contrib/sendmail/libsm/gen.html


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    <title>libsm : General Definitions</title>
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<a href="index.html">Back to libsm overview</a>

<center>
    <h1> libsm : General Definitions </h1>
    <br> $Id: gen.html,v 1.5 2000/12/08 21:41:42 ca Exp $
</center>

<h2> Introduction </h2>

The header file <tt>&lt;sm/gen.h&gt;</tt>
contains general definitions that are used by every other
header file in <b>libsm</b>.

<h2> Synopsis </h2>

<pre>
#include &lt;sm/gen.h&gt;

#define NULL		((void*)0)

typedef int bool;
#define false	0
#define true	1

#define SM_MAX(a, b)	((a) &gt; (b) ? (a) : (b))
#define SM_MIN(a, b)	((a) &lt; (b) ? (a) : (b))

/*
**  The following types can be accessed and updated atomically.
**  This is relevant in the context of signal handlers and threads.
*/
typedef <i>some signed integral type</i> SM_ATOMIC_INT_T;
typedef <i>some unsigned integral type</i> SM_ATOMIC_UINT_T;
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