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 || KMP_ARCH_ARM64EC
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 || KMP_ARCH_ARM64EC
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 && \
468  !((KMP_ARCH_AARCH64 || KMP_ARCH_ARM || KMP_ARCH_ARM64EC) && \
469  (KMP_COMPILER_CLANG || KMP_COMPILER_GCC))
470 
471 #if KMP_MSVC_COMPAT && !KMP_COMPILER_CLANG
472 #pragma intrinsic(InterlockedExchangeAdd)
473 #pragma intrinsic(InterlockedCompareExchange)
474 #pragma intrinsic(InterlockedExchange)
475 #if !KMP_32_BIT_ARCH
476 #pragma intrinsic(InterlockedExchange64)
477 #endif
478 #endif
479 
480 // Using InterlockedIncrement / InterlockedDecrement causes a library loading
481 // ordering problem, so we use InterlockedExchangeAdd instead.
482 #define KMP_TEST_THEN_INC32(p) InterlockedExchangeAdd((volatile long *)(p), 1)
483 #define KMP_TEST_THEN_INC_ACQ32(p) \
484  InterlockedExchangeAdd((volatile long *)(p), 1)
485 #define KMP_TEST_THEN_ADD4_32(p) InterlockedExchangeAdd((volatile long *)(p), 4)
486 #define KMP_TEST_THEN_ADD4_ACQ32(p) \
487  InterlockedExchangeAdd((volatile long *)(p), 4)
488 #define KMP_TEST_THEN_DEC32(p) InterlockedExchangeAdd((volatile long *)(p), -1)
489 #define KMP_TEST_THEN_DEC_ACQ32(p) \
490  InterlockedExchangeAdd((volatile long *)(p), -1)
491 #define KMP_TEST_THEN_ADD32(p, v) \
492  InterlockedExchangeAdd((volatile long *)(p), (v))
493 
494 #define KMP_COMPARE_AND_STORE_RET32(p, cv, sv) \
495  InterlockedCompareExchange((volatile long *)(p), (long)(sv), (long)(cv))
496 
497 #define KMP_XCHG_FIXED32(p, v) \
498  InterlockedExchange((volatile long *)(p), (long)(v))
499 #define KMP_XCHG_FIXED64(p, v) \
500  InterlockedExchange64((volatile kmp_int64 *)(p), (kmp_int64)(v))
501 
502 inline kmp_real32 KMP_XCHG_REAL32(volatile kmp_real32 *p, kmp_real32 v) {
503  kmp_int32 tmp = InterlockedExchange((volatile long *)p, *(long *)&v);
504  return *(kmp_real32 *)&tmp;
505 }
506 
507 #define KMP_TEST_THEN_OR8(p, v) __kmp_test_then_or8((p), (v))
508 #define KMP_TEST_THEN_AND8(p, v) __kmp_test_then_and8((p), (v))
509 #define KMP_TEST_THEN_OR32(p, v) __kmp_test_then_or32((p), (v))
510 #define KMP_TEST_THEN_AND32(p, v) __kmp_test_then_and32((p), (v))
511 #define KMP_TEST_THEN_OR64(p, v) __kmp_test_then_or64((p), (v))
512 #define KMP_TEST_THEN_AND64(p, v) __kmp_test_then_and64((p), (v))
513 
514 extern kmp_int8 __kmp_test_then_or8(volatile kmp_int8 *p, kmp_int8 v);
515 extern kmp_int8 __kmp_test_then_and8(volatile kmp_int8 *p, kmp_int8 v);
516 extern kmp_int32 __kmp_test_then_add32(volatile kmp_int32 *p, kmp_int32 v);
517 extern kmp_uint32 __kmp_test_then_or32(volatile kmp_uint32 *p, kmp_uint32 v);
518 extern kmp_uint32 __kmp_test_then_and32(volatile kmp_uint32 *p, kmp_uint32 v);
519 extern kmp_int64 __kmp_test_then_add64(volatile kmp_int64 *p, kmp_int64 v);
520 extern kmp_uint64 __kmp_test_then_or64(volatile kmp_uint64 *p, kmp_uint64 v);
521 extern kmp_uint64 __kmp_test_then_and64(volatile kmp_uint64 *p, kmp_uint64 v);
522 
523 #if KMP_ARCH_AARCH64 && KMP_COMPILER_MSVC && !KMP_COMPILER_CLANG
524 #define KMP_TEST_THEN_INC64(p) _InterlockedExchangeAdd64((p), 1LL)
525 #define KMP_TEST_THEN_INC_ACQ64(p) _InterlockedExchangeAdd64_acq((p), 1LL)
526 #define KMP_TEST_THEN_ADD4_64(p) _InterlockedExchangeAdd64((p), 4LL)
527 // #define KMP_TEST_THEN_ADD4_ACQ64(p) _InterlockedExchangeAdd64_acq((p), 4LL)
528 // #define KMP_TEST_THEN_DEC64(p) _InterlockedExchangeAdd64((p), -1LL)
529 // #define KMP_TEST_THEN_DEC_ACQ64(p) _InterlockedExchangeAdd64_acq((p), -1LL)
530 // #define KMP_TEST_THEN_ADD8(p, v) _InterlockedExchangeAdd8((p), (v))
531 #define KMP_TEST_THEN_ADD64(p, v) _InterlockedExchangeAdd64((p), (v))
532 
533 #define KMP_COMPARE_AND_STORE_ACQ8(p, cv, sv) \
534  __kmp_compare_and_store_acq8((p), (cv), (sv))
535 #define KMP_COMPARE_AND_STORE_REL8(p, cv, sv) \
536  __kmp_compare_and_store_rel8((p), (cv), (sv))
537 #define KMP_COMPARE_AND_STORE_ACQ16(p, cv, sv) \
538  __kmp_compare_and_store_acq16((p), (cv), (sv))
539 /*
540 #define KMP_COMPARE_AND_STORE_REL16(p, cv, sv) \
541  __kmp_compare_and_store_rel16((p), (cv), (sv))
542 */
543 #define KMP_COMPARE_AND_STORE_ACQ32(p, cv, sv) \
544  __kmp_compare_and_store_acq32((volatile kmp_int32 *)(p), (kmp_int32)(cv), \
545  (kmp_int32)(sv))
546 #define KMP_COMPARE_AND_STORE_REL32(p, cv, sv) \
547  __kmp_compare_and_store_rel32((volatile kmp_int32 *)(p), (kmp_int32)(cv), \
548  (kmp_int32)(sv))
549 #define KMP_COMPARE_AND_STORE_ACQ64(p, cv, sv) \
550  __kmp_compare_and_store_acq64((volatile kmp_int64 *)(p), (kmp_int64)(cv), \
551  (kmp_int64)(sv))
552 #define KMP_COMPARE_AND_STORE_REL64(p, cv, sv) \
553  __kmp_compare_and_store_rel64((volatile kmp_int64 *)(p), (kmp_int64)(cv), \
554  (kmp_int64)(sv))
555 #define KMP_COMPARE_AND_STORE_PTR(p, cv, sv) \
556  __kmp_compare_and_store_ptr((void *volatile *)(p), (void *)(cv), (void *)(sv))
557 
558 // KMP_COMPARE_AND_STORE expects this order: pointer, compare, exchange
559 // _InterlockedCompareExchange expects this order: pointer, exchange, compare
560 // KMP_COMPARE_AND_STORE also returns a bool indicating a successful write. A
561 // write is successful if the return value of _InterlockedCompareExchange is the
562 // same as the compare value.
