Tim Yao | 72bc0fb | 2019-12-03 11:04:19 -0800 | [diff] [blame] | 1 | /* |
| 2 | ** Copyright (C) 2007, The Android Open Source Project |
| 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 | #include <cutils/threads.h> |
| 18 | |
| 19 | // For gettid. |
| 20 | #if defined(__APPLE__) |
| 21 | #include "AvailabilityMacros.h" // For MAC_OS_X_VERSION_MAX_ALLOWED |
| 22 | #include <stdint.h> |
| 23 | #include <stdlib.h> |
| 24 | #include <sys/syscall.h> |
| 25 | #include <sys/time.h> |
| 26 | #include <unistd.h> |
| 27 | #elif defined(__linux__) && !defined(__ANDROID__) |
| 28 | #include <syscall.h> |
| 29 | #include <unistd.h> |
| 30 | #elif defined(_WIN32) |
| 31 | #include <windows.h> |
| 32 | #endif |
| 33 | |
| 34 | // No definition needed for Android because we'll just pick up bionic's copy. |
Blance Tang | 3dce4f8 | 2020-11-27 23:11:12 +0800 | [diff] [blame] | 35 | #if !defined(__ANDROID__) || !defined(__GLIBC__) || __GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ < 30) |
Tim Yao | 72bc0fb | 2019-12-03 11:04:19 -0800 | [diff] [blame] | 36 | pid_t gettid() { |
| 37 | #if defined(__APPLE__) |
| 38 | uint64_t tid; |
| 39 | pthread_threadid_np(NULL, &tid); |
| 40 | return tid; |
| 41 | #elif defined(__linux__) |
| 42 | return syscall(__NR_gettid); |
| 43 | #elif defined(_WIN32) |
| 44 | return GetCurrentThreadId(); |
| 45 | #endif |
| 46 | } |
| 47 | #endif // __ANDROID__ |
| 48 | |
| 49 | #if !defined(_WIN32) |
| 50 | |
| 51 | void* thread_store_get( thread_store_t* store ) |
| 52 | { |
yuliang.hu | 3e3ab24 | 2024-07-29 14:52:31 +0800 | [diff] [blame^] | 53 | /*coverity[missing_lock]: Used for conditional judgment, no lock is required*/ |
Tim Yao | 72bc0fb | 2019-12-03 11:04:19 -0800 | [diff] [blame] | 54 | if (!store->has_tls) |
| 55 | return NULL; |
| 56 | |
| 57 | return pthread_getspecific( store->tls ); |
| 58 | } |
| 59 | |
| 60 | extern void thread_store_set( thread_store_t* store, |
| 61 | void* value, |
| 62 | thread_store_destruct_t destroy) |
| 63 | { |
| 64 | pthread_mutex_lock( &store->lock ); |
| 65 | if (!store->has_tls) { |
| 66 | if (pthread_key_create( &store->tls, destroy) != 0) { |
| 67 | pthread_mutex_unlock(&store->lock); |
| 68 | return; |
| 69 | } |
| 70 | store->has_tls = 1; |
| 71 | } |
| 72 | pthread_mutex_unlock( &store->lock ); |
| 73 | |
| 74 | pthread_setspecific( store->tls, value ); |
| 75 | } |
| 76 | |
| 77 | #else /* !defined(_WIN32) */ |
| 78 | void* thread_store_get( thread_store_t* store ) |
| 79 | { |
| 80 | if (!store->has_tls) |
| 81 | return NULL; |
| 82 | |
| 83 | return (void*) TlsGetValue( store->tls ); |
| 84 | } |
| 85 | |
| 86 | void thread_store_set( thread_store_t* store, |
| 87 | void* value, |
| 88 | thread_store_destruct_t /*destroy*/ ) |
| 89 | { |
| 90 | /* XXX: can't use destructor on thread exit */ |
| 91 | if (!store->lock_init) { |
| 92 | store->lock_init = -1; |
| 93 | InitializeCriticalSection( &store->lock ); |
| 94 | store->lock_init = -2; |
| 95 | } else while (store->lock_init != -2) { |
| 96 | Sleep(10); /* 10ms */ |
| 97 | } |
| 98 | |
| 99 | EnterCriticalSection( &store->lock ); |
| 100 | if (!store->has_tls) { |
| 101 | store->tls = TlsAlloc(); |
| 102 | if (store->tls == TLS_OUT_OF_INDEXES) { |
| 103 | LeaveCriticalSection( &store->lock ); |
| 104 | return; |
| 105 | } |
| 106 | store->has_tls = 1; |
| 107 | } |
| 108 | LeaveCriticalSection( &store->lock ); |
| 109 | |
| 110 | TlsSetValue( store->tls, value ); |
| 111 | } |
| 112 | #endif /* !defined(_WIN32) */ |