'\" t
.\"     Title: nn_reallocmsg
.\"    Author: [see the "AUTHOR(S)" section]
.\" Generator: Asciidoctor 2.0.18
.\"      Date: 2021-02-08
.\"    Manual: NNG Reference Manual
.\"    Source: \ \&
.\"  Language: English
.\"
.TH "NN_REALLOCMSG" "3compat" "2021-02-08" "\ \&" "NNG Reference Manual"
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.SH "NAME"
nn_reallocmsg \- reallocate message (compatible API)
.SH "SYNOPSIS"
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.fam C
#include <nanomsg/nn.h>

void *nn_reallocmsg(void *old, size_t size);
.fam
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.SH "DESCRIPTION"
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The \f(CRnn_reallocmsg()\fP reallocates the message \fIold\fP, making it of size \fIsize\fP.
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.B Note
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This function is provided for API
compatibility with legacy \fIlibnanomsg\fP.
Consider using the relevant modern API instead.
.sp .5v
.RE
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On success, the contents of \fIold\fP are copied into the new message
(truncating if appropriate), then \fIold\fP is deallocated, and a pointer
to the new message payload is returned.
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On failure, the \fIold\fP message is unchanged, and the value \f(CRNULL\fP is returned
to the caller.
.SH "RETURN VALUES"
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This function returns a pointer to message buffer space, or \f(CRNULL\fP
on failure.
.SH "ERRORS"
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\f(CRENOMEM\fP
.RS 4
Insufficient memory is available.
.RE
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\f(CREINVAL\fP
.RS 4
An invalid \fIsize\fP was specified.
.RE
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\f(CRETERM\fP
.RS 4
The library is shutting down.
.RE
.SH "SEE ALSO"
.sp
nn_allocmsg(3compat),
nn_freemsg(3compat),
nn_errno(3compat),
nng_compat(3compat),
nng(7)