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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#pragma once
#include <cstring>
#include <cstdint>
namespace mbus {
/**
* A context is an application specific unit of information that can
* be attached to a routable. Specifically, messagebus will ensure
* that when a reply is obtained, it will have the same context as the
* original message.
**/
struct Context
{
/**
* This is a region of memory that can be interpreted as either an
* integer or a pointer.
**/
union {
uint64_t UINT64;
void *PTR;
} value;
/**
* Create a context that is set to 0, however you interpret it.
**/
Context() { memset(&value, 0, sizeof(value)); }
/**
* Create a contex from an integer.
*
* @param v the value
**/
Context(uint64_t v) { value.UINT64 = v; }
/**
* Create a context from a pointer
*
* @param pt the pointer
**/
Context(void *pt) { value.PTR = pt; }
};
} // namespace mbus
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