563 inline kmp_int8 __kmp_compare_and_store_acq8(volatile kmp_int8 *p, kmp_int8 cv,
564  kmp_int8 sv) {
565  return _InterlockedCompareExchange8_acq(p, sv, cv) == cv;
566 }
567 
568 inline kmp_int8 __kmp_compare_and_store_rel8(volatile kmp_int8 *p, kmp_int8 cv,
569  kmp_int8 sv) {
570  return _InterlockedCompareExchange8_rel(p, sv, cv) == cv;
571 }
572 
573 inline kmp_int16 __kmp_compare_and_store_acq16(volatile kmp_int16 *p,
574  kmp_int16 cv, kmp_int16 sv) {
575  return _InterlockedCompareExchange16_acq(p, sv, cv) == cv;
576 }
577 
578 inline kmp_int16 __kmp_compare_and_store_rel16(volatile kmp_int16 *p,
579  kmp_int16 cv, kmp_int16 sv) {
580  return _InterlockedCompareExchange16_rel(p, sv, cv) == cv;
581 }
582 
583 inline kmp_int32 __kmp_compare_and_store_acq32(volatile kmp_int32 *p,
584  kmp_int32 cv, kmp_int32 sv) {
585  return _InterlockedCompareExchange_acq((volatile long *)p, sv, cv) == cv;
586 }
587 
588 inline kmp_int32 __kmp_compare_and_store_rel32(volatile kmp_int32 *p,
589  kmp_int32 cv, kmp_int32 sv) {
590  return _InterlockedCompareExchange_rel((volatile long *)p, sv, cv) == cv;
591 }
592 
593 inline kmp_int32 __kmp_compare_and_store_acq64(volatile kmp_int64 *p,
594  kmp_int64 cv, kmp_int64 sv) {
595  return _InterlockedCompareExchange64_acq(p, sv, cv) == cv;
596 }
597 
598 inline kmp_int32 __kmp_compare_and_store_rel64(volatile kmp_int64 *p,
599  kmp_int64 cv, kmp_int64 sv) {
600  return _InterlockedCompareExchange64_rel(p, sv, cv) == cv;
601 }
602 
603 inline kmp_int32 __kmp_compare_and_store_ptr(void *volatile *p, void *cv,
604  void *sv) {
605  return _InterlockedCompareExchangePointer(p, sv, cv) == cv;
606 }
607 
608 // The _RET versions return the value instead of a bool
609 
610 #define KMP_COMPARE_AND_STORE_RET8(p, cv, sv) \
611  _InterlockedCompareExchange8((p), (sv), (cv))
612 #define KMP_COMPARE_AND_STORE_RET16(p, cv, sv) \
613  _InterlockedCompareExchange16((p), (sv), (cv))
614 
615 #define KMP_COMPARE_AND_STORE_RET64(p, cv, sv) \
616  _InterlockedCompareExchange64((volatile kmp_int64 *)(p), (kmp_int64)(sv), \
617  (kmp_int64)(cv))
618 
619 
620 #define KMP_XCHG_FIXED8(p, v) \
621  _InterlockedExchange8((volatile kmp_int8 *)(p), (kmp_int8)(v));
622 #define KMP_XCHG_FIXED16(p, v) _InterlockedExchange16((p), (v));
623 #define KMP_XCHG_REAL64(p, v) __kmp_xchg_real64((p), (v));
624 
625 inline kmp_real64 __kmp_xchg_real64(volatile kmp_real64 *p, kmp_real64 v) {
626  kmp_int64 tmp = _InterlockedExchange64((volatile kmp_int64 *)p, *(kmp_int64
627  *)&v); return *(kmp_real64 *)&tmp;
628 }
629 
630 #else // !KMP_ARCH_AARCH64
631 
632 // Routines that we still need to implement in assembly.
633 extern kmp_int8 __kmp_test_then_add8(volatile kmp_int8 *p, kmp_int8 v);
634 
635 extern kmp_int8 __kmp_compare_and_store8(volatile kmp_int8 *p, kmp_int8 cv,
636  kmp_int8 sv);
637 extern kmp_int16 __kmp_compare_and_store16(volatile kmp_int16 *p, kmp_int16 cv,
638  kmp_int16 sv);
639 extern kmp_int32 __kmp_compare_and_store32(volatile kmp_int32 *p, kmp_int32 cv,
640  kmp_int32 sv);
641 extern kmp_int32 __kmp_compare_and_store64(volatile kmp_int64 *p, kmp_int64 cv,
642  kmp_int64 sv);
643 extern kmp_int8 __kmp_compare_and_store_ret8(volatile kmp_int8 *p, kmp_int8 cv,
644  kmp_int8 sv);
645 extern kmp_int16 __kmp_compare_and_store_ret16(volatile kmp_int16 *p,
646  kmp_int16 cv, kmp_int16 sv);
647 extern kmp_int32 __kmp_compare_and_store_ret32(volatile kmp_int32 *p,
648  kmp_int32 cv, kmp_int32 sv);
649 extern kmp_int64 __kmp_compare_and_store_ret64(volatile kmp_int64 *p,
650  kmp_int64 cv, kmp_int64 sv);
651 
652 extern kmp_int8 __kmp_xchg_fixed8(volatile kmp_int8 *p, kmp_int8 v);
653 extern kmp_int16 __kmp_xchg_fixed16(volatile kmp_int16 *p, kmp_int16 v);
654 extern kmp_int32 __kmp_xchg_fixed32(volatile kmp_int32 *p, kmp_int32 v);
655 extern kmp_int64 __kmp_xchg_fixed64(volatile kmp_int64 *p, kmp_int64 v);
656 extern kmp_real32 __kmp_xchg_real32(volatile kmp_real32 *p, kmp_real32 v);
657 extern kmp_real64 __kmp_xchg_real64(volatile kmp_real64 *p, kmp_real64 v);
658 
659 //#define KMP_TEST_THEN_INC32(p) __kmp_test_then_add32((p), 1)
660 //#define KMP_TEST_THEN_INC_ACQ32(p) __kmp_test_then_add32((p), 1)
661 #define KMP_TEST_THEN_INC64(p) __kmp_test_then_add64((p), 1LL)
662 #define KMP_TEST_THEN_INC_ACQ64(p) __kmp_test_then_add64((p), 1LL)
663 //#define KMP_TEST_THEN_ADD4_32(p) __kmp_test_then_add32((p), 4)
664 //#define KMP_TEST_THEN_ADD4_ACQ32(p) __kmp_test_then_add32((p), 4)
665 #define KMP_TEST_THEN_ADD4_64(p) __kmp_test_then_add64((p), 4LL)
666 #define KMP_TEST_THEN_ADD4_ACQ64(p) __kmp_test_then_add64((p), 4LL)
