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  • Committer: Francesco Chemolli
  • Date: 2011-04-27 15:00:38 UTC
  • Revision ID: kinkie@squid-cache.org-20110427150038-kp2qdna80hrv236p
Steamlined SBuf::rawSpace and implemented its companion SBuf::forceSize() method.
Clarified documentation.
Implemented size argument to cow()

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src/SBuf.cci
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/**
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 * copy-on-write: make sure that we are the only holder of the backing store.
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 * If not, reallocate.
 
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 * If not, reallocate. If a new size is specified, and it is greater than the
 
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 * current length, the backing store will be extended as needed
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 * \retval false no grow was needed
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 * \retval true had to copy
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 */
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bool
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SBuf::cow()
 
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SBuf::cow(SBuf::size_type newsize)
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{
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    debugs(SBUF_DEBUGSECTION,DBG_DATA,MYNAME);
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    if (store_->RefCountCount() == 1) {
 
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    if (newsize==npos || newsize < length())
 
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        newsize=length();
 
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    if (store_->RefCountCount() == 1 && newsize==length()) {
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        debugs(SBUF_DEBUGSECTION,DBG_DATA,"no cow needed");
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        ++stats.cowFast;
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        return false;
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    }
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    reAlloc(length());
 
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    reAlloc(newsize);
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    return true;
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}
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