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Make cout a little more thread-safe. This fixes http://llvm.org/bugs/show_bug.cgi?id=12158 

llvm-svn: 185222
This commit is contained in:
Howard Hinnant 2013-06-28 21:40:28 +00:00
parent b595f53069
commit e9672d0448
1 changed files with 9 additions and 10 deletions
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19
libcxx/include/__std_stream
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@ -263,30 +263,31 @@ __stdoutbuf<_CharT>::overflow(int_type __c)
char_type __1buf;
if (!traits_type::eq_int_type(__c, traits_type::eof()))
{
this->setp(&__1buf, &__1buf+1);
*this->pptr() = traits_type::to_char_type(__c);
this->pbump(1);
__1buf = traits_type::to_char_type(__c);
if (__always_noconv_)
{
if (fwrite(this->pbase(), sizeof(char_type), 1, __file_) != 1)
if (fwrite(&__1buf, sizeof(char_type), 1, __file_) != 1)
return traits_type::eof();
}
else
{
char* __extbe = __extbuf;
codecvt_base::result __r;
char_type* pbase = &__1buf;
char_type* pptr = pbase + 1;
char_type* epptr = pptr;
do
{
const char_type* __e;
__r = __cv_->out(*__st_, this->pbase(), this->pptr(), __e,
__r = __cv_->out(*__st_, pbase, pptr, __e,
__extbuf,
__extbuf + sizeof(__extbuf),
__extbe);
if (__e == this->pbase())
if (__e == pbase)
return traits_type::eof();
if (__r == codecvt_base::noconv)
{
if (fwrite(this->pbase(), 1, 1, __file_) != 1)
if (fwrite(pbase, 1, 1, __file_) != 1)
return traits_type::eof();
}
else if (__r == codecvt_base::ok || __r == codecvt_base::partial)
@ -296,15 +297,13 @@ __stdoutbuf<_CharT>::overflow(int_type __c)
return traits_type::eof();
if (__r == codecvt_base::partial)
{
this->setp((char_type*)__e, this->pptr());
this->pbump(static_cast<int>(this->epptr() - this->pbase()));
pbase = (char_type*)__e;
}
}
else
return traits_type::eof();
} while (__r == codecvt_base::partial);
}
this->setp(0, 0);
}
return traits_type::not_eof(__c);
}