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SWIFT_STDLIB_SINGLE_THREADED_RUNTIME is too much of a blunt instrument here. It covers both the Concurrency runtime and the rest of the runtime, but we'd like to be able to have e.g. a single-threaded Concurrency runtime while the rest of the runtime is still thread safe (for instance). So: rename it to SWIFT_STDLIB_SINGLE_THREADED_CONCURRENCY and make it just control the Concurrency runtime, then add a SWIFT_STDLIB_THREADING_PACKAGE setting at the CMake/build-script level, which defines SWIFT_STDLIB_THREADING_xxx where xxx depends on the chosen threading package. This is especially useful on systems where there may be a choice of threading package that you could use. rdar://90776105
115 lines
3.9 KiB
C++
115 lines
3.9 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 "swift/Runtime/Config.h"
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#if SWIFT_STDLIB_THREADING_DARWIN || SWIFT_STDLIB_THREADING_PTHREADS
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#include <pthread.h>
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#elif SWIFT_STDLIB_THREADING_C11
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#include <threads.h>
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#elif SWIFT_STDLIB_THREADING_WIN32
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# define WIN32_LEAN_AND_MEAN
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# include <Windows.h>
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#endif
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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 SWIFT_STDLIB_THREADING_DARWIN
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# define SWIFT_TLS_HAS_RESERVED_PTHREAD_SPECIFIC 1
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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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#define SWIFT_THREAD_KEY_INIT pthread_key_init_np
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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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# ifndef __PTK_FRAMEWORK_SWIFT_KEY2
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# define __PTK_FRAMEWORK_SWIFT_KEY2 102
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# endif
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# ifndef __PTK_FRAMEWORK_SWIFT_KEY3
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# define __PTK_FRAMEWORK_SWIFT_KEY3 103
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# endif
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# ifndef __PTK_FRAMEWORK_SWIFT_KEY4
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# define __PTK_FRAMEWORK_SWIFT_KEY4 104
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# endif
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# ifndef __PTK_FRAMEWORK_SWIFT_KEY5
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# define __PTK_FRAMEWORK_SWIFT_KEY5 105
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# endif
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# ifndef __PTK_FRAMEWORK_SWIFT_KEY6
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# define __PTK_FRAMEWORK_SWIFT_KEY6 106
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# endif
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# ifndef __PTK_FRAMEWORK_SWIFT_KEY7
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# define __PTK_FRAMEWORK_SWIFT_KEY7 107
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# endif
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# ifndef __PTK_FRAMEWORK_SWIFT_KEY8
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# define __PTK_FRAMEWORK_SWIFT_KEY8 108
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# endif
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# ifndef __PTK_FRAMEWORK_SWIFT_KEY9
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# define __PTK_FRAMEWORK_SWIFT_KEY9 109
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# endif
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# define SWIFT_RUNTIME_TLS_KEY __PTK_FRAMEWORK_SWIFT_KEY0
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# define SWIFT_STDLIB_TLS_KEY __PTK_FRAMEWORK_SWIFT_KEY1
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# define SWIFT_COMPATIBILITY_50_TLS_KEY __PTK_FRAMEWORK_SWIFT_KEY2
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# define SWIFT_CONCURRENCY_TASK_KEY __PTK_FRAMEWORK_SWIFT_KEY3
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# define SWIFT_CONCURRENCY_EXECUTOR_TRACKING_INFO_KEY __PTK_FRAMEWORK_SWIFT_KEY4
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# define SWIFT_CONCURRENCY_FALLBACK_TASK_LOCAL_STORAGE_KEY \
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__PTK_FRAMEWORK_SWIFT_KEY5
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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 SWIFT_STDLIB_THREADING_WIN32
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typedef DWORD __swift_thread_key_t;
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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) == FALSE)
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#elif SWIFT_STDLIB_THREADING_PTHREADS || SWIFT_STDLIB_THREADING_DARWIN
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typedef pthread_key_t __swift_thread_key_t;
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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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#elif SWIFT_STDLIB_THREADING_C11
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typedef tss_t __swift_thread_key_t;
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# define SWIFT_THREAD_KEY_CREATE tss_create
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# define SWIFT_THREAD_GETSPECIFIC tss_get
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# define SWIFT_THREAD_SETSPECIFIC tss_set
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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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#endif
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#endif // SWIFT_RUNTIME_THREADLOCALSTORAGE_H
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