00001 /******************************************************************************/ 00002 /* */ 00003 /* X r d X r o o t d P i o . c c */ 00004 /* */ 00005 /* (c) 2007 by the Board of Trustees of the Leland Stanford, Jr., University */ 00006 /* All Rights Reserved */ 00007 /* Produced by Andrew Hanushevsky for Stanford University under contract */ 00008 /* DE-AC02-76-SFO0515 with the Department of Energy */ 00009 /******************************************************************************/ 00010 00011 // $Id: XrdXrootdPio.cc 30949 2009-11-02 16:37:58Z ganis $ 00012 00013 const char *XrdXrootdPioCVSID = "$Id: XrdXrootdPio.cc 30949 2009-11-02 16:37:58Z ganis $"; 00014 00015 #include "XrdXrootd/XrdXrootdPio.hh" 00016 00017 /******************************************************************************/ 00018 /* S t a t i c V a r i a b l e s */ 00019 /******************************************************************************/ 00020 00021 XrdSysMutex XrdXrootdPio::myMutex; 00022 XrdXrootdPio *XrdXrootdPio::Free = 0; 00023 int XrdXrootdPio::FreeNum = 0; 00024 00025 /******************************************************************************/ 00026 /* A l l o c */ 00027 /******************************************************************************/ 00028 00029 XrdXrootdPio *XrdXrootdPio::Alloc(int Num) 00030 { 00031 XrdXrootdPio *lqp, *qp=0; 00032 00033 00034 // Allocate from the free stack 00035 // 00036 myMutex.Lock(); 00037 if ((qp = Free)) 00038 {do {FreeNum--; Num--; lqp = Free;} 00039 while((Free = Free->Next) && Num); 00040 lqp->Next = 0; 00041 } 00042 myMutex.UnLock(); 00043 00044 // Allocate additional if we have not allocated enough 00045 // 00046 while(Num--) qp = new XrdXrootdPio(qp); 00047 00048 // All done 00049 // 00050 return qp; 00051 } 00052 00053 /******************************************************************************/ 00054 /* R e c y c l e */ 00055 /******************************************************************************/ 00056 00057 void XrdXrootdPio::Recycle() 00058 { 00059 00060 // Check if we can hold on to this or must delete it 00061 // 00062 myMutex.Lock(); 00063 if (FreeNum >= FreeMax) {myMutex.UnLock(); delete this; return;} 00064 00065 // Clean this up and push the element on the free stack 00066 // 00067 Free = Clear(Free); FreeNum++; 00068 myMutex.UnLock(); 00069 }
1.5.1