Intel® OpenMP* Runtime Library
 All Classes Functions Variables Typedefs Enumerations Enumerator Modules Pages
kmp_global.c
1 /*
2  * kmp_global.c -- KPTS global variables for runtime support library
3  * $Revision: 43473 $
4  * $Date: 2014-09-26 15:02:57 -0500 (Fri, 26 Sep 2014) $
5  */
6 
7 /* <copyright>
8  Copyright (c) 1997-2014 Intel Corporation. All Rights Reserved.
9 
10  Redistribution and use in source and binary forms, with or without
11  modification, are permitted provided that the following conditions
12  are met:
13 
14  * Redistributions of source code must retain the above copyright
15  notice, this list of conditions and the following disclaimer.
16  * Redistributions in binary form must reproduce the above copyright
17  notice, this list of conditions and the following disclaimer in the
18  documentation and/or other materials provided with the distribution.
19  * Neither the name of Intel Corporation nor the names of its
20  contributors may be used to endorse or promote products derived
21  from this software without specific prior written permission.
22 
23  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
24  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
25  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
26  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
27  HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
28  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
29  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
30  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
31  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
32  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
33  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34 
35 </copyright> */
36 
37 #include "kmp.h"
38 
39 #ifdef KMP_SETVERSION
40 char __kmp_setversion_string[] = VERSION_STRING;
41 #endif
42 
43 kmp_key_t __kmp_gtid_threadprivate_key;
44 
45 kmp_cpuinfo_t __kmp_cpuinfo = { 0 }; // Not initialized
46 
47 #if KMP_STATS_ENABLED
48 #include "kmp_stats.h"
49 // lock for modifying the global __kmp_stats_list
50 kmp_tas_lock_t __kmp_stats_lock = KMP_TAS_LOCK_INITIALIZER(__kmp_stats_lock);
51 
52 // global list of per thread stats, the head is a sentinel node which accumulates all stats produced before __kmp_create_worker is called.
53 kmp_stats_list __kmp_stats_list;
54 
55 // thread local pointer to stats node within list
56 __thread kmp_stats_list* __kmp_stats_thread_ptr = &__kmp_stats_list;
57 
58 // gives reference tick for all events (considered the 0 tick)
59 tsc_tick_count __kmp_stats_start_time;
60 #endif
61 
62 /* ----------------------------------------------------- */
63 /* INITIALIZATION VARIABLES */
64 /* they are syncronized to write during init, but read anytime */
65 volatile int __kmp_init_serial = FALSE;
66 volatile int __kmp_init_gtid = FALSE;
67 volatile int __kmp_init_common = FALSE;
68 volatile int __kmp_init_middle = FALSE;
69 volatile int __kmp_init_parallel = FALSE;
70 volatile int __kmp_init_monitor = 0; /* 1 - launched, 2 - actually started (Windows* OS only) */
