323ade3e70
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 git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@240527 91177308-0d34-0410-b5e6-96231b3b80d8
181 lines
5.4 KiB
C++
181 lines
5.4 KiB
C++
// -*- C++ -*-
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//===--------------------------- cstdlib ----------------------------------===//
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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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#ifndef _LIBCPP_CSTDLIB
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#define _LIBCPP_CSTDLIB
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/*
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cstdlib synopsis
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Macros:
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EXIT_FAILURE
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EXIT_SUCCESS
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MB_CUR_MAX
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NULL
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RAND_MAX
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namespace std
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{
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Types:
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size_t
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div_t
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ldiv_t
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lldiv_t // C99
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double atof (const char* nptr);
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int atoi (const char* nptr);
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long atol (const char* nptr);
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long long atoll(const char* nptr); // C99
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double strtod (const char* restrict nptr, char** restrict endptr);
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float strtof (const char* restrict nptr, char** restrict endptr); // C99
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long double strtold (const char* restrict nptr, char** restrict endptr); // C99
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long strtol (const char* restrict nptr, char** restrict endptr, int base);
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long long strtoll (const char* restrict nptr, char** restrict endptr, int base); // C99
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unsigned long strtoul (const char* restrict nptr, char** restrict endptr, int base);
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unsigned long long strtoull(const char* restrict nptr, char** restrict endptr, int base); // C99
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int rand(void);
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void srand(unsigned int seed);
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void* calloc(size_t nmemb, size_t size);
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void free(void* ptr);
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void* malloc(size_t size);
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void* realloc(void* ptr, size_t size);
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void abort(void);
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int atexit(void (*func)(void));
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void exit(int status);
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void _Exit(int status);
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char* getenv(const char* name);
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int system(const char* string);
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void* bsearch(const void* key, const void* base, size_t nmemb, size_t size,
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int (*compar)(const void *, const void *));
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void qsort(void* base, size_t nmemb, size_t size,
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int (*compar)(const void *, const void *));
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int abs( int j);
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long abs( long j);
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long long abs(long long j); // C++0X
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long labs( long j);
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long long llabs(long long j); // C99
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div_t div( int numer, int denom);
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ldiv_t div( long numer, long denom);
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lldiv_t div(long long numer, long long denom); // C++0X
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ldiv_t ldiv( long numer, long denom);
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lldiv_t lldiv(long long numer, long long denom); // C99
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int mblen(const char* s, size_t n);
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int mbtowc(wchar_t* restrict pwc, const char* restrict s, size_t n);
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int wctomb(char* s, wchar_t wchar);
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size_t mbstowcs(wchar_t* restrict pwcs, const char* restrict s, size_t n);
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size_t wcstombs(char* restrict s, const wchar_t* restrict pwcs, size_t n);
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int at_quick_exit(void (*func)(void)) // C++11
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void quick_exit(int status); // C++11
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void *aligned_alloc(size_t alignment, size_t size); // C11
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} // std
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*/
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#include <__config>
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#include <stdlib.h>
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#ifdef _LIBCPP_MSVCRT
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#include "support/win32/locale_win32.h"
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#endif // _LIBCPP_MSVCRT
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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#pragma GCC system_header
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#endif
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_LIBCPP_BEGIN_NAMESPACE_STD
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using ::size_t;
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using ::div_t;
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using ::ldiv_t;
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#ifndef _LIBCPP_HAS_NO_LONG_LONG
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using ::lldiv_t;
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#endif // _LIBCPP_HAS_NO_LONG_LONG
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using ::atof;
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using ::atoi;
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using ::atol;
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#ifndef _LIBCPP_HAS_NO_LONG_LONG
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using ::atoll;
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#endif // _LIBCPP_HAS_NO_LONG_LONG
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using ::strtod;
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using ::strtof;
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using ::strtold;
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using ::strtol;
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#ifndef _LIBCPP_HAS_NO_LONG_LONG
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using ::strtoll;
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#endif // _LIBCPP_HAS_NO_LONG_LONG
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using ::strtoul;
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#ifndef _LIBCPP_HAS_NO_LONG_LONG
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using ::strtoull;
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#endif // _LIBCPP_HAS_NO_LONG_LONG
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using ::rand;
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using ::srand;
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using ::calloc;
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using ::free;
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using ::malloc;
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using ::realloc;
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using ::abort;
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using ::atexit;
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using ::exit;
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using ::_Exit;
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using ::getenv;
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using ::system;
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using ::bsearch;
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using ::qsort;
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#undef abs
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using ::abs;
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#undef labs
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using ::labs;
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#ifndef _LIBCPP_HAS_NO_LONG_LONG
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#undef llabs
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using ::llabs;
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#endif // _LIBCPP_HAS_NO_LONG_LONG
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#undef div
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using ::div;
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#undef ldiv
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using ::ldiv;
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#ifndef _LIBCPP_HAS_NO_LONG_LONG
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#undef lldiv
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using ::lldiv;
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#endif // _LIBCPP_HAS_NO_LONG_LONG
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#ifndef _LIBCPP_HAS_NO_THREAD_UNSAFE_C_FUNCTIONS
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using ::mblen;
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using ::mbtowc;
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using ::wctomb;
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#endif
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using ::mbstowcs;
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using ::wcstombs;
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#ifdef _LIBCPP_HAS_QUICK_EXIT
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using ::at_quick_exit;
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using ::quick_exit;
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#endif
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#ifdef _LIBCPP_HAS_C11_FEATURES
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using ::aligned_alloc;
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#endif
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// MSVCRT already has the correct prototype in <stdlib.h> #ifdef __cplusplus
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#if !defined(_LIBCPP_MSVCRT) && !defined(__sun__) && !defined(_AIX)
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inline _LIBCPP_INLINE_VISIBILITY long abs( long __x) _NOEXCEPT {return labs(__x);}
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#ifndef _LIBCPP_HAS_NO_LONG_LONG
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inline _LIBCPP_INLINE_VISIBILITY long long abs(long long __x) _NOEXCEPT {return llabs(__x);}
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#endif // _LIBCPP_HAS_NO_LONG_LONG
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inline _LIBCPP_INLINE_VISIBILITY ldiv_t div( long __x, long __y) _NOEXCEPT {return ldiv(__x, __y);}
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#ifndef _LIBCPP_HAS_NO_LONG_LONG
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inline _LIBCPP_INLINE_VISIBILITY lldiv_t div(long long __x, long long __y) _NOEXCEPT {return lldiv(__x, __y);}
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#endif // _LIBCPP_HAS_NO_LONG_LONG
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#endif // _LIBCPP_MSVCRT
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP_CSTDLIB
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