1 /* 2 * ompt-general.cpp -- OMPT implementation of interface functions 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 /***************************************************************************** 14 * system include files 15 ****************************************************************************/ 16 17 #include <assert.h> 18 19 #include <stdint.h> 20 #include <stdio.h> 21 #include <stdlib.h> 22 #include <string.h> 23 #if KMP_OS_UNIX 24 #include <dlfcn.h> 25 #endif 26 27 /***************************************************************************** 28 * ompt include files 29 ****************************************************************************/ 30 31 #include "ompt-specific.cpp" 32 33 /***************************************************************************** 34 * macros 35 ****************************************************************************/ 36 37 #define ompt_get_callback_success 1 38 #define ompt_get_callback_failure 0 39 40 #define no_tool_present 0 41 42 #define OMPT_API_ROUTINE static 43 44 #ifndef OMPT_STR_MATCH 45 #define OMPT_STR_MATCH(haystack, needle) (!strcasecmp(haystack, needle)) 46 #endif 47 48 /***************************************************************************** 49 * types 50 ****************************************************************************/ 51 52 typedef struct { 53 const char *state_name; 54 ompt_state_t state_id; 55 } ompt_state_info_t; 56 57 typedef struct { 58 const char *name; 59 kmp_mutex_impl_t id; 60 } kmp_mutex_impl_info_t; 61 62 enum tool_setting_e { 63 omp_tool_error, 64 omp_tool_unset, 65 omp_tool_disabled, 66 omp_tool_enabled 67 }; 68 69 /***************************************************************************** 70 * global variables 71 ****************************************************************************/ 72 73 ompt_callbacks_active_t ompt_enabled; 74 75 ompt_state_info_t ompt_state_info[] = { 76 #define ompt_state_macro(state, code) {#state, state}, 77 FOREACH_OMPT_STATE(ompt_state_macro) 78 #undef ompt_state_macro 79 }; 80 81 kmp_mutex_impl_info_t kmp_mutex_impl_info[] = { 82 #define kmp_mutex_impl_macro(name, id) {#name, name}, 83 FOREACH_KMP_MUTEX_IMPL(kmp_mutex_impl_macro) 84 #undef kmp_mutex_impl_macro 85 }; 86 87 ompt_callbacks_internal_t ompt_callbacks; 88 89 static ompt_start_tool_result_t *ompt_start_tool_result = NULL; 90 91 /***************************************************************************** 92 * forward declarations 93 ****************************************************************************/ 94 95 static ompt_interface_fn_t ompt_fn_lookup(const char *s); 96 97 OMPT_API_ROUTINE ompt_data_t *ompt_get_thread_data(void); 98 99 /***************************************************************************** 100 * initialization and finalization (private operations) 101 ****************************************************************************/ 102 103 typedef ompt_start_tool_result_t *(*ompt_start_tool_t)(unsigned int, 104 const char *); 105 106 #if KMP_OS_DARWIN 107 108 // While Darwin supports weak symbols, the library that wishes to provide a new 109 // implementation has to link against this runtime which defeats the purpose 110 // of having tools that are agnostic of the underlying runtime implementation. 111 // 112 // Fortunately, the linker includes all symbols of an executable in the global 113 // symbol table by default so dlsym() even finds static implementations of 114 // ompt_start_tool. For this to work on Linux, -Wl,--export-dynamic needs to be 115 // passed when building the application which we don't want to rely on. 116 117 static ompt_start_tool_result_t *ompt_tool_darwin(unsigned int omp_version, 118 const char *runtime_version) { 119 ompt_start_tool_result_t *ret = NULL; 120 // Search symbol in the current address space. 