71 volatile int __kmp_init_user_locks = FALSE;
72 
73 /* list of address of allocated caches for commons */
74 kmp_cached_addr_t *__kmp_threadpriv_cache_list = NULL;
75 
76 int __kmp_init_counter = 0;
77 int __kmp_root_counter = 0;
78 int __kmp_version = 0;
79 
80 volatile kmp_uint32 __kmp_team_counter = 0;
81 volatile kmp_uint32 __kmp_task_counter = 0;
82 
83 unsigned int __kmp_init_wait = KMP_DEFAULT_INIT_WAIT; /* initial number of spin-tests */
84 unsigned int __kmp_next_wait = KMP_DEFAULT_NEXT_WAIT; /* susequent number of spin-tests */
85 
86 size_t __kmp_stksize = KMP_DEFAULT_STKSIZE;
87 size_t __kmp_monitor_stksize = 0; // auto adjust
88 size_t __kmp_stkoffset = KMP_DEFAULT_STKOFFSET;
89 int __kmp_stkpadding = KMP_MIN_STKPADDING;
90 
91 size_t __kmp_malloc_pool_incr = KMP_DEFAULT_MALLOC_POOL_INCR;
92 
93 /* Barrier method defaults, settings, and strings */
94 /* branch factor = 2^branch_bits (only relevant for tree and hyper barrier types) */
95 #if KMP_ARCH_X86_64
96 kmp_uint32 __kmp_barrier_gather_bb_dflt = 2; /* branch_factor = 4 */ /* hyper2: C78980 */
97 kmp_uint32 __kmp_barrier_release_bb_dflt = 2; /* branch_factor = 4 */ /* hyper2: C78980 */
98 #else
99 kmp_uint32 __kmp_barrier_gather_bb_dflt = 2; /* branch_factor = 4 */ /* communication in core for MIC */
100 kmp_uint32 __kmp_barrier_release_bb_dflt = 2; /* branch_factor = 4 */ /* communication in core for MIC */
101 #endif // KMP_ARCH_X86_64
102 #if KMP_ARCH_X86_64
103 kmp_bar_pat_e __kmp_barrier_gather_pat_dflt = bp_hyper_bar; /* hyper2: C78980 */
104 kmp_bar_pat_e __kmp_barrier_release_pat_dflt = bp_hyper_bar; /* hyper2: C78980 */
105 #else
106 kmp_bar_pat_e __kmp_barrier_gather_pat_dflt = bp_linear_bar;
107 kmp_bar_pat_e __kmp_barrier_release_pat_dflt = bp_linear_bar;
108 #endif
109 kmp_uint32 __kmp_barrier_gather_branch_bits [ bs_last_barrier ] = { 0 };
110 kmp_uint32 __kmp_barrier_release_branch_bits [ bs_last_barrier ] = { 0 };
111 kmp_bar_pat_e __kmp_barrier_gather_pattern [ bs_last_barrier ] = { bp_linear_bar };
112 kmp_bar_pat_e __kmp_barrier_release_pattern [ bs_last_barrier ] = { bp_linear_bar };
113 char const *__kmp_barrier_branch_bit_env_name [ bs_last_barrier ] =
114  { "KMP_PLAIN_BARRIER", "KMP_FORKJOIN_BARRIER"
115  #if KMP_FAST_REDUCTION_BARRIER
116  , "KMP_REDUCTION_BARRIER"
117  #endif // KMP_FAST_REDUCTION_BARRIER
118  };
119 char const *__kmp_barrier_pattern_env_name [ bs_last_barrier ] =
120  { "KMP_PLAIN_BARRIER_PATTERN", "KMP_FORKJOIN_BARRIER_PATTERN"
121  #if KMP_FAST_REDUCTION_BARRIER
122  , "KMP_REDUCTION_BARRIER_PATTERN"
123  #endif // KMP_FAST_REDUCTION_BARRIER
124  };
125 char const *__kmp_barrier_type_name [ bs_last_barrier ] =
126  { "plain", "forkjoin"
127  #if KMP_FAST_REDUCTION_BARRIER
128  , "reduction"
129  #endif // KMP_FAST_REDUCTION_BARRIER
130  };
131 char const *__kmp_barrier_pattern_name [ bp_last_bar ] = { "linear", "tree", "hyper", "hierarchical" };
132 
133 
134 int __kmp_allThreadsSpecified = 0;
135 size_t __kmp_align_alloc = CACHE_LINE;
136 
137 
138 int __kmp_generate_warnings = kmp_warnings_low;
139 int __kmp_reserve_warn = 0;
