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77 lines
2.3 KiB
C++
77 lines
2.3 KiB
C++
//===--- ThreadLocalStorage.cpp -------------------------------------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2018 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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#include <cstring>
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#include "../SwiftShims/ThreadLocalStorage.h"
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#include "../runtime/ThreadLocalStorage.h"
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#include "swift/Basic/Lazy.h"
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#include "swift/Runtime/Debug.h"
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SWIFT_CC(swift) SWIFT_RUNTIME_STDLIB_API
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void _stdlib_destroyTLS(void *);
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SWIFT_CC(swift) SWIFT_RUNTIME_STDLIB_API
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void *_stdlib_createTLS(void);
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#if SWIFT_TLS_HAS_RESERVED_PTHREAD_SPECIFIC
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SWIFT_RUNTIME_STDLIB_INTERNAL
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void *
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_swift_stdlib_threadLocalStorageGet(void) {
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void *value = SWIFT_THREAD_GETSPECIFIC(SWIFT_STDLIB_TLS_KEY);
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if (value)
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return value;
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static swift::OnceToken_t token;
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SWIFT_ONCE_F(token, [](void *) {
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int result = pthread_key_init_np(SWIFT_STDLIB_TLS_KEY, [](void *pointer) {
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_stdlib_destroyTLS(pointer);
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});
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if (result != 0)
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swift::fatalError(0, "couldn't create pthread key for stdlib TLS: %s\n",
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std::strerror(result));
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}, nullptr);
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value = _stdlib_createTLS();
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SWIFT_THREAD_SETSPECIFIC(SWIFT_STDLIB_TLS_KEY, value);
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return value;
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}
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#else
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SWIFT_RUNTIME_STDLIB_INTERNAL
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void *
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_swift_stdlib_threadLocalStorageGet(void) {
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static swift::OnceToken_t token;
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static pthread_key_t key;
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SWIFT_ONCE_F(token, [](void *) {
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int result = SWIFT_THREAD_KEY_CREATE(&key, [](void *pointer) {
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_stdlib_destroyTLS(pointer);
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});
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if (result != 0)
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swift::fatalError(0, "couldn't create pthread key for stdlib TLS: %s\n",
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std::strerror(result));
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}, nullptr);
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void *value = SWIFT_THREAD_GETSPECIFIC(key);
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if (!value) {
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value = _stdlib_createTLS();
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int result = SWIFT_THREAD_SETSPECIFIC(key, value);
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if (result != 0)
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swift::fatalError(0, "pthread_setspecific failed: %s\n",
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std::strerror(result));
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}
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return value;
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}
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#endif
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