Struct xpcom::interfaces::mozIStorageAsyncConnection

#[repr(C)]
pub struct mozIStorageAsyncConnection { /* fields omitted */ }

interface mozIStorageAsyncConnection : nsISupports

/**
 * mozIStorageAsyncConnection represents an asynchronous database
 * connection attached to a specific file or to an in-memory data
 * storage.  It is the primary interface for interacting with a
 * database from the main thread, including creating prepared
 * statements, executing SQL, and examining database errors.
 */

Methods

impl mozIStorageAsyncConnection

pub fn coerce<T: mozIStorageAsyncConnectionCoerce>(&self) -> &T

Cast this mozIStorageAsyncConnection to one of its base interfaces.

impl mozIStorageAsyncConnection

pub unsafe fn AsyncClose(
    &self,
    aCallback: *const mozIStorageCompletionCallback
) -> nsresult

/**
   * Close this database connection, allowing all pending statements
   * to complete first.
   *
   * @param aCallback [optional]
   *        A callback that will be notified when the close is completed,
   *        with the following arguments:
   *        - status: the status of the call
   *        - value: |null|
   *
   * @throws NS_ERROR_NOT_SAME_THREAD
   *         If called on a thread other than the one that opened it.  The
   *         callback will not be dispatched.
   * @throws NS_ERROR_NOT_INITIALIZED
   *         If called on a connection that has already been closed or was
   *         never properly opened.  The callback will still be dispatched
   *         to the main thread despite the returned error.
   * @note If this call should fail, the callback won't be invoked.
   */

void asyncClose ([optional] in mozIStorageCompletionCallback aCallback);

pub unsafe fn SpinningSynchronousClose(&self) -> nsresult

/**
   * Forcibly closes a database connection synchronously.
   * This should only be used when it's required to close and replace the
   * database synchronously to return control to the consumer, for example in
   * case of a detected corruption on database opening.
   * Since this spins the events loop, it should be used only in very particular
   * and rare situations, or it may cause unexpected consequences (crashes).
   *
   * @throws NS_ERROR_NOT_SAME_THREAD
   *         If called on a thread other than the one that opened it.
   */

[noscript] void spinningSynchronousClose ();

pub unsafe fn AsyncClone(
    &self,
    aReadOnly: bool,
    aCallback: *const mozIStorageCompletionCallback
) -> nsresult

/**
   * Clone a database and make the clone read only if needed.
   * SQL Functions and attached on-disk databases are applied to the new clone.
   *
   * @param aReadOnly
   *        If true, the returned database should be put into read-only mode.
   *
   * @param aCallback
   *        A callback that will be notified when the operation is complete,
   *        with the following arguments:
   *        - status: the status of the operation
   *        - value: in case of success, an intance of
   *             mozIStorageAsyncConnection cloned from this one.
   *
   * @throws NS_ERROR_NOT_SAME_THREAD
   *         If is called on a thread other than the one that opened it.
   * @throws NS_ERROR_UNEXPECTED
   *         If this connection is a memory database.
   *
   * @note If your connection is already read-only, you will get a read-only
   *       clone.
   * @note The resulting connection will NOT implement mozIStorageConnection,
   *       it will only implement mozIStorageAsyncConnection.
   * @note Due to a bug in SQLite, if you use the shared cache
   *       (see mozIStorageService), you end up with the same privileges as the
   *       first connection opened regardless of what is specified in aReadOnly.
   * @note The following pragmas are copied over to a read-only clone:
   *        - cache_size
   *        - temp_store
   *       The following pragmas are copied over to a writeable clone:
   *        - cache_size
   *        - temp_store
   *        - foreign_keys
   *        - journal_size_limit
   *        - synchronous
   *        - wal_autocheckpoint
   *       All SQL functions are copied over to read-only and writeable clones.
   *       Additionally, all temporary tables, triggers, and views, as well as
   *       any indexes on temporary tables, are copied over to writeable clones.
   *       For temporary tables, only the schemas are copied, not their
   *       contents.
   */

void asyncClone (in boolean aReadOnly, in mozIStorageCompletionCallback aCallback);

pub unsafe fn GetDatabaseFile(
    &self,
    aDatabaseFile: *mut *const nsIFile
) -> nsresult

