hsm_FHpVecMgr Class Reference
[Classes for managing object list]

#include <hsm_FHcache.h>

Inheritance diagram for hsm_FHpVecMgr:

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Collaboration diagram for hsm_FHpVecMgr:

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List of all members.

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Detailed Description

File header pointer vector manager.

Definition at line 35 of file hsm_FHcache.h.

Public Member Functions
	~hsm_FHpVecMgr ()
void	Insert (hsm_FileHeader *a_FileHObj)
	Insert must be used ONLY if GetFH return NULL Doesn't check if FH olready exist and put &FH at the end of the vector Insert method increase reference by 2.
void	InsertDirWithTest (hsm_FileHeader **a_FileHObj)
void	Remove (register hsm_FileHeader *a_FileHObj)
	Find proper FH by serching its addres in container if FH has only one reference then is removed from cache othervice not iterator possition is replaced with last FH in vector or just remove Fh if it's last.
bool	RemoveLastButOne (register hsm_FileHeader *a_FileHObj)
hsm_FileHeader *	GetFH (ivd_GenInode_t a_generalInode)
	search for file header NOTE if fount then referece will be increased to prevent from delete
Public Attributes
	log_CLASSID_m
Private Attributes
cmn_Mutex	m_FHpVec_x

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Constructor & Destructor Documentation

hsm_FHpVecMgr::~hsm_FHpVecMgr

(

)

Definition at line 44 of file hsm_FHcache.cpp.

References NULL.

                              {
//    log_FUNC_m(hsm_FHcache);
    hsm_FileHeader* *ip = &(*begin());
    hsm_FileHeader* *ep = &(*end()); // addres of past the end
    for (; ip < ep; ip++) {
        if (*ip != NULL) {
            (*ip)->DecrRef();
        }
    }
    //for (hsm_FH_p_vi iter = begin(); iter != end(); iter++) {
    //     if (*iter != NULL) {
    //         (*iter)->DecrRef();
    //     }
    //}
}

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Member Function Documentation

void hsm_FHpVecMgr::Insert

(

hsm_FileHeader *

a_FileHObj

)

Insert must be used ONLY if GetFH return NULL Doesn't check if FH olready exist and put &FH at the end of the vector Insert method increase reference by 2.

Definition at line 62 of file hsm_FHcache.cpp.

References hsm_FileHeader::IncrRef(), log_FUNC_m, and m_FHpVec_x.

                                                     {
    log_FUNC_m(Insert);
    cmn_MutexLock l(m_FHpVec_x);
    insert(end(), a_FileHObj); // here is oposite    
    a_FileHObj->IncrRef();
}

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void hsm_FHpVecMgr::InsertDirWithTest

(

hsm_FileHeader **

a_FileHObj

)

See also:

hsm_FHcache

Definition at line 71 of file hsm_FHcache.cpp.

References dbg_NORM, IVD_PRINT_ID_FS, log_DBG_m, log_FUNC_m, and m_FHpVec_x.

                                                                 {
    log_FUNC_m(InsertDirWithTest);
    cmn_MutexLock l(m_FHpVec_x);

    ivd_GenInode_t inode = (*a_FileHObj)->GetInode();
    for (hsm_FH_p_vi iter = begin(); iter != end(); iter++) {
        if ((*iter)->GetInode() == inode) {  // already inserted 
            // delete 
            log_DBG_m(dbg_NORM, " Dir. " << (*iter)->MakePath() 
                             << " inode " << IVD_PRINT_ID_FS(inode)
                             << " already exist in cache. It's going to delete and replace with FH from cache.");
//          (*a_FileHObj)->DecrRef();   not need. It is going to delete anyhow 
            delete *a_FileHObj;   // forget constructed FH 
            *a_FileHObj = (*iter); // use it that from cache
            // when found inc ref to prevent removal from memory specialy for owners
//BUG269            (*iter)->IncMemberRef(); 
//             (*iter)->IncrRef();  not need inserted FH already has increased reference
            return;
         }
    }    
    // not in cache yet
    insert(end(), *a_FileHObj);
    (*a_FileHObj)->IncrRef();
}

void hsm_FHpVecMgr::Remove

(

register hsm_FileHeader *

a_FileHObj

)

Find proper FH by serching its addres in container if FH has only one reference then is removed from cache othervice not iterator possition is replaced with last FH in vector or just remove Fh if it's last.

if element is directory then has one

Definition at line 101 of file hsm_FHcache.cpp.

