) returns 1 if the current platform is async capable or 0 otherwise.</p>

<p>ASYNC_set_mem_functions returns 1 if custom stack allocators are supported by the current platform and no allocations have already occurred or 0 otherwise.</p>

<h1 id="NOTES">NOTES</h1>

<p>On Windows platforms the <i>&lt;openssl/async.h&gt;</i> header is dependent on some of the types customarily made available by including <i>&lt;windows.h&gt;</i>. The application developer is likely to require control over when the latter is in