1 /* 2 Copyright (c) 2005-2022 Intel Corporation 3 4 Licensed under the Apache License, Version 2.0 (the "License"); 5 you may not use this file except in compliance with the License. 6 You may obtain a copy of the License at 7 8 http://www.apache.org/licenses/LICENSE-2.0 9 10 Unless required by applicable law or agreed to in writing, software 11 distributed under the License is distributed on an "AS IS" BASIS, 12 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 See the License for the specific language governing permissions and 14 limitations under the License. 15 */ 16 17 #ifndef __TBB_test_common_tls_limit_H_ 18 #define __TBB_test_common_tls_limit_H_ 19 20 #include "config.h" 21 22 class LimitTLSKeysTo { 23 #if _WIN32 || _WIN64 24 #if __TBB_WIN8UI_SUPPORT && !defined(TLS_OUT_OF_INDEXES) 25 // for SDKs for Windows*8 Store Apps that did not redirect TLS to FLS 26 #define TlsAlloc() FlsAlloc(nullptr) 27 #define TlsFree FlsFree 28 #define TLS_OUT_OF_INDEXES FLS_OUT_OF_INDEXES 29 #endif 30 typedef DWORD handle; 31 #else // _WIN32 || _WIN64 32 typedef pthread_key_t handle; 33 #endif 34 // for platforms that not limit number of TLS keys, set artificial limit 35 static const int LIMIT = 16*1024; 36 handle handles[LIMIT]; 37 int lastUsedIdx; 38 public: LimitTLSKeysTo(int keep_keys)39 LimitTLSKeysTo(int keep_keys) { 40 for (lastUsedIdx=0; lastUsedIdx<LIMIT; lastUsedIdx++) { 41 #if _WIN32 || _WIN64 42 handle h = TlsAlloc(); 43 if (h==TLS_OUT_OF_INDEXES) 44 #else 45 int setspecific_dummy=10; 46 if (pthread_key_create(&handles[lastUsedIdx], nullptr)!=0) 47 #endif 48 { 49 break; 50 } 51 #if _WIN32 || _WIN64 52 handles[lastUsedIdx] = h; 53 #else 54 pthread_setspecific(handles[lastUsedIdx], &setspecific_dummy); 55 #endif 56 } 57 lastUsedIdx--; 58 REQUIRE_MESSAGE(lastUsedIdx >= keep_keys-1, "Less TLS keys are available than requested"); 59 for (; keep_keys>0; keep_keys--, lastUsedIdx--) { 60 #if _WIN32 || _WIN64 61 TlsFree(handles[lastUsedIdx]); 62 #else 63 int ret = pthread_key_delete(handles[lastUsedIdx]); 64 REQUIRE_MESSAGE(!ret, "Can't delete a key"); 65 #endif 66 } 67 // REMARK("%d thread local objects allocated in advance\n", lastUsedIdx+1); 68 } ~LimitTLSKeysTo()69 ~LimitTLSKeysTo() { 70 for (int i=0; i<=lastUsedIdx; i++) { 71 #if _WIN32 || _WIN64 72 TlsFree(handles[i]); 73 #else 74 int ret = pthread_key_delete(handles[i]); 75 REQUIRE_MESSAGE(!ret, "Can't delete a key"); 76 #endif 77 } 78 lastUsedIdx = 0; 79 } 80 }; 81 #endif // __TBB_test_common_tls_limit_H_ 82