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WvShmZone Class Reference

#include <wvshmzone.h>

Inherits WvError.

Collaboration diagram for WvShmZone:

[legend]
List of all members.

Detailed Description

Represents a shared-memory zone via mmap().

If you create one of these, its buf element will be shared across fork() and you can use it for various things such as a circular queue, semaphore, etc.

Definition at line 20 of file wvshmzone.h.

Public Member Functions

 WvShmZone (size_t size)
 Creates a shared memory zone.

 ~WvShmZone ()
virtual bool isok () const
 By default, returns true if geterr() == 0.

virtual int geterr () const
 If isok() is false, return the system error number corresponding to the error, -1 for a special error string (which you can obtain with errstr()) or 0 on end of file.

virtual WvString errstr () const
virtual void seterr (int _errnum)
 Set the errnum variable -- we have an error.

void seterr (WvStringParm specialerr)
void seterr (WVSTRING_FORMAT_DECL)
void seterr (const WvError &err)
void noerr ()
 Reset our error state - there's no error condition anymore.


Public Attributes

int size

Protected Attributes

int errnum
WvString errstring


Constructor & Destructor Documentation

WvShmZone::WvShmZone size_t  size  ) 
 

Creates a shared memory zone.

"size" is the size of the zone in bytes

Definition at line 16 of file wvshmzone.cc.

References WvError::seterr().

WvShmZone::~WvShmZone  ) 
 

Definition at line 40 of file wvshmzone.cc.


Member Function Documentation

WvString WvError::errstr  )  const [virtual, inherited]
 

Reimplemented in WvHTTPStream, and WvStreamClone.

Definition at line 20 of file wverror.cc.

References WvError::errnum, and WvError::errstring.

Referenced by UniIniGen::commit(), WvStreamClone::errstr(), main(), UniIniGen::refresh(), WvError::seterr(), UniConfDaemon::setupsslsocket(), UniConfDaemon::setuptcpsocket(), UniConfDaemon::setupunixsocket(), WvX509Mgr::WvX509Mgr(), and WvHttpPool::~WvHttpPool().

virtual int WvError::geterr  )  const [inline, virtual, inherited]
 

If isok() is false, return the system error number corresponding to the error, -1 for a special error string (which you can obtain with errstr()) or 0 on end of file.

If isok() is true, returns an undefined number.

Reimplemented in WvHTTPStream, and WvStreamClone.

Definition at line 44 of file wverror.h.

References WvError::errnum.

Referenced by UniIniGen::commit(), WvStreamClone::geterr(), WvEncoderStream::isok(), WvConf::load_file(), WvLockDev::lock(), main(), WvHTTPStream::pre_select(), UniIniGen::refresh(), WvConf::save(), WvError::seterr(), WvMagicCircle::WvMagicCircle(), and WvHttpPool::~WvHttpPool().

virtual bool WvError::isok  )  const [inline, virtual, inherited]
 

By default, returns true if geterr() == 0.

Might be overridden so that isok() == false even though no error code has been specified.

Reimplemented in UniClientConn, WvBufStream, WvDailyEvent, WvDsp, WvEncoderStream, WvFDStream, WvHTTPStream, WvIStreamList, WvLog, WvPamStream, WvSSLStream, IWvStream, WvStream, WvStreamClone, WvStreamList, WvTCPConn, WvTimeoutStream, WvTimeStream, WvFileWatcher, and UniConfDaemon.

Definition at line 35 of file wverror.h.

References WvError::errnum.

Referenced by WvBdbHashBase::add(), WvBdbHashBase::exists(), WvBdbHashBase::find(), WvStreamList::isok(), WvStream::isok(), main(), WvBdbHash< K, D >::Iter::next(), WvBdbHashBase::IterBase::next(), WvBdbHashBase::remove(), WvRSAEncoder::WvRSAEncoder(), WvRSAStream::WvRSAStream(), WvX509Mgr::WvX509Mgr(), and WvBdbHashBase::zap().

void WvError::noerr  )  [inline, inherited]
 

Reset our error state - there's no error condition anymore.

Definition at line 65 of file wverror.h.

References WvError::errnum.

Referenced by WvBdbHashBase::opendb(), and WvError::WvError().

void WvError::seterr const WvError err  )  [inherited]
 

Definition at line 64 of file wverror.cc.

References WvError::errstr(), WvError::geterr(), and WvError::seterr().

void WvError::seterr WVSTRING_FORMAT_DECL   )  [inline, inherited]
 

Reimplemented in WvStream.

Definition at line 60 of file wverror.h.

References WvError::seterr(), and WVSTRING_FORMAT_CALL.

void WvError::seterr WvStringParm  specialerr  )  [inherited]
 

Reimplemented in WvStream.

Definition at line 54 of file wverror.cc.

References WvError::errnum, WvError::errstring, WvError::seterr(), and WvStringParm.

void WvError::seterr int  _errnum  )  [virtual, inherited]
 

Set the errnum variable -- we have an error.

If called more than once, seterr() doesn't change the error code away from the previous one. That way, we remember the _original_ cause of our problems.

Subclasses may want to override seterr(int) to shut themselves down (eg. WvStream::close()) when an error condition is set.

Note that seterr(WvString) will call seterr(-1).

Reimplemented in WvStream.

Definition at line 47 of file wverror.cc.

References WvError::errnum.

Referenced by WvBdbHashBase::add(), WvBdbHashBase::closedb(), WvBdbHashBase::exists(), WvBdbHashBase::find(), main(), WvBdbHashBase::IterBase::next(), WvBdbHashBase::opendb(), WvBdbHashBase::remove(), WvStream::seterr(), WvError::seterr(), WvMagicCircle::WvMagicCircle(), WvRSAKey::WvRSAKey(), WvShmZone(), and WvBdbHashBase::zap().


Member Data Documentation

void* WvShmZone::buf
 

Definition at line 38 of file wvshmzone.h.

char* WvShmZone::cbuf
 

Definition at line 39 of file wvshmzone.h.

Referenced by WvMagicCircle::WvMagicCircle().

int WvError::errnum [protected, inherited]
 

Definition at line 22 of file wverror.h.

Referenced by WvError::errstr(), WvError::geterr(), WvError::isok(), WvError::noerr(), and WvError::seterr().

WvString WvError::errstring [protected, inherited]
 

Definition at line 23 of file wverror.h.

Referenced by WvError::errstr(), and WvError::seterr().

int WvShmZone::size
 

Definition at line 35 of file wvshmzone.h.

unsigned char* WvShmZone::ucbuf
 

Definition at line 40 of file wvshmzone.h.


The documentation for this class was generated from the following files:
Generated on Sat Mar 13 14:59:25 2004 for WvStreams by doxygen 1.3.6-20040222