tcl_txn.c

这是linux下运行的mysql软件包,可用于linux 下安装 php + mysql + apach 的网络配置

	MAKE_STAT_LSN("LSN of last checkpoint", &sp->st_last_ckp);
	MAKE_STAT_LIST("Time of last checkpoint", sp->st_time_ckp);
	MAKE_STAT_LIST("Last txn ID allocated", sp->st_last_txnid);
	MAKE_STAT_LIST("Max Txns", sp->st_maxtxns);
	MAKE_STAT_LIST("Number aborted txns", sp->st_naborts);
	MAKE_STAT_LIST("Number active txns", sp->st_nactive);
	MAKE_STAT_LIST("Maximum  active txns", sp->st_maxnactive);
	MAKE_STAT_LIST("Number txns begun", sp->st_nbegins);
	MAKE_STAT_LIST("Number committed txns", sp->st_ncommits);
	MAKE_STAT_LIST("Number restored txns", sp->st_nrestores);
	MAKE_STAT_LIST("Number of region lock waits", sp->st_region_wait);
	MAKE_STAT_LIST("Number of region lock nowaits", sp->st_region_nowait);
	for (i = 0, p = sp->st_txnarray; i < sp->st_nactive; i++, p++)
		for (ip = LIST_FIRST(&__db_infohead); ip != NULL;
		    ip = LIST_NEXT(ip, entries)) {
			if (ip->i_type != I_TXN)
				continue;
			if (ip->i_type == I_TXN &&
			    (ip->i_txnp->id(ip->i_txnp) == p->txnid)) {
				MAKE_STAT_LSN(ip->i_name, &p->lsn);
				if (p->parentid != 0)
					MAKE_STAT_STRLIST("Parent",
					    ip->i_parent->i_name);
				else
					MAKE_STAT_LIST("Parent", 0);
				break;
			}
		}
	Tcl_SetObjResult(interp, res);
error:
	free(sp);
	return (result);
}

/*
 * tcl_TxnTimeout --
 *
 * PUBLIC: int tcl_TxnTimeout __P((Tcl_Interp *, int,
 * PUBLIC:    Tcl_Obj * CONST*, DB_ENV *));
 */
int
tcl_TxnTimeout(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 */
{
	long timeout;
	int result, ret;

	/*
	 * One arg, the timeout.
	 */
	if (objc != 3) {
		Tcl_WrongNumArgs(interp, 2, objv, "?timeout?");
		return (TCL_ERROR);
	}
	result = Tcl_GetLongFromObj(interp, objv[2], &timeout);
	if (result != TCL_OK)
		return (result);
	_debug_check();
	ret = envp->set_timeout(envp, (u_int32_t)timeout, DB_SET_TXN_TIMEOUT);
	result = _ReturnSetup(interp, ret, DB_RETOK_STD(ret),
	    "lock timeout");
	return (result);
}

/*
 * txn_Cmd --
 *	Implements the "txn" widget.
 */
static int
txn_Cmd(clientData, interp, objc, objv)
	ClientData clientData;		/* Txn handle */
	Tcl_Interp *interp;		/* Interpreter */
	int objc;			/* How many arguments? */
	Tcl_Obj *CONST objv[];		/* The argument objects */
{
	static char *txncmds[] = {
#if CONFIG_TEST
		"discard",
		"id",
		"prepare",
#endif
		"abort",
		"commit",
		NULL
	};
	enum txncmds {
#if CONFIG_TEST
		TXNDISCARD,
		TXNID,
		TXNPREPARE,
#endif
		TXNABORT,
		TXNCOMMIT
	};
	DBTCL_INFO *txnip;
	DB_TXN *txnp;
	Tcl_Obj *res;
	int cmdindex, result, ret;
	u_int8_t *gid;

