tcl_lock.c

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	 * defined above.
	 */
	if (Tcl_GetIndexFromObj(interp,
	    objv[1], lkcmds, "command", TCL_EXACT, &cmdindex) != TCL_OK)
		return (IS_HELP(objv[1]));

	switch ((enum lkcmds)cmdindex) {
	case LKPUT:
		_debug_check();
		ret = env->lock_put(env, lock);
		result = _ReturnSetup(interp, ret, DB_RETOK_STD(ret),
		    "lock put");
		(void)Tcl_DeleteCommand(interp, lkip->i_name);
		_DeleteInfo(lkip);
		__os_free(env, lock);
		break;
	}
	return (result);
}

/*
 * tcl_LockVec --
 *
 * PUBLIC: int tcl_LockVec __P((Tcl_Interp *, int, Tcl_Obj * CONST*, DB_ENV *));
 */
int
tcl_LockVec(interp, objc, objv, envp)
	Tcl_Interp *interp;		/* Interpreter */
	int objc;			/* How many arguments? */
	Tcl_Obj *CONST objv[];		/* The argument objects */
	DB_ENV *envp;			/* environment pointer */
{
	static char *lvopts[] = {
		"-nowait",
		 NULL
	};
	enum lvopts {
		LVNOWAIT
	};
	static char *lkops[] = {
		"get",
		"put",
		"put_all",
		"put_obj",
		"timeout",
		 NULL
	};
	enum lkops {
		LKGET,
		LKPUT,
		LKPUTALL,
		LKPUTOBJ,
		LKTIMEOUT
	};
	DB_LOCK *lock;
	DB_LOCKREQ list;
	DBT obj;
	Tcl_Obj **myobjv, *res, *thisop;
	void *otmp;
	u_int32_t flag, lockid;
	int freeobj, i, myobjc, optindex, result, ret;
	char *lockname, msg[MSG_SIZE], newname[MSG_SIZE];

	result = TCL_OK;
	memset(newname, 0, MSG_SIZE);
	flag = 0;
	freeobj = 0;

	/*
	 * If -nowait is given, it MUST be first arg.
	 */
	if (Tcl_GetIndexFromObj(interp, objv[2],
	    lvopts, "option", TCL_EXACT, &optindex) == TCL_OK) {
		switch ((enum lvopts)optindex) {
		case LVNOWAIT:
			flag |= DB_LOCK_NOWAIT;
			break;
		}
		i = 3;
	} else {
		if (IS_HELP(objv[2]) == TCL_OK)
			return (TCL_OK);
		Tcl_ResetResult(interp);
		i = 2;
	}

	/*
	 * Our next arg MUST be the locker ID.
	 */
	result = _GetUInt32(interp, objv[i++], &lockid);
	if (result != TCL_OK)
		return (result);