/**
   * The current database nsIFile.  Null if the database
   * connection refers to an in-memory database.
   */

readonly attribute nsIFile databaseFile;

pub unsafe fn Interrupt(&self) -> nsresult

/**
   * Causes any pending database operation to abort and return at the first
   * opportunity.
   * This can only be used on read-only connections that don't implement
   * the mozIStorageConnection interface.
   * @note operations that are nearly complete may still be able to complete.
   * @throws if used on an unsupported connection type, or a closed connection.
   */

void interrupt ();

pub unsafe fn CreateAsyncStatement(
    &self,
    aSQLStatement: &nsACString,
    _retval: *mut *const mozIStorageAsyncStatement
) -> nsresult

/**
   * Create an asynchronous statement for the given SQL. An
   * asynchronous statement can only be used to dispatch asynchronous
   * requests to the asynchronous execution thread and cannot be used
   * to take any synchronous actions on the database.
   *
   * The expression may use ? to indicate sequential numbered arguments,
   * ?1, ?2 etc. to indicate specific numbered arguments or :name and
   * $var to indicate named arguments.
   *
   * @param aSQLStatement
   *        The SQL statement to execute.
   * @return a new mozIStorageAsyncStatement
   * @note The statement is created lazily on first execution.
   */

mozIStorageAsyncStatement createAsyncStatement (in AUTF8String aSQLStatement);

pub unsafe fn ExecuteAsync(
    &self,
    aStatements: *mut *const mozIStorageBaseStatement,
    aNumStatements: uint32_t,
    aCallback: *const mozIStorageStatementCallback,
    _retval: *mut *const mozIStoragePendingStatement
) -> nsresult

/**
   * Execute an array of statements created with this connection using
   * any currently bound parameters. When the array contains multiple
   * statements, the execution is wrapped in a single
   * transaction. These statements can be reused immediately, and
   * reset does not need to be called.
   *
   * @param aStatements
   *        The array of statements to execute asynchronously, in the order they
   *        are given in the array.
   * @param aNumStatements
   *        The number of statements in aStatements.
   * @param aCallback [optional]
   *        The callback object that will be notified of progress, errors, and
   *        completion.
   * @return an object that can be used to cancel the statements execution.
   *
   * @note If you have any custom defined functions, they must be
   *        re-entrant since they can be called on multiple threads.
   */

mozIStoragePendingStatement executeAsync ([array, size_is (aNumStatements)] in mozIStorageBaseStatement aStatements, in unsigned long aNumStatements, [optional] in mozIStorageStatementCallback aCallback);

pub unsafe fn ExecuteSimpleSQLAsync(
    &self,
    aSQLStatement: &nsACString,
    aCallback: *const mozIStorageStatementCallback,
    _retval: *mut *const mozIStoragePendingStatement
) -> nsresult

/**
   * Execute asynchronously an SQL expression, expecting no arguments.
   *
   * @param aSQLStatement
   *        The SQL statement to execute
   * @param aCallback [optional]
   *        The callback object that will be notified of progress, errors, and
   *        completion.
   * @return an object that can be used to cancel the statement execution.
   */

mozIStoragePendingStatement executeSimpleSQLAsync (in AUTF8String aSQLStatement, [optional] in mozIStorageStatementCallback aCallback);

pub unsafe fn CreateFunction(
    &self,
    aFunctionName: &nsACString,
    aNumArguments: int32_t,
    aFunction: *const mozIStorageFunction
) -> nsresult

