Support for XISF
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// ____ ______ __
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// / __ \ / ____// /
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// / /_/ // / / /
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// / ____// /___ / /___ PixInsight Class Library
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// /_/ \____//_____/ PCL 2.4.23
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// ----------------------------------------------------------------------------
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// pcl/UnixSignalException.h - Released 2022-03-12T18:59:29Z
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// ----------------------------------------------------------------------------
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// This file is part of the PixInsight Class Library (PCL).
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// PCL is a multiplatform C++ framework for development of PixInsight modules.
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//
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// Copyright (c) 2003-2022 Pleiades Astrophoto S.L. All Rights Reserved.
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//
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// Redistribution and use in both source and binary forms, with or without
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// modification, is permitted provided that the following conditions are met:
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//
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// 1. All redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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//
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// 2. All redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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//
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// 3. Neither the names "PixInsight" and "Pleiades Astrophoto", nor the names
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// of their contributors, may be used to endorse or promote products derived
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// from this software without specific prior written permission. For written
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// permission, please contact info@pixinsight.com.
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//
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// 4. All products derived from this software, in any form whatsoever, must
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// reproduce the following acknowledgment in the end-user documentation
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// and/or other materials provided with the product:
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//
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// "This product is based on software from the PixInsight project, developed
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// by Pleiades Astrophoto and its contributors (https://pixinsight.com/)."
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//
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// Alternatively, if that is where third-party acknowledgments normally
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// appear, this acknowledgment must be reproduced in the product itself.
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//
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// THIS SOFTWARE IS PROVIDED BY PLEIADES ASTROPHOTO AND ITS CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL PLEIADES ASTROPHOTO OR ITS
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// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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// EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, BUSINESS
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// INTERRUPTION; PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; AND LOSS OF USE,
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// DATA OR PROFITS) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// POSSIBILITY OF SUCH DAMAGE.
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// ----------------------------------------------------------------------------
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#ifndef __PCL_UnixSignalException_h
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#define __PCL_UnixSignalException_h
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/// \file pcl/UnixSignalException.h
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#if defined( __PCL_WINDOWS ) || !defined( __PCL_LINUX ) && !defined( __PCL_FREEBSD ) && !defined( __PCL_MACOSX )
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# error UnixSignalException can only be used on Linux, FreeBSD and macOS platforms.
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#endif
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#include <pcl/Defs.h>
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#include <pcl/Exception.h>
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#include <signal.h>
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namespace pcl
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{
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// ----------------------------------------------------------------------------
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/*!
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* \class UnixSignalException
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* \brief A UNIX synchronous signal handler that throws C++ exceptions.
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*
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* This class can only be used on Linux, FreeBSD and macOS platforms. On
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* Windows platforms, including this header file from compilable code raises a
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* compilation error.
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*
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* For this handler to work properly, all code that may raise synchronous
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* signals (SIGSEGV and the like) must be compiled with GCC's
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* '-fnon-call-exceptions' flag. Otherwise the exceptions will be thrown
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* but terminate() will be called, which is the default critical signal
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* management behavior.
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*
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* To generate a backtrace report (see the UnixSignalException::Details()
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* member function), the code must be compiled with the '-rdynamic' GCC flag,
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* which instructs the linker to add all symbols to the dynamic symbol table.
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* In addition, the generated binaries should not be stripped with the '-s'
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* linker flag.
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*/
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class PCL_CLASS UnixSignalException : public pcl::Exception
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{
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public:
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/*!
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* Constructs a new %UnixSignalException object with the specified \a signal
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* number and optional backtrace \a details.
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*/
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UnixSignalException( int signal, const IsoString& details = IsoString() )
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: m_signal( signal )
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, m_details( details )
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{
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}
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/*!
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* Copy constructor.
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*/
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UnixSignalException( const UnixSignalException& ) = default;
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/*!
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* Returns the signal number associated with this object.
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*/
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int SignalNumber() const
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{
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return m_signal;
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}
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/*!
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* Returns the backtrace information associated with this exception.
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*
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* The returned string will be empty if no backtrace data were available at
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* the time this signal exception was generated. This happens when the code
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* has not been compiled and linked with the appropriate options (see the
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* -rdynamic compiler flag).
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*/
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const IsoString& Details() const
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{
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return m_details;
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}
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/*!
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* Returns an error or warning message corresponding to this signal
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* exception. Typical messages are "segmentation violation", "bus error" and
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* "floating point exception", returned by specific derived classes.
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*/
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String Message() const override
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{
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return "Undefined signal";
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}
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/*!
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* Returns a formatted error message with information on this signal
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* exception.
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*/
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String FormatInfo() const override
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{
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String info = String().Format( "Critical signal caught (%d): ", SignalNumber() ) + Message();
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if ( !m_details.IsEmpty() )
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{
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info.Append( '\n' );
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info.Append( m_details );
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}
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return info;
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}
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/*!
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* Returns the type of this exception, intended to be used as a caption for
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* a message box. As reimplemented in this class, this member function
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* returns the string "PCL Unix Signal Handler".
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*/
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String Caption() const override
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{
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return "PCL Unix Signal Handler";
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}
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/*!
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* Writes a formatted representation of this exception on the platform
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* console. A plain text version of the same textual representation will
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* also be written on stdout.
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*
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* \note UNIX synchronous interrupts are never reported on interactive
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* graphical interfaces, such as message boxes, irrespective of global
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* platform settings or local settings defined through calls to
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* EnableGUIOutput() and similar functions.
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*/
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void Show() const override;
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/*!
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* Initializes the UNIX synchronous signal handler. This static member
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* function must be called before the calling process can raise any
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* synchronous signal.
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*
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* \note A module should never call this member function. It is invoked when
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* appropriate by the PixInsight core application and internal PCL routines.
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*/
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static void Initialize();
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protected:
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int m_signal; // signal number
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IsoString m_details; // backtrace information
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};
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// ----------------------------------------------------------------------------
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#define DECLARE_UNIX_SIGNAL_EXCEPTION( className, sigNum, message ) \
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class PCL_CLASS className : public pcl::UnixSignalException \
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{ \
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public: \
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className( const IsoString& details = IsoString() ) : \
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pcl::UnixSignalException( sigNum, details ) \
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{ \
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} \
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className( const className& ) = default; \
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String Message() const override \
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{ \
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return message; \
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} \
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}
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// ----------------------------------------------------------------------------
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DECLARE_UNIX_SIGNAL_EXCEPTION( EUnixSegmentationViolation, SIGSEGV,
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"Segmentation violation" );
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DECLARE_UNIX_SIGNAL_EXCEPTION( EUnixBusError, SIGBUS,
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"Bus error" );
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DECLARE_UNIX_SIGNAL_EXCEPTION( EUnixFloatingPointException, SIGFPE,
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"Floating point exception" );
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DECLARE_UNIX_SIGNAL_EXCEPTION( EUnixIllegalInstructionException, SIGILL,
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"Illegal instruction" );
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DECLARE_UNIX_SIGNAL_EXCEPTION( EUnixIBrokenPipeException, SIGPIPE,
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"Broken pipe" );
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// ----------------------------------------------------------------------------
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#undef DECLARE_UNIX_SIGNAL_EXCEPTION
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// ----------------------------------------------------------------------------
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} // pcl
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#endif // __PCL_UnixSignalException_h
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// ----------------------------------------------------------------------------
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// EOF pcl/UnixSignalException.h - Released 2022-03-12T18:59:29Z
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