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* Update for 2.1 release; add wiki link
author cannam
date Fri, 25 Sep 2009 15:40:18 +0000
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<h1>plugguard.h File Reference</h1>
<p>
<a href="plugguard_8h-source.html">Go to the source code of this file.</a><table border="0" cellpadding="0" cellspacing="0">
<tr><td></td></tr>
<tr><td colspan="2"><br><h2>Defines</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">#define&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="plugguard_8h.html#3bf4e97f131677e5e1505a7a9582d68a">_VAMP_IN_PLUGINSDK</a>&nbsp;&nbsp;&nbsp;1</td></tr>

<tr><td class="mdescLeft">&nbsp;</td><td class="mdescRight">Normal usage should be:.  <a href="#3bf4e97f131677e5e1505a7a9582d68a"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">#define&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="plugguard_8h.html#1a2724ea453971288d3218e4eab3072c">_VAMP_SDK_PLUGSPACE_BEGIN</a>(h)</td></tr>

<tr><td class="memItemLeft" nowrap align="right" valign="top">#define&nbsp;</td><td class="memItemRight" valign="bottom"><a class="el" href="plugguard_8h.html#c879bb1077ecc6132ea3581ef9033753">_VAMP_SDK_PLUGSPACE_END</a>(h)</td></tr>

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<hr><h2>Define Documentation</h2>
<a class="anchor" name="3bf4e97f131677e5e1505a7a9582d68a"></a><!-- doxytag: member="plugguard.h::_VAMP_IN_PLUGINSDK" ref="3bf4e97f131677e5e1505a7a9582d68a" args="" -->
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          <td class="memname">#define _VAMP_IN_PLUGINSDK&nbsp;&nbsp;&nbsp;1          </td>
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<p>
Normal usage should be:. 
<p>
<ul>
<li>Plugins include <a class="el" href="vamp-sdk_2Plugin_8h.html">vamp-sdk/Plugin.h</a> or <a class="el" href="vamp-sdk_2PluginBase_8h.html">vamp-sdk/PluginBase.h</a>. These files include this header, which specifies an appropriate namespace for the plugin classes to avoid any risk of conflict with non-plugin class implementations in the host on load.</li></ul>
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<ul>
<li>Hosts include <a class="el" href="vamp-hostsdk_2Plugin_8h.html">vamp-hostsdk/Plugin.h</a>, <a class="el" href="vamp-hostsdk_2PluginBase_8h.html">vamp-hostsdk/PluginBase.h</a>, vamp-hostsdk/PluginHostAdapter, <a class="el" href="PluginLoader_8h.html">vamp-hostsdk/PluginLoader.h</a> etc. These files include <a class="el" href="hostguard_8h.html">vamp-hostsdk/hostguard.h</a>, which makes a note that we are in a host. A file such as <a class="el" href="vamp-hostsdk_2Plugin_8h.html">vamp-hostsdk/Plugin.h</a> then simply includes <a class="el" href="vamp-sdk_2Plugin_8h.html">vamp-sdk/Plugin.h</a>, and this guard header takes notice of the fact that it has been included from a host and leaves the plugin namespace unset.</li></ul>
<p>
Problems will occur when a host includes files directly from the vamp-sdk directory. There are two reasons this might happen: mistake, perhaps owing to ignorance of the fact that this isn't allowed (particularly since it was the normal mechanism in v1 of the SDK); and a wish to incorporate plugin code directly into the host rather than having to load it.<p>
What if the host does include a vamp-sdk header by mistake? We can catch it if it's included before something from vamp-hostsdk. If it's included after something from vamp-hostsdk, it will work OK anyway. The remaining problem case is where nothing from vamp-hostsdk is included in the same file. We can't catch that. 
<p>Definition at line <a class="el" href="plugguard_8h-source.html#l00072">72</a> of file <a class="el" href="plugguard_8h-source.html">plugguard.h</a>.</p>

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<a class="anchor" name="1a2724ea453971288d3218e4eab3072c"></a><!-- doxytag: member="plugguard.h::_VAMP_SDK_PLUGSPACE_BEGIN" ref="1a2724ea453971288d3218e4eab3072c" args="(h)" -->
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          <td class="memname">#define _VAMP_SDK_PLUGSPACE_BEGIN          </td>
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          <td class="paramtype">h&nbsp;</td>
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          <td>&nbsp;)&nbsp;</td>
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<p>Definition at line <a class="el" href="plugguard_8h-source.html#l00075">75</a> of file <a class="el" href="plugguard_8h-source.html">plugguard.h</a>.</p>

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<a class="anchor" name="c879bb1077ecc6132ea3581ef9033753"></a><!-- doxytag: member="plugguard.h::_VAMP_SDK_PLUGSPACE_END" ref="c879bb1077ecc6132ea3581ef9033753" args="(h)" -->
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          <td class="memname">#define _VAMP_SDK_PLUGSPACE_END          </td>
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          <td class="paramtype">h&nbsp;</td>
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<p>Definition at line <a class="el" href="plugguard_8h-source.html#l00076">76</a> of file <a class="el" href="plugguard_8h-source.html">plugguard.h</a>.</p>

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