1 /*
2  * kmp_global.cpp -- KPTS global variables for runtime support library
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 #include "kmp.h"
14 #include "kmp_affinity.h"
15 #if KMP_USE_HIER_SCHED
16 #include "kmp_dispatch_hier.h"
17 #endif
18 
19 kmp_key_t __kmp_gtid_threadprivate_key;
20 
21 #if KMP_ARCH_X86 || KMP_ARCH_X86_64
22 kmp_cpuinfo_t __kmp_cpuinfo = {0}; // Not initialized
23 #endif
24 
25 #if KMP_STATS_ENABLED
26 #include "kmp_stats.h"
27 // lock for modifying the global __kmp_stats_list
28 kmp_tas_lock_t __kmp_stats_lock;
29 
30 // global list of per thread stats, the head is a sentinel node which
31 // accumulates all stats produced before __kmp_create_worker is called.
32 kmp_stats_list *__kmp_stats_list;
33 
34 // thread local pointer to stats node within list
35 KMP_THREAD_LOCAL kmp_stats_list *__kmp_stats_thread_ptr = NULL;
36 
37 // gives reference tick for all events (considered the 0 tick)
38 tsc_tick_count __kmp_stats_start_time;
39 #endif
40 
41 /* ----------------------------------------------------- */
42 /* INITIALIZATION VARIABLES */
43 /* they are syncronized to write during init, but read anytime */
44 volatile int __kmp_init_serial = FALSE;
45 volatile int __kmp_init_gtid = FALSE;
46 volatile int __kmp_init_common = FALSE;
47 volatile int __kmp_init_middle = FALSE;
48 volatile int __kmp_init_parallel = FALSE;
49 #if KMP_USE_MONITOR
50 volatile int __kmp_init_monitor =
51     0; /* 1 - launched, 2 - actually started (Windows* OS only) */
52 #endif
53 volatile int __kmp_init_user_locks = FALSE;
54 
55 /* list of address of allocated caches for commons */
56 kmp_cached_addr_t *__kmp_threadpriv_cache_list = NULL;
57 
58 int __kmp_init_counter = 0;
59 int __kmp_root_counter = 0;
60 int __kmp_version = 0;
61 
62 std::atomic<kmp_int32> __kmp_team_counter = ATOMIC_VAR_INIT(0);
63 std::atomic<kmp_int32> __kmp_task_counter = ATOMIC_VAR_INIT(0);
64 
65 size_t __kmp_stksize = KMP_DEFAULT_STKSIZE;
66 #if KMP_USE_MONITOR
67 size_t __kmp_monitor_stksize = 0; // auto adjust
68 #endif
69 size_t __kmp_stkoffset = KMP_DEFAULT_STKOFFSET;
70 int __kmp_stkpadding = KMP_MIN_STKPADDING;
71 
72 size_t __kmp_malloc_pool_incr = KMP_DEFAULT_MALLOC_POOL_INCR;
73 
74 // Barrier method defaults, settings, and strings.
