NNG_DURATION(5) NNG Reference Manual NNG_DURATION(5)

nng_duration - relative time in milliseconds

#include <nng/nng.h>
typedef int32_t nng_duration;
#define NNG_DURATION_INFINITE (-1)
#define NNG_DURATION_DEFAULT  (-2)
#define NNG_DURATION_ZERO     (0)

An nng_duration is a relative time, measured in 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.

NNG_DURATION_DEFAULT

Indicates a context-specific default value should be used.

NNG_DURATION_INFINITE

Effectively an infinite duration; used most often to disable timeouts.

NNG_DURATION_ZERO

Zero length duration; used to perform a single polling operation.

nng_options(5), nng(7)

2025-01-05