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-# nng_duration
-
-## NAME
-
-nng_duration --- relative time in milliseconds
-
-## SYNOPSIS
-
-```c
-#include <nng/nng.h>
-
-typedef int32_t nng_duration;
-
-#define NNG_DURATION_INFINITE (-1)
-#define NNG_DURATION_DEFAULT  (-2)
-#define NNG_DURATION_ZERO     (0)
-```
-
-## DESCRIPTION
-
-An {{i:`nng_duration`}}{{hi:duration}} is a relative time, measured in {{i:milliseconds}}.
-This type is most often used in conjunction with timers and timeouts.
-
-A couple of special values have been set aside, and carry special meanings.
-
-- {{i:`NNG_DURATION_DEFAULT`}}:
-  Indicates a context-specific default value should be used.
-
-- {{i:`NNG_DURATION_INFINITE`}}:
-  Effectively an infinite duration; used most often to disable timeouts.
-
-- {{i:`NNG_DURATION_ZERO`}}:
-  Zero length duration; used to perform an immediate poll.