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#ifndef FWCore_Framework_ModuleSignalSentry_h
#define FWCore_Framework_ModuleSignalSentry_h
#include "FWCore/Utilities/interface/ConvertException.h"
namespace edm {
class ActivityRegistry;
class ModuleCallingContext;
template <typename T>
class ModuleSignalSentry {
public:
ModuleSignalSentry(ActivityRegistry* a,
typename T::Context const* context,
ModuleCallingContext const* moduleCallingContext)
: a_(a), context_(context), moduleCallingContext_(moduleCallingContext) {}
~ModuleSignalSentry() {
// This destructor does nothing unless we are unwinding the
// the stack from an earlier exception (a_ will be null if we are
// are not). We want to report the earlier exception and ignore any
// addition exceptions from the post module signal.
CMS_SA_ALLOW try {
if (a_) {
T::postModuleSignal(a_, context_, moduleCallingContext_);
}
} catch (...) {
}
}
void preModuleSignal() {
if (a_) {
try {
convertException::wrap([this]() { T::preModuleSignal(a_, context_, moduleCallingContext_); });
} catch (cms::Exception& ex) {
ex.addContext("Handling pre module signal, likely in a service function immediately before module method");
throw;
}
}
}
void postModuleSignal() {
if (a_) {
auto temp = a_;
// Setting a_ to null informs the destructor that the signal
// was already run and that it should do nothing.
a_ = nullptr;
try {
convertException::wrap([this, temp]() { T::postModuleSignal(temp, context_, moduleCallingContext_); });
} catch (cms::Exception& ex) {
ex.addContext("Handling post module signal, likely in a service function immediately after module method");
throw;
}
}
}
private:
ActivityRegistry* a_; // We do not use propagate_const because the registry itself is mutable.
typename T::Context const* context_;
ModuleCallingContext const* moduleCallingContext_;
};
} // namespace edm
#endif
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