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This documentation is for version v1.1.0 of nng, but the latest released version is v1.3.2. see the documentation for v1.3.2 for the most up-to-date information.


#include <nng/nng.h>

void *nng_alloc(size_t size);


The nng_alloc() function allocates a contiguous memory region of at least size bytes. The memory will be 64-bit aligned.

The returned memory can be used to hold message buffers, in which case it can be directly passed to nng_send() using the flag NNG_FLAG_ALLOC. Alternatively, it can be freed when no longer needed using nng_free().

Do not use the system free() function to release this memory. On some platforms this may work, but it is not guaranteed and may lead to a crash or other undesirable and unpredictable behavior.


This function returns a pointer to the allocated memory on success, and NULL otherwise.


No errors are returned, but a NULL return value should be treated the same as NNG_ENOMEM.

NNG Reference Manual vv1.1.0 © 2019 Staysail Systems, Inc, © 2018 Capitar IT Group BV
This document is supplied under the MIT License.
nanomsg™ and nng™ are trademarks of Garrett D'Amore.