kopia lustrzana https://gitlab.com/sane-project/backends
86 wiersze
3.1 KiB
C++
86 wiersze
3.1 KiB
C++
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/* sane - Scanner Access Now Easy.
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Copyright (C) 2019 Povilas Kanapickas <povilas@radix.lt>
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This file is part of the SANE package.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston,
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MA 02111-1307, USA.
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As a special exception, the authors of SANE give permission for
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additional uses of the libraries contained in this release of SANE.
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The exception is that, if you link a SANE library with other files
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to produce an executable, this does not by itself cause the
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resulting executable to be covered by the GNU General Public
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License. Your use of that executable is in no way restricted on
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account of linking the SANE library code into it.
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This exception does not, however, invalidate any other reasons why
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the executable file might be covered by the GNU General Public
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License.
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If you submit changes to SANE to the maintainers to be included in
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a subsequent release, you agree by submitting the changes that
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those changes may be distributed with this exception intact.
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If you write modifications of your own for SANE, it is your choice
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whether to permit this exception to apply to your modifications.
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If you do not wish that, delete this exception notice.
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*/
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#define DEBUG_DECLARE_ONLY
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#include "genesys_error.h"
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#if (defined(__GNUC__) || defined(__CLANG__)) && (defined(__linux__) || defined(__APPLE__))
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extern "C" char* __cxa_get_globals();
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#endif
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static unsigned num_uncaught_exceptions()
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{
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#if __cplusplus >= 201703L
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int count = std::uncaught_exceptions();
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return count >= 0 ? count : 0;
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#elif (defined(__GNUC__) || defined(__CLANG__)) && (defined(__linux__) || defined(__APPLE__))
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// the format of the __cxa_eh_globals struct is enshrined into the Itanium C++ ABI and it's
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// very unlikely we'll get issues referencing it directly
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char* cxa_eh_globals_ptr = __cxa_get_globals();
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return *reinterpret_cast<unsigned*>(cxa_eh_globals_ptr + sizeof(void*));
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#else
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return std::uncaught_exception() ? 1 : 0;
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#endif
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}
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DebugMessageHelper::DebugMessageHelper(const char* func)
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{
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func_ = func;
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num_exceptions_on_enter_ = num_uncaught_exceptions();
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DBG(DBG_proc, "%s: start", func_);
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}
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DebugMessageHelper::~DebugMessageHelper()
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{
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if (num_exceptions_on_enter_ < num_uncaught_exceptions()) {
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if (status_) {
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DBG(DBG_error, "%s: failed during %s", func_, status_);
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} else {
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DBG(DBG_error, "%s: failed", func_);
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}
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} else {
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DBG(DBG_proc, "%s: completed", func_);
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}
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}
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