75 // branch factor = 2^branch_bits (only relevant for tree & hyper barrier types)
76 kmp_uint32 __kmp_barrier_gather_bb_dflt = 2;
77 /* branch_factor = 4 */ /* hyper2: C78980 */
78 kmp_uint32 __kmp_barrier_release_bb_dflt = 2;
79 /* branch_factor = 4 */ /* hyper2: C78980 */
80 
81 kmp_bar_pat_e __kmp_barrier_gather_pat_dflt = bp_hyper_bar;
82 /* hyper2: C78980 */
83 kmp_bar_pat_e __kmp_barrier_release_pat_dflt = bp_hyper_bar;
84 /* hyper2: C78980 */
85 
86 kmp_uint32 __kmp_barrier_gather_branch_bits[bs_last_barrier] = {0};
87 kmp_uint32 __kmp_barrier_release_branch_bits[bs_last_barrier] = {0};
88 kmp_bar_pat_e __kmp_barrier_gather_pattern[bs_last_barrier] = {bp_linear_bar};
89 kmp_bar_pat_e __kmp_barrier_release_pattern[bs_last_barrier] = {bp_linear_bar};
90 char const *__kmp_barrier_branch_bit_env_name[bs_last_barrier] = {
91     "KMP_PLAIN_BARRIER", "KMP_FORKJOIN_BARRIER"
92 #if KMP_FAST_REDUCTION_BARRIER
93     ,
94     "KMP_REDUCTION_BARRIER"
95 #endif // KMP_FAST_REDUCTION_BARRIER
96 };
97 char const *__kmp_barrier_pattern_env_name[bs_last_barrier] = {
98     "KMP_PLAIN_BARRIER_PATTERN", "KMP_FORKJOIN_BARRIER_PATTERN"
99 #if KMP_FAST_REDUCTION_BARRIER
100     ,
101     "KMP_REDUCTION_BARRIER_PATTERN"
102 #endif // KMP_FAST_REDUCTION_BARRIER
103 };
104 char const *__kmp_barrier_type_name[bs_last_barrier] = {"plain", "forkjoin"
105 #if KMP_FAST_REDUCTION_BARRIER
106                                                         ,
107                                                         "reduction"
108 #endif // KMP_FAST_REDUCTION_BARRIER
109 };
110 char const *__kmp_barrier_pattern_name[bp_last_bar] = {"linear", "tree",
111                                                        "hyper", "hierarchical"};
112 
113 int __kmp_allThreadsSpecified = 0;
114 size_t __kmp_align_alloc = CACHE_LINE;
115 
116 int __kmp_generate_warnings = kmp_warnings_low;
117 int __kmp_reserve_warn = 0;
118 int __kmp_xproc = 0;
119 int __kmp_avail_proc = 0;
120 size_t __kmp_sys_min_stksize = KMP_MIN_STKSIZE;
121 int __kmp_sys_max_nth = KMP_MAX_NTH;
122 int __kmp_max_nth = 0;
123 int __kmp_cg_max_nth = 0;
124 int __kmp_teams_max_nth = 0;
125 int __kmp_threads_capacity = 0;
126 int __kmp_dflt_team_nth = 0;
127 int __kmp_dflt_team_nth_ub = 0;
128 int __kmp_tp_capacity = 0;
129 int __kmp_tp_cached = 0;
130 int __kmp_dispatch_num_buffers = KMP_DFLT_DISP_NUM_BUFF;
131 int __kmp_dflt_max_active_levels = 1; // Nesting off by default
132 bool __kmp_dflt_max_active_levels_set = false; // Don't override set value
133 #if KMP_NESTED_HOT_TEAMS
134 int __kmp_hot_teams_mode = 0; /* 0 - free extra threads when reduced */
135 /* 1 - keep extra threads when reduced */
136 int __kmp_hot_teams_max_level = 1; /* nesting level of hot teams */
137 #endif
138 enum library_type __kmp_library = library_none;
139 enum sched_type __kmp_sched =
140     kmp_sch_default; /* scheduling method for runtime scheduling */
141 enum sched_type __kmp_static =
142     kmp_sch_static_greedy; /* default static scheduling method */
143 enum sched_type __kmp_guided =
144     kmp_sch_guided_iterative_chunked; /* default guided scheduling method */
145 enum sched_type __kmp_auto =
146     kmp_sch_guided_analytical_chunked; /* default auto scheduling method */
