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<h1>File Lock Types<br>
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[<a class="el" href="group__apr__file__io.html">File I/O Handling Functions</a>]</small>
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<tr><td colspan="2"><br><h2>Defines</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__apr__file__lock__types.html#g5e0fe164463580cb9a2bbcfa0afd35ce">APR_FLOCK_SHARED</a> 1</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__apr__file__lock__types.html#g87fa50f835bdb02196dec1d6f4083a71">APR_FLOCK_EXCLUSIVE</a> 2</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__apr__file__lock__types.html#gd0ea7dd0e13efbd7c00b3b0166d56679">APR_FLOCK_TYPEMASK</a> 0x000F</td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group__apr__file__lock__types.html#g40939453039edf057a6be3bfaa417d37">APR_FLOCK_NONBLOCK</a> 0x0010</td></tr>
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<hr><h2>Define Documentation</h2>
<a class="anchor" name="g87fa50f835bdb02196dec1d6f4083a71"></a><!-- doxytag: member="apr_file_io.h::APR_FLOCK_EXCLUSIVE" ref="g87fa50f835bdb02196dec1d6f4083a71" args="" -->
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<td class="memname">#define APR_FLOCK_EXCLUSIVE 2 </td>
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Exclusive lock. Only one process may hold an exclusive lock at any given time. This is analogous to a "write lock".
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<a class="anchor" name="g40939453039edf057a6be3bfaa417d37"></a><!-- doxytag: member="apr_file_io.h::APR_FLOCK_NONBLOCK" ref="g40939453039edf057a6be3bfaa417d37" args="" -->
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<td class="memname">#define APR_FLOCK_NONBLOCK 0x0010 </td>
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do not block while acquiring the file lock
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<a class="anchor" name="g5e0fe164463580cb9a2bbcfa0afd35ce"></a><!-- doxytag: member="apr_file_io.h::APR_FLOCK_SHARED" ref="g5e0fe164463580cb9a2bbcfa0afd35ce" args="" -->
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<td class="memname">#define APR_FLOCK_SHARED 1 </td>
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Shared lock. More than one process or thread can hold a shared lock at any given time. Essentially, this is a "read lock", preventing writers from establishing an exclusive lock.
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<a class="anchor" name="gd0ea7dd0e13efbd7c00b3b0166d56679"></a><!-- doxytag: member="apr_file_io.h::APR_FLOCK_TYPEMASK" ref="gd0ea7dd0e13efbd7c00b3b0166d56679" args="" -->
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<td class="memname">#define APR_FLOCK_TYPEMASK 0x000F </td>
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mask to extract lock type
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