linux-sgx-trts-modified/sdk/tlibcxx/include/__sgx

/*
 * Copyright (C) 2011-2017 Intel Corporation. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   * Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   * Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in
 *     the documentation and/or other materials provided with the
 *     distribution.
 *   * Neither the name of Intel Corporation nor the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */

#ifndef __LIBCPP_SGX
#define __LIBCPP_SGX

/*
 * libc++ configuration file specific to SGX SDK
 * It is internal libc++ header - DO NOT include it directly 
 */

#ifndef UNREFERENCED_PARAMETER
#    define UNREFERENCED_PARAMETER(P) (P)
#endif //UNREFERENCED_PARAMETER

// SECTION 1: NEW DEFINES SPECIFIC TO SGX

#define _LIBCPP_SGX_CONFIG

/* No I/O operations that involve OCALLs allowed */
#define _LIBCPP_SGX_NO_IOSTREAMS

// Define to replace usage of __cplusplus 
// The compiler sets this to latest standard it supports although we want code using
// this to conform to C++11 not C++14 or later.
// More specific we should not compile code under __cplusplus > 201103L.
// Code under __cplusplus >= 201103L is fine.
#define sgx__cplusplus 201103L
// We need to make sure that where __cplusplus is used in defines it always goes to path for 
// #define __cplusplus 201103L because it might be defined to something higher.

// Set SGX specific endianess below
#include <sys/endian.h>
#ifdef _LIBCPP_LITTLE_ENDIAN
#undef _LIBCPP_LITTLE_ENDIAN
#endif // _LIBCPP_LITTLE_ENDIAN
#ifdef _LIBCPP_BIG_ENDIAN
#undef _LIBCPP_BIG_ENDIAN
#endif //_LIBCPP_BIG_ENDIAN
#if _BYTE_ORDER == _LITTLE_ENDIAN
#    define _LIBCPP_LITTLE_ENDIAN 1
#    define _LIBCPP_BIG_ENDIAN    0
#else  // _BYTE_ORDER == _LITTLE_ENDIAN
#    define _LIBCPP_LITTLE_ENDIAN 0
#    define _LIBCPP_BIG_ENDIAN    1
#endif  // _BYTE_ORDER == _LITTLE_ENDIAN

// Use sgx assert
#include <assert.h>
#if defined(_LIBCPP_ASSERT)
#undef _LIBCPP_ASSERT
#endif // _LIBCPP_ASSERT
#define _LIBCPP_ASSERT(x, m)  (assert(x))

// RTTI comes from cpprt. Undefine NO_RTTI
#if defined(_LIBCPP_NO_RTTI)
#undef _LIBCPP_NO_RTTI
#endif // _LIBCPP_NO_RTTI

#if defined(__GNUC__)

/////////////
// SECTION 2: UNDEF VARIOUS LIBC++ DEFINES FOR SUPPORTED FEATURES
/////////////
#undef _LIBCPP_USING_DEV_RANDOM
#define _LIBCPP_USING_SGX_RANDOM
#undef _LIBCPP_NO_EXCEPTIONS
#undef _LIBCPP_HAS_NO_TEMPLATE_ALIASES
#undef _LIBCPP_HAS_NO_CONSTEXPR
#undef _LIBCPP_HAS_NO_UNICODE_CHARS
#undef _LIBCPP_HAS_NO_DELETED_FUNCTIONS
#undef _LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS
#undef _LIBCPP_HAS_NO_VARIADICS
#undef _LIBCPP_HAS_NO_ADVANCED_SFINAE
#undef _LIBCPP_HAS_NO_VARIABLE_TEMPLATES        // Will be set
#undef _LIBCPP_HAS_NO_RVALUE_REFERENCES
#undef _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS

//#undef _LIBCPP_DEBUG // TBD. Debug without I/O?
#undef _LIBCPP_HAS_QUICK_EXIT
#undef _LIBCPP_HAS_NO_THREAD_UNSAFE_C_FUNCTIONS // Not used

// Current goal is to support C++11 so define the version accordingly.
// Libc++ also supports 14 and beyond. 
#define _LIBCPP_STD_VER 11

/////////////
// SECTION 3: DEFINE VARIOUS LIBC++ DEFINES TO CUSTOMIZE USAGE FOR SGX
/////////////
#define _LIBCPP_HAS_NO_THREADS
#define _LIBCPP_HAS_NO_STDIN
#define _LIBCPP_HAS_NO_STDOUT
#define _LIBCPP_HAS_NO_GLOBAL_FILESYSTEM_NAMESPACE
#undef _LIBCPP_SGX_HAS_NO_THREADS
#undef _LIBCPP_SGX_HAS_NO_ATOMIC

/////////////
// SECTION 4: SGX specific defines which replace __has_feature(cxx_something)
/////////////
#define _LIBCPP_SGX_HAS_CXX_ATOMIC //__has_feature(cxx_atomic)
#endif

#endif  // _LIBCPP_SGX