667 //#define KMP_TEST_THEN_DEC32(p) __kmp_test_then_add32((p), -1)
668 //#define KMP_TEST_THEN_DEC_ACQ32(p) __kmp_test_then_add32((p), -1)
669 #define KMP_TEST_THEN_DEC64(p) __kmp_test_then_add64((p), -1LL)
670 #define KMP_TEST_THEN_DEC_ACQ64(p) __kmp_test_then_add64((p), -1LL)
671 //#define KMP_TEST_THEN_ADD32(p, v) __kmp_test_then_add32((p), (v))
672 #define KMP_TEST_THEN_ADD8(p, v) __kmp_test_then_add8((p), (v))
673 #define KMP_TEST_THEN_ADD64(p, v) __kmp_test_then_add64((p), (v))
674 
675 
676 #define KMP_COMPARE_AND_STORE_ACQ8(p, cv, sv) \
677  __kmp_compare_and_store8((p), (cv), (sv))
678 #define KMP_COMPARE_AND_STORE_REL8(p, cv, sv) \
679  __kmp_compare_and_store8((p), (cv), (sv))
680 #define KMP_COMPARE_AND_STORE_ACQ16(p, cv, sv) \
681  __kmp_compare_and_store16((p), (cv), (sv))
682 #define KMP_COMPARE_AND_STORE_REL16(p, cv, sv) \
683  __kmp_compare_and_store16((p), (cv), (sv))
684 #define KMP_COMPARE_AND_STORE_ACQ32(p, cv, sv) \
685  __kmp_compare_and_store32((volatile kmp_int32 *)(p), (kmp_int32)(cv), \
686  (kmp_int32)(sv))
687 #define KMP_COMPARE_AND_STORE_REL32(p, cv, sv) \
688  __kmp_compare_and_store32((volatile kmp_int32 *)(p), (kmp_int32)(cv), \
689  (kmp_int32)(sv))
690 #define KMP_COMPARE_AND_STORE_ACQ64(p, cv, sv) \
691  __kmp_compare_and_store64((volatile kmp_int64 *)(p), (kmp_int64)(cv), \
692  (kmp_int64)(sv))
693 #define KMP_COMPARE_AND_STORE_REL64(p, cv, sv) \
694  __kmp_compare_and_store64((volatile kmp_int64 *)(p), (kmp_int64)(cv), \
695  (kmp_int64)(sv))
696 
697 #if KMP_ARCH_X86
698 #define KMP_COMPARE_AND_STORE_PTR(p, cv, sv) \
699  __kmp_compare_and_store32((volatile kmp_int32 *)(p), (kmp_int32)(cv), \
700  (kmp_int32)(sv))
701 #else /* 64 bit pointers */
702 #define KMP_COMPARE_AND_STORE_PTR(p, cv, sv) \
703  __kmp_compare_and_store64((volatile kmp_int64 *)(p), (kmp_int64)(cv), \
704  (kmp_int64)(sv))
705 #endif /* KMP_ARCH_X86 */
706 
707 #define KMP_COMPARE_AND_STORE_RET8(p, cv, sv) \
708  __kmp_compare_and_store_ret8((p), (cv), (sv))
709 #define KMP_COMPARE_AND_STORE_RET16(p, cv, sv) \
710  __kmp_compare_and_store_ret16((p), (cv), (sv))
711 #define KMP_COMPARE_AND_STORE_RET64(p, cv, sv) \
712  __kmp_compare_and_store_ret64((volatile kmp_int64 *)(p), (kmp_int64)(cv), \
713  (kmp_int64)(sv))
714 
715 #define KMP_XCHG_FIXED8(p, v) \
716  __kmp_xchg_fixed8((volatile kmp_int8 *)(p), (kmp_int8)(v));
717 #define KMP_XCHG_FIXED16(p, v) __kmp_xchg_fixed16((p), (v));
718 //#define KMP_XCHG_FIXED32(p, v) __kmp_xchg_fixed32((p), (v));
719 //#define KMP_XCHG_FIXED64(p, v) __kmp_xchg_fixed64((p), (v));
720 //#define KMP_XCHG_REAL32(p, v) __kmp_xchg_real32((p), (v));
721 #define KMP_XCHG_REAL64(p, v) __kmp_xchg_real64((p), (v));
722 #endif
723 
724 #elif (KMP_ASM_INTRINS && KMP_OS_UNIX) || !(KMP_ARCH_X86 || KMP_ARCH_X86_64)
725 
726 /* cast p to correct type so that proper intrinsic will be used */
727 #define KMP_TEST_THEN_INC32(p) \
728  __sync_fetch_and_add((volatile kmp_int32 *)(p), 1)
729 #define KMP_TEST_THEN_INC_ACQ32(p) \
730  __sync_fetch_and_add((volatile kmp_int32 *)(p), 1)
731 #if KMP_ARCH_MIPS
732 #define KMP_TEST_THEN_INC64(p) \
733  __atomic_fetch_add((volatile kmp_int64 *)(p), 1LL, __ATOMIC_SEQ_CST)
734 #define KMP_TEST_THEN_INC_ACQ64(p) \
735  __atomic_fetch_add((volatile kmp_int64 *)(p), 1LL, __ATOMIC_SEQ_CST)
736 #else
737 #define KMP_TEST_THEN_INC64(p) \
738  __sync_fetch_and_add((volatile kmp_int64 *)(p), 1LL)
739 #define KMP_TEST_THEN_INC_ACQ64(p) \
740  __sync_fetch_and_add((volatile kmp_int64 *)(p), 1LL)
741 #endif
742 #define KMP_TEST_THEN_ADD4_32(p) \
743  __sync_fetch_and_add((volatile kmp_int32 *)(p), 4)
744 #define KMP_TEST_THEN_ADD4_ACQ32(p) \
745  __sync_fetch_and_add((volatile kmp_int32 *)(p), 4)
746 #if KMP_ARCH_MIPS
747 #define KMP_TEST_THEN_ADD4_64(p) \
748  __atomic_fetch_add((volatile kmp_int64 *)(p), 4LL, __ATOMIC_SEQ_CST)
749 #define KMP_TEST_THEN_ADD4_ACQ64(p) \
750  __atomic_fetch_add((volatile kmp_int64 *)(p), 4LL, __ATOMIC_SEQ_CST)
751 #define KMP_TEST_THEN_DEC64(p) \
752  __atomic_fetch_sub((volatile kmp_int64 *)(p), 1LL, __ATOMIC_SEQ_CST)
753 #define KMP_TEST_THEN_DEC_ACQ64(p) \
754  __atomic_fetch_sub((volatile kmp_int64 *)(p), 1LL, __ATOMIC_SEQ_CST)
755 #else
756 #define KMP_TEST_THEN_ADD4_64(p) \
757  __sync_fetch_and_add((volatile kmp_int64 *)(p), 4LL)
758 #define KMP_TEST_THEN_ADD4_ACQ64(p) \
759  __sync_fetch_and_add((volatile kmp_int64 *)(p), 4LL)
760 #define KMP_TEST_THEN_DEC64(p) \
761  __sync_fetch_and_sub((volatile kmp_int64 *)(p), 1LL)
762 #define KMP_TEST_THEN_DEC_ACQ64(p) \
763  __sync_fetch_and_sub((volatile kmp_int64 *)(p), 1LL)
764 #endif
765 #define KMP_TEST_THEN_DEC32(p) \