References dbg_NORM, hsm_FileHeader::GetInode(), ie_INVALID_ARG, IVD_PRINT_ID_FS, log_DBG_m, log_FUNC_m, and m_FHpVec_x.

                                                              {
    log_FUNC_m(Remove);
    cmn_MutexLock l(m_FHpVec_x);

    hsm_FH_p_vi endel = end();
    for (hsm_FH_p_vi iter = begin(); iter != end(); iter++) {
        if (*iter == a_FileHObj) {  // find iter that point to FH
            log_DBG_m(dbg_NORM, "Removed from cache. INO " << IVD_PRINT_ID_FS(a_FileHObj->GetInode()));
            (*iter)->DecrRef();
            if (iter != --endel) { // endel become last
                *iter = *endel;  // if iter is not last move last to current
            }
            erase(endel);        // othervice remove last
            return; // DONE
        }
    }
    throw ivd_InternalError(ie_INVALID_ARG, 
            "File Header is not found in FHcache by its pointer.", true);
}

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bool hsm_FHpVecMgr::RemoveLastButOne

(

register hsm_FileHeader *

a_FileHObj

)

Definition at line 123 of file hsm_FHcache.cpp.

References dbg_DETAIL, dbg_NORM, hsm_FileHeader::GetInode(), hsm_FileHeader::GetRef(), ie_INVALID_ARG, IVD_PRINT_ID_FS, log_DBG_m, log_FUNC_m, and m_FHpVec_x.

                                                                        {
    log_FUNC_m(RemoveLastButOne);
    cmn_MutexLock l(m_FHpVec_x);

    hsm_FH_p_vi endel = end();
    for (hsm_FH_p_vi iter = begin(); iter != end(); iter++) {
        if (*iter == a_FileHObj) {  // find iter that point to FH
            UInt32_t ref = a_FileHObj->GetRef();
            if (ref == 2) { // cache and caller referencies
                log_DBG_m(dbg_NORM, "Removed from cache. INO " << IVD_PRINT_ID_FS(a_FileHObj->GetInode()));
                (*iter)->DecrRef();
                if (iter != --endel) { // endel become last
                    *iter = *endel;  // if iter is not last move last to current
                }
                erase(endel);        // othervice remove last
                return true;
            }
            else {
                log_DBG_m(dbg_DETAIL, "Don't remove from cache. Ref=" << ref
                        << ". INO " << IVD_PRINT_ID_FS(a_FileHObj->GetInode()));
                return false;
            }
         }
    }
    // 
    ostringstream sstr;
    sstr << "File Header is not found in FHcache by its pointer." << endl
         << *a_FileHObj;
    throw ivd_InternalError(ie_INVALID_ARG, sstr.str(), true);
}

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hsm_FileHeader * hsm_FHpVecMgr::GetFH

(

ivd_GenInode_t

a_generalInode

)

search for file header NOTE if fount then referece will be increased to prevent from delete

Definition at line 155 of file hsm_FHcache.cpp.

References dbg_DETAIL, IVD_PRINT_ID_FS, log_DBG_m, log_FUNC_m, m_FHpVec_x, and NULL.

                                                                   {
    log_FUNC_m(GetFH(ivd_GenInode_t));
    cmn_MutexLock l(m_FHpVec_x);
//    register hsm_FH_p_vi endel = end();
    log_DBG_m(dbg_DETAIL, " Search FH. inode " << IVD_PRINT_ID_FS(a_generalInode));
    for (hsm_FH_p_vi iter = begin(); iter != end(); iter++) {
        if ((*iter)->GetInode() == a_generalInode) {  
            // when found inc ref to prevent removal from memory specialy for owners
//BUG269            (*iter)->IncMemberRef(); 
            (*iter)->IncrRef(); 
            return *iter;
         }
    }    
    return NULL;
}

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Member Data Documentation

cmn_Mutex hsm_FHpVecMgr::m_FHpVec_x [private]

Definition at line 40 of file hsm_FHcache.h.

Referenced by GetFH(), Insert(), InsertDirWithTest(), Remove(), and RemoveLastButOne().

hsm_FHpVecMgr::log_CLASSID_m

Definition at line 43 of file hsm_FHcache.h.

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The documentation for this class was generated from the following files:

• hsm_FHcache.h
• hsm_FHcache.cpp