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#ifndef FWCore_ServiceRegistry_ModuleCallingContext_h
#define FWCore_ServiceRegistry_ModuleCallingContext_h
/**\class edm::ModuleCallingContext
Description: This is intended primarily to be passed to
Services as an argument to their callback functions.
Usage:
*/
//
// Original Author: W. David Dagenhart
// Created: 7/11/2013
#include "FWCore/ServiceRegistry/interface/ParentContext.h"
#include <iosfwd>
#include <cstdint>
namespace cms {
class Exception;
}
namespace edm {
class GlobalContext;
class InternalContext;
class ModuleDescription;
class PlaceInPathContext;
class StreamContext;
class ModuleCallingContext {
public:
typedef ParentContext::Type Type;
enum class State {
kPrefetching, // prefetching products before starting to run
kRunning, // module actually running
kInvalid
};
ModuleCallingContext(ModuleDescription const* moduleDescription) noexcept;
ModuleCallingContext(ModuleDescription const* moduleDescription,
std::uintptr_t id,
State state,
ParentContext const& parent,
ModuleCallingContext const* previousOnThread) noexcept;
void setContext(State state, ParentContext const& parent, ModuleCallingContext const* previousOnThread) noexcept;
void setState(State state) noexcept { state_ = state; }
ModuleDescription const* moduleDescription() const noexcept { return moduleDescription_; }
State state() const noexcept { return state_; }
Type type() const noexcept { return parent_.type(); }
/** Returns a unique id for this module to differentiate possibly concurrent calls to the module.
The value returned may be large so not appropriate for an index lookup.
A value of 0 denotes a call to produce, analyze or filter. Other values denote a transform.
*/
std::uintptr_t callID() const noexcept { return id_; }
ParentContext const& parent() const noexcept { return parent_; }
ModuleCallingContext const* moduleCallingContext() const { return parent_.moduleCallingContext(); }
PlaceInPathContext const* placeInPathContext() const { return parent_.placeInPathContext(); }
StreamContext const* streamContext() const { return parent_.streamContext(); }
GlobalContext const* globalContext() const { return parent_.globalContext(); }
InternalContext const* internalContext() const { return parent_.internalContext(); }
// These functions will iterate up a series of linked context objects
// to find the StreamContext or GlobalContext at the top of the series.
// Throws if the top context object does not have that type.
StreamContext const* getStreamContext() const noexcept(false);
GlobalContext const* getGlobalContext() const noexcept(false);
// This function will iterate up a series of linked context objects to
// find the highest level ModuleCallingContext. It will often return a
// pointer to itself.
ModuleCallingContext const* getTopModuleCallingContext() const noexcept;
// Returns the number of ModuleCallingContexts above this ModuleCallingContext
// in the series of linked context objects.
unsigned depth() const noexcept;
ModuleCallingContext const* previousModuleOnThread() const noexcept { return previousModuleOnThread_; }
private:
ModuleCallingContext const* previousModuleOnThread_;
ModuleDescription const* moduleDescription_;
ParentContext parent_;
std::uintptr_t id_;
State state_;
};
void exceptionContext(cms::Exception&, ModuleCallingContext const&);
std::ostream& operator<<(std::ostream&, ModuleCallingContext const&);
} // namespace edm
#endif
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