766  __sync_fetch_and_sub((volatile kmp_int32 *)(p), 1)
767 #define KMP_TEST_THEN_DEC_ACQ32(p) \
768  __sync_fetch_and_sub((volatile kmp_int32 *)(p), 1)
769 #define KMP_TEST_THEN_ADD8(p, v) \
770  __sync_fetch_and_add((volatile kmp_int8 *)(p), (kmp_int8)(v))
771 #define KMP_TEST_THEN_ADD32(p, v) \
772  __sync_fetch_and_add((volatile kmp_int32 *)(p), (kmp_int32)(v))
773 #if KMP_ARCH_MIPS
774 #define KMP_TEST_THEN_ADD64(p, v) \
775  __atomic_fetch_add((volatile kmp_uint64 *)(p), (kmp_uint64)(v), \
776  __ATOMIC_SEQ_CST)
777 #else
778 #define KMP_TEST_THEN_ADD64(p, v) \
779  __sync_fetch_and_add((volatile kmp_int64 *)(p), (kmp_int64)(v))
780 #endif
781 
782 #define KMP_TEST_THEN_OR8(p, v) \
783  __sync_fetch_and_or((volatile kmp_int8 *)(p), (kmp_int8)(v))
784 #define KMP_TEST_THEN_AND8(p, v) \
785  __sync_fetch_and_and((volatile kmp_int8 *)(p), (kmp_int8)(v))
786 #define KMP_TEST_THEN_OR32(p, v) \
787  __sync_fetch_and_or((volatile kmp_uint32 *)(p), (kmp_uint32)(v))
788 #define KMP_TEST_THEN_AND32(p, v) \
789  __sync_fetch_and_and((volatile kmp_uint32 *)(p), (kmp_uint32)(v))
790 #if KMP_ARCH_MIPS
791 #define KMP_TEST_THEN_OR64(p, v) \
792  __atomic_fetch_or((volatile kmp_uint64 *)(p), (kmp_uint64)(v), \
793  __ATOMIC_SEQ_CST)
794 #define KMP_TEST_THEN_AND64(p, v) \
795  __atomic_fetch_and((volatile kmp_uint64 *)(p), (kmp_uint64)(v), \
796  __ATOMIC_SEQ_CST)
797 #else
798 #define KMP_TEST_THEN_OR64(p, v) \
799  __sync_fetch_and_or((volatile kmp_uint64 *)(p), (kmp_uint64)(v))
800 #define KMP_TEST_THEN_AND64(p, v) \
801  __sync_fetch_and_and((volatile kmp_uint64 *)(p), (kmp_uint64)(v))
802 #endif
803 
804 #define KMP_COMPARE_AND_STORE_ACQ8(p, cv, sv) \
805  __sync_bool_compare_and_swap((volatile kmp_uint8 *)(p), (kmp_uint8)(cv), \
806  (kmp_uint8)(sv))
807 #define KMP_COMPARE_AND_STORE_REL8(p, cv, sv) \
808  __sync_bool_compare_and_swap((volatile kmp_uint8 *)(p), (kmp_uint8)(cv), \
809  (kmp_uint8)(sv))
810 #define KMP_COMPARE_AND_STORE_ACQ16(p, cv, sv) \
811  __sync_bool_compare_and_swap((volatile kmp_uint16 *)(p), (kmp_uint16)(cv), \
812  (kmp_uint16)(sv))
813 #define KMP_COMPARE_AND_STORE_REL16(p, cv, sv) \
814  __sync_bool_compare_and_swap((volatile kmp_uint16 *)(p), (kmp_uint16)(cv), \
815  (kmp_uint16)(sv))
816 #define KMP_COMPARE_AND_STORE_ACQ32(p, cv, sv) \
817  __sync_bool_compare_and_swap((volatile kmp_uint32 *)(p), (kmp_uint32)(cv), \
818  (kmp_uint32)(sv))
819 #define KMP_COMPARE_AND_STORE_REL32(p, cv, sv) \
820  __sync_bool_compare_and_swap((volatile kmp_uint32 *)(p), (kmp_uint32)(cv), \
821  (kmp_uint32)(sv))
822 #define KMP_COMPARE_AND_STORE_PTR(p, cv, sv) \
823  __sync_bool_compare_and_swap((void *volatile *)(p), (void *)(cv), \
824  (void *)(sv))
825 
826 #define KMP_COMPARE_AND_STORE_RET8(p, cv, sv) \
827  __sync_val_compare_and_swap((volatile kmp_uint8 *)(p), (kmp_uint8)(cv), \
828  (kmp_uint8)(sv))
829 #define KMP_COMPARE_AND_STORE_RET16(p, cv, sv) \
830  __sync_val_compare_and_swap((volatile kmp_uint16 *)(p), (kmp_uint16)(cv), \
831  (kmp_uint16)(sv))
832 #define KMP_COMPARE_AND_STORE_RET32(p, cv, sv) \
833  __sync_val_compare_and_swap((volatile kmp_uint32 *)(p), (kmp_uint32)(cv), \
834  (kmp_uint32)(sv))
835 #if KMP_ARCH_MIPS
836 static inline bool mips_sync_bool_compare_and_swap(volatile kmp_uint64 *p,
837  kmp_uint64 cv,
838  kmp_uint64 sv) {
839  return __atomic_compare_exchange(p, &cv, &sv, false, __ATOMIC_SEQ_CST,
840  __ATOMIC_SEQ_CST);
841 }
842 static inline bool mips_sync_val_compare_and_swap(volatile kmp_uint64 *p,
843  kmp_uint64 cv,
844  kmp_uint64 sv) {
845  __atomic_compare_exchange(p, &cv, &sv, false, __ATOMIC_SEQ_CST,
846  __ATOMIC_SEQ_CST);
847  return cv;
848 }
849 #define KMP_COMPARE_AND_STORE_ACQ64(p, cv, sv) \
850  mips_sync_bool_compare_and_swap((volatile kmp_uint64 *)(p), \
851  (kmp_uint64)(cv), (kmp_uint64)(sv))
852 #define KMP_COMPARE_AND_STORE_REL64(p, cv, sv) \
853  mips_sync_bool_compare_and_swap((volatile kmp_uint64 *)(p), \
854  (kmp_uint64)(cv), (kmp_uint64)(sv))
855 #define KMP_COMPARE_AND_STORE_RET64(p, cv, sv) \
856  mips_sync_val_compare_and_swap((volatile kmp_uint64 *)(p), (kmp_uint64)(cv), \
857  (kmp_uint64)(sv))
858 #else
859 #define KMP_COMPARE_AND_STORE_ACQ64(p, cv, sv) \
860  __sync_bool_compare_and_swap((volatile kmp_uint64 *)(p), (kmp_uint64)(cv), \
861  (kmp_uint64)(sv))
862 #define KMP_COMPARE_AND_STORE_REL64(p, cv, sv) \
863  __sync_bool_compare_and_swap((volatile kmp_uint64 *)(p), (kmp_uint64)(cv), \
864  (kmp_uint64)(sv))
865 #define KMP_COMPARE_AND_STORE_RET64(p, cv, sv) \
866  __sync_val_compare_and_swap((volatile kmp_uint64 *)(p), (kmp_uint64)(cv), \
867  (kmp_uint64)(sv))
868 #endif
869 
