initial import

Foundation/src/SignalHandler.cpp

@@ -0,0 +1,127 @@
+//
+// SignalHandler.cpp
+//
+// $Id: //poco/1.1.0/Foundation/src/SignalHandler.cpp#2 $
+//
+// Library: Foundation
+// Package: Threading
+// Module:  SignalHandler
+//
+// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// Permission is hereby granted, free of charge, to any person or organization
+// obtaining a copy of the software and accompanying documentation covered by
+// this license (the "Software") to use, reproduce, display, distribute,
+// execute, and transmit the Software, and to prepare derivative works of the
+// Software, and to permit third-parties to whom the Software is furnished to
+// do so, all subject to the following:
+// 
+// The copyright notices in the Software and this entire statement, including
+// the above license grant, this restriction and the following disclaimer,
+// must be included in all copies of the Software, in whole or in part, and
+// all derivative works of the Software, unless such copies or derivative
+// works are solely in the form of machine-executable object code generated by
+// a source language processor.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
+// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
+// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
+// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+// DEALINGS IN THE SOFTWARE.
+//
+
+
+#include "Foundation/SignalHandler.h"
+
+
+#if defined(POCO_OS_FAMILY_UNIX)
+
+
+#include "Foundation/Thread.h"
+#include "Foundation/NumberFormatter.h"
+#include "Foundation/Exception.h"
+#include <signal.h>
+
+
+Foundation_BEGIN
+
+
+SignalHandler::JumpBufferVec SignalHandler::_jumpBufferVec;
+
+
+SignalHandler::SignalHandler()
+{
+	JumpBufferVec& jbv = jumpBufferVec();
+	JumpBuffer buf;
+	jbv.push_back(buf);
+}
+
+
+SignalHandler::~SignalHandler()
+{
+	jumpBufferVec().pop_back();
+}
+
+
+sigjmp_buf& SignalHandler::jumpBuffer()
+{
+	return jumpBufferVec().back().buf;
+}
+
+
+void SignalHandler::throwSignalException(int sig)
+{
+	switch (sig)
+	{
+	case SIGILL:
+		throw SignalException("Illegal instruction");
+	case SIGBUS:
+		throw SignalException("Bus error");
+	case SIGSEGV:
+		throw SignalException("Segmentation violation");
+	case SIGSYS:
+		throw SignalException("Invalid system call");
+	default:
+		throw SignalException(NumberFormatter::formatHex(sig));
+	}
+}
+
+
+void SignalHandler::install()
+{
+	struct sigaction sa;
+	sa.sa_handler = handleSignal;
+	sa.sa_flags   = 0;
+	sigemptyset(&sa.sa_mask);
+	sigaction(SIGILL,  &sa, 0);
+	sigaction(SIGBUS,  &sa, 0);
+	sigaction(SIGSEGV, &sa, 0);
+	sigaction(SIGSYS,  &sa, 0);
+}
+
+
+void SignalHandler::handleSignal(int sig)
+{
+	JumpBufferVec& jb = jumpBufferVec();
+	if (!jb.empty())
+		siglongjmp(jb.back().buf, sig);
+}
+
+
+SignalHandler::JumpBufferVec& SignalHandler::jumpBufferVec()
+{
+	ThreadImpl* pThread = ThreadImpl::currentImpl();
+	if (pThread)
+		return pThread->_jumpBufferVec;
+	else
+		return _jumpBufferVec;
+}
+
+
+Foundation_END
+
+
+#endif // POCO_OS_FAMILY_UNIX