140 int __kmp_xproc = 0;
141 int __kmp_avail_proc = 0;
142 size_t __kmp_sys_min_stksize = KMP_MIN_STKSIZE;
143 int __kmp_sys_max_nth = KMP_MAX_NTH;
144 int __kmp_max_nth = 0;
145 int __kmp_threads_capacity = 0;
146 int __kmp_dflt_team_nth = 0;
147 int __kmp_dflt_team_nth_ub = 0;
148 int __kmp_tp_capacity = 0;
149 int __kmp_tp_cached = 0;
150 int __kmp_dflt_nested = FALSE;
151 int __kmp_dflt_max_active_levels = KMP_MAX_ACTIVE_LEVELS_LIMIT; /* max_active_levels limit */
152 #if KMP_NESTED_HOT_TEAMS
153 int __kmp_hot_teams_mode = 0; /* 0 - free extra threads when reduced */
154  /* 1 - keep extra threads when reduced */
155 int __kmp_hot_teams_max_level = 1; /* nesting level of hot teams */
156 #endif
157 enum library_type __kmp_library = library_none;
158 enum sched_type __kmp_sched = kmp_sch_default; /* scheduling method for runtime scheduling */
159 enum sched_type __kmp_static = kmp_sch_static_greedy; /* default static scheduling method */
160 enum sched_type __kmp_guided = kmp_sch_guided_iterative_chunked; /* default guided scheduling method */
161 enum sched_type __kmp_auto = kmp_sch_guided_analytical_chunked; /* default auto scheduling method */
162 int __kmp_dflt_blocktime = KMP_DEFAULT_BLOCKTIME;
163 int __kmp_monitor_wakeups = KMP_MIN_MONITOR_WAKEUPS;
164 int __kmp_bt_intervals = KMP_INTERVALS_FROM_BLOCKTIME( KMP_DEFAULT_BLOCKTIME, KMP_MIN_MONITOR_WAKEUPS );
165 #ifdef KMP_ADJUST_BLOCKTIME
166 int __kmp_zero_bt = FALSE;
167 #endif /* KMP_ADJUST_BLOCKTIME */
168 int __kmp_ht_capable = FALSE;
169 int __kmp_ht_enabled = FALSE;
170 int __kmp_ht_log_per_phy = 1;
171 int __kmp_ncores = 0;
172 int __kmp_chunk = 0;
173 int __kmp_abort_delay = 0;
174 #if KMP_OS_LINUX && defined(KMP_TDATA_GTID)
175 int __kmp_gtid_mode = 3; /* use __declspec(thread) TLS to store gtid */
176 int __kmp_adjust_gtid_mode = FALSE;
177 #elif KMP_OS_WINDOWS
178 int __kmp_gtid_mode = 2; /* use TLS functions to store gtid */
179 int __kmp_adjust_gtid_mode = FALSE;
180 #else
181 int __kmp_gtid_mode = 0; /* select method to get gtid based on #threads */
182 int __kmp_adjust_gtid_mode = TRUE;
183 #endif /* KMP_OS_LINUX && defined(KMP_TDATA_GTID) */
184 #ifdef KMP_TDATA_GTID
185 #if KMP_OS_WINDOWS
186 __declspec(thread) int __kmp_gtid = KMP_GTID_DNE;
187 #else
188 __thread int __kmp_gtid = KMP_GTID_DNE;
189 #endif /* KMP_OS_WINDOWS - workaround because Intel(R) Many Integrated Core compiler 20110316 doesn't accept __declspec */
190 #endif /* KMP_TDATA_GTID */
191 int __kmp_tls_gtid_min = INT_MAX;
192 int __kmp_foreign_tp = TRUE;
193 #if KMP_ARCH_X86 || KMP_ARCH_X86_64
194 int __kmp_inherit_fp_control = TRUE;
195 kmp_int16 __kmp_init_x87_fpu_control_word = 0;
196 kmp_uint32 __kmp_init_mxcsr = 0;
197 #endif /* KMP_ARCH_X86 || KMP_ARCH_X86_64 */
198 
199 #ifdef USE_LOAD_BALANCE
200 double __kmp_load_balance_interval = 1.0;
201 #endif /* USE_LOAD_BALANCE */
202 
203 kmp_nested_nthreads_t __kmp_nested_nth = { NULL, 0, 0 };
204 
205 #if KMP_USE_ADAPTIVE_LOCKS
206 
207 kmp_adaptive_backoff_params_t __kmp_adaptive_backoff_params = { 1, 1024 }; // TODO: tune it!
