/usr/include/rutil/Poll.hxx is in libresiprocate-1.11-dev 1:1.11.0~beta5-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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#define RESIP_POLL_HXX
#include <memory>
#include <vector>
namespace resip {
///////////////////////////////////////////////////////////////////////////////
class PollImpl;
/**
@brief This class abstracts the Unix system call "poll".
It offers implementations in terms of "poll" itself, "epoll", and "select".
(Respectively #ifdef'd by RESIP_POLL_IMPL_POLL, RESIP_POLL_IMPL_SELECT, and
RESIP_POLL_IMPL_EPOLL.)
File descriptors are wrapped by inner class "Poll::FDEntry".
The actual "poll" call is represented by method "wait", or if an application
wants to control the system call directly, it can instead use methods
"beforeExternWait", "setEntryFDStateForExternWait", and "afterExternWait".
(The latter are selected by #define-ing RESIP_POLL_EXTERN.)
*/
class Poll {
public:
class FDEntry {
friend class Poll;
public:
typedef unsigned short StateBitMask; // FDStateBitMask | ResipStateBitMask.
enum FDStateBitMaskEnum {
fdsbmReadable = 0x0001, // (POLLIN)
fdsbmWritable = 0x0004, // (POLLOUT)
fdsbmError = 0x0008, // (POLLERR)
fdsbmAll = Poll::FDEntry::fdsbmReadable |
Poll::FDEntry::fdsbmWritable |
Poll::FDEntry::fdsbmError
};
typedef StateBitMask FDStateBitMask;
enum ResipStateBitMaskEnum {
rsbmIsTransport = 0x0040,
rsbmIsWritePending = 0x0080
};
typedef StateBitMask ResipStateBitMask;
private:
static
int
compare(const Poll::FDEntry * leftFDEntry,
const Poll::FDEntry * rightFDEntry);
// Fields:
Poll * _poll;
int/*FD*/ _fd;
Poll::FDEntry::StateBitMask _stateBitMask;
unsigned short _index; // Within "_poll->_fdEntryVector".
public:
//constructor
FDEntry(Poll * poll,
bool isTransport,
int/*FD*/ fd);
//destructor
virtual ~FDEntry();
inline
int//FD
getFD() const
{
return _fd;
}
inline
Poll::FDEntry::StateBitMask
getStateBitMask() const
{
return _stateBitMask;
}
void
clearFDState();
protected:
void
setIsWritePending(bool isWritePending);
virtual void doRead() {};
virtual void doWrite() {};
virtual void doError() {};
private:
// Copy constructor: declared but not defined
FDEntry(const Poll::FDEntry & from);
// Assignment: declared but not defined
Poll::FDEntry &
operator=(const Poll::FDEntry & from);
};
friend class Poll::FDEntry;
private:
std::auto_ptr<PollImpl> mImpl;
public:
/*
"waitResult" is the result of method "wait" or "afterExternWait".
Returns the index of the entry with the smallest file descriptor >= "fd" in
"waitResult", or "waitResult.size()" if none exists.
*/
static
int
findFDInWaitResult(int/*FD*/ fd,
const std::vector<Poll::FDEntry *> & waitResult);
//constructor
Poll();
//destructor
~Poll();
#ifdef RESIP_POLL_EXTERN // {
// The result is the set of entries in this poll object.
const std::vector<Poll::FDEntry *> &
beforeExternWait();
/*
If "fd" has no entry in this poll object, ignore it and return false.
Otherwise, set the entry's FD state from "fdStateBitMask" and return true.
If the same "fd" is passed in multiple times, the "fdStateBitMask" are
or-ed together.
*/
bool
setEntryFDStateForExternWait(int/*FD*/ fd,
Poll::FDEntry::StateBitMask fdStateBitMask);
// The result is identical to that of method "wait".
const std::vector<Poll::FDEntry *> &
afterExternWait();
#else //!defined(RESIP_POLL_EXTERN) } {
/*
Wait for I/O on any of this poll object's entry's file descriptors.
More precisely, wait for the file descriptor of any entry with a pending
write to be writable or for any entry's file descriptor to have readable
input or an error.
If "timeoutMilliSeconds" is negative, it means wait indefinitely, otherwise
it indicates the maximum period to wait.
The result is an array of the entries for the file descriptors that are
readable, writable, or error, as specified by each entry's FD state.
The result contains no duplicates and is sorted by file descriptor.
(To service file descriptors with round-robin prioritization, remember the
last file descriptor serviced and use method "Poll::findFDInWaitResult" to
find the index in the result array of the highest priority entry.)
The result is valid until the next call to this method, method
"beforeExternWait", or the destructor.
At some point before then, for each entry in the result, method
"Poll::FDEntry::clearFDState" must be called.
*/
const std::vector<Poll::FDEntry *> &
wait(int timeoutMilliSeconds);
#endif //!defined(RESIP_POLL_EXTERN) }
private:
// Copy constructor: declared but not defined
Poll(const Poll & from);
// Assignment: declared but not defined
Poll &
operator=(const Poll & from);
};
///////////////////////////////////////////////////////////////////////////////
} // namespace resip
#endif //!defined(RESIP_POLL_HXX)
/* ====================================================================
* The Vovida Software License, Version 1.0
*
* Copyright (c) 2000-2005 Jacob Butcher
*
* Redistribution and use in source and binary forms, with or without
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*
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* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
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* and "Vovida Open Communication Application Library (VOCAL)" must
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* permission, please contact vocal@vovida.org.
*
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