121 ompt_start_tool_t start_tool = 122 (ompt_start_tool_t)dlsym(RTLD_DEFAULT, "ompt_start_tool"); 123 if (start_tool) { 124 ret = start_tool(omp_version, runtime_version); 125 } 126 return ret; 127 } 128 129 #elif OMPT_HAVE_WEAK_ATTRIBUTE 130 131 // On Unix-like systems that support weak symbols the following implementation 132 // of ompt_start_tool() will be used in case no tool-supplied implementation of 133 // this function is present in the address space of a process. 134 135 _OMP_EXTERN OMPT_WEAK_ATTRIBUTE ompt_start_tool_result_t * 136 ompt_start_tool(unsigned int omp_version, const char *runtime_version) { 137 ompt_start_tool_result_t *ret = NULL; 138 // Search next symbol in the current address space. This can happen if the 139 // runtime library is linked before the tool. Since glibc 2.2 strong symbols 140 // don't override weak symbols that have been found before unless the user 141 // sets the environment variable LD_DYNAMIC_WEAK. 142 ompt_start_tool_t next_tool = 143 (ompt_start_tool_t)dlsym(RTLD_NEXT, "ompt_start_tool"); 144 if (next_tool) { 145 ret = next_tool(omp_version, runtime_version); 146 } 147 return ret; 148 } 149 150 #elif OMPT_HAVE_PSAPI 151 152 // On Windows, the ompt_tool_windows function is used to find the 153 // ompt_start_tool symbol across all modules loaded by a process. If 154 // ompt_start_tool is found, ompt_start_tool's return value is used to 155 // initialize the tool. Otherwise, NULL is returned and OMPT won't be enabled. 156 157 #include <psapi.h> 158 #pragma comment(lib, "psapi.lib") 159 160 // The number of loaded modules to start enumeration with EnumProcessModules() 161 #define NUM_MODULES 128 162 163 static ompt_start_tool_result_t * 164 ompt_tool_windows(unsigned int omp_version, const char *runtime_version) { 165 int i; 166 DWORD needed, new_size; 167 HMODULE *modules; 168 HANDLE process = GetCurrentProcess(); 169 modules = (HMODULE *)malloc(NUM_MODULES * sizeof(HMODULE)); 170 ompt_start_tool_t ompt_tool_p = NULL; 171 172 #if OMPT_DEBUG 173 printf("ompt_tool_windows(): looking for ompt_start_tool\n"); 174 #endif 175 if (!EnumProcessModules(process, modules, NUM_MODULES * sizeof(HMODULE), 176 &needed)) { 177 // Regardless of the error reason use the stub initialization function 178 free(modules); 179 return NULL; 180 } 181 // Check if NUM_MODULES is enough to list all modules 182 new_size = needed / sizeof(HMODULE); 183 if (new_size > NUM_MODULES) { 184 #if OMPT_DEBUG 185 printf("ompt_tool_windows(): resize buffer to %d bytes\n", needed); 186 #endif 187 modules = (HMODULE *)realloc(modules, needed); 188 // If resizing failed use the stub function. 189 if (!EnumProcessModules(process, modules, needed, &needed)) { 190 free(modules); 191 return NULL; 192 } 193 } 194 for (i = 0; i < new_size; ++i) { 195 (FARPROC &)ompt_tool_p = GetProcAddress(modules[i], "ompt_start_tool"); 196 if (ompt_tool_p) { 197 #if OMPT_DEBUG 198 TCHAR modName[MAX_PATH]; 199 if (GetModuleFileName(modules[i], modName, MAX_PATH)) 200 printf("ompt_tool_windows(): ompt_start_tool found in module %s\n", 201 modName); 202 #endif 203 free(modules); 204 return (*ompt_tool_p)(omp_version, runtime_version); 205 } 206 #if OMPT_DEBUG 207 else { 208 TCHAR modName[MAX_PATH]; 209 if (GetModuleFileName(modules[i], modName, MAX_PATH)) 210 printf("ompt_tool_windows(): ompt_start_tool not found in module %s\n", 211 modName); 212 } 213 #endif 214 } 215 free(modules); 216 return NULL; 217 } 218 #else 219 #error Activation of OMPT is not supported on this platform. 220 #endif 221 222 static ompt_start_tool_result_t * 223 ompt_try_start_tool(unsigned int omp_version, const char *runtime_version) { 224 ompt_start_tool_result_t *ret = NULL; 225 ompt_start_tool_t start_tool = NULL; 226 #if KMP_OS_WINDOWS 227 // Cannot use colon to describe a list of absolute paths on Windows 228 const char *sep = ";"; 229 #else 230 const char *sep = ":"; 231 #endif 232 233 #if KMP_OS_DARWIN 234 // Try in the current address space 235 ret = ompt_tool_darwin(omp_version, runtime_version); 236 #elif OMPT_HAVE_WEAK_ATTRIBUTE 237 ret = ompt_start_tool(omp_version, runtime_version); 238 #elif OMPT_HAVE_PSAPI 239 ret = ompt_tool_windows(omp_version, runtime_version); 240 #else 241 #error Activation of OMPT is not supported on this platform. 