = false);
1296 #define KMP_DLSYM(name) __kmp_lookup_symbol(name)
1297 #define KMP_DLSYM_NEXT(name) __kmp_lookup_symbol(name, true)
1298 #elif KMP_OS_WASI || KMP_OS_EMSCRIPTEN
1299 #define KMP_DLSYM(name) nullptr
1300 #define KMP_DLSYM_NEXT(name) nullptr
1301 #else
1302 #define KMP_DLSYM(name) dlsym(RTLD_DEFAULT, name)
1303 #define KMP_DLSYM_NEXT(name) dlsym(RTLD_NEXT, name)
1304 #endif
1305 
1306 // MSVC doesn't have this, but clang/clang-cl does.
1307 #ifndef __has_builtin
1308 #define __has_builtin(x) 0
1309 #endif
1310 
1311 // Same as LLVM_BUILTIN_UNREACHABLE. States that it is UB to reach this point.
1312 #if __has_builtin(__builtin_unreachable) || defined(__GNUC__)
1313 #define KMP_BUILTIN_UNREACHABLE __builtin_unreachable()
1314 #elif defined(_MSC_VER)
1315 #define KMP_BUILTIN_UNREACHABLE __assume(false)
1316 #else
1317 #define KMP_BUILTIN_UNREACHABLE
1318 #endif
1319 
1320 #endif /* KMP_OS_H */