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https://github.com/apple/swift.git
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Mike Ash
f7745f2094
Rather than attempt to use standard C++ type names, create a namespace specifically for environment variable types and require vars to use a type from that namespace. This avoids the annoying collision between this `string` and `std::string`, and makes everything a bit more consistent. Rename the types a bit to be more appropriate for this context: boolean, uint8, and uint32, instead of bool, uint8_t, and uint32_t.
86 lines
3.5 KiB
C++
86 lines
3.5 KiB
C++
//===--- EnvironmentVariables.h - Debug variables. --------------*- 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 - 2020 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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//
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// Debug behavior conditionally enabled using environment variables.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_RUNTIME_ENVIRONMENTVARIABLES_H
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#define SWIFT_RUNTIME_ENVIRONMENTVARIABLES_H
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#include "swift/Threading/Once.h"
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#include "swift/shims/Visibility.h"
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namespace swift {
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namespace runtime {
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namespace environment {
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void initialize(void *);
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extern swift::once_t initializeToken;
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// Types that can be used for environment variables.
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namespace types {
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using boolean = bool;
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using string = const char *;
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using uint8 = uint8_t;
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using uint32 = uint32_t;
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} // namespace types
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// Declare backing variables.
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#define VARIABLE(name, type, defaultValue, help) \
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extern swift::runtime::environment::types::type name##_variable; \
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extern bool name##_isSet_variable;
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#include "../../../stdlib/public/runtime/EnvironmentVariables.def"
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// Define getter functions. This creates one function with the same name as the
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// variable which returns the value set for that variable, and second function
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// ending in _isSet which returns a boolean indicating whether the variable was
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// set at all, to allow detecting when the variable was explicitly set to the
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// same value as the default.
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#define VARIABLE(name, type, defaultValue, help) \
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inline swift::runtime::environment::types::type name() { \
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swift::once(initializeToken, initialize, nullptr); \
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return name##_variable; \
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} \
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inline bool name##_isSet() { \
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swift::once(initializeToken, initialize, nullptr); \
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return name##_isSet_variable; \
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}
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#include "../../../stdlib/public/runtime/EnvironmentVariables.def"
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// Wrapper around SWIFT_DEBUG_CONCURRENCY_ENABLE_COOPERATIVE_QUEUES that the
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// Concurrency library can call.
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SWIFT_RUNTIME_STDLIB_SPI bool concurrencyEnableCooperativeQueues();
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// Wrapper around SWIFT_DEBUG_VALIDATE_UNCHECKED_CONTINUATIONS that the
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// Concurrency library can call.
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SWIFT_RUNTIME_STDLIB_SPI bool concurrencyValidateUncheckedContinuations();
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// Wrapper around SWIFT_IS_CURRENT_EXECUTOR_LEGACY_MODE_OVERRIDE that the
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// Concurrency library can call.
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SWIFT_RUNTIME_STDLIB_SPI const char *concurrencyIsCurrentExecutorLegacyModeOverride();
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// Wrapper around SWIFT_DEBUG_ENABLE_TASK_SLAB_ALLOCATOR that the Concurrency
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// library can call.
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SWIFT_RUNTIME_STDLIB_SPI bool concurrencyEnableTaskSlabAllocator();
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// Wrapper around SWIFT_CONCURRENCY_TRACING_SUBSYSTEM that the Concurrency
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// library can call.
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SWIFT_RUNTIME_STDLIB_SPI const char *concurrencyTracingSubsystem();
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} // end namespace environment
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} // end namespace runtime
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} // end namespace swift
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#endif // SWIFT_RUNTIME_ENVIRONMENTVARIABLES_H
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