	Tcl_ResetResult(interp);
	txnp = (DB_TXN *)clientData;
	txnip = _PtrToInfo((void *)txnp);
	result = TCL_OK;
	if (txnp == NULL) {
		Tcl_SetResult(interp, "NULL txn pointer", TCL_STATIC);
		return (TCL_ERROR);
	}
	if (txnip == NULL) {
		Tcl_SetResult(interp, "NULL txn info pointer", TCL_STATIC);
		return (TCL_ERROR);
	}

	/*
	 * Get the command name index from the object based on the dbcmds
	 * defined above.
	 */
	if (Tcl_GetIndexFromObj(interp,
	    objv[1], txncmds, "command", TCL_EXACT, &cmdindex) != TCL_OK)
		return (IS_HELP(objv[1]));

	res = NULL;
	switch ((enum txncmds)cmdindex) {
#if CONFIG_TEST
	case TXNDISCARD:
		if (objc != 2) {
			Tcl_WrongNumArgs(interp, 1, objv, NULL);
			return (TCL_ERROR);
		}
		_debug_check();
		ret = txnp->discard(txnp, 0);
		result = _ReturnSetup(interp, ret, DB_RETOK_STD(ret),
		    "txn discard");
		_TxnInfoDelete(interp, txnip);
		(void)Tcl_DeleteCommand(interp, txnip->i_name);
		_DeleteInfo(txnip);
		break;
	case TXNID:
		if (objc != 2) {
			Tcl_WrongNumArgs(interp, 1, objv, NULL);
			return (TCL_ERROR);
		}
		_debug_check();
		ret = txnp->id(txnp);
		res = Tcl_NewIntObj(ret);
		break;
	case TXNPREPARE:
		if (objc != 3) {
			Tcl_WrongNumArgs(interp, 1, objv, NULL);
			return (TCL_ERROR);
		}
		_debug_check();
		gid = (u_int8_t *)Tcl_GetByteArrayFromObj(objv[2], NULL);
		ret = txnp->prepare(txnp, gid);
		/*
		 * !!!
		 * DB_TXN->prepare commits all outstanding children.  But it
		 * does NOT destroy the current txn handle.  So, we must call
		 * _TxnInfoDelete to recursively remove all nested txn handles,
		 * we do not call _DeleteInfo on ourselves.
		 */
		_TxnInfoDelete(interp, txnip);
		result = _ReturnSetup(interp, ret, DB_RETOK_STD(ret),
		    "txn prepare");
		break;
#endif
	case TXNABORT:
		if (objc != 2) {
			Tcl_WrongNumArgs(interp, 1, objv, NULL);
			return (TCL_ERROR);
		}
		_debug_check();
		ret = txnp->abort(txnp);
		result = _ReturnSetup(interp, ret, DB_RETOK_STD(ret),
		    "txn abort");
		_TxnInfoDelete(interp, txnip);
		(void)Tcl_DeleteCommand(interp, txnip->i_name);
		_DeleteInfo(txnip);
		break;
	case TXNCOMMIT:
		result = tcl_TxnCommit(interp, objc, objv, txnp, txnip);
		_TxnInfoDelete(interp, txnip);
		(void)Tcl_DeleteCommand(interp, txnip->i_name);
		_DeleteInfo(txnip);
		break;
	}
	/*
	 * Only set result if we have a res.  Otherwise, lower
	 * functions have already done so.
	 */
	if (result == TCL_OK && res)
		Tcl_SetObjResult(interp, res);
	return (result);
}

static int
tcl_TxnCommit(interp, objc, objv, txnp, txnip)
	Tcl_Interp *interp;		/* Interpreter */
	int objc;			/* How many arguments? */
	Tcl_Obj *CONST objv[];		/* The argument objects */
	DB_TXN *txnp;			/* Transaction pointer */
	DBTCL_INFO *txnip;		/* Info pointer */
{
	static char *commitopt[] = {
		"-nosync",
		"-sync",
		NULL
	};
	enum commitopt {
		COMSYNC,
		COMNOSYNC
	};
	u_int32_t flag;
	int optindex, result, ret;

