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ac1996000e
* Switch to calling `putchar_unlocked()` instead of `putchar()` for actual printing. We're already locking stdout with `flockfile()`, so there's no need for the redundant lock that `putchar()` uses. * Add an explicit lock to the output stream in `dump()`. This means the entire dump is printed with the lock held, which will prevent the output of `dump()` from mixing with prints on other threads. * Use `_debugPrint_unlocked()` instead of `debugPrint()` in `_adHocPrint()`. The output stream is already locked while this function is executing. Rename the function to `_adHocPrint_unlocked()` to make this explicit. * Use `targetStream.write()` and `_print_unlocked()` instead of `print()` in `_dumpObject()`. This removes the redundant locking, and also eliminates the creation of intermediate strings. Rename the function to `_dumpObject_unlocked()` to make this explicit. * Use `targetStream.write()`, `_print_unlocked()`, and `_debugPrint_unlocked()` in `_dumpSuperclass()`. This removes the redundant locking, and also eliminates the creation of intermediate strings. Rename the function to `_dumpSuperclass_unlocked()` to make this explicit. * Use `_debugPrint_unlocked()` instead of `debugPrint()` in `String.init(reflecting:)`. This shouldn't really make much of a difference but it matches the usage of `_print_unlocked()` in `String.init(_:)`. The net result is that all printing is still covered under locks like before, but stdout is never recursively locked. This should result in slightly faster printing. In addition, `dump()` is now covered under a single lock so it can't mix its output with prints from other threads.
76 lines
2.2 KiB
C++
76 lines
2.2 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 - 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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#include <type_traits>
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#include <unistd.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include "../SwiftShims/LibcShims.h"
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#if defined(__linux__)
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#include <bsd/stdlib.h>
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#endif
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static_assert(std::is_same<ssize_t, swift::__swift_ssize_t>::value,
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"__swift_ssize_t is wrong");
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namespace swift {
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void _swift_stdlib_free(void *ptr) { free(ptr); }
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int _swift_stdlib_putchar_unlocked(int c) { return putchar_unlocked(c); }
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__swift_size_t _swift_stdlib_strlen(const char *s) { return strlen(s); }
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int _swift_stdlib_memcmp(const void *s1, const void *s2, __swift_size_t n) {
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return memcmp(s1, s2, n);
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}
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__swift_ssize_t _swift_stdlib_read(int fd, void *buf, __swift_size_t nbyte) {
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return read(fd, buf, nbyte);
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}
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__swift_ssize_t _swift_stdlib_write(int fd, const void *buf,
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__swift_size_t nbyte) {
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return write(fd, buf, nbyte);
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}
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int _swift_stdlib_close(int fd) { return close(fd); }
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#if defined(__APPLE__)
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#include <malloc/malloc.h>
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size_t _swift_stdlib_malloc_size(const void *ptr) { return malloc_size(ptr); }
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#elif defined(__GNU_LIBRARY__)
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#include <malloc.h>
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size_t _swift_stdlib_malloc_size(const void *ptr) {
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return malloc_usable_size(const_cast<void *>(ptr));
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}
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#elif defined(__FreeBSD__)
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#include <malloc_np.h>
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size_t _swift_stdlib_malloc_size(const void *ptr) {
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return malloc_usable_size(const_cast<void *>(ptr));
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}
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#else
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#error No malloc_size analog known for this platform/libc.
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#endif
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__swift_uint32_t _swift_stdlib_arc4random(void) { return arc4random(); }
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__swift_uint32_t
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_swift_stdlib_arc4random_uniform(__swift_uint32_t upper_bound) {
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return arc4random_uniform(upper_bound);
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}
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} // namespace swift
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