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78 lines
2.5 KiB
C++
78 lines
2.5 KiB
C++
//===--- GlobalObjects.cpp - Statically-initialized objects ---------------===//
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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 - 2016 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 http://swift.org/LICENSE.txt for license information
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// See http://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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// Objects that are allocated at global scope instead of on the heap,
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// and statically initialized to avoid synchronization costs, are
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// defined here.
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//
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//===----------------------------------------------------------------------===//
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#include "../SwiftShims/GlobalObjects.h"
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#include "swift/Runtime/Metadata.h"
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#include "swift/Runtime/Debug.h"
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#include <stdlib.h>
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namespace swift {
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// FIXME(ABI)#76 : does this declaration need SWIFT_RUNTIME_STDLIB_INTERFACE?
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// _direct type metadata for Swift._EmptyArrayStorage
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SWIFT_RUNTIME_STDLIB_INTERFACE
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extern "C" ClassMetadata _TMCs18_EmptyArrayStorage;
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}
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swift::_SwiftEmptyArrayStorage swift::_swiftEmptyArrayStorage = {
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// HeapObject header;
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{
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&_TMCs18_EmptyArrayStorage, // isa pointer
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},
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// _SwiftArrayBodyStorage body;
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{
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0, // int count;
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1 // unsigned int _capacityAndFlags; 1 means elementTypeIsBridgedVerbatim
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}
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};
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static __swift_uint64_t randomUInt64() {
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#if defined(__APPLE__)
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return static_cast<__swift_uint64_t>(arc4random()) |
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(static_cast<__swift_uint64_t>(arc4random()) << 32);
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#else
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auto devUrandom = fopen("/dev/urandom", "r");
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if (!devUrandom) {
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swift::fatalError(/* flags = */ 0, "Opening \"/dev/urandom\" failed");
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}
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uint64_t result;
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if (fread(&result, sizeof(result), 1, devUrandom) != 1) {
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swift::fatalError(/* flags = */ 0, "Reading from \"/dev/urandom\" failed");
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}
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if (fclose(devUrandom)) {
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swift::fatalError(/* flags = */ 0, "Closing \"/dev/urandom\" failed");
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}
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return result;
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#endif
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}
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SWIFT_ALLOWED_RUNTIME_GLOBAL_CTOR_BEGIN
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swift::_SwiftHashingSecretKey swift::_swift_stdlib_Hashing_secretKey = {
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randomUInt64(), randomUInt64()
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};
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SWIFT_ALLOWED_RUNTIME_GLOBAL_CTOR_END
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__swift_uint64_t swift::_swift_stdlib_HashingDetail_fixedSeedOverride = 0;
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namespace llvm { namespace hashing { namespace detail {
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// An extern variable expected by LLVM's hashing templates. We don't link any
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// LLVM libs into the runtime, so define this here.
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size_t fixed_seed_override = 0;
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} } }
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