208 
209 #if KMP_DEBUG_ADAPTIVE_LOCKS
210 char * __kmp_speculative_statsfile = "-";
211 #endif
212 
213 #endif // KMP_USE_ADAPTIVE_LOCKS
214 
215 #if OMP_40_ENABLED
216 int __kmp_display_env = FALSE;
217 int __kmp_display_env_verbose = FALSE;
218 int __kmp_omp_cancellation = FALSE;
219 #endif
220 
221 /* map OMP 3.0 schedule types with our internal schedule types */
222 enum sched_type __kmp_sch_map[ kmp_sched_upper - kmp_sched_lower_ext + kmp_sched_upper_std - kmp_sched_lower - 2 ] = {
223  kmp_sch_static_chunked, // ==> kmp_sched_static = 1
224  kmp_sch_dynamic_chunked, // ==> kmp_sched_dynamic = 2
225  kmp_sch_guided_chunked, // ==> kmp_sched_guided = 3
226  kmp_sch_auto, // ==> kmp_sched_auto = 4
227  kmp_sch_trapezoidal // ==> kmp_sched_trapezoidal = 101
228  // will likely not used, introduced here just to debug the code
229  // of public intel extension schedules
230 };
231 
232 #if KMP_OS_LINUX
233 enum clock_function_type __kmp_clock_function;
234 int __kmp_clock_function_param;
235 #endif /* KMP_OS_LINUX */
236 
237 #if KMP_AFFINITY_SUPPORTED
238 
239 # if KMP_OS_WINDOWS && KMP_ARCH_X86_64
240 
241 int __kmp_num_proc_groups = 1;
242 
243 kmp_GetActiveProcessorCount_t __kmp_GetActiveProcessorCount = NULL;
244 kmp_GetActiveProcessorGroupCount_t __kmp_GetActiveProcessorGroupCount = NULL;
245 kmp_GetThreadGroupAffinity_t __kmp_GetThreadGroupAffinity = NULL;
246 kmp_SetThreadGroupAffinity_t __kmp_SetThreadGroupAffinity = NULL;
247 
248 # endif /* KMP_OS_WINDOWS && KMP_ARCH_X86_64 */
249 
250 size_t __kmp_affin_mask_size = 0;
251 enum affinity_type __kmp_affinity_type = affinity_default;
252 enum affinity_gran __kmp_affinity_gran = affinity_gran_default;
253 int __kmp_affinity_gran_levels = -1;
254 int __kmp_affinity_dups = TRUE;
255 enum affinity_top_method __kmp_affinity_top_method = affinity_top_method_default;
256 int __kmp_affinity_compact = 0;
257 int __kmp_affinity_offset = 0;
258 int __kmp_affinity_verbose = FALSE;
259 int __kmp_affinity_warnings = TRUE;
260 int __kmp_affinity_respect_mask = affinity_respect_mask_default;
261 char * __kmp_affinity_proclist = NULL;
262 kmp_affin_mask_t *__kmp_affinity_masks = NULL;
263 unsigned __kmp_affinity_num_masks = 0;
264 
265 char const * __kmp_cpuinfo_file = NULL;
266 
267 #endif /* KMP_AFFINITY_SUPPORTED */
268 
269 #if OMP_40_ENABLED
270 kmp_nested_proc_bind_t __kmp_nested_proc_bind = { NULL, 0, 0 };
271 int __kmp_affinity_num_places = 0;
272 #endif
273 
274 #if KMP_MIC
275 unsigned int __kmp_place_num_cores = 0;
276 unsigned int __kmp_place_num_threads_per_core = 0;
277 unsigned int __kmp_place_core_offset = 0;
278 #endif
279 
280 kmp_tasking_mode_t __kmp_tasking_mode = tskm_task_teams;
281 
282 /* This check ensures that the compiler is passing the correct data type
283  * for the flags formal parameter of the function kmpc_omp_task_alloc().