147 #if KMP_USE_HIER_SCHED
148 int __kmp_dispatch_hand_threading = 0;
149 int __kmp_hier_max_units[kmp_hier_layer_e::LAYER_LAST + 1];
150 int __kmp_hier_threads_per[kmp_hier_layer_e::LAYER_LAST + 1];
151 kmp_hier_sched_env_t __kmp_hier_scheds = {0, 0, NULL, NULL, NULL};
152 #endif
153 int __kmp_dflt_blocktime = KMP_DEFAULT_BLOCKTIME;
154 #if KMP_USE_MONITOR
155 int __kmp_monitor_wakeups = KMP_MIN_MONITOR_WAKEUPS;
156 int __kmp_bt_intervals = KMP_INTERVALS_FROM_BLOCKTIME(KMP_DEFAULT_BLOCKTIME,
157                                                       KMP_MIN_MONITOR_WAKEUPS);
158 #endif
159 #ifdef KMP_ADJUST_BLOCKTIME
160 int __kmp_zero_bt = FALSE;
161 #endif /* KMP_ADJUST_BLOCKTIME */
162 #ifdef KMP_DFLT_NTH_CORES
163 int __kmp_ncores = 0;
164 #endif
165 int __kmp_chunk = 0;
166 int __kmp_abort_delay = 0;
167 #if KMP_OS_LINUX && defined(KMP_TDATA_GTID)
168 int __kmp_gtid_mode = 3; /* use __declspec(thread) TLS to store gtid */
169 int __kmp_adjust_gtid_mode = FALSE;
170 #elif KMP_OS_WINDOWS
171 int __kmp_gtid_mode = 2; /* use TLS functions to store gtid */
172 int __kmp_adjust_gtid_mode = FALSE;
173 #else
174 int __kmp_gtid_mode = 0; /* select method to get gtid based on #threads */
175 int __kmp_adjust_gtid_mode = TRUE;
176 #endif /* KMP_OS_LINUX && defined(KMP_TDATA_GTID) */
177 #ifdef KMP_TDATA_GTID
178 KMP_THREAD_LOCAL int __kmp_gtid = KMP_GTID_DNE;
179 #endif /* KMP_TDATA_GTID */
180 int __kmp_tls_gtid_min = INT_MAX;
181 int __kmp_foreign_tp = TRUE;
182 #if KMP_ARCH_X86 || KMP_ARCH_X86_64
183 int __kmp_inherit_fp_control = TRUE;
184 kmp_int16 __kmp_init_x87_fpu_control_word = 0;
185 kmp_uint32 __kmp_init_mxcsr = 0;
186 #endif /* KMP_ARCH_X86 || KMP_ARCH_X86_64 */
187 
188 #ifdef USE_LOAD_BALANCE
189 double __kmp_load_balance_interval = 1.0;
190 #endif /* USE_LOAD_BALANCE */
191 
192 kmp_nested_nthreads_t __kmp_nested_nth = {NULL, 0, 0};
193 
194 #if KMP_USE_ADAPTIVE_LOCKS
195 
196 kmp_adaptive_backoff_params_t __kmp_adaptive_backoff_params = {
197     1, 1024}; // TODO: tune it!
198 
199 #if KMP_DEBUG_ADAPTIVE_LOCKS
200 const char *__kmp_speculative_statsfile = "-";
201 #endif
202 
203 #endif // KMP_USE_ADAPTIVE_LOCKS
204 
205 int __kmp_display_env = FALSE;
206 int __kmp_display_env_verbose = FALSE;
207 int __kmp_omp_cancellation = FALSE;
208 
209 #if KMP_HAVE_MWAIT || KMP_HAVE_UMWAIT
210 int __kmp_user_level_mwait = FALSE;
211 int __kmp_umwait_enabled = FALSE;
212 int __kmp_mwait_enabled = FALSE;
213 int __kmp_mwait_hints = 0;
214 #endif
215 
216 /* map OMP 3.0 schedule types with our internal schedule types */
217 enum sched_type __kmp_sch_map[kmp_sched_upper - kmp_sched_lower_ext +
218                               kmp_sched_upper_std - kmp_sched_lower - 2] = {
219     kmp_sch_static_chunked, // ==> kmp_sched_static            = 1
220     kmp_sch_dynamic_chunked, // ==> kmp_sched_dynamic           = 2
221     kmp_sch_guided_chunked, // ==> kmp_sched_guided            = 3
222     kmp_sch_auto, // ==> kmp_sched_auto              = 4
223     kmp_sch_trapezoidal // ==> kmp_sched_trapezoidal       = 101
224     // will likely not be used, introduced here just to debug the code
225     // of public intel extension schedules
226 };
227 
228 #if KMP_OS_LINUX