/**
   * Create a new SQL function.  If you use your connection on multiple threads,
   * your function needs to be threadsafe, or it should only be called on one
   * thread.
   *
   * @param aFunctionName
   *        The name of function to create, as seen in SQL.
   * @param aNumArguments
   *        The number of arguments the function takes. Pass -1 for
   *        variable-argument functions.
   * @param aFunction
   *        The instance of mozIStorageFunction, which implements the function
   *        in question.
   */

void createFunction (in AUTF8String aFunctionName, in long aNumArguments, in mozIStorageFunction aFunction);

pub unsafe fn CreateAggregateFunction(
    &self,
    aFunctionName: &nsACString,
    aNumArguments: int32_t,
    aFunction: *const mozIStorageAggregateFunction
) -> nsresult

/**
   * Create a new SQL aggregate function.  If you use your connection on
   * multiple threads, your function needs to be threadsafe, or it should only
   * be called on one thread.
   *
   * @param aFunctionName
   *        The name of aggregate function to create, as seen in SQL.
   * @param aNumArguments
   *        The number of arguments the function takes. Pass -1 for
   *        variable-argument functions.
   * @param aFunction
   *        The instance of mozIStorageAggreagteFunction, which implements the
   *        function in question.
   */

void createAggregateFunction (in AUTF8String aFunctionName, in long aNumArguments, in mozIStorageAggregateFunction aFunction);

pub unsafe fn RemoveFunction(&self, aFunctionName: &nsACString) -> nsresult

/**
   * Delete custom SQL function (simple or aggregate one).
   *
   * @param aFunctionName
   *        The name of function to remove.
   */

void removeFunction (in AUTF8String aFunctionName);

pub unsafe fn SetProgressHandler(
    &self,
    aGranularity: int32_t,
    aHandler: *const mozIStorageProgressHandler,
    _retval: *mut *const mozIStorageProgressHandler
) -> nsresult

/**
   * Sets a progress handler. Only one handler can be registered at a time.
   * If you need more than one, you need to chain them yourself.  This progress
   * handler should be threadsafe if you use this connection object on more than
   * one thread.
   *
   * @param aGranularity
   *        The number of SQL virtual machine steps between progress handler
   *        callbacks.
   * @param aHandler
   *        The instance of mozIStorageProgressHandler.
   * @return previous registered handler.
   */

mozIStorageProgressHandler setProgressHandler (in int32_t aGranularity, in mozIStorageProgressHandler aHandler);

pub unsafe fn RemoveProgressHandler(
    &self,
    _retval: *mut *const mozIStorageProgressHandler
) -> nsresult

/**
   * Remove a progress handler.
   *
   * @return previous registered handler.
   */

mozIStorageProgressHandler removeProgressHandler ();

Methods from Deref<Target = nsISupports>

pub fn coerce<T: nsISupportsCoerce>(&self) -> &T

Cast this nsISupports to one of its base interfaces.

pub unsafe fn QueryInterface(
    &self,
    uuid: &nsIID,
    result: *mut *mut c_void
) -> nsresult

void QueryInterface (in nsIIDRef uuid, [iid_is (uuid), retval] out nsQIResult result);

pub unsafe fn AddRef(&self) -> nsrefcnt

[noscript,notxpcom] nsrefcnt AddRef ();

pub unsafe fn Release(&self) -> nsrefcnt

[noscript,notxpcom] nsrefcnt Release ();

Trait Implementations

impl XpCom for mozIStorageAsyncConnection

const IID: nsIID

IID: nsIID = nsID(2348627157, 19935, 20043, [137, 221, 155, 20, 243, 53, 52, 198])

fn query_interface<T: XpCom>(&self) -> Option<RefPtr<T>>

Perform a QueryInterface call on this object, attempting to dynamically cast it to the requested interface type. Returns Some(RefPtr) if the cast succeeded, and None otherwise.

impl RefCounted for mozIStorageAsyncConnection

unsafe fn addref(&self)

Increment the reference count.

unsafe fn release(&self)

Decrement the reference count, potentially freeing backing memory.

impl Deref for mozIStorageAsyncConnection

type Target = nsISupports

The resulting type after dereferencing.

fn deref(&self) -> &nsISupports

Dereferences the value.