870 #if KMP_OS_DARWIN && defined(__INTEL_COMPILER) && __INTEL_COMPILER >= 1800
871 #define KMP_XCHG_FIXED8(p, v) \
872  __atomic_exchange_1((volatile kmp_uint8 *)(p), (kmp_uint8)(v), \
873  __ATOMIC_SEQ_CST)
874 #else
875 #define KMP_XCHG_FIXED8(p, v) \
876  __sync_lock_test_and_set((volatile kmp_uint8 *)(p), (kmp_uint8)(v))
877 #endif
878 #define KMP_XCHG_FIXED16(p, v) \
879  __sync_lock_test_and_set((volatile kmp_uint16 *)(p), (kmp_uint16)(v))
880 #define KMP_XCHG_FIXED32(p, v) \
881  __sync_lock_test_and_set((volatile kmp_uint32 *)(p), (kmp_uint32)(v))
882 #define KMP_XCHG_FIXED64(p, v) \
883  __sync_lock_test_and_set((volatile kmp_uint64 *)(p), (kmp_uint64)(v))
884 
885 inline kmp_real32 KMP_XCHG_REAL32(volatile kmp_real32 *p, kmp_real32 v) {
886  volatile kmp_uint32 *up;
887  kmp_uint32 uv;
888  memcpy(&up, &p, sizeof(up));
889  memcpy(&uv, &v, sizeof(uv));
890  kmp_int32 tmp = __sync_lock_test_and_set(up, uv);
891  kmp_real32 ftmp;
892  memcpy(&ftmp, &tmp, sizeof(tmp));
893  return ftmp;
894 }
895 
896 inline kmp_real64 KMP_XCHG_REAL64(volatile kmp_real64 *p, kmp_real64 v) {
897  volatile kmp_uint64 *up;
898  kmp_uint64 uv;
899  memcpy(&up, &p, sizeof(up));
900  memcpy(&uv, &v, sizeof(uv));
901  kmp_int64 tmp = __sync_lock_test_and_set(up, uv);
902  kmp_real64 dtmp;
903  memcpy(&dtmp, &tmp, sizeof(tmp));
904  return dtmp;
905 }
906 
907 #else
908 
909 extern kmp_int8 __kmp_test_then_add8(volatile kmp_int8 *p, kmp_int8 v);
910 extern kmp_int8 __kmp_test_then_or8(volatile kmp_int8 *p, kmp_int8 v);
911 extern kmp_int8 __kmp_test_then_and8(volatile kmp_int8 *p, kmp_int8 v);
912 extern kmp_int32 __kmp_test_then_add32(volatile kmp_int32 *p, kmp_int32 v);
913 extern kmp_uint32 __kmp_test_then_or32(volatile kmp_uint32 *p, kmp_uint32 v);
914 extern kmp_uint32 __kmp_test_then_and32(volatile kmp_uint32 *p, kmp_uint32 v);
915 extern kmp_int64 __kmp_test_then_add64(volatile kmp_int64 *p, kmp_int64 v);
916 extern kmp_uint64 __kmp_test_then_or64(volatile kmp_uint64 *p, kmp_uint64 v);
917 extern kmp_uint64 __kmp_test_then_and64(volatile kmp_uint64 *p, kmp_uint64 v);
918 
919 extern kmp_int8 __kmp_compare_and_store8(volatile kmp_int8 *p, kmp_int8 cv,
920  kmp_int8 sv);
921 extern kmp_int16 __kmp_compare_and_store16(volatile kmp_int16 *p, kmp_int16 cv,
922  kmp_int16 sv);
923 extern kmp_int32 __kmp_compare_and_store32(volatile kmp_int32 *p, kmp_int32 cv,
924  kmp_int32 sv);
925 extern kmp_int32 __kmp_compare_and_store64(volatile kmp_int64 *p, kmp_int64 cv,
926  kmp_int64 sv);
927 extern kmp_int8 __kmp_compare_and_store_ret8(volatile kmp_int8 *p, kmp_int8 cv,
928  kmp_int8 sv);
929 extern kmp_int16 __kmp_compare_and_store_ret16(volatile kmp_int16 *p,
930  kmp_int16 cv, kmp_int16 sv);
931 extern kmp_int32 __kmp_compare_and_store_ret32(volatile kmp_int32 *p,
932  kmp_int32 cv, kmp_int32 sv);
933 extern kmp_int64 __kmp_compare_and_store_ret64(volatile kmp_int64 *p,
934  kmp_int64 cv, kmp_int64 sv);
935 
936 extern kmp_int8 __kmp_xchg_fixed8(volatile kmp_int8 *p, kmp_int8 v);
937 extern kmp_int16 __kmp_xchg_fixed16(volatile kmp_int16 *p, kmp_int16 v);
938 extern kmp_int32 __kmp_xchg_fixed32(volatile kmp_int32 *p, kmp_int32 v);
939 extern kmp_int64 __kmp_xchg_fixed64(volatile kmp_int64 *p, kmp_int64 v);
940 extern kmp_real32 __kmp_xchg_real32(volatile kmp_real32 *p, kmp_real32 v);
941 extern kmp_real64 __kmp_xchg_real64(volatile kmp_real64 *p, kmp_real64 v);
942 
943 #define KMP_TEST_THEN_INC32(p) \
944  __kmp_test_then_add32((volatile kmp_int32 *)(p), 1)
945 #define KMP_TEST_THEN_INC_ACQ32(p) \
946  __kmp_test_then_add32((volatile kmp_int32 *)(p), 1)
947 #define KMP_TEST_THEN_INC64(p) \
948  __kmp_test_then_add64((volatile kmp_int64 *)(p), 1LL)
949 #define KMP_TEST_THEN_INC_ACQ64(p) \
950  __kmp_test_then_add64((volatile kmp_int64 *)(p), 1LL)
951 #define KMP_TEST_THEN_ADD4_32(p) \
952  __kmp_test_then_add32((volatile kmp_int32 *)(p), 4)
953 #define KMP_TEST_THEN_ADD4_ACQ32(p) \
954  __kmp_test_then_add32((volatile kmp_int32 *)(p), 4)
955 #define KMP_TEST_THEN_ADD4_64(p) \
956  __kmp_test_then_add64((volatile kmp_int64 *)(p), 4LL)
957 #define KMP_TEST_THEN_ADD4_ACQ64(p) \
958  __kmp_test_then_add64((volatile kmp_int64 *)(p), 4LL)
959 #define KMP_TEST_THEN_DEC32(p) \
960  __kmp_test_then_add32((volatile kmp_int32 *)(p), -1)
961 #define KMP_TEST_THEN_DEC_ACQ32(p) \
962  __kmp_test_then_add32((volatile kmp_int32 *)(p), -1)
963 #define KMP_TEST_THEN_DEC64(p) \
964  __kmp_test_then_add64((volatile kmp_int64 *)(p), -1LL)
965 #define KMP_TEST_THEN_DEC_ACQ64(p) \
966  __kmp_test_then_add64((volatile kmp_int64 *)(p), -1LL)
967 #define KMP_TEST_THEN_ADD8(p, v) \
