58   TestvfsBuffer *pShm;            /* Shared memory buffer */  member
618   pFd->pShm = 0;  in tvfsOpen()
836   assert( pFd->pShmId && pFd->pShm==0 && pFd->pNext==0 );  in tvfsShmOpen()
873   pFd->pShm = pBuffer;  in tvfsShmOpen()
902   if( 0==pFd->pShm ){  in tvfsShmMap()
916         Tcl_NewStringObj(pFd->pShm->zFile, -1), pFd->pShmId, pArg, 0  in tvfsShmMap()
925   if( rc==SQLITE_OK && isWrite && !pFd->pShm->aPage[iPage] ){  in tvfsShmMap()
926     tvfsAllocPage(pFd->pShm, iPage, pgsz);  in tvfsShmMap()
929     *pp = (void volatile *)pFd->pShm->aPage[iPage];  in tvfsShmMap()
968         Tcl_NewStringObj(pFd->pShm->zFile, -1), pFd->pShmId,  in tvfsShmLock()
984       for(p2=pFd->pShm->pFile; p2; p2=p2->pNext){  in tvfsShmLock()
1009     const char *z = pFd->pShm ? pFd->pShm->zFile : "";  in tvfsShmBarrier()
1027   TestvfsBuffer *pBuffer = pFd->pShm;  in tvfsShmUnmap()
1036   assert( pFd->pShmId && pFd->pShm );  in tvfsShmUnmap()
1040         Tcl_NewStringObj(pFd->pShm->zFile, -1), pFd->pShmId, 0, 0  in tvfsShmUnmap()
1060   pFd->pShm = 0;  in tvfsShmUnmap()
1644   void volatile *pShm = 0;  in test_vfs_set_readmark()  local
1665   rc = pFd->pMethods->xShmMap(pFd, 0, 32*1024, 0, &pShm);  in test_vfs_set_readmark()
1670   if( pShm==0 ){  in test_vfs_set_readmark()
1674   aShm = (u32*)pShm;  in test_vfs_set_readmark()