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e0cf3b9a3c
One of the aspects of CloudABI is that it aims to help you write code that is thread-safe out of the box. This is very important if you want to write libraries that are easy to reuse. For CloudABI we decided to not provide the thread-unsafe functions. So far this is working out pretty well, as thread-unsafety issues are detected really early on. The following patch adds a knob to libc++, _LIBCPP_HAS_NO_THREAD_UNSAFE_C_FUNCTIONS, that can be set to disable thread-unsafe functions that can easily be avoided in practice. The following functions are not thread-safe: - <clocale>: locale handles should be preferred over setlocale(). - <cstdlib>: mbrlen(), mbrtowc() and wcrtomb() should be preferred over their non-restartable counterparts. - <ctime>: asctime(), ctime(), gmtime() and localtime() are not thread-safe. The first two are also deprecated by POSIX. Differential Revision: http://reviews.llvm.org/D8703 Reviewed by: marshall llvm-svn: 240527
43 lines
1.5 KiB
C++
43 lines
1.5 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// test <ctime>
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#include <ctime>
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#include <type_traits>
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#ifndef NULL
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#error NULL not defined
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#endif
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#ifndef CLOCKS_PER_SEC
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#error CLOCKS_PER_SEC not defined
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#endif
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int main()
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{
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std::clock_t c = 0;
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std::size_t s = 0;
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std::time_t t = 0;
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std::tm tm = {0};
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static_assert((std::is_same<decltype(std::clock()), std::clock_t>::value), "");
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static_assert((std::is_same<decltype(std::difftime(t,t)), double>::value), "");
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static_assert((std::is_same<decltype(std::mktime(&tm)), std::time_t>::value), "");
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static_assert((std::is_same<decltype(std::time(&t)), std::time_t>::value), "");
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#ifndef _LIBCPP_HAS_NO_THREAD_UNSAFE_C_FUNCTIONS
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static_assert((std::is_same<decltype(std::asctime(&tm)), char*>::value), "");
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static_assert((std::is_same<decltype(std::ctime(&t)), char*>::value), "");
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static_assert((std::is_same<decltype(std::gmtime(&t)), std::tm*>::value), "");
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static_assert((std::is_same<decltype(std::localtime(&t)), std::tm*>::value), "");
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#endif
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char* c1 = 0;
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const char* c2 = 0;
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static_assert((std::is_same<decltype(std::strftime(c1,s,c2,&tm)), std::size_t>::value), "");
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}
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