242 #endif 243 if (ret) 244 return ret; 245 246 // Try tool-libraries-var ICV 247 const char *tool_libs = getenv("OMP_TOOL_LIBRARIES"); 248 if (tool_libs) { 249 char *libs = __kmp_str_format("%s", tool_libs); 250 char *buf; 251 char *fname = __kmp_str_token(libs, sep, &buf); 252 while (fname) { 253 #if KMP_OS_UNIX 254 void *h = dlopen(fname, RTLD_LAZY); 255 if (h) { 256 start_tool = (ompt_start_tool_t)dlsym(h, "ompt_start_tool"); 257 #elif KMP_OS_WINDOWS 258 HMODULE h = LoadLibrary(fname); 259 if (h) { 260 start_tool = (ompt_start_tool_t)GetProcAddress(h, "ompt_start_tool"); 261 #else 262 #error Activation of OMPT is not supported on this platform. 263 #endif 264 if (start_tool && (ret = (*start_tool)(omp_version, runtime_version))) 265 break; 266 } 267 fname = __kmp_str_token(NULL, sep, &buf); 268 } 269 __kmp_str_free(&libs); 270 } 271 return ret; 272 } 273 274 void ompt_pre_init() { 275 //-------------------------------------------------- 276 // Execute the pre-initialization logic only once. 277 //-------------------------------------------------- 278 static int ompt_pre_initialized = 0; 279 280 if (ompt_pre_initialized) 281 return; 282 283 ompt_pre_initialized = 1; 284 285 //-------------------------------------------------- 286 // Use a tool iff a tool is enabled and available. 287 //-------------------------------------------------- 288 const char *ompt_env_var = getenv("OMP_TOOL"); 289 tool_setting_e tool_setting = omp_tool_error; 290 291 if (!ompt_env_var || !strcmp(ompt_env_var, "")) 292 tool_setting = omp_tool_unset; 293 else if (OMPT_STR_MATCH(ompt_env_var, "disabled")) 294 tool_setting = omp_tool_disabled; 295 else if (OMPT_STR_MATCH(ompt_env_var, "enabled")) 296 tool_setting = omp_tool_enabled; 297 298 #if OMPT_DEBUG 299 printf("ompt_pre_init(): tool_setting = %d\n", tool_setting); 300 #endif 301 switch (tool_setting) { 302 case omp_tool_disabled: 303 break; 304 305 case omp_tool_unset: 306 case omp_tool_enabled: 307 308 //-------------------------------------------------- 309 // Load tool iff specified in environment variable 310 //-------------------------------------------------- 311 ompt_start_tool_result = 312 ompt_try_start_tool(__kmp_openmp_version, ompt_get_runtime_version()); 313 314 memset(&ompt_enabled, 0, sizeof(ompt_enabled)); 315 break; 316 317 case omp_tool_error: 318 fprintf(stderr, "Warning: OMP_TOOL has invalid value \"%s\".\n" 319 " legal values are (NULL,\"\",\"disabled\"," 320 "\"enabled\").\n", 321 ompt_env_var); 322 break; 323 } 324 #if OMPT_DEBUG 325 printf("ompt_pre_init(): ompt_enabled = %d\n", ompt_enabled); 326 #endif 327 } 328 329 extern "C" int omp_get_initial_device(void); 330 331 void ompt_post_init() { 332 //-------------------------------------------------- 333 // Execute the post-initialization logic only once. 334 //-------------------------------------------------- 335 static int ompt_post_initialized = 0; 336 337 if (ompt_post_initialized) 338 return; 339 340 ompt_post_initialized = 1; 341 342 //-------------------------------------------------- 343 // Initialize the tool if so indicated. 