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<h1>Global Locking Routines</h1><table border=0 cellpadding=0 cellspacing=0>
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<tr><td class="memItemLeft" nowrap align=right valign=top>typedef <a class="el" href="group___a_p_r___global_mutex.html#ga0">apr_global_mutex_t</a> </td><td class="memItemRight" valign=bottom><a class="el" href="group___a_p_r___global_mutex.html#ga0">apr_global_mutex_t</a></td></tr>
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<tr><td class="memItemLeft" nowrap align=right valign=top><a class="el" href="group__apr__errno.html#ga0">apr_status_t</a> </td><td class="memItemRight" valign=bottom><a class="el" href="group___a_p_r___global_mutex.html#ga1">apr_global_mutex_create</a> (<a class="el" href="group___a_p_r___global_mutex.html#ga0">apr_global_mutex_t</a> **mutex, const char *fname, <a class="el" href="group__apr__proc__mutex.html#ga12">apr_lockmech_e</a> mech, <a class="el" href="group__apr__pools.html#ga0">apr_pool_t</a> *pool)</td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top><a class="el" href="group__apr__errno.html#ga0">apr_status_t</a> </td><td class="memItemRight" valign=bottom><a class="el" href="group___a_p_r___global_mutex.html#ga2">apr_global_mutex_child_init</a> (<a class="el" href="group___a_p_r___global_mutex.html#ga0">apr_global_mutex_t</a> **mutex, const char *fname, <a class="el" href="group__apr__pools.html#ga0">apr_pool_t</a> *pool)</td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top><a class="el" href="group__apr__errno.html#ga0">apr_status_t</a> </td><td class="memItemRight" valign=bottom><a class="el" href="group___a_p_r___global_mutex.html#ga3">apr_global_mutex_lock</a> (<a class="el" href="group___a_p_r___global_mutex.html#ga0">apr_global_mutex_t</a> *mutex)</td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top><a class="el" href="group__apr__errno.html#ga0">apr_status_t</a> </td><td class="memItemRight" valign=bottom><a class="el" href="group___a_p_r___global_mutex.html#ga4">apr_global_mutex_trylock</a> (<a class="el" href="group___a_p_r___global_mutex.html#ga0">apr_global_mutex_t</a> *mutex)</td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top><a class="el" href="group__apr__errno.html#ga0">apr_status_t</a> </td><td class="memItemRight" valign=bottom><a class="el" href="group___a_p_r___global_mutex.html#ga5">apr_global_mutex_unlock</a> (<a class="el" href="group___a_p_r___global_mutex.html#ga0">apr_global_mutex_t</a> *mutex)</td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top><a class="el" href="group__apr__errno.html#ga0">apr_status_t</a> </td><td class="memItemRight" valign=bottom><a class="el" href="group___a_p_r___global_mutex.html#ga6">apr_global_mutex_destroy</a> (<a class="el" href="group___a_p_r___global_mutex.html#ga0">apr_global_mutex_t</a> *mutex)</td></tr>
<tr><td class="memItemLeft" nowrap align=right valign=top><a class="el" href="group__apr__pools.html#ga0">apr_pool_t</a> * </td><td class="memItemRight" valign=bottom><a class="el" href="group___a_p_r___global_mutex.html#ga7">apr_global_mutex_pool_get</a> (const <a class="el" href="group___a_p_r___global_mutex.html#ga0">apr_global_mutex_t</a> *theglobal_mutex)</td></tr>
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<hr><h2>Typedef Documentation</h2>
<a class="anchor" name="ga0" doxytag="apr_global_mutex.h::apr_global_mutex_t" ></a><p>
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<td class="md" nowrap valign="top"> typedef struct <a class="el" href="group___a_p_r___global_mutex.html#ga0">apr_global_mutex_t</a> <a class="el" href="group___a_p_r___global_mutex.html#ga0">apr_global_mutex_t</a> </td>
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Opaque global mutex structure. </td>
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<hr><h2>Function Documentation</h2>
<a class="anchor" name="ga2" doxytag="apr_global_mutex.h::apr_global_mutex_child_init" ></a><p>
