writev_async
Description:
public virtual async bool writev_async (OutputVector[] vectors, int io_priority = DEFAULT, Cancellable? cancellable = null, out size_t bytes_written) throws Error
Request an asynchronous write of the bytes contained in vectors.length vectors into the stream.
When the operation is finished callback will be called. You can then call writev_async.end to
get the result of the operation.
During an async request no other sync and async calls are allowed, and will result in g_io_error_pending errors.
On success, the number of bytes written will be passed to the callback. It is not an error if this is not the same as the
requested size, as it can happen e.g. on a partial I/O error, but generally we try to write as many bytes as requested.
You are guaranteed that this method will never fail with g_io_error_would_block — if this can't accept more data, the method will just wait until this changes.
Any outstanding I/O request with higher priority (lower numerical value) will be executed before an outstanding request with lower priority. Default priority is g_priority_default.
The asynchronous methods have a default fallback that uses threads to implement asynchronicity, so they are optional for inheriting classes. However, if you override one you must override all.
For the synchronous, blocking version of this function, see writev.
Note that no copy of vectors will be made, so it must stay valid until callback is called.
Parameters:
| this |
A OutputStream. |
| vectors |
the buffer containing the OutputVectors to write. |
| io_priority |
the I/O priority of the request. |
| cancellable |
optional Cancellable object, null to ignore. |
| callback |
a TaskReadyCallback to call when the request is satisfied |
| n_vectors |
the number of vectors to write |
| user_data |
the data to pass to callback function |