284  * If the type is not a 4-byte type, then give an error message about
285  * a non-positive length array pointing here. If that happens, the
286  * kmp_tasking_flags_t structure must be redefined to have exactly 32 bits.
287  */
288 KMP_BUILD_ASSERT( sizeof(kmp_tasking_flags_t) == 4 );
289 
290 kmp_int32 __kmp_task_stealing_constraint = 1; /* Constrain task stealing by default */
291 
292 #ifdef DEBUG_SUSPEND
293 int __kmp_suspend_count = 0;
294 #endif
295 
296 int __kmp_settings = FALSE;
297 int __kmp_duplicate_library_ok = 0;
298 #if USE_ITT_BUILD
299 int __kmp_forkjoin_frames = 1;
300 int __kmp_forkjoin_frames_mode = 0;
301 #endif
302 PACKED_REDUCTION_METHOD_T __kmp_force_reduction_method = reduction_method_not_defined;
303 int __kmp_determ_red = FALSE;
304 
305 #ifdef KMP_DEBUG
306 int kmp_a_debug = 0;
307 int kmp_b_debug = 0;
308 int kmp_c_debug = 0;
309 int kmp_d_debug = 0;
310 int kmp_e_debug = 0;
311 int kmp_f_debug = 0;
312 int kmp_diag = 0;
313 #endif
314 
315 /* For debug information logging using rotating buffer */
316 int __kmp_debug_buf = FALSE; /* TRUE means use buffer, FALSE means print to stderr */
317 int __kmp_debug_buf_lines = KMP_DEBUG_BUF_LINES_INIT; /* Lines of debug stored in buffer */
318 int __kmp_debug_buf_chars = KMP_DEBUG_BUF_CHARS_INIT; /* Characters allowed per line in buffer */
319 int __kmp_debug_buf_atomic = FALSE; /* TRUE means use atomic update of buffer entry pointer */
320 
321 char *__kmp_debug_buffer = NULL; /* Debug buffer itself */
322 int __kmp_debug_count = 0; /* Counter for number of lines printed in buffer so far */
323 int __kmp_debug_buf_warn_chars = 0; /* Keep track of char increase recommended in warnings */
324 /* end rotating debug buffer */
325 
326 #ifdef KMP_DEBUG
327 int __kmp_par_range; /* +1 => only go par for constructs in range */
328  /* -1 => only go par for constructs outside range */
329 char __kmp_par_range_routine[KMP_PAR_RANGE_ROUTINE_LEN] = { '\0' };
330 char __kmp_par_range_filename[KMP_PAR_RANGE_FILENAME_LEN] = { '\0' };
331 int __kmp_par_range_lb = 0;
332 int __kmp_par_range_ub = INT_MAX;
333 #endif /* KMP_DEBUG */
334 
335 /* For printing out dynamic storage map for threads and teams */
336 int __kmp_storage_map = FALSE; /* True means print storage map for threads and teams */
337 int __kmp_storage_map_verbose = FALSE; /* True means storage map includes placement info */
338 int __kmp_storage_map_verbose_specified = FALSE;
339 /* Initialize the library data structures when we fork a child process, defaults to TRUE */
340 int __kmp_need_register_atfork = TRUE; /* At initialization, call pthread_atfork to install fork handler */
341 int __kmp_need_register_atfork_specified = TRUE;
342 
343 
344 int __kmp_env_chunk = FALSE; /* KMP_CHUNK specified? */
345 int __kmp_env_stksize = FALSE; /* KMP_STACKSIZE specified? */
346 int __kmp_env_omp_stksize = FALSE; /* OMP_STACKSIZE specified? */
347 int __kmp_env_all_threads = FALSE;/* KMP_ALL_THREADS or KMP_MAX_THREADS specified? */
348 int __kmp_env_omp_all_threads = FALSE;/* OMP_THREAD_LIMIT specified? */