344 //-------------------------------------------------- 345 if (ompt_start_tool_result) { 346 ompt_enabled.enabled = !!ompt_start_tool_result->initialize( 347 ompt_fn_lookup, omp_get_initial_device(), &(ompt_start_tool_result->tool_data)); 348 349 if (!ompt_enabled.enabled) { 350 // tool not enabled, zero out the bitmap, and done 351 memset(&ompt_enabled, 0, sizeof(ompt_enabled)); 352 return; 353 } 354 355 kmp_info_t *root_thread = ompt_get_thread(); 356 357 ompt_set_thread_state(root_thread, ompt_state_overhead); 358 359 if (ompt_enabled.ompt_callback_thread_begin) { 360 ompt_callbacks.ompt_callback(ompt_callback_thread_begin)( 361 ompt_thread_initial, __ompt_get_thread_data_internal()); 362 } 363 ompt_data_t *task_data; 364 __ompt_get_task_info_internal(0, NULL, &task_data, NULL, NULL, NULL); 365 if (ompt_enabled.ompt_callback_task_create) { 366 ompt_callbacks.ompt_callback(ompt_callback_task_create)( 367 NULL, NULL, task_data, ompt_task_initial, 0, NULL); 368 } 369 370 ompt_set_thread_state(root_thread, ompt_state_work_serial); 371 } 372 } 373 374 void ompt_fini() { 375 if (ompt_enabled.enabled) { 376 ompt_start_tool_result->finalize(&(ompt_start_tool_result->tool_data)); 377 } 378 379 memset(&ompt_enabled, 0, sizeof(ompt_enabled)); 380 } 381 382 /***************************************************************************** 383 * interface operations 384 ****************************************************************************/ 385 386 /***************************************************************************** 387 * state 388 ****************************************************************************/ 389 390 OMPT_API_ROUTINE int ompt_enumerate_states(int current_state, int *next_state, 391 const char **next_state_name) { 392 const static int len = sizeof(ompt_state_info) / sizeof(ompt_state_info_t); 393 int i = 0; 394 395 for (i = 0; i < len - 1; i++) { 396 if (ompt_state_info[i].state_id == current_state) { 397 *next_state = ompt_state_info[i + 1].state_id; 398 *next_state_name = ompt_state_info[i + 1].state_name; 399 return 1; 400 } 401 } 402 403 return 0; 404 } 405 406 OMPT_API_ROUTINE int ompt_enumerate_mutex_impls(int current_impl, 407 int *next_impl, 408 const char **next_impl_name) { 409 const static int len = 410 sizeof(kmp_mutex_impl_info) / sizeof(kmp_mutex_impl_info_t); 411 int i = 0; 412 for (i = 0; i < len - 1; i++) { 413 if (kmp_mutex_impl_info[i].id != current_impl) 414 continue; 415 *next_impl = kmp_mutex_impl_info[i + 1].id; 416 *next_impl_name = kmp_mutex_impl_info[i + 1].name; 417 return 1; 418 } 419 return 0; 420 } 421 422 /***************************************************************************** 423 * callbacks 424 ****************************************************************************/ 425 426 OMPT_API_ROUTINE ompt_set_result_t ompt_set_callback(ompt_callbacks_t which, 427 ompt_callback_t callback) { 428 switch (which) { 429 430 #define ompt_event_macro(event_name, callback_type, event_id) \ 431 case event_name: \ 432 if (ompt_event_implementation_status(event_name)) { \ 433 ompt_callbacks.ompt_callback(event_name) = (callback_type)callback; \ 434 ompt_enabled.event_name = (callback != 0); \ 435 } \ 436 if (callback) \ 437 return ompt_event_implementation_status(event_name); \ 438 else \ 439 return ompt_set_always; 440 441 FOREACH_OMPT_EVENT(ompt_event_macro) 442 443 #undef ompt_event_macro 444 445 default: 446 return ompt_set_error; 447 } 448 } 449 450 OMPT_API_ROUTINE int ompt_get_callback(ompt_callbacks_t which, 451 ompt_callback_t *callback) { 452 if (!ompt_enabled.enabled) 453 return ompt_get_callback_failure; 454 455 switch (which) { 456 457 #define ompt_event_macro(event_name, callback_type, event_id) \ 458 case event_name: \ 459 if (ompt_event_implementation_status(event_name)) { \ 460 ompt_callback_t mycb = \ 461 (ompt_callback_t)ompt_callbacks.ompt_callback(event_name); \ 462 if (ompt_enabled.event_name && mycb) { \ 463 *callback = mycb; \ 464 return ompt_get_callback_success; \ 465 } \ 466 } \ 467 return ompt_get_callback_failure; 468 469 FOREACH_OMPT_EVENT(ompt_event_macro) 470 471 #undef ompt_event_macro 472 473 default: 474 return ompt_get_callback_failure; 475 } 476 } 477 478 /***************************************************************************** 479 * parallel regions 480 ****************************************************************************/ 481 482 OMPT_API_ROUTINE int ompt_get_parallel_info(int ancestor_level, 483 ompt_data_t **parallel_data, 484 int *team_size) { 485 if (!ompt_enabled.enabled) 486 return 0; 487 return __ompt_get_parallel_info_internal(ancestor_level, parallel_data, 488 team_size); 489 } 490 491 OMPT_API_ROUTINE int ompt_get_state(ompt_wait_id_t *wait_id) { 492 if (!ompt_enabled.enabled) 493 return ompt_state_work_serial; 494 int thread_state = __ompt_get_state_internal(wait_id); 495 496 if (thread_state == ompt_state_undefined) { 497 thread_state = ompt_state_work_serial; 498 } 499 500 return thread_state; 501 } 502 503 /***************************************************************************** 504 * tasks 505 ****************************************************************************/ 506 507 OMPT_API_ROUTINE ompt_data_t *ompt_get_thread_data(void) { 508 if (!ompt_enabled.enabled) 509 return NULL; 510 return __ompt_get_thread_data_internal(); 511 } 512 513 OMPT_API_ROUTINE int ompt_get_task_info(int ancestor_level, int *type, 514 ompt_data_t **task_data, 515 ompt_frame_t **task_frame, 516 ompt_data_t **parallel_data, 517 int *thread_num) { 518 if (!ompt_enabled.enabled) 519 return 0; 520 return __ompt_get_task_info_internal(ancestor_level, type, task_data, 521 task_frame, parallel_data, thread_num); 522 } 523 524 OMPT_API_ROUTINE int ompt_get_task_memory(void **addr, size_t *size, 525 int block) { 526 // stub 527 return 0; 528 } 529 530 /***************************************************************************** 531 * num_procs 532 ****************************************************************************/ 533 534 OMPT_API_ROUTINE int ompt_get_num_procs(void) { 535 // copied from kmp_ftn_entry.h (but modified: OMPT can only be called when 536 // runtime is initialized) 537 return __kmp_avail_proc; 538 } 539 540 /***************************************************************************** 541 * places 542 ****************************************************************************/ 543 544 OMPT_API_ROUTINE int ompt_get_num_places(void) { 545 // copied from kmp_ftn_entry.h (but modified) 546 #if !KMP_AFFINITY_SUPPORTED 547 return 0; 548 #else 549 if (!KMP_AFFINITY_CAPABLE()) 550 return 0; 551 return __kmp_affinity_num_masks; 552 #endif 553 } 554 555 OMPT_API_ROUTINE int ompt_get_place_proc_ids(int place_num, int ids_size, 556 int *ids) { 557 // copied from kmp_ftn_entry.h (but modified) 558 #if !KMP_AFFINITY_SUPPORTED 559 return 0; 560 #else 561 int i, count; 562 int tmp_ids[ids_size]; 563 if (!KMP_AFFINITY_CAPABLE()) 564 return 0; 565 if (place_num < 0 || place_num >= (int)__kmp_affinity_num_masks) 566 return 0; 567 /* TODO: Is this safe for asynchronous call from signal handler during runtime 568 * shutdown? */ 569 kmp_affin_mask_t *mask = KMP_CPU_INDEX(__kmp_affinity_masks, place_num); 570 count = 0; 571 KMP_CPU_SET_ITERATE(i, mask) { 572 if ((!KMP_CPU_ISSET(i, __kmp_affin_fullMask)) || 573 (!KMP_CPU_ISSET(i, mask))) { 574 continue; 575 } 576 if (count < ids_size) 577 tmp_ids[count] = i; 578 count++; 579 } 580 if (ids_size >= count) { 581 for (i = 0; i < count; i++) { 582 ids[i] = tmp_ids[i]; 583 } 584 } 585 return count; 586 #endif 587 } 588 589 OMPT_API_ROUTINE int ompt_get_place_num(void) { 590 // copied from kmp_ftn_entry.h (but modified) 591 #if !KMP_AFFINITY_SUPPORTED 592 return -1; 593 #else 594 if (!ompt_enabled.enabled || __kmp_get_gtid() < 0) 595 return -1; 596 597 int gtid; 598 kmp_info_t *thread; 599 if (!KMP_AFFINITY_CAPABLE()) 600 return -1; 601 gtid = __kmp_entry_gtid(); 602 thread = __kmp_thread_from_gtid(gtid); 603 if (thread == NULL || thread->th.th_current_place < 0) 604 return -1; 605 return thread->th.th_current_place; 606 #endif 607 } 608 609 OMPT_API_ROUTINE int ompt_get_partition_place_nums(int place_nums_size, 610 int *place_nums) { 