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<td class="md" nowrap valign="top"> <a class="el" href="group__apr__errno.html#ga0">apr_status_t</a> apr_global_mutex_child_init </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group___a_p_r___global_mutex.html#ga0">apr_global_mutex_t</a> ** </td>
<td class="mdname" nowrap> <em>mutex</em>, </td>
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<td class="md" nowrap>const char * </td>
<td class="mdname" nowrap> <em>fname</em>, </td>
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<td class="md" nowrap><a class="el" href="group__apr__pools.html#ga0">apr_pool_t</a> * </td>
<td class="mdname" nowrap> <em>pool</em></td>
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<td class="md">) </td>
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Re-open a mutex in a child process. <dl compact><dt><b>Parameters:</b></dt><dd>
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<tr><td></td><td valign=top><em>mutex</em> </td><td>The newly re-opened mutex structure. </td></tr>
<tr><td></td><td valign=top><em>fname</em> </td><td>A file name to use if the mutex mechanism requires one. This argument should always be provided. The mutex code itself will determine if it should be used. This filename should be the same one that was passed to <a class="el" href="group___a_p_r___global_mutex.html#ga1">apr_global_mutex_create()</a>. </td></tr>
<tr><td></td><td valign=top><em>pool</em> </td><td>The pool to operate on. </td></tr>
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<dl compact><dt><b>Remarks:</b></dt><dd>This function must be called to maintain portability, even if the underlying lock mechanism does not require it. </dd></dl>
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<a class="anchor" name="ga1" doxytag="apr_global_mutex.h::apr_global_mutex_create" ></a><p>
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<td class="md" nowrap valign="top"> <a class="el" href="group__apr__errno.html#ga0">apr_status_t</a> apr_global_mutex_create </td>
<td class="md" valign="top">( </td>
<td class="md" nowrap valign="top"><a class="el" href="group___a_p_r___global_mutex.html#ga0">apr_global_mutex_t</a> ** </td>
<td class="mdname" nowrap> <em>mutex</em>, </td>
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<td class="md" nowrap>const char * </td>
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<td class="md" nowrap><a class="el" href="group__apr__proc__mutex.html#ga12">apr_lockmech_e</a> </td>
<td class="mdname" nowrap> <em>mech</em>, </td>
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<td class="md" nowrap><a class="el" href="group__apr__pools.html#ga0">apr_pool_t</a> * </td>
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Create and initialize a mutex that can be used to synchronize both processes and threads. Note: There is considerable overhead in using this API if only cross-process or cross-thread mutual exclusion is required. See <a class="el" href="apr__proc__mutex_8h.html">apr_proc_mutex.h</a> and <a class="el" href="apr__thread__mutex_8h.html">apr_thread_mutex.h</a> for more specialized lock routines. <dl compact><dt><b>Parameters:</b></dt><dd>
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<tr><td></td><td valign=top><em>mutex</em> </td><td>the memory address where the newly created mutex will be stored. </td></tr>
<tr><td></td><td valign=top><em>fname</em> </td><td>A file name to use if the lock mechanism requires one. This argument should always be provided. The lock code itself will determine if it should be used. </td></tr>
<tr><td></td><td valign=top><em>mech</em> </td><td>The mechanism to use for the interprocess lock, if any; one of <pre>
APR_LOCK_FCNTL
APR_LOCK_FLOCK
APR_LOCK_SYSVSEM
APR_LOCK_POSIXSEM
APR_LOCK_PROC_PTHREAD
APR_LOCK_DEFAULT pick the default mechanism for the platform
</pre> </td></tr>
<tr><td></td><td valign=top><em>pool</em> </td><td>the pool from which to allocate the mutex. </td></tr>
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<dl compact><dt><b>Warning:</b></dt><dd>Check APR_HAS_foo_SERIALIZE defines to see if the platform supports APR_LOCK_foo. Only APR_LOCK_DEFAULT is portable. </dd></dl>
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