This is an optimization which produces improved launching time. There should be no functionality change. Clients should see no ABI differences.
llvm-svn: 177443
Cr-Mirrored-From: sso://chromium.googlesource.com/_direct/external/github.com/llvm/llvm-project
Cr-Mirrored-Commit: 591ebe3cbbe19c1e241d24300a553e2427dca46f
diff --git a/src/iostream.cpp b/src/iostream.cpp
index f5b959b..7fc71df 100644
--- a/src/iostream.cpp
+++ b/src/iostream.cpp
@@ -13,6 +13,8 @@
_LIBCPP_BEGIN_NAMESPACE_STD
+static mbstate_t state_types[6] = {};
+
_ALIGNAS_TYPE (__stdinbuf<char> ) static char __cin [sizeof(__stdinbuf <char>)];
_ALIGNAS_TYPE (__stdoutbuf<char>) static char __cout[sizeof(__stdoutbuf<char>)];
_ALIGNAS_TYPE (__stdoutbuf<char>) static char __cerr[sizeof(__stdoutbuf<char>)];
@@ -33,17 +35,17 @@
ios_base::Init::Init()
{
- istream* cin_ptr = ::new(cin) istream(::new(__cin) __stdinbuf <char>(stdin) );
- ostream* cout_ptr = ::new(cout) ostream(::new(__cout) __stdoutbuf<char>(stdout));
- ostream* cerr_ptr = ::new(cerr) ostream(::new(__cerr) __stdoutbuf<char>(stderr));
+ istream* cin_ptr = ::new(cin) istream(::new(__cin) __stdinbuf <char>(stdin, state_types+0) );
+ ostream* cout_ptr = ::new(cout) ostream(::new(__cout) __stdoutbuf<char>(stdout, state_types+1));
+ ostream* cerr_ptr = ::new(cerr) ostream(::new(__cerr) __stdoutbuf<char>(stderr, state_types+2));
::new(clog) ostream(cerr_ptr->rdbuf());
cin_ptr->tie(cout_ptr);
_VSTD::unitbuf(*cerr_ptr);
cerr_ptr->tie(cout_ptr);
- wistream* wcin_ptr = ::new(wcin) wistream(::new(__wcin) __stdinbuf <wchar_t>(stdin) );
- wostream* wcout_ptr = ::new(wcout) wostream(::new(__wcout) __stdoutbuf<wchar_t>(stdout));
- wostream* wcerr_ptr = ::new(wcerr) wostream(::new(__wcerr) __stdoutbuf<wchar_t>(stderr));
+ wistream* wcin_ptr = ::new(wcin) wistream(::new(__wcin) __stdinbuf <wchar_t>(stdin, state_types+3) );
+ wostream* wcout_ptr = ::new(wcout) wostream(::new(__wcout) __stdoutbuf<wchar_t>(stdout, state_types+4));
+ wostream* wcerr_ptr = ::new(wcerr) wostream(::new(__wcerr) __stdoutbuf<wchar_t>(stderr, state_types+5));
::new(wclog) wostream(wcerr_ptr->rdbuf());
wcin_ptr->tie(wcout_ptr);
_VSTD::unitbuf(*wcerr_ptr);