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// Copyright Catch2 Authors
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE.txt or copy at
// https://www.boost.org/LICENSE_1_0.txt)
// SPDX-License-Identifier: BSL-1.0
#ifndef CATCH_FATAL_CONDITION_HANDLER_HPP_INCLUDED
#define CATCH_FATAL_CONDITION_HANDLER_HPP_INCLUDED
#include <cassert>
namespace Catch {
/**
* Wrapper for platform-specific fatal error (signals/SEH) handlers
*
* Tries to be cooperative with other handlers, and not step over
* other handlers. This means that unknown structured exceptions
* are passed on, previous signal handlers are called, and so on.
*
* Can only be instantiated once, and assumes that once a signal
* is caught, the binary will end up terminating. Thus, there
*/
class FatalConditionHandler {
bool m_started = false;
// Install/disengage implementation for specific platform.
// Should be if-defed to work on current platform, can assume
// engage-disengage 1:1 pairing.
void engage_platform();
void disengage_platform() noexcept;
public:
// Should also have platform-specific implementations as needed
FatalConditionHandler();
~FatalConditionHandler();
void engage() {
assert(!m_started && "Handler cannot be installed twice.");
m_started = true;
engage_platform();
}
void disengage() noexcept {
assert(m_started && "Handler cannot be uninstalled without being installed first");
m_started = false;
disengage_platform();
}
};
//! Simple RAII guard for (dis)engaging the FatalConditionHandler
class FatalConditionHandlerGuard {
FatalConditionHandler* m_handler;
public:
FatalConditionHandlerGuard(FatalConditionHandler* handler):
m_handler(handler) {
m_handler->engage();
}
~FatalConditionHandlerGuard() {
m_handler->disengage();
}
};
} // end namespace Catch
#endif // CATCH_FATAL_CONDITION_HANDLER_HPP_INCLUDED
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