611 // copied from kmp_ftn_entry.h (but modified) 612 #if !KMP_AFFINITY_SUPPORTED 613 return 0; 614 #else 615 if (!ompt_enabled.enabled || __kmp_get_gtid() < 0) 616 return 0; 617 618 int i, gtid, place_num, first_place, last_place, start, end; 619 kmp_info_t *thread; 620 if (!KMP_AFFINITY_CAPABLE()) 621 return 0; 622 gtid = __kmp_entry_gtid(); 623 thread = __kmp_thread_from_gtid(gtid); 624 if (thread == NULL) 625 return 0; 626 first_place = thread->th.th_first_place; 627 last_place = thread->th.th_last_place; 628 if (first_place < 0 || last_place < 0) 629 return 0; 630 if (first_place <= last_place) { 631 start = first_place; 632 end = last_place; 633 } else { 634 start = last_place; 635 end = first_place; 636 } 637 if (end - start <= place_nums_size) 638 for (i = 0, place_num = start; place_num <= end; ++place_num, ++i) { 639 place_nums[i] = place_num; 640 } 641 return end - start + 1; 642 #endif 643 } 644 645 /***************************************************************************** 646 * places 647 ****************************************************************************/ 648 649 OMPT_API_ROUTINE int ompt_get_proc_id(void) { 650 if (!ompt_enabled.enabled || __kmp_get_gtid() < 0) 651 return -1; 652 #if KMP_OS_LINUX 653 return sched_getcpu(); 654 #elif KMP_OS_WINDOWS 655 PROCESSOR_NUMBER pn; 656 GetCurrentProcessorNumberEx(&pn); 657 return 64 * pn.Group + pn.Number; 658 #else 659 return -1; 660 #endif 661 } 662 663 /***************************************************************************** 664 * compatability 665 ****************************************************************************/ 666 667 /* 668 * Currently unused function 669 OMPT_API_ROUTINE int ompt_get_ompt_version() { return OMPT_VERSION; } 670 */ 671 672 /***************************************************************************** 673 * application-facing API 674 ****************************************************************************/ 675 676 /*---------------------------------------------------------------------------- 677 | control 678 ---------------------------------------------------------------------------*/ 679 680 int __kmp_control_tool(uint64_t command, uint64_t modifier, void *arg) { 681 682 if (ompt_enabled.enabled) { 683 if (ompt_enabled.ompt_callback_control_tool) { 684 return ompt_callbacks.ompt_callback(ompt_callback_control_tool)( 685 command, modifier, arg, OMPT_LOAD_RETURN_ADDRESS(__kmp_entry_gtid())); 686 } else { 687 return -1; 688 } 689 } else { 690 return -2; 691 } 692 } 693 694 /***************************************************************************** 695 * misc 696 ****************************************************************************/ 697 698 OMPT_API_ROUTINE uint64_t ompt_get_unique_id(void) { 699 return __ompt_get_unique_id_internal(); 700 } 701 702 OMPT_API_ROUTINE void ompt_finalize_tool(void) { 703 // stub 704 } 705 706 /***************************************************************************** 707 * Target 708 ****************************************************************************/ 709 710 OMPT_API_ROUTINE int ompt_get_target_info(uint64_t *device_num, 711 ompt_id_t *target_id, 712 ompt_id_t *host_op_id) { 713 return 0; // thread is not in a target region 714 } 715 716 OMPT_API_ROUTINE int ompt_get_num_devices(void) { 717 return 1; // only one device (the current device) is available 718 } 719 720 /***************************************************************************** 721 * API inquiry for tool 722 ****************************************************************************/ 723 724 static ompt_interface_fn_t ompt_fn_lookup(const char *s) { 725 726 #define ompt_interface_fn(fn) \ 727 fn##_t fn##_f = fn; \ 728 if (strcmp(s, #fn) == 0) \ 729 return (ompt_interface_fn_t)fn##_f; 730 731 FOREACH_OMPT_INQUIRY_FN(ompt_interface_fn) 732 733 return (ompt_interface_fn_t)0; 734 } 735