	/*
	 * All other remaining args are operation tuples.
	 * Go through sequentially to decode, execute and build
	 * up list of return values.
	 */
	res = Tcl_NewListObj(0, NULL);
	while (i < objc) {
		/*
		 * Get the list of the tuple.
		 */
		lock = NULL;
		result = Tcl_ListObjGetElements(interp, objv[i],
		    &myobjc, &myobjv);
		if (result == TCL_OK)
			i++;
		else
			break;
		/*
		 * First we will set up the list of requests.
		 * We will make a "second pass" after we get back
		 * the results from the lock_vec call to create
		 * the return list.
		 */
		if (Tcl_GetIndexFromObj(interp, myobjv[0],
		    lkops, "option", TCL_EXACT, &optindex) != TCL_OK) {
			result = IS_HELP(myobjv[0]);
			goto error;
		}
		switch ((enum lkops)optindex) {
		case LKGET:
			if (myobjc != 3) {
				Tcl_WrongNumArgs(interp, 1, myobjv,
				    "{get obj mode}");
				result = TCL_ERROR;
				goto error;
			}
			result = _LockMode(interp, myobjv[2], &list.mode);
			if (result != TCL_OK)
				goto error;
			ret = _CopyObjBytes(interp, myobjv[1], &otmp,
			    &obj.size, &freeobj);
			if (ret != 0) {
				result = _ReturnSetup(interp, ret,
				    DB_RETOK_STD(ret), "lock vec");
				return (result);
			}
			obj.data = otmp;
			ret = _GetThisLock(interp, envp, lockid, flag,
			    &obj, list.mode, newname);
			if (ret != 0) {
				result = _ReturnSetup(interp, ret,
				    DB_RETOK_STD(ret), "lock vec");
				thisop = Tcl_NewIntObj(ret);
				(void)Tcl_ListObjAppendElement(interp, res,
				    thisop);
				goto error;
			}
			thisop = Tcl_NewStringObj(newname, strlen(newname));
			(void)Tcl_ListObjAppendElement(interp, res, thisop);
			if (freeobj) {
				(void)__os_free(envp, otmp);
				freeobj = 0;
			}
			continue;
		case LKPUT:
			if (myobjc != 2) {
				Tcl_WrongNumArgs(interp, 1, myobjv,
				    "{put lock}");
				result = TCL_ERROR;
				goto error;
			}
			list.op = DB_LOCK_PUT;
			lockname = Tcl_GetStringFromObj(myobjv[1], NULL);
			lock = NAME_TO_LOCK(lockname);
			if (lock == NULL) {
				snprintf(msg, MSG_SIZE, "Invalid lock: %s\n",
				    lockname);
				Tcl_SetResult(interp, msg, TCL_VOLATILE);
				result = TCL_ERROR;
				goto error;
			}
			list.lock = *lock;
			break;
		case LKPUTALL:
			if (myobjc != 1) {
				Tcl_WrongNumArgs(interp, 1, myobjv,
				    "{put_all}");
				result = TCL_ERROR;
				goto error;
			}
			list.op = DB_LOCK_PUT_ALL;
			break;
		case LKPUTOBJ:
			if (myobjc != 2) {
				Tcl_WrongNumArgs(interp, 1, myobjv,
				    "{put_obj obj}");
				result = TCL_ERROR;
				goto error;
			}
			list.op = DB_LOCK_PUT_OBJ;
			ret = _CopyObjBytes(interp, myobjv[1], &otmp,
			    &obj.size, &freeobj);
			if (ret != 0) {
				result = _ReturnSetup(interp, ret,
				    DB_RETOK_STD(ret), "lock vec");
				return (result);
			}
			obj.data = otmp;
			list.obj = &obj;
			break;
		case LKTIMEOUT:
			list.op = DB_LOCK_TIMEOUT;
			break;

		}
		/*
		 * We get here, we have set up our request, now call
		 * lock_vec.
		 */
		_debug_check();
		ret = envp->lock_vec(envp, lockid, flag, &list, 1, NULL);
		/*
		 * Now deal with whether or not the operation succeeded.
		 * Get's were done above, all these are only puts.
		 */
		thisop = Tcl_NewIntObj(ret);
		result = Tcl_ListObjAppendElement(interp, res, thisop);
		if (ret != 0 && result == TCL_OK)
			result = _ReturnSetup(interp, ret,
			    DB_RETOK_STD(ret), "lock put");
		if (freeobj) {
			(void)__os_free(envp, otmp);
			freeobj = 0;
		}
		/*
		 * We did a put of some kind.  Since we did that,
		 * we have to delete the commands associated with
		 * any of the locks we just put.
		 */
		_LockPutInfo(interp, list.op, lock, lockid, &obj);
	}

	if (result == TCL_OK && res)
		Tcl_SetObjResult(interp, res);
error:
	return (result);
}

static int
_LockMode(interp, obj, mode)
	Tcl_Interp *interp;
	Tcl_Obj *obj;
	db_lockmode_t *mode;
{
	int optindex;

