[#ASYNC_WAIT_CTX_get_changed_fds]
= ASYNC_WAIT_CTX_get_changed_fds
:mrdocs:

Retrieve file descriptors added to or removed from a wait context since the last poll.

== Synopsis

Declared in `<openssl/async.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
int
ASYNC_WAIT_CTX_get_changed_fds(
    xref:ASYNC_WAIT_CTX.adoc[ASYNC_WAIT_CTX]* ctx,
    int* addfd,
    size_t* numaddfds,
    int* delfd,
    size_t* numdelfds);
----

== Return Value

1 on success.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *ctx*
| Wait context to query.
| *addfd*
| Array that receives fds to add to the poll set (may be NULL to skip copying).
| *numaddfds*
| On entry, capacity of `addfd;` on exit, number of fds to add.
| *delfd*
| Array that receives fds to remove from the poll set (may be NULL to skip copying).
| *numdelfds*
| On entry, capacity of `delfd;` on exit, number of fds to remove.
|===


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