group__apr__thread__cond.html

apr函数库使用手册

<a class="anchor" name="ga7" doxytag="apr_thread_cond.h::apr_thread_cond_pool_get" ></a><p>
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          <td class="md" nowrap valign="top"> <a class="el" href="group__apr__pools.html#ga0">apr_pool_t</a>* apr_thread_cond_pool_get           </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top">const <a class="el" href="group__apr__thread__cond.html#ga0">apr_thread_cond_t</a> *&nbsp;</td>
          <td class="mdname1" valign="top" nowrap> <em>thethread_cond</em>          </td>
          <td class="md" valign="top">&nbsp;)&nbsp;</td>
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Get the pool used by this thread_cond. <dl compact><dt><b>Returns:</b></dt><dd>apr_pool_t the pool </dd></dl>
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<a class="anchor" name="ga4" doxytag="apr_thread_cond.h::apr_thread_cond_signal" ></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_thread_cond_signal           </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top"><a class="el" href="group__apr__thread__cond.html#ga0">apr_thread_cond_t</a> *&nbsp;</td>
          <td class="mdname1" valign="top" nowrap> <em>cond</em>          </td>
          <td class="md" valign="top">&nbsp;)&nbsp;</td>
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Signals a single thread, if one exists, that is blocking on the given condition variable. That thread is then scheduled to wake up and acquire the associated mutex. Although it is not required, if predictable scheduling is desired, that mutex must be locked while calling this function. <dl compact><dt><b>Parameters:</b></dt><dd>
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    <tr><td></td><td valign=top><em>cond</em>&nbsp;</td><td>the condition variable on which to produce the signal. </td></tr>
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<a class="anchor" name="ga3" doxytag="apr_thread_cond.h::apr_thread_cond_timedwait" ></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_thread_cond_timedwait           </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top"><a class="el" href="group__apr__thread__cond.html#ga0">apr_thread_cond_t</a> *&nbsp;</td>
          <td class="mdname" nowrap> <em>cond</em>, </td>
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          <td class="md" nowrap><a class="el" href="group__apr__thread__mutex.html#ga0">apr_thread_mutex_t</a> *&nbsp;</td>
          <td class="mdname" nowrap> <em>mutex</em>, </td>
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          <td class="md" nowrap><a class="el" href="group__apr__time.html#ga3">apr_interval_time_t</a>&nbsp;</td>
          <td class="mdname" nowrap> <em>timeout</em></td>
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          <td class="md">)&nbsp;</td>
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Put the active calling thread to sleep until signaled to wake up or the timeout is reached. Each condition variable must be associated with a mutex, and that mutex must be locked before calling this function, or the behavior will be undefined. As the calling thread is put to sleep, the given mutex will be simultaneously released; and as this thread wakes up the lock is again simultaneously acquired. <dl compact><dt><b>Parameters:</b></dt><dd>
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    <tr><td></td><td valign=top><em>cond</em>&nbsp;</td><td>the condition variable on which to block. </td></tr>
    <tr><td></td><td valign=top><em>mutex</em>&nbsp;</td><td>the mutex that must be locked upon entering this function, is released while the thread is asleep, and is again acquired before returning from this function. </td></tr>
    <tr><td></td><td valign=top><em>timeout</em>&nbsp;</td><td>The amount of time in microseconds to wait. This is a maximum, not a minimum. If the condition is signaled, we will wake up before this time, otherwise the error APR_TIMEUP is returned. </td></tr>
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<a class="anchor" name="ga2" doxytag="apr_thread_cond.h::apr_thread_cond_wait" ></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_thread_cond_wait           </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top"><a class="el" href="group__apr__thread__cond.html#ga0">apr_thread_cond_t</a> *&nbsp;</td>
          <td class="mdname" nowrap> <em>cond</em>, </td>
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          <td class="md" nowrap><a class="el" href="group__apr__thread__mutex.html#ga0">apr_thread_mutex_t</a> *&nbsp;</td>
          <td class="mdname" nowrap> <em>mutex</em></td>
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          <td class="md">)&nbsp;</td>
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Put the active calling thread to sleep until signaled to wake up. Each condition variable must be associated with a mutex, and that mutex must be locked before calling this function, or the behavior will be undefined. As the calling thread is put to sleep, the given mutex will be simultaneously released; and as this thread wakes up the lock is again simultaneously acquired. <dl compact><dt><b>Parameters:</b></dt><dd>
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    <tr><td></td><td valign=top><em>cond</em>&nbsp;</td><td>the condition variable on which to block. </td></tr>
    <tr><td></td><td valign=top><em>mutex</em>&nbsp;</td><td>the mutex that must be locked upon entering this function, is released while the thread is asleep, and is again acquired before returning from this function. </td></tr>
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