ref: b39057dffedac61fd6c028908a9aaadf4426b446
dir: /man/2/bufio-chanfill/
.TH BUFIO-CHANFILL 2 .SH NAME bufio: chanfill \- buffered I/O interface to named channel .SH SYNOPSIS .EX include "bufio.m"; chanfill := load ChanFill ChanFill->PATH; init: fn(data: array of byte, fid: int, wc: Sys->Rwrite, r: ref Sys->FileIO, b: Bufio): ref Bufio->Iobuf; fill: fn(b: ref Bufio->Iobuf): int; .EE .SH DESCRIPTION .B ChanFill is an implementation of .B BufioFill (see .IR bufio (2)) that refills an .B Iobuf as data is written to a file created by .IR sys-file2chan (2), which is allowed only one writer. .B Init returns an .B Iobuf allocated from the .B Bufio instance .IR b , that when read will return data written to the file by another process. .IR Data , .IR fid and .IR wc are the values in the tuple presented by .B Sys->file2chan on the first write. .I Data becomes the initial data for the .BR Iobuf ; .B init replies to the writer on .IR wc . The other values are saved for use by .BR fill : on later calls to by .B Bufio to refill the buffer, .B fill waits for a new write request on .IB fio .write and either fills the buffer or signals end-of-file appropriately. .SH SEE ALSO .IR bufio (2)