	COMPQUIET(txnip, NULL);

	result = TCL_OK;
	flag = 0;
	if (objc != 2 && objc != 3) {
		Tcl_WrongNumArgs(interp, 1, objv, NULL);
		return (TCL_ERROR);
	}
	if (objc == 3) {
		if (Tcl_GetIndexFromObj(interp, objv[2], commitopt,
		    "option", TCL_EXACT, &optindex) != TCL_OK)
			return (IS_HELP(objv[2]));
		switch ((enum commitopt)optindex) {
		case COMSYNC:
			FLAG_CHECK(flag);
			flag = DB_TXN_SYNC;
			break;
		case COMNOSYNC:
			FLAG_CHECK(flag);
			flag = DB_TXN_NOSYNC;
			break;
		}
	}

	_debug_check();
	ret = txnp->commit(txnp, flag);
	result = _ReturnSetup(interp, ret, DB_RETOK_STD(ret),
	    "txn commit");
	return (result);
}

#if CONFIG_TEST
/*
 * tcl_TxnRecover --
 *
 * PUBLIC: int tcl_TxnRecover __P((Tcl_Interp *, int,
 * PUBLIC:    Tcl_Obj * CONST*, DB_ENV *, DBTCL_INFO *));
 */
int
tcl_TxnRecover(interp, objc, objv, envp, envip)
	Tcl_Interp *interp;		/* Interpreter */
	int objc;			/* How many arguments? */
	Tcl_Obj *CONST objv[];		/* The argument objects */
	DB_ENV *envp;			/* Environment pointer */
	DBTCL_INFO *envip;		/* Info pointer */
{
#define	DO_PREPLIST(count)						\
for (i = 0; i < count; i++) {						\
	snprintf(newname, sizeof(newname), "%s.txn%d",			\
	    envip->i_name, envip->i_envtxnid);				\
	ip = _NewInfo(interp, NULL, newname, I_TXN);			\
	if (ip == NULL) {						\
		Tcl_SetResult(interp, "Could not set up info",		\
		    TCL_STATIC);					\
		return (TCL_ERROR);					\
	}								\
	envip->i_envtxnid++;						\
	ip->i_parent = envip;						\
	p = &prep[i];							\
	_SetInfoData(ip, p->txn);					\
	Tcl_CreateObjCommand(interp, newname,				\
	    (Tcl_ObjCmdProc *)txn_Cmd, (ClientData)p->txn, NULL);	\
	result = _SetListElem(interp, res, newname, strlen(newname),	\
	    p->gid, DB_XIDDATASIZE);					\
	if (result != TCL_OK)						\
		goto error;						\
}

	DBTCL_INFO *ip;
	DB_PREPLIST prep[DBTCL_PREP], *p;
	Tcl_Obj *res;
	long count, i;
	int result, ret;
	char newname[MSG_SIZE];

	result = TCL_OK;
	/*
	 * No args for this.  Error if there are some.
	 */
	if (objc != 2) {
		Tcl_WrongNumArgs(interp, 2, objv, NULL);
		return (TCL_ERROR);
	}
	_debug_check();
	ret = envp->txn_recover(envp, prep, DBTCL_PREP, &count, DB_FIRST);
	result = _ReturnSetup(interp, ret, DB_RETOK_STD(ret),
	    "txn recover");
	if (result == TCL_ERROR)
		return (result);
	res = Tcl_NewObj();
	DO_PREPLIST(count);

	/*
	 * If count returned is the maximum size we have, then there
	 * might be more.  Keep going until we get them all.
	 */
	while (count == DBTCL_PREP) {
		ret = envp->txn_recover(
		    envp, prep, DBTCL_PREP, &count, DB_NEXT);
		result = _ReturnSetup(interp, ret, DB_RETOK_STD(ret),
		    "txn recover");
		if (result == TCL_ERROR)
			return (result);
		DO_PREPLIST(count);
	}
	Tcl_SetObjResult(interp, res);
error:
	return (result);
}
#endif