229 enum clock_function_type __kmp_clock_function;
230 int __kmp_clock_function_param;
231 #endif /* KMP_OS_LINUX */
232 
233 #if KMP_MIC_SUPPORTED
234 enum mic_type __kmp_mic_type = non_mic;
235 #endif
236 
237 #if KMP_AFFINITY_SUPPORTED
238 
239 KMPAffinity *__kmp_affinity_dispatch = NULL;
240 
241 #if KMP_USE_HWLOC
242 int __kmp_hwloc_error = FALSE;
243 hwloc_topology_t __kmp_hwloc_topology = NULL;
244 int __kmp_numa_detected = FALSE;
245 int __kmp_tile_depth = 0;
246 #endif
247 
248 #if KMP_OS_WINDOWS
249 #if KMP_GROUP_AFFINITY
250 int __kmp_num_proc_groups = 1;
251 #endif /* KMP_GROUP_AFFINITY */
252 kmp_GetActiveProcessorCount_t __kmp_GetActiveProcessorCount = NULL;
253 kmp_GetActiveProcessorGroupCount_t __kmp_GetActiveProcessorGroupCount = NULL;
254 kmp_GetThreadGroupAffinity_t __kmp_GetThreadGroupAffinity = NULL;
255 kmp_SetThreadGroupAffinity_t __kmp_SetThreadGroupAffinity = NULL;
256 #endif /* KMP_OS_WINDOWS */
257 
258 size_t __kmp_affin_mask_size = 0;
259 enum affinity_type __kmp_affinity_type = affinity_default;
260 enum affinity_gran __kmp_affinity_gran = affinity_gran_default;
261 int __kmp_affinity_gran_levels = -1;
262 int __kmp_affinity_dups = TRUE;
263 enum affinity_top_method __kmp_affinity_top_method =
264     affinity_top_method_default;
265 int __kmp_affinity_compact = 0;
266 int __kmp_affinity_offset = 0;
267 int __kmp_affinity_verbose = FALSE;
268 int __kmp_affinity_warnings = TRUE;
269 int __kmp_affinity_respect_mask = affinity_respect_mask_default;
270 char *__kmp_affinity_proclist = NULL;
271 kmp_affin_mask_t *__kmp_affinity_masks = NULL;
272 unsigned __kmp_affinity_num_masks = 0;
273 
274 char *__kmp_cpuinfo_file = NULL;
275 
276 #endif /* KMP_AFFINITY_SUPPORTED */
277 
278 kmp_nested_proc_bind_t __kmp_nested_proc_bind = {NULL, 0, 0};
279 int __kmp_affinity_num_places = 0;
280 int __kmp_display_affinity = FALSE;
281 char *__kmp_affinity_format = NULL;
282 
283 kmp_hws_item_t __kmp_hws_socket = {0, 0};
284 kmp_hws_item_t __kmp_hws_node = {0, 0};
285 kmp_hws_item_t __kmp_hws_tile = {0, 0};
286 kmp_hws_item_t __kmp_hws_core = {0, 0};
287 kmp_hws_item_t __kmp_hws_proc = {0, 0};
288 int __kmp_hws_requested = 0;
289 int __kmp_hws_abs_flag = 0; // absolute or per-item number requested
290 
291 kmp_int32 __kmp_default_device = 0;
292 
293 kmp_tasking_mode_t __kmp_tasking_mode = tskm_task_teams;
294 kmp_int32 __kmp_max_task_priority = 0;
295 kmp_uint64 __kmp_taskloop_min_tasks = 0;
296 
297 int __kmp_memkind_available = 0;
298 omp_allocator_handle_t const omp_null_allocator = NULL;
299 omp_allocator_handle_t const omp_default_mem_alloc =
300     (omp_allocator_handle_t const)1;
301 omp_allocator_handle_t const omp_large_cap_mem_alloc =
302     (omp_allocator_handle_t const)2;
303 omp_allocator_handle_t const omp_const_mem_alloc =
304     (omp_allocator_handle_t const)3;
305 omp_allocator_handle_t const omp_high_bw_mem_alloc =
306     (omp_allocator_handle_t const)4;
307 omp_allocator_handle_t const omp_low_lat_mem_alloc =
308     (omp_allocator_handle_t const)5;
309 omp_allocator_handle_t const omp_cgroup_mem_alloc =
310     (omp_allocator_handle_t const)6;
311 omp_allocator_handle_t const omp_pteam_mem_alloc =
312     (omp_allocator_handle_t const)7;
