mirror of
https://github.com/apple/swift.git
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1b47910cd9
Fix syntactic issues in the swift runtime build from the recent TLS changes. Move the helper definitions into the TLS stubs rather than emitting them everywhere. This allows the runtime to build again on Windows.
105 lines
3.4 KiB
C++
105 lines
3.4 KiB
C++
//===--- ThreadLocalStorage.h - Thread-local storage interface. --*- C++ -*-===//
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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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#ifndef SWIFT_RUNTIME_THREADLOCALSTORAGE_H
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#define SWIFT_RUNTIME_THREADLOCALSTORAGE_H
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#include "llvm/Support/Compiler.h"
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#include "swift/Runtime/Config.h"
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// Depending on the target, we may be able to use dedicated TSD keys or
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// thread_local variables. When dedicated TSD keys aren't available,
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// wrap the target's API for thread-local data for things that don't want
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// to use thread_local.
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// On Apple platforms, we have dedicated TSD keys.
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#if defined(__APPLE__)
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# define SWIFT_TLS_HAS_RESERVED_PTHREAD_SPECIFIC 1
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#endif
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// If we're using Clang, and Clang claims not to support thread_local,
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// it must be because we're on a platform that doesn't support it.
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#if __clang__ && !__has_feature(cxx_thread_local)
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// No thread_local.
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#else
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// Otherwise, we do have thread_local.
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# define SWIFT_TLS_HAS_THREADLOCAL 1
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static_assert(LLVM_ENABLE_THREADS, "LLVM_THREAD_LOCAL will use a global?");
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#endif
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#if SWIFT_TLS_HAS_RESERVED_PTHREAD_SPECIFIC
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// Use reserved TSD keys.
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# if __has_include(<pthread/tsd_private.h>)
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# include <pthread/tsd_private.h>
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# else
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// We still need to use the SPI for setting the destructor, so declare it here.
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extern "C" int pthread_key_init_np(int key, void (*destructor)(void *));
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# endif
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// If the keys are not available from the header, define them ourselves. The values match
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// what tsd_private.h provides.
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# ifndef __PTK_FRAMEWORK_SWIFT_KEY0
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# define __PTK_FRAMEWORK_SWIFT_KEY0 100
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# endif
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# ifndef __PTK_FRAMEWORK_SWIFT_KEY1
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# define __PTK_FRAMEWORK_SWIFT_KEY1 101
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# endif
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# define SWIFT_EXCLUSIVITY_TLS_KEY __PTK_FRAMEWORK_SWIFT_KEY0
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# define SWIFT_STDLIB_TLS_KEY __PTK_FRAMEWORK_SWIFT_KEY1
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#endif
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// If the reserved key path didn't already provide get/setspecific macros,
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// wrap the platform's APIs.
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#ifndef SWIFT_THREAD_GETSPECIFIC
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// Pick the right typedef for the key.
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# if defined(__linux__)
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# if defined(__ANDROID__)
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typedef int __swift_thread_key_t;
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# else
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typedef unsigned int __swift_thread_key_t;
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# endif
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# elif defined(__FreeBSD__)
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typedef int __swift_thread_key_t;
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# elif defined(_WIN32)
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typedef unsigned long __swift_thread_key_t;
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# elif defined(__HAIKU__)
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typedef int __swift_thread_key_t;
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# else
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typedef unsigned long __swift_thread_key_t;
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# endif
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# if defined(_WIN32) && !defined(__CYGWIN__)
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// Windows has its own flavor of API.
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# include <io.h>
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# define WIN32_LEAN_AND_MEAN
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# include <Windows.h>
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static_assert(std::is_same<__swift_thread_key_t, DWORD>::value,
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"__swift_thread_key_t is not a DWORD");
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# define SWIFT_THREAD_KEY_CREATE _stdlib_thread_key_create
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# define SWIFT_THREAD_GETSPECIFIC FlsGetValue
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# define SWIFT_THREAD_SETSPECIFIC(key, value) (FlsSetValue(key, value) == TRUE)
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# else
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// Otherwise use the pthread API.
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# include <pthread.h>
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# define SWIFT_THREAD_KEY_CREATE pthread_key_create
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# define SWIFT_THREAD_GETSPECIFIC pthread_getspecific
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# define SWIFT_THREAD_SETSPECIFIC pthread_setspecific
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# endif
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#endif
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#endif // SWIFT_RUNTIME_THREADLOCALSTORAGE_H
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