349 int __kmp_env_blocktime = FALSE; /* KMP_BLOCKTIME specified? */
350 int __kmp_env_checks = FALSE; /* KMP_CHECKS specified? */
351 int __kmp_env_consistency_check = FALSE; /* KMP_CONSISTENCY_CHECK specified? */
352 
353 kmp_uint32 __kmp_yield_init = KMP_INIT_WAIT;
354 kmp_uint32 __kmp_yield_next = KMP_NEXT_WAIT;
355 kmp_uint32 __kmp_yielding_on = 1;
356 #if KMP_OS_CNK
357 kmp_uint32 __kmp_yield_cycle = 0;
358 #else
359 kmp_uint32 __kmp_yield_cycle = 1; /* Yield-cycle is on by default */
360 #endif
361 kmp_int32 __kmp_yield_on_count = 10; /* By default, yielding is on for 10 monitor periods. */
362 kmp_int32 __kmp_yield_off_count = 1; /* By default, yielding is off for 1 monitor periods. */
363 /* ----------------------------------------------------- */
364 
365 
366 /* ------------------------------------------------------ */
367 /* STATE mostly syncronized with global lock */
368 /* data written to rarely by masters, read often by workers */
369 /*
370  * SHALL WE EDIT THE COMMENT BELOW IN SOME WAY?
371  * TODO: None of this global padding stuff works consistently because
372  * the order of declaration is not necessarily correlated to storage order.
373  * To fix this, all the important globals must be put in a big structure
374  * instead.
375  */
376 KMP_ALIGN_CACHE
377  kmp_info_t **__kmp_threads = NULL;
378  kmp_root_t **__kmp_root = NULL;
379 
380 /* data read/written to often by masters */
381 KMP_ALIGN_CACHE
382 volatile int __kmp_nth = 0;
383 volatile int __kmp_all_nth = 0;
384 int __kmp_thread_pool_nth = 0;
385 volatile kmp_info_t *__kmp_thread_pool = NULL;
386 volatile kmp_team_t *__kmp_team_pool = NULL;
387 
388 KMP_ALIGN_CACHE
389 volatile int __kmp_thread_pool_active_nth = 0;
390 
391 /* -------------------------------------------------
392  * GLOBAL/ROOT STATE */
393 KMP_ALIGN_CACHE
394 kmp_global_t __kmp_global = {{ 0 }};
395 
396 /* ----------------------------------------------- */
397 /* GLOBAL SYNCHRONIZATION LOCKS */
398 /* TODO verify the need for these locks and if they need to be global */
399 
400 #if KMP_USE_INTERNODE_ALIGNMENT
401 /* Multinode systems have larger cache line granularity which can cause
402  * false sharing if the alignment is not large enough for these locks */
403 KMP_ALIGN_CACHE_INTERNODE
404 
405 kmp_bootstrap_lock_t __kmp_initz_lock = KMP_BOOTSTRAP_LOCK_INITIALIZER( __kmp_initz_lock ); /* Control initializations */
406 KMP_ALIGN_CACHE_INTERNODE
407 kmp_bootstrap_lock_t __kmp_forkjoin_lock; /* control fork/join access */
408 KMP_ALIGN_CACHE_INTERNODE
409 kmp_bootstrap_lock_t __kmp_exit_lock; /* exit() is not always thread-safe */
410 KMP_ALIGN_CACHE_INTERNODE
411 kmp_bootstrap_lock_t __kmp_monitor_lock; /* control monitor thread creation */
412 KMP_ALIGN_CACHE_INTERNODE
413 kmp_bootstrap_lock_t __kmp_tp_cached_lock; /* used for the hack to allow threadprivate cache and __kmp_threads expansion to co-exist */
414 
415 KMP_ALIGN_CACHE_INTERNODE
416 kmp_lock_t __kmp_global_lock; /* Control OS/global access */
417 KMP_ALIGN_CACHE_INTERNODE
418 kmp_queuing_lock_t __kmp_dispatch_lock; /* Control dispatch access */
419 KMP_ALIGN_CACHE_INTERNODE