313 omp_allocator_handle_t const omp_thread_mem_alloc =
314     (omp_allocator_handle_t const)8;
315 omp_allocator_handle_t const kmp_max_mem_alloc =
316     (omp_allocator_handle_t const)1024;
317 omp_allocator_handle_t __kmp_def_allocator = omp_default_mem_alloc;
318 
319 omp_memspace_handle_t const omp_default_mem_space =
320     (omp_memspace_handle_t const)0;
321 omp_memspace_handle_t const omp_large_cap_mem_space =
322     (omp_memspace_handle_t const)1;
323 omp_memspace_handle_t const omp_const_mem_space =
324     (omp_memspace_handle_t const)2;
325 omp_memspace_handle_t const omp_high_bw_mem_space =
326     (omp_memspace_handle_t const)3;
327 omp_memspace_handle_t const omp_low_lat_mem_space =
328     (omp_memspace_handle_t const)4;
329 
330 /* This check ensures that the compiler is passing the correct data type for the
331    flags formal parameter of the function kmpc_omp_task_alloc(). If the type is
332    not a 4-byte type, then give an error message about a non-positive length
333    array pointing here.  If that happens, the kmp_tasking_flags_t structure must
334    be redefined to have exactly 32 bits. */
335 KMP_BUILD_ASSERT(sizeof(kmp_tasking_flags_t) == 4);
336 
337 int __kmp_task_stealing_constraint = 1; /* Constrain task stealing by default */
338 int __kmp_enable_task_throttling = 1;
339 
340 #ifdef DEBUG_SUSPEND
341 int __kmp_suspend_count = 0;
342 #endif
343 
344 int __kmp_settings = FALSE;
345 int __kmp_duplicate_library_ok = 0;
346 #if USE_ITT_BUILD
347 int __kmp_forkjoin_frames = 1;
348 int __kmp_forkjoin_frames_mode = 3;
349 #endif
350 PACKED_REDUCTION_METHOD_T __kmp_force_reduction_method =
351     reduction_method_not_defined;
352 int __kmp_determ_red = FALSE;
353 
354 #ifdef KMP_DEBUG
355 int kmp_a_debug = 0;
356 int kmp_b_debug = 0;
357 int kmp_c_debug = 0;
358 int kmp_d_debug = 0;
359 int kmp_e_debug = 0;
360 int kmp_f_debug = 0;
361 int kmp_diag = 0;
362 #endif
363 
364 /* For debug information logging using rotating buffer */
365 int __kmp_debug_buf =
366     FALSE; /* TRUE means use buffer, FALSE means print to stderr */
367 int __kmp_debug_buf_lines =
368     KMP_DEBUG_BUF_LINES_INIT; /* Lines of debug stored in buffer */
369 int __kmp_debug_buf_chars =
370     KMP_DEBUG_BUF_CHARS_INIT; /* Characters allowed per line in buffer */
371 int __kmp_debug_buf_atomic =
372     FALSE; /* TRUE means use atomic update of buffer entry pointer */
373 
374 char *__kmp_debug_buffer = NULL; /* Debug buffer itself */
375 std::atomic<int> __kmp_debug_count =
376     ATOMIC_VAR_INIT(0); /* number of lines printed in buffer so far */
377 int __kmp_debug_buf_warn_chars =
378     0; /* Keep track of char increase recommended in warnings */
379 /* end rotating debug buffer */
380 
381 #ifdef KMP_DEBUG
382 int __kmp_par_range; /* +1 => only go par for constructs in range */
383 /* -1 => only go par for constructs outside range */
384 char __kmp_par_range_routine[KMP_PAR_RANGE_ROUTINE_LEN] = {'\0'};
385 char __kmp_par_range_filename[KMP_PAR_RANGE_FILENAME_LEN] = {'\0'};
386 int __kmp_par_range_lb = 0;
387 int __kmp_par_range_ub = INT_MAX;
388 #endif /* KMP_DEBUG */
389 
390 /* For printing out dynamic storage map for threads and teams */
391 int __kmp_storage_map =
