static int cfShmMap( sqlite3_file *pFile, /* Handle open on database file */ int iRegion, /* Region to retrieve */ int sz, /* Size of regions */ int w, /* True to extend file if necessary */ void volatile **pp /* OUT: Mapped memory */ ){ return sqlite3OsShmMap(((CrashFile*)pFile)->pRealFile, iRegion, sz, w, pp); }
static int devsymShmMap( sqlite3_file *pFile, int iRegion, int szRegion, int isWrite, void volatile **pp ){ devsym_file *p = (devsym_file *)pFile; return sqlite3OsShmMap(p->pReal, iRegion, szRegion, isWrite, pp); }
static int tvfsShmMap( sqlite3_file *pFile, /* Handle open on database file */ int iPage, /* Page to retrieve */ int pgsz, /* Size of pages */ int isWrite, /* True to extend file if necessary */ void volatile **pp /* OUT: Mapped memory */ ){ int rc = SQLITE_OK; TestvfsFd *pFd = tvfsGetFd(pFile); Testvfs *p = (Testvfs *)(pFd->pVfs->pAppData); if( p->isFullshm ){ return sqlite3OsShmMap(pFd->pReal, iPage, pgsz, isWrite, pp); } if( 0==pFd->pShm ){ rc = tvfsShmOpen(pFile); if( rc!=SQLITE_OK ){ return rc; } } if( p->pScript && p->mask&TESTVFS_SHMMAP_MASK ){ Tcl_Obj *pArg = Tcl_NewObj(); Tcl_IncrRefCount(pArg); Tcl_ListObjAppendElement(p->interp, pArg, Tcl_NewIntObj(iPage)); Tcl_ListObjAppendElement(p->interp, pArg, Tcl_NewIntObj(pgsz)); Tcl_ListObjAppendElement(p->interp, pArg, Tcl_NewIntObj(isWrite)); tvfsExecTcl(p, "xShmMap", Tcl_NewStringObj(pFd->pShm->zFile, -1), pFd->pShmId, pArg, 0 ); tvfsResultCode(p, &rc); Tcl_DecrRefCount(pArg); } if( rc==SQLITE_OK && p->mask&TESTVFS_SHMMAP_MASK && tvfsInjectIoerr(p) ){ rc = SQLITE_IOERR; } if( rc==SQLITE_OK && isWrite && !pFd->pShm->aPage[iPage] ){ tvfsAllocPage(pFd->pShm, iPage, pgsz); } *pp = (void volatile *)pFd->pShm->aPage[iPage]; return rc; }