420 kmp_lock_t __kmp_debug_lock; /* Control I/O access for KMP_DEBUG */
421 #else
422 KMP_ALIGN_CACHE
423 
424 kmp_bootstrap_lock_t __kmp_initz_lock = KMP_BOOTSTRAP_LOCK_INITIALIZER( __kmp_initz_lock ); /* Control initializations */
425 kmp_bootstrap_lock_t __kmp_forkjoin_lock; /* control fork/join access */
426 kmp_bootstrap_lock_t __kmp_exit_lock; /* exit() is not always thread-safe */
427 kmp_bootstrap_lock_t __kmp_monitor_lock; /* control monitor thread creation */
428 kmp_bootstrap_lock_t __kmp_tp_cached_lock; /* used for the hack to allow threadprivate cache and __kmp_threads expansion to co-exist */
429 
430 KMP_ALIGN(128)
431 kmp_lock_t __kmp_global_lock; /* Control OS/global access */
432 KMP_ALIGN(128)
433 kmp_queuing_lock_t __kmp_dispatch_lock; /* Control dispatch access */
434 KMP_ALIGN(128)
435 kmp_lock_t __kmp_debug_lock; /* Control I/O access for KMP_DEBUG */
436 #endif
437 
438 /* ----------------------------------------------- */
439 
440 #if KMP_HANDLE_SIGNALS
441  /*
442  Signal handling is disabled by default, because it confuses users: In case of sigsegv
443  (or other trouble) in user code signal handler catches the signal, which then "appears" in
444  the monitor thread (when the monitor executes raise() function). Users see signal in the
445  monitor thread and blame OpenMP RTL.
446 
447  Grant said signal handling required on some older OSes (Irix?) supported by KAI, because
448  bad applications hung but not aborted. Currently it is not a problem for Linux* OS, OS X* and
449  Windows* OS.
450 
451  Grant: Found new hangs for EL4, EL5, and a Fedora Core machine. So I'm putting
452  the default back for now to see if that fixes hangs on those machines.
453 
454  2010-04013 Lev: It was a bug in Fortran RTL. Fortran RTL prints a kind of stack backtrace
455  when program is aborting, but the code is not signal-safe. When multiple signals raised at
456  the same time (which occurs in dynamic negative tests because all the worker threads detects
457  the same error), Fortran RTL may hang. The bug finally fixed in Fortran RTL library provided
458  by Steve R., and will be available soon.
459  */
460  int __kmp_handle_signals = FALSE;
461 #endif
462 
463 /* ----------------------------------------------- */
464 #ifdef BUILD_TV
465 kmp_key_t __kmp_tv_key = 0;
466 #endif
467 
468 /* ------------------------------------------------------------------------ */
469 /* ------------------------------------------------------------------------ */
470 
471 #ifdef DEBUG_SUSPEND
472 int
473 get_suspend_count_( void ) {
474  int count = __kmp_suspend_count;
475  __kmp_suspend_count = 0;
476  return count;
477 }
478 void
479 set_suspend_count_( int * value ) {
480  __kmp_suspend_count = *value;
481 }
482 #endif
483 
484 // Symbols for MS mutual detection.
485 int _You_must_link_with_exactly_one_OpenMP_library = 1;
486 int _You_must_link_with_Intel_OpenMP_library = 1;
487 #if KMP_OS_WINDOWS && ( KMP_VERSION_MAJOR > 4 )
488  int _You_must_link_with_Microsoft_OpenMP_library = 1;
489 #endif
490 
491 // end of file //
sched_type
Definition: kmp.h:320