392     FALSE; /* True means print storage map for threads and teams */
393 int __kmp_storage_map_verbose =
394     FALSE; /* True means storage map includes placement info */
395 int __kmp_storage_map_verbose_specified = FALSE;
396 /* Initialize the library data structures when we fork a child process, defaults
397  * to TRUE */
398 int __kmp_need_register_atfork =
399     TRUE; /* At initialization, call pthread_atfork to install fork handler */
400 int __kmp_need_register_atfork_specified = TRUE;
401 
402 int __kmp_env_stksize = FALSE; /* KMP_STACKSIZE specified? */
403 int __kmp_env_blocktime = FALSE; /* KMP_BLOCKTIME specified? */
404 int __kmp_env_checks = FALSE; /* KMP_CHECKS specified?    */
405 int __kmp_env_consistency_check = FALSE; /* KMP_CONSISTENCY_CHECK specified? */
406 
407 // From KMP_USE_YIELD:
408 // 0 = never yield;
409 // 1 = always yield (default);
410 // 2 = yield only if oversubscribed
411 kmp_int32 __kmp_use_yield = 1;
412 // This will be 1 if KMP_USE_YIELD environment variable was set explicitly
413 kmp_int32 __kmp_use_yield_exp_set = 0;
414 
415 kmp_uint32 __kmp_yield_init = KMP_INIT_WAIT;
416 kmp_uint32 __kmp_yield_next = KMP_NEXT_WAIT;
417 
418 /* ------------------------------------------------------ */
419 /* STATE mostly syncronized with global lock */
420 /* data written to rarely by masters, read often by workers */
421 /* TODO: None of this global padding stuff works consistently because the order
422    of declaration is not necessarily correlated to storage order. To fix this,
423    all the important globals must be put in a big structure instead. */
424 KMP_ALIGN_CACHE
425 kmp_info_t **__kmp_threads = NULL;
426 kmp_root_t **__kmp_root = NULL;
427 
428 /* data read/written to often by masters */
429 KMP_ALIGN_CACHE
430 volatile int __kmp_nth = 0;
431 volatile int __kmp_all_nth = 0;
432 volatile kmp_info_t *__kmp_thread_pool = NULL;
433 volatile kmp_team_t *__kmp_team_pool = NULL;
434 
435 KMP_ALIGN_CACHE
436 std::atomic<int> __kmp_thread_pool_active_nth = ATOMIC_VAR_INIT(0);
437 
438 /* -------------------------------------------------
439  * GLOBAL/ROOT STATE */
440 KMP_ALIGN_CACHE
441 kmp_global_t __kmp_global;
442 
443 /* ----------------------------------------------- */
444 /* GLOBAL SYNCHRONIZATION LOCKS */
445 /* TODO verify the need for these locks and if they need to be global */
446 
447 #if KMP_USE_INTERNODE_ALIGNMENT
448 /* Multinode systems have larger cache line granularity which can cause
449  * false sharing if the alignment is not large enough for these locks */
450 KMP_ALIGN_CACHE_INTERNODE
451 
452 KMP_BOOTSTRAP_LOCK_INIT(__kmp_initz_lock); /* Control initializations */
453 KMP_ALIGN_CACHE_INTERNODE
454 KMP_BOOTSTRAP_LOCK_INIT(__kmp_forkjoin_lock); /* control fork/join access */
455 KMP_ALIGN_CACHE_INTERNODE
456 KMP_BOOTSTRAP_LOCK_INIT(__kmp_exit_lock); /* exit() is not always thread-safe */
457 #if KMP_USE_MONITOR
458 /* control monitor thread creation */
459 KMP_ALIGN_CACHE_INTERNODE
460 KMP_BOOTSTRAP_LOCK_INIT(__kmp_monitor_lock);
461 #endif
462 /* used for the hack to allow threadprivate cache and __kmp_threads expansion
463    to co-exist */
464 KMP_ALIGN_CACHE_INTERNODE
465 KMP_BOOTSTRAP_LOCK_INIT(__kmp_tp_cached_lock);
