Attempts to write up to buffer.length bytes from buffer to this, as with
write.
If this is not currently writable, this will immediately return g_io_error_would_block, and you can use create_source to create a SocketSource that will be triggered when this is writable.
Note that since this method never blocks, you cannot actually use cancellable to cancel it. However, it will return an error
if cancellable has already been cancelled when you call, which may happen if you call this method after a source triggers
due to having been cancelled.
| this | |
| buffer |
a buffer to write data from |
| cancellable |
a Cancellable, or null |
| count |
the number of bytes you want to write |
|
the number of bytes written, or -1 on error (including g_io_error_would_block). |