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https://github.com/apple/swift.git
synced 2026-06-20 15:42:51 +02:00
Mike Ash
d0017555c7
Replace C++ implementation of swift_beginAccess and swift_endAccess with (almost) pure Swift implementation. Helpers remain in C++ for TLS, getting return addresses, and raising a fatal error on violations. This change also moves the exclusivity access set head from the shared SwiftTLSContext structure to a dedicated TLS key. This improves performance, which is important for exclusivity checking. This is particularly the case where we can inline TLS access with a constant key, as on Darwin ARM64. The code that bridges exclusivity tracking into Concurrency remains in C++. The new Swift implementation exposes a few helpers for it to use as a replacement for directly manipulating the C++ implementation. rdar://161122309
55 lines
1.5 KiB
C++
55 lines
1.5 KiB
C++
//===--- LibcShims.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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#if defined(__APPLE__)
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#define _REENTRANT
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#include <math.h>
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#endif
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#if defined(_WIN32) && !defined(__CYGWIN__)
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#include <io.h>
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#include <stdlib.h>
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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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#include <stdio.h>
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#include <stdlib.h>
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#if defined(_WIN32)
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#include "swift/Runtime/Config.h"
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#endif
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#include "swift/shims/LibcShims.h"
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#if defined(_WIN32)
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SWIFT_ALLOWED_RUNTIME_GLOBAL_CTOR_BEGIN
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static void __attribute__((__constructor__))
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_swift_stdlib_configure_console_mode(void) {
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static UINT uiPrevConsoleCP = GetConsoleOutputCP();
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atexit([]() { SetConsoleOutputCP(uiPrevConsoleCP); });
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SetConsoleOutputCP(CP_UTF8);
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}
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SWIFT_ALLOWED_RUNTIME_GLOBAL_CTOR_END
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#endif
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SWIFT_RUNTIME_STDLIB_INTERNAL
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__swift_size_t _swift_stdlib_fwrite_stdout(const void *ptr,
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__swift_size_t size,
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__swift_size_t nitems) {
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return fwrite(ptr, size, nitems, stdout);
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}
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SWIFT_RUNTIME_STDLIB_INTERNAL
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void _swift_stdlib_fputs_stderr(const char *str) {
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fputs(str, stderr);
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}
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