0,0 → 1,205 |
// Exception Handling support header (exception_ptr class) for -*- C++ -*- |
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// Copyright (C) 2008-2015 Free Software Foundation, Inc. |
// |
// This file is part of GCC. |
// |
// GCC is free software; you can redistribute it and/or modify |
// it under the terms of the GNU General Public License as published by |
// the Free Software Foundation; either version 3, or (at your option) |
// any later version. |
// |
// GCC is distributed in the hope that it will be useful, |
// but WITHOUT ANY WARRANTY; without even the implied warranty of |
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
// GNU General Public License for more details. |
// |
// Under Section 7 of GPL version 3, you are granted additional |
// permissions described in the GCC Runtime Library Exception, version |
// 3.1, as published by the Free Software Foundation. |
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// You should have received a copy of the GNU General Public License and |
// a copy of the GCC Runtime Library Exception along with this program; |
// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
// <http://www.gnu.org/licenses/>. |
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/** @file bits/exception_ptr.h |
* This is an internal header file, included by other library headers. |
* Do not attempt to use it directly. @headername{exception} |
*/ |
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#ifndef _EXCEPTION_PTR_H |
#define _EXCEPTION_PTR_H |
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#pragma GCC visibility push(default) |
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#include <bits/c++config.h> |
#include <bits/exception_defines.h> |
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#if ATOMIC_INT_LOCK_FREE < 2 |
# error This platform does not support exception propagation. |
#endif |
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extern "C++" { |
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namespace std |
{ |
class type_info; |
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/** |
* @addtogroup exceptions |
* @{ |
*/ |
namespace __exception_ptr |
{ |
class exception_ptr; |
} |
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using __exception_ptr::exception_ptr; |
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/** Obtain an exception_ptr to the currently handled exception. If there |
* is none, or the currently handled exception is foreign, return the null |
* value. |
*/ |
exception_ptr current_exception() _GLIBCXX_USE_NOEXCEPT; |
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/// Throw the object pointed to by the exception_ptr. |
void rethrow_exception(exception_ptr) __attribute__ ((__noreturn__)); |
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namespace __exception_ptr |
{ |
/** |
* @brief An opaque pointer to an arbitrary exception. |
* @ingroup exceptions |
*/ |
class exception_ptr |
{ |
void* _M_exception_object; |
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explicit exception_ptr(void* __e) _GLIBCXX_USE_NOEXCEPT; |
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void _M_addref() _GLIBCXX_USE_NOEXCEPT; |
void _M_release() _GLIBCXX_USE_NOEXCEPT; |
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void *_M_get() const _GLIBCXX_NOEXCEPT __attribute__ ((__pure__)); |
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friend exception_ptr std::current_exception() _GLIBCXX_USE_NOEXCEPT; |
friend void std::rethrow_exception(exception_ptr); |
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public: |
exception_ptr() _GLIBCXX_USE_NOEXCEPT; |
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exception_ptr(const exception_ptr&) _GLIBCXX_USE_NOEXCEPT; |
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#if __cplusplus >= 201103L |
exception_ptr(nullptr_t) noexcept |
: _M_exception_object(0) |
{ } |
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exception_ptr(exception_ptr&& __o) noexcept |
: _M_exception_object(__o._M_exception_object) |
{ __o._M_exception_object = 0; } |
#endif |
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#if (__cplusplus < 201103L) || defined (_GLIBCXX_EH_PTR_COMPAT) |
typedef void (exception_ptr::*__safe_bool)(); |
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// For construction from nullptr or 0. |
exception_ptr(__safe_bool) _GLIBCXX_USE_NOEXCEPT; |
#endif |
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exception_ptr& |
operator=(const exception_ptr&) _GLIBCXX_USE_NOEXCEPT; |
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#if __cplusplus >= 201103L |
exception_ptr& |
operator=(exception_ptr&& __o) noexcept |
{ |
exception_ptr(static_cast<exception_ptr&&>(__o)).swap(*this); |
return *this; |
} |
#endif |
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~exception_ptr() _GLIBCXX_USE_NOEXCEPT; |
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void |
swap(exception_ptr&) _GLIBCXX_USE_NOEXCEPT; |
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#ifdef _GLIBCXX_EH_PTR_COMPAT |
// Retained for compatibility with CXXABI_1.3. |
void _M_safe_bool_dummy() _GLIBCXX_USE_NOEXCEPT |
__attribute__ ((__const__)); |
bool operator!() const _GLIBCXX_USE_NOEXCEPT |
__attribute__ ((__pure__)); |
operator __safe_bool() const _GLIBCXX_USE_NOEXCEPT; |
#endif |
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#if __cplusplus >= 201103L |
explicit operator bool() const |
{ return _M_exception_object; } |
#endif |
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friend bool |
operator==(const exception_ptr&, const exception_ptr&) |
_GLIBCXX_USE_NOEXCEPT __attribute__ ((__pure__)); |
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const class std::type_info* |
__cxa_exception_type() const _GLIBCXX_USE_NOEXCEPT |
__attribute__ ((__pure__)); |
}; |
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bool |
operator==(const exception_ptr&, const exception_ptr&) |
_GLIBCXX_USE_NOEXCEPT __attribute__ ((__pure__)); |
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bool |
operator!=(const exception_ptr&, const exception_ptr&) |
_GLIBCXX_USE_NOEXCEPT __attribute__ ((__pure__)); |
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inline void |
swap(exception_ptr& __lhs, exception_ptr& __rhs) |
{ __lhs.swap(__rhs); } |
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} // namespace __exception_ptr |
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/// Obtain an exception_ptr pointing to a copy of the supplied object. |
template<typename _Ex> |
exception_ptr |
make_exception_ptr(_Ex __ex) _GLIBCXX_USE_NOEXCEPT |
{ |
#if __cpp_exceptions |
try |
{ |
throw __ex; |
} |
catch(...) |
{ |
return current_exception(); |
} |
#else |
return exception_ptr(); |
#endif |
} |
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// _GLIBCXX_RESOLVE_LIB_DEFECTS |
// 1130. copy_exception name misleading |
/// Obtain an exception_ptr pointing to a copy of the supplied object. |
/// This function is deprecated, use std::make_exception_ptr instead. |
template<typename _Ex> |
exception_ptr |
copy_exception(_Ex __ex) _GLIBCXX_USE_NOEXCEPT _GLIBCXX_DEPRECATED; |
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template<typename _Ex> |
exception_ptr |
copy_exception(_Ex __ex) _GLIBCXX_USE_NOEXCEPT |
{ return std::make_exception_ptr<_Ex>(__ex); } |
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// @} group exceptions |
} // namespace std |
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} // extern "C++" |
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#pragma GCC visibility pop |
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#endif |