Interface nsIAsyncFileMetadataType

Hierarchy

Properties

lastModified size

Methods

AddRef QueryInterface Release asyncFileMetadataWait getFileDescriptor

Properties

Readonly lastModified

lastModified: number

File last modified time in milliseconds from midnight (00:00:00), January 1, 1970 Greenwich Mean Time (GMT).

Readonly size

size: number

File size in bytes.

Methods

AddRef

  • Increases the reference count for this interface. The associated instance will not be deleted unless the reference count is returned to zero.

    Returns

    The resulting reference count.

    Returns number

QueryInterface

  • Parameters

    • aIID: object
    • Optional aInstancePtr: object

    Returns any

  • A run time mechanism for interface discovery.

    Returns

    NS_OK if the interface is supported by the associated instance, NS_NOINTERFACE if it is not.

    aInstancePtr must not be null.

    Parameters

    • aIID: object

      [in] A requested interface IID

    • aInstancePtr: object

      [out] A pointer to an interface pointer to receive the result.

    Returns void

Release

  • Decreases the reference count for this interface. Generally, if the reference count returns to zero, the associated instance is deleted.

    Returns

    The resulting reference count.

    Returns number

asyncFileMetadataWait

  • Asynchronously wait for the object to be ready.

    Parameters

    • aCallback: nsIFileMetadataCallback

      The callback will be used when the stream is ready to return File metadata. Use a nullptr to cancel a previous operation.

    • aEventTarget: nsIEventTarget

      The event target where aCallback will be executed. If aCallback is passed, aEventTarget cannot be null.

    Returns void

getFileDescriptor

  • The internal file descriptor. It can be used for memory mapping of the underlying file. Please use carefully! If this returns NS_BASE_STREAM_WOULD_BLOCK, consider the use of nsIAsyncFileMetadata.

    Returns PRFileDescPtr

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