968  __kmp_test_then_add8((volatile kmp_int8 *)(p), (kmp_int8)(v))
969 #define KMP_TEST_THEN_ADD32(p, v) \
970  __kmp_test_then_add32((volatile kmp_int32 *)(p), (kmp_int32)(v))
971 #define KMP_TEST_THEN_ADD64(p, v) \
972  __kmp_test_then_add64((volatile kmp_int64 *)(p), (kmp_int64)(v))
973 
974 #define KMP_TEST_THEN_OR8(p, v) \
975  __kmp_test_then_or8((volatile kmp_int8 *)(p), (kmp_int8)(v))
976 #define KMP_TEST_THEN_AND8(p, v) \
977  __kmp_test_then_and8((volatile kmp_int8 *)(p), (kmp_int8)(v))
978 #define KMP_TEST_THEN_OR32(p, v) \
979  __kmp_test_then_or32((volatile kmp_uint32 *)(p), (kmp_uint32)(v))
980 #define KMP_TEST_THEN_AND32(p, v) \
981  __kmp_test_then_and32((volatile kmp_uint32 *)(p), (kmp_uint32)(v))
982 #define KMP_TEST_THEN_OR64(p, v) \
983  __kmp_test_then_or64((volatile kmp_uint64 *)(p), (kmp_uint64)(v))
984 #define KMP_TEST_THEN_AND64(p, v) \
985  __kmp_test_then_and64((volatile kmp_uint64 *)(p), (kmp_uint64)(v))
986 
987 #define KMP_COMPARE_AND_STORE_ACQ8(p, cv, sv) \
988  __kmp_compare_and_store8((volatile kmp_int8 *)(p), (kmp_int8)(cv), \
989  (kmp_int8)(sv))
990 #define KMP_COMPARE_AND_STORE_REL8(p, cv, sv) \
991  __kmp_compare_and_store8((volatile kmp_int8 *)(p), (kmp_int8)(cv), \
992  (kmp_int8)(sv))
993 #define KMP_COMPARE_AND_STORE_ACQ16(p, cv, sv) \
994  __kmp_compare_and_store16((volatile kmp_int16 *)(p), (kmp_int16)(cv), \
995  (kmp_int16)(sv))
996 #define KMP_COMPARE_AND_STORE_REL16(p, cv, sv) \
997  __kmp_compare_and_store16((volatile kmp_int16 *)(p), (kmp_int16)(cv), \
998  (kmp_int16)(sv))
999 #define KMP_COMPARE_AND_STORE_ACQ32(p, cv, sv) \
1000  __kmp_compare_and_store32((volatile kmp_int32 *)(p), (kmp_int32)(cv), \
1001  (kmp_int32)(sv))
1002 #define KMP_COMPARE_AND_STORE_REL32(p, cv, sv) \
1003  __kmp_compare_and_store32((volatile kmp_int32 *)(p), (kmp_int32)(cv), \
1004  (kmp_int32)(sv))
1005 #define KMP_COMPARE_AND_STORE_ACQ64(p, cv, sv) \
1006  __kmp_compare_and_store64((volatile kmp_int64 *)(p), (kmp_int64)(cv), \
1007  (kmp_int64)(sv))
1008 #define KMP_COMPARE_AND_STORE_REL64(p, cv, sv) \
1009  __kmp_compare_and_store64((volatile kmp_int64 *)(p), (kmp_int64)(cv), \
1010  (kmp_int64)(sv))
1011 
1012 #if KMP_ARCH_X86
1013 #define KMP_COMPARE_AND_STORE_PTR(p, cv, sv) \
1014  __kmp_compare_and_store32((volatile kmp_int32 *)(p), (kmp_int32)(cv), \
1015  (kmp_int32)(sv))
1016 #else /* 64 bit pointers */
1017 #define KMP_COMPARE_AND_STORE_PTR(p, cv, sv) \
1018  __kmp_compare_and_store64((volatile kmp_int64 *)(p), (kmp_int64)(cv), \
1019  (kmp_int64)(sv))
1020 #endif /* KMP_ARCH_X86 */
1021 
1022 #define KMP_COMPARE_AND_STORE_RET8(p, cv, sv) \
1023  __kmp_compare_and_store_ret8((p), (cv), (sv))
1024 #define KMP_COMPARE_AND_STORE_RET16(p, cv, sv) \
1025  __kmp_compare_and_store_ret16((p), (cv), (sv))
1026 #define KMP_COMPARE_AND_STORE_RET32(p, cv, sv) \
1027  __kmp_compare_and_store_ret32((volatile kmp_int32 *)(p), (kmp_int32)(cv), \
1028  (kmp_int32)(sv))
1029 #define KMP_COMPARE_AND_STORE_RET64(p, cv, sv) \
1030  __kmp_compare_and_store_ret64((volatile kmp_int64 *)(p), (kmp_int64)(cv), \
1031  (kmp_int64)(sv))
1032 
1033 #define KMP_XCHG_FIXED8(p, v) \
1034  __kmp_xchg_fixed8((volatile kmp_int8 *)(p), (kmp_int8)(v));
1035 #define KMP_XCHG_FIXED16(p, v) __kmp_xchg_fixed16((p), (v));
1036 #define KMP_XCHG_FIXED32(p, v) __kmp_xchg_fixed32((p), (v));
1037 #define KMP_XCHG_FIXED64(p, v) __kmp_xchg_fixed64((p), (v));
1038 #define KMP_XCHG_REAL32(p, v) __kmp_xchg_real32((p), (v));
1039 #define KMP_XCHG_REAL64(p, v) __kmp_xchg_real64((p), (v));
1040 
1041 #endif /* KMP_ASM_INTRINS */
1042 
1043 /* ------------- relaxed consistency memory model stuff ------------------ */
1044 
1045 #if KMP_OS_WINDOWS
1046 #ifdef __ABSOFT_WIN
1047 #define KMP_MB() asm("nop")
1048 #define KMP_IMB() asm("nop")
1049 #else
1050 #define KMP_MB() /* _asm{ nop } */
1051 #define KMP_IMB() /* _asm{ nop } */
1052 #endif
1053 #endif /* KMP_OS_WINDOWS */
1054 
1055 #if KMP_ARCH_PPC64 || KMP_ARCH_ARM || KMP_ARCH_AARCH64 || KMP_ARCH_MIPS || \
1056  KMP_ARCH_MIPS64 || KMP_ARCH_RISCV64 || KMP_ARCH_LOONGARCH64 || \
1057  KMP_ARCH_VE || KMP_ARCH_S390X || KMP_ARCH_PPC || KMP_ARCH_AARCH64_32 || \
1058  KMP_ARCH_SPARC || KMP_ARCH_ARM64EC
1059 #if KMP_OS_WINDOWS
1060 #undef KMP_MB
1061 #define KMP_MB() std::atomic_thread_fence(std::memory_order_seq_cst)
1062 #else /* !KMP_OS_WINDOWS */
1063 #define KMP_MB() __sync_synchronize()
1064 #endif
1065 #endif
1066 
1067 #ifndef KMP_MB
1068 #define KMP_MB() /* nothing to do */
1069 #endif
1070 
1071 #if KMP_ARCH_X86 || KMP_ARCH_X86_64
1072 #if KMP_MIC
1073 // fence-style instructions do not exist, but lock; xaddl $0,(%rsp) can be used.
