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<font color="#0000ff">// Copyright (c) 2002 David Muse</font>
<font color="#0000ff">// See the COPYING file for more information.</font>
<font color="#a020f0">#ifndef RUDIMENTS_LISTENER_H</font>
<font color="#a020f0">#define RUDIMENTS_LISTENER_H</font>
<font color="#a020f0">#include </font><font color="#ff00ff"><rudiments/private/listenerincludes.h></font>
<font color="#a020f0">#ifdef RUDIMENTS_NAMESPACE</font>
<font color="#2e8b57"><b>namespace</b></font> rudiments {
<font color="#a020f0">#endif</font>
<font color="#2e8b57"><b>typedef</b></font> linkedlist<filedescriptor *> listenerlist;
<font color="#2e8b57"><b>typedef</b></font> linkedlistnode<filedescriptor *> listenerlistnode;
<font color="#0000ff">// The listener class listens on a pool of file descriptors.</font>
<font color="#2e8b57"><b>class</b></font> listenerprivate;
<font color="#2e8b57"><b>class</b></font> listener {
<font color="#a52a2a"><b>public</b></font>:
listener();
<font color="#2e8b57"><b>virtual</b></font> ~listener();
<font color="#2e8b57"><b>void</b></font> addFileDescriptor(filedescriptor *fd);
<font color="#0000ff">// Adds the specified file descriptor to</font>
<font color="#0000ff">// the pool that the listener is listening on.</font>
<font color="#2e8b57"><b>int</b></font> waitForNonBlockingRead(<font color="#2e8b57"><b>long</b></font> sec, <font color="#2e8b57"><b>long</b></font> usec);
<font color="#0000ff">// Causes the application to wait until a read()</font>
<font color="#0000ff">// will proceed without blocking or until "sec"</font>
<font color="#0000ff">// seconds and "usec" microseconds have elapsed.</font>
<font color="#0000ff">//</font>
<font color="#0000ff">// Entering -1 for either parameter causes the</font>
<font color="#0000ff">// method to wait indefinitely. </font>
<font color="#0000ff">//</font>
<font color="#0000ff">// Entering 0 for both parameters causes the</font>
<font color="#0000ff">// method to fall through immediately, returning</font>
<font color="#0000ff">// RESULT_TIMEOUT unless a read() will</font>
<font color="#0000ff">// immediately proceed without blocking.</font>
<font color="#0000ff">//</font>
<font color="#0000ff">// Returns RESULT_ERROR on error, RESULT_TIMEOUT</font>
<font color="#0000ff">// on timeout and otherwise returns the number</font>
<font color="#0000ff">// of file descriptors that are ready to be</font>
<font color="#0000ff">// read from.</font>
<font color="#2e8b57"><b>int</b></font> waitForNonBlockingWrite(<font color="#2e8b57"><b>long</b></font> sec, <font color="#2e8b57"><b>long</b></font> usec);
<font color="#0000ff">// Causes the application to wait until a</font>
<font color="#0000ff">// write() will proceed without blocking or</font>
<font color="#0000ff">// until "sec" seconds and "usec" microseconds</font>
<font color="#0000ff">// have elapsed.</font>
<font color="#0000ff">//</font>
<font color="#0000ff">// Entering -1 for either parameter causes the</font>
<font color="#0000ff">// method to wait indefinitely. </font>
<font color="#0000ff">//</font>
<font color="#0000ff">// Entering 0 for both parameters causes the</font>
<font color="#0000ff">// method to fall through immediately, returning</font>
<font color="#0000ff">// RESULT_TIMEOUT unless a write() will</font>
<font color="#0000ff">// immediately proceed without blocking.</font>
<font color="#0000ff">//</font>
<font color="#0000ff">// Returns RESULT_ERROR on error, RESULT_TIMEOUT</font>
<font color="#0000ff">// on timeout and otherwise returns the number</font>
<font color="#0000ff">// of file descriptors that are ready to be </font>
<font color="#0000ff">// written to.</font>
listenerlist *getReadyList();
<font color="#0000ff">// Returns the list of file descriptors that</font>
<font color="#0000ff">// were ready for read after the last call to</font>
<font color="#0000ff">// waitForNonBlockingRead() or ready for</font>
<font color="#0000ff">// write after the last call to</font>
<font color="#0000ff">// waitForNonBlockingWrite().</font>
<font color="#2e8b57"><b>void</b></font> removeFileDescriptor(filedescriptor *fd);
<font color="#0000ff">// Removes the specified file descriptor from</font>
<font color="#0000ff">// the pool.</font>
<font color="#2e8b57"><b>void</b></font> removeAllFileDescriptors();
<font color="#0000ff">// Removes all file descriptors from the pool.</font>
<font color="#0000ff">// By default, if a wait is occurring and a signal interrupts</font>
<font color="#0000ff">// it, the read or write returns with errno set to EINTR and</font>
<font color="#0000ff">// must be retried. These methods override that behavior.</font>
<font color="#2e8b57"><b>void</b></font> retryInterruptedWaits();
<font color="#0000ff">// Causes waits to automatically retry if</font>
<font color="#0000ff">// interrupted by a signal. This is the default.</font>
<font color="#2e8b57"><b>void</b></font> dontRetryInterruptedWaits();
<font color="#0000ff">// Causes waits not to automatically retry if</font>
<font color="#0000ff">// interrupted by a signal. This is the default.</font>
<font color="#a020f0"> #include </font><font color="#ff00ff"><rudiments/private/listener.h></font>
};
<font color="#a020f0">#ifdef RUDIMENTS_NAMESPACE</font>
}
<font color="#a020f0">#endif</font>
<font color="#a020f0">#endif</font>
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