/******************************************************************************/ /* */ /* X r d C m s P r e p A r g s . c c */ /* */ /* (c) 2007 by the Board of Trustees of the Leland Stanford, Jr., University */ /* All Rights Reserved */ /* Produced by Andrew Hanushevsky for Stanford University under contract */ /* DE-AC02-76-SFO0515 with the Department of Energy */ /* */ /* This file is part of the XRootD software suite. */ /* */ /* XRootD is free software: you can redistribute it and/or modify it under */ /* the terms of the GNU Lesser General Public License as published by the */ /* Free Software Foundation, either version 3 of the License, or (at your */ /* option) any later version. */ /* */ /* XRootD is distributed in the hope that it will be useful, but WITHOUT */ /* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or */ /* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public */ /* License for more details. */ /* */ /* You should have received a copy of the GNU Lesser General Public License */ /* along with XRootD in a file called COPYING.LESSER (LGPL license) and file */ /* COPYING (GPL license). If not, see . */ /* */ /* The copyright holder's institutional names and contributor's names may not */ /* be used to endorse or promote products derived from this software without */ /* specific prior written permission of the institution or contributor. */ /******************************************************************************/ #include #include #include #include "XrdCms/XrdCmsConfig.hh" #include "XrdCms/XrdCmsPrepare.hh" #include "XrdCms/XrdCmsPrepArgs.hh" using namespace XrdCms; /******************************************************************************/ /* S t a t i c V a r i a b l e s */ /******************************************************************************/ XrdSysMutex XrdCmsPrepArgs::PAQueue; XrdSysSemaphore XrdCmsPrepArgs::PAReady(0); XrdCmsPrepArgs *XrdCmsPrepArgs::First = 0; XrdCmsPrepArgs *XrdCmsPrepArgs::Last = 0; int XrdCmsPrepArgs::isIdle= 1; /******************************************************************************/ /* C o n s t r u c t o r */ /******************************************************************************/ XrdCmsPrepArgs::XrdCmsPrepArgs(XrdCmsRRData &Arg) : XrdJob("prepare") { // Copy variable pointers and steal teh data buffer behind them // Request = Arg.Request; Request.streamid = 0; Ident = Arg.Ident; reqid = Arg.Reqid; notify = Arg.Notify; prty = Arg.Prty; mode = Arg.Mode; path = Arg.Path; pathlen = Arg.PathLen; opaque = Arg.Opaque; options = Arg.Request.modifier; Data = Arg.Buff; Arg.Buff = 0; Arg.Blen = 0; // Fill out co-location information // if (options & CmsPrepAddRequest::kYR_stage && options & CmsPrepAddRequest::kYR_coloc && prty) {clPath = prty; while(*clPath && *clPath != '/') clPath++; if (*clPath != '/') clPath = 0; } else clPath = 0; // Fill out the iovec // ioV[0].iov_base = (char *)&Request; ioV[0].iov_len = sizeof(Request); ioV[1].iov_base = Data; ioV[1].iov_len = Arg.Dlen; } /******************************************************************************/ /* g e t R e q u e s t */ /******************************************************************************/ XrdCmsPrepArgs *XrdCmsPrepArgs::getRequest() // Static { XrdCmsPrepArgs *parg; // Wait for a request // do {PAQueue.Lock(); if ((parg = First)) if (parg == Last) First = Last = 0; else First = parg->Next; else {isIdle = 1; PAQueue.UnLock(); PAReady.Wait();} } while(parg == 0); isIdle = 0; PAQueue.UnLock(); return parg; } /******************************************************************************/ /* P r o c e s s */ /*****************************************************************************/ // This static entry is started on a thread during configuration // void XrdCmsPrepArgs::Process() { XrdCmsPrepArgs *aP; // Process all queued prepare arguments. If we have data then we do this // for real. Otherwise, simply do a server selection and, if need be, tell // the server to stage the file. // if (Config.DiskOK) do {aP = getRequest(); PrepQ.Prepare(aP); delete aP; } while(1); else do {getRequest()->DoIt(); } while(1); } /******************************************************************************/ /* Q u e u e */ /******************************************************************************/ void XrdCmsPrepArgs::Queue() { // Lock the queue and add the element and post the waiter // PAQueue.Lock(); if (First) Last->Next = this; else First = this; Last = this; if (isIdle) PAReady.Post(); PAQueue.UnLock(); }