466 
467 KMP_ALIGN_CACHE_INTERNODE
468 KMP_LOCK_INIT(__kmp_global_lock); /* Control OS/global access */
469 KMP_ALIGN_CACHE_INTERNODE
470 kmp_queuing_lock_t __kmp_dispatch_lock; /* Control dispatch access  */
471 KMP_ALIGN_CACHE_INTERNODE
472 KMP_LOCK_INIT(__kmp_debug_lock); /* Control I/O access for KMP_DEBUG */
473 #else
474 KMP_ALIGN_CACHE
475 
476 KMP_BOOTSTRAP_LOCK_INIT(__kmp_initz_lock); /* Control initializations */
477 KMP_BOOTSTRAP_LOCK_INIT(__kmp_forkjoin_lock); /* control fork/join access */
478 KMP_BOOTSTRAP_LOCK_INIT(__kmp_exit_lock); /* exit() is not always thread-safe */
479 #if KMP_USE_MONITOR
480 /* control monitor thread creation */
481 KMP_BOOTSTRAP_LOCK_INIT(__kmp_monitor_lock);
482 #endif
483 /* used for the hack to allow threadprivate cache and __kmp_threads expansion
484    to co-exist */
485 KMP_BOOTSTRAP_LOCK_INIT(__kmp_tp_cached_lock);
486 
487 KMP_ALIGN(128)
488 KMP_LOCK_INIT(__kmp_global_lock); /* Control OS/global access */
489 KMP_ALIGN(128)
490 kmp_queuing_lock_t __kmp_dispatch_lock; /* Control dispatch access  */
491 KMP_ALIGN(128)
492 KMP_LOCK_INIT(__kmp_debug_lock); /* Control I/O access for KMP_DEBUG */
493 #endif
494 
495 /* ----------------------------------------------- */
496 
497 #if KMP_HANDLE_SIGNALS
498 /* Signal handling is disabled by default, because it confuses users: In case of
499    sigsegv (or other trouble) in user code signal handler catches the signal,
500    which then "appears" in the monitor thread (when the monitor executes raise()
501    function). Users see signal in the monitor thread and blame OpenMP RTL.
502 
503    Grant said signal handling required on some older OSes (Irix?) supported by
504    KAI, because bad applications hung but not aborted. Currently it is not a
505    problem for Linux* OS, OS X* and Windows* OS.
506 
507    Grant: Found new hangs for EL4, EL5, and a Fedora Core machine.  So I'm
508    putting the default back for now to see if that fixes hangs on those
509    machines.
510 
511    2010-04013 Lev: It was a bug in Fortran RTL. Fortran RTL prints a kind of
512    stack backtrace when program is aborting, but the code is not signal-safe.
513    When multiple signals raised at the same time (which occurs in dynamic
514    negative tests because all the worker threads detects the same error),
515    Fortran RTL may hang. The bug finally fixed in Fortran RTL library provided
516    by Steve R., and will be available soon. */
517 int __kmp_handle_signals = FALSE;
518 #endif
519 
520 #ifdef DEBUG_SUSPEND
521 int get_suspend_count_(void) {
522   int count = __kmp_suspend_count;
523   __kmp_suspend_count = 0;
524   return count;
525 }
526 void set_suspend_count_(int *value) { __kmp_suspend_count = *value; }
527 #endif
528 
529 // Symbols for MS mutual detection.
530 int _You_must_link_with_exactly_one_OpenMP_library = 1;
531 int _You_must_link_with_Intel_OpenMP_library = 1;
532 #if KMP_OS_WINDOWS && (KMP_VERSION_MAJOR > 4)
533 int _You_must_link_with_Microsoft_OpenMP_library = 1;
534 #endif
535 
536 kmp_target_offload_kind_t __kmp_target_offload = tgt_default;
537 
538 // OMP Pause Resources
539 kmp_pause_status_t __kmp_pause_status = kmp_not_paused;
540 
541 // end of file //
542