	if (Tcl_GetIndexFromObj(interp, obj, lkmode, "option",
	    TCL_EXACT, &optindex) != TCL_OK)
		return (IS_HELP(obj));
	switch ((enum lkmode)optindex) {
	case LK_NG:
		*mode = DB_LOCK_NG;
		break;
	case LK_READ:
		*mode = DB_LOCK_READ;
		break;
	case LK_WRITE:
		*mode = DB_LOCK_WRITE;
		break;
	case LK_IREAD:
		*mode = DB_LOCK_IREAD;
		break;
	case LK_IWRITE:
		*mode = DB_LOCK_IWRITE;
		break;
	case LK_IWR:
		*mode = DB_LOCK_IWR;
		break;
	}
	return (TCL_OK);
}

static void
_LockPutInfo(interp, op, lock, lockid, objp)
	Tcl_Interp *interp;
	db_lockop_t op;
	DB_LOCK *lock;
	u_int32_t lockid;
	DBT *objp;
{
	DBTCL_INFO *p, *nextp;
	int found;

	for (p = LIST_FIRST(&__db_infohead); p != NULL; p = nextp) {
		found = 0;
		nextp = LIST_NEXT(p, entries);
		if ((op == DB_LOCK_PUT && (p->i_lock == lock)) ||
		    (op == DB_LOCK_PUT_ALL && p->i_locker == lockid) ||
		    (op == DB_LOCK_PUT_OBJ && p->i_lockobj.data &&
			memcmp(p->i_lockobj.data, objp->data, objp->size) == 0))
			found = 1;
		if (found) {
			(void)Tcl_DeleteCommand(interp, p->i_name);
			__os_free(NULL, p->i_lock);
			_DeleteInfo(p);
		}
	}
}

static int
_GetThisLock(interp, envp, lockid, flag, objp, mode, newname)
	Tcl_Interp *interp;		/* Interpreter */
	DB_ENV *envp;			/* Env handle */
	u_int32_t lockid;		/* Locker ID */
	u_int32_t flag;			/* Lock flag */
	DBT *objp;			/* Object to lock */
	db_lockmode_t mode;		/* Lock mode */
	char *newname;			/* New command name */
{
	DB_LOCK *lock;
	DBTCL_INFO *envip, *ip;
	int result, ret;

	result = TCL_OK;
	envip = _PtrToInfo((void *)envp);
	if (envip == NULL) {
		Tcl_SetResult(interp, "Could not find env info\n", TCL_STATIC);
		return (TCL_ERROR);
	}
	snprintf(newname, MSG_SIZE, "%s.lock%d",
	    envip->i_name, envip->i_envlockid);
	ip = _NewInfo(interp, NULL, newname, I_LOCK);
	if (ip == NULL) {
		Tcl_SetResult(interp, "Could not set up info",
		    TCL_STATIC);
		return (TCL_ERROR);
	}
	ret = __os_malloc(envp, sizeof(DB_LOCK), &lock);
	if (ret != 0) {
		Tcl_SetResult(interp, db_strerror(ret), TCL_STATIC);
		return (TCL_ERROR);
	}
	_debug_check();
	ret = envp->lock_get(envp, lockid, flag, objp, mode, lock);
	result = _ReturnSetup(interp, ret, DB_RETOK_STD(ret), "lock get");
	if (result == TCL_ERROR) {
		__os_free(envp, lock);
		_DeleteInfo(ip);
		return (result);
	}
	/*
	 * Success.  Set up return.  Set up new info
	 * and command widget for this lock.
	 */
	ret = __os_malloc(envp, objp->size, &ip->i_lockobj.data);
	if (ret != 0) {
		Tcl_SetResult(interp, "Could not duplicate obj",
		    TCL_STATIC);
		(void)envp->lock_put(envp, lock);
		__os_free(envp, lock);
		_DeleteInfo(ip);
		result = TCL_ERROR;
		goto error;
	}
	memcpy(ip->i_lockobj.data, objp->data, objp->size);
	ip->i_lockobj.size = objp->size;
	envip->i_envlockid++;
	ip->i_parent = envip;
	ip->i_locker = lockid;
	_SetInfoData(ip, lock);
	Tcl_CreateObjCommand(interp, newname,
	    (Tcl_ObjCmdProc *)lock_Cmd, (ClientData)lock, NULL);
error:
	return (result);
}
#endif