1074 // We shouldn't need it, though, since the ABI rules require that
1075 // * If the compiler generates NGO stores it also generates the fence
1076 // * If users hand-code NGO stores they should insert the fence
1077 // therefore no incomplete unordered stores should be visible.
1078 #define KMP_MFENCE() /* Nothing */
1079 #define KMP_SFENCE() /* Nothing */
1080 #else
1081 #if KMP_COMPILER_ICC || KMP_COMPILER_ICX
1082 #define KMP_MFENCE_() _mm_mfence()
1083 #define KMP_SFENCE_() _mm_sfence()
1084 #elif KMP_COMPILER_MSVC
1085 #define KMP_MFENCE_() MemoryBarrier()
1086 #define KMP_SFENCE_() MemoryBarrier()
1087 #else
1088 #define KMP_MFENCE_() __sync_synchronize()
1089 #define KMP_SFENCE_() __sync_synchronize()
1090 #endif
1091 #define KMP_MFENCE() \
1092  if (UNLIKELY(!__kmp_cpuinfo.initialized)) { \
1093  __kmp_query_cpuid(&__kmp_cpuinfo); \
1094  } \
1095  if (__kmp_cpuinfo.flags.sse2) { \
1096  KMP_MFENCE_(); \
1097  }
1098 #define KMP_SFENCE() KMP_SFENCE_()
1099 #endif
1100 #else
1101 #define KMP_MFENCE() KMP_MB()
1102 #define KMP_SFENCE() KMP_MB()
1103 #endif
1104 
1105 #ifndef KMP_IMB
1106 #define KMP_IMB() /* nothing to do */
1107 #endif
1108 
1109 #ifndef KMP_ST_REL32
1110 #define KMP_ST_REL32(A, D) (*(A) = (D))
1111 #endif
1112 
1113 #ifndef KMP_ST_REL64
1114 #define KMP_ST_REL64(A, D) (*(A) = (D))
1115 #endif
1116 
1117 #ifndef KMP_LD_ACQ32
1118 #define KMP_LD_ACQ32(A) (*(A))
1119 #endif
1120 
1121 #ifndef KMP_LD_ACQ64
1122 #define KMP_LD_ACQ64(A) (*(A))
1123 #endif
1124 
1125 /* ------------------------------------------------------------------------ */
1126 // FIXME - maybe this should this be
1127 //
1128 // #define TCR_4(a) (*(volatile kmp_int32 *)(&a))
1129 // #define TCW_4(a,b) (a) = (*(volatile kmp_int32 *)&(b))
1130 //
1131 // #define TCR_8(a) (*(volatile kmp_int64 *)(a))
1132 // #define TCW_8(a,b) (a) = (*(volatile kmp_int64 *)(&b))
1133 //
1134 // I'm fairly certain this is the correct thing to do, but I'm afraid
1135 // of performance regressions.
1136 
1137 #define TCR_1(a) (a)
1138 #define TCW_1(a, b) (a) = (b)
1139 #define TCR_4(a) (a)
1140 #define TCW_4(a, b) (a) = (b)
1141 #define TCI_4(a) (++(a))
1142 #define TCD_4(a) (--(a))
1143 #define TCR_8(a) (a)
1144 #define TCW_8(a, b) (a) = (b)
1145 #define TCI_8(a) (++(a))
1146 #define TCD_8(a) (--(a))
1147 #define TCR_SYNC_4(a) (a)
1148 #define TCW_SYNC_4(a, b) (a) = (b)
1149 #define TCX_SYNC_4(a, b, c) \
1150  KMP_COMPARE_AND_STORE_REL32((volatile kmp_int32 *)(volatile void *)&(a), \
1151  (kmp_int32)(b), (kmp_int32)(c))
1152 #define TCR_SYNC_8(a) (a)
1153 #define TCW_SYNC_8(a, b) (a) = (b)
1154 #define TCX_SYNC_8(a, b, c) \
1155  KMP_COMPARE_AND_STORE_REL64((volatile kmp_int64 *)(volatile void *)&(a), \
1156  (kmp_int64)(b), (kmp_int64)(c))
1157 
1158 #if KMP_ARCH_X86 || KMP_ARCH_MIPS || KMP_ARCH_WASM || KMP_ARCH_PPC
1159 // What about ARM?
1160 #define TCR_PTR(a) ((void *)TCR_4(a))
1161 #define TCW_PTR(a, b) TCW_4((a), (b))
1162 #define TCR_SYNC_PTR(a) ((void *)TCR_SYNC_4(a))
1163 #define TCW_SYNC_PTR(a, b) TCW_SYNC_4((a), (b))
1164 #define TCX_SYNC_PTR(a, b, c) ((void *)TCX_SYNC_4((a), (b), (c)))
1165 
1166 #else /* 64 bit pointers */
1167 
1168 #define TCR_PTR(a) ((void *)TCR_8(a))
1169 #define TCW_PTR(a, b) TCW_8((a), (b))
1170 #define TCR_SYNC_PTR(a) ((void *)TCR_SYNC_8(a))
1171 #define TCW_SYNC_PTR(a, b) TCW_SYNC_8((a), (b))
1172 #define TCX_SYNC_PTR(a, b, c) ((void *)TCX_SYNC_8((a), (b), (c)))
1173 
1174 #endif /* KMP_ARCH_X86 */
1175 
1176 /* If these FTN_{TRUE,FALSE} values change, may need to change several places
1177  where they are used to check that language is Fortran, not C. */
1178 
1179 #ifndef FTN_TRUE
1180 #define FTN_TRUE TRUE
1181 #endif
1182 
1183 #ifndef FTN_FALSE
1184 #define FTN_FALSE FALSE
1185 #endif
1186 
1187 typedef void (*microtask_t)(int *gtid, int *npr, ...);
1188 
1189 #ifdef USE_VOLATILE_CAST
1190 #define VOLATILE_CAST(x) (volatile x)
1191 #else
1192 #define VOLATILE_CAST(x) (x)
1193 #endif
1194 
1195 #define KMP_WAIT __kmp_wait_4
1196 #define KMP_WAIT_PTR __kmp_wait_4_ptr
1197 #define KMP_EQ __kmp_eq_4
1198 #define KMP_NEQ __kmp_neq_4
1199 #define KMP_LT __kmp_lt_4
1200 #define KMP_GE __kmp_ge_4
1201 #define KMP_LE __kmp_le_4
1202 
1203 /* Workaround for Intel(R) 64 code gen bug when taking address of static array
1204  * (Intel(R) 64 Tracker #138) */
1205 #if (KMP_ARCH_X86_64 || KMP_ARCH_PPC64) && KMP_OS_LINUX
1206 #define STATIC_EFI2_WORKAROUND
1207 #else
1208 #define STATIC_EFI2_WORKAROUND static
1209 #endif
1210 
1211 // Support of BGET usage
1212 #ifndef KMP_USE_BGET
1213 #define KMP_USE_BGET 1
1214 #endif
1215 
1216 // Switches for OSS builds
1217 #ifndef USE_CMPXCHG_FIX
1218 #define USE_CMPXCHG_FIX 1
1219 #endif
1220 
1221 // Enable dynamic user lock
1222 #define KMP_USE_DYNAMIC_LOCK 1
1223 
1224 // Enable Intel(R) Transactional Synchronization Extensions (Intel(R) TSX) if
1225 // dynamic user lock is turned on
1226 #if KMP_USE_DYNAMIC_LOCK
1227 // Visual studio can't handle the asm sections in this code
1228 #define KMP_USE_TSX (KMP_ARCH_X86 || KMP_ARCH_X86_64) && !KMP_COMPILER_MSVC
1229 #ifdef KMP_USE_ADAPTIVE_LOCKS
1230 #undef KMP_USE_ADAPTIVE_LOCKS
1231 #endif
1232 #define KMP_USE_ADAPTIVE_LOCKS KMP_USE_TSX
1233 #endif
1234 
1235 // Enable tick time conversion of ticks to seconds
1236 #if KMP_STATS_ENABLED
1237 #define KMP_HAVE_TICK_TIME \
1238  (KMP_OS_LINUX && (KMP_MIC || KMP_ARCH_X86 || KMP_ARCH_X86_64))
1239 #endif
1240 
1241 // Warning levels
1242 enum kmp_warnings_level {
1243  kmp_warnings_off = 0, /* No warnings */
1244  kmp_warnings_low, /* Minimal warnings (default) */
1245  kmp_warnings_explicit = 6, /* Explicitly set to ON - more warnings */
1246  kmp_warnings_verbose /* reserved */
1247 };
1248 
1249 #ifdef __cplusplus
1250 } // extern "C"
1251 #endif // __cplusplus
1252 
1253 // Safe C API
1254 #include "kmp_safe_c_api.h"
1255 
1256 // Macros for C++11 atomic functions
1257 #define KMP_ATOMIC_LD(p, order) (p)->load(std::memory_order_##order)
1258 #define KMP_ATOMIC_OP(op, p, v, order) (p)->op(v, std::memory_order_##order)
1259 
1260 // For non-default load/store
1261 #define KMP_ATOMIC_LD_ACQ(p) KMP_ATOMIC_LD(p, acquire)
1262 #define KMP_ATOMIC_LD_RLX(p) KMP_ATOMIC_LD(p, relaxed)
1263 #define KMP_ATOMIC_ST_REL(p, v) KMP_ATOMIC_OP(store, p, v, release)
1264 #define KMP_ATOMIC_ST_RLX(p, v) KMP_ATOMIC_OP(store, p, v, relaxed)
1265 
1266 // For non-default fetch_<op>
1267 #define KMP_ATOMIC_ADD(p, v) KMP_ATOMIC_OP(fetch_add, p, v, acq_rel)
1268 #define KMP_ATOMIC_SUB(p, v) KMP_ATOMIC_OP(fetch_sub, p, v, acq_rel)
1269 #define KMP_ATOMIC_AND(p, v) KMP_ATOMIC_OP(fetch_and, p, v, acq_rel)
1270 #define KMP_ATOMIC_OR(p, v) KMP_ATOMIC_OP(fetch_or, p, v, acq_rel)
1271 #define KMP_ATOMIC_INC(p) KMP_ATOMIC_OP(fetch_add, p, 1, acq_rel)
1272 #define KMP_ATOMIC_DEC(p) KMP_ATOMIC_OP(fetch_sub, p, 1, acq_rel)
1273 #define KMP_ATOMIC_ADD_RLX(p, v) KMP_ATOMIC_OP(fetch_add, p, v, relaxed)
1274 #define KMP_ATOMIC_INC_RLX(p) KMP_ATOMIC_OP(fetch_add, p, 1, relaxed)
1275 
1276 // Callers of the following functions cannot see the side effect on "expected".
1277 template <typename T>
1278 bool __kmp_atomic_compare_store(std::atomic<T> *p, T expected, T desired) {
1279  return p->compare_exchange_strong(
1280  expected, desired, std::memory_order_acq_rel, std::memory_order_relaxed);
1281 }
1282 
1283 template <typename T>
1284 bool __kmp_atomic_compare_store_acq(std::atomic<T> *p, T expected, T desired) {
1285  return p->compare_exchange_strong(
1286  expected, desired, std::memory_order_acquire, std::memory_order_relaxed);
1287 }
1288 
1289 template <typename T>
1290 bool __kmp_atomic_compare_store_rel(std::atomic<T> *p, T expected, T desired) {
1291  return p->compare_exchange_strong(
1292  expected, desired, std::memory_order_release, std::memory_order_relaxed);
1293 }
1294 
1295 // Symbol lookup on Linux/Windows
1296 #if KMP_OS_WINDOWS
1297 extern void *__kmp_lookup_symbol(const char *name, bool next = false);
1298 #define KMP_DLSYM(name) __kmp_lookup_symbol(name)
1299 #define KMP_DLSYM_NEXT(name) __kmp_lookup_symbol(name, true)
1300 #elif KMP_OS_WASI || KMP_OS_EMSCRIPTEN
1301 #define KMP_DLSYM(name) nullptr
1302 #define KMP_DLSYM_NEXT(name) nullptr
1303 #else
1304 #define KMP_DLSYM(name) dlsym(RTLD_DEFAULT, name)
1305 #define KMP_DLSYM_NEXT(name) dlsym(RTLD_NEXT, name)
1306 #endif
1307 
1308 // MSVC doesn't have this, but clang/clang-cl does.
1309 #ifndef __has_builtin
1310 #define __has_builtin(x) 0
1311 #endif
1312 
1313 // Same as LLVM_BUILTIN_UNREACHABLE. States that it is UB to reach this point.
1314 #if __has_builtin(__builtin_unreachable) || defined(__GNUC__)
1315 #define KMP_BUILTIN_UNREACHABLE __builtin_unreachable()
1316 #elif defined(_MSC_VER)
1317 #define KMP_BUILTIN_UNREACHABLE __assume(false)
1318 #else
1319 #define KMP_BUILTIN_UNREACHABLE
1320 #endif
1321 
1322 #endif /* KMP_OS_H */