pipe.h File Reference

BIO pipe handlers. More...

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Functions
fr_bio_t *	fr_bio_pipe_alloc (TALLOC_CTX *ctx, fr_bio_cb_funcs_t *cb, size_t buffer_size)
	Allocate a thread-safe pipe which can be used for both reads and writes.

Detailed Description

BIO pipe handlers.

Id

335a19132bed9264d99844c53c4b0ffb3e585757

Copyright

2024 Network RADIUS SAS (legal.nosp@m.@net.nosp@m.workr.nosp@m.adiu.nosp@m.s.com)

Definition in file pipe.h.

Function Documentation

fr_bio_pipe_alloc()

fr_bio_t * fr_bio_pipe_alloc	(	TALLOC_CTX *	ctx,
		fr_bio_cb_funcs_t *	cb,
		size_t	buffer_size
	)

Allocate a thread-safe pipe which can be used for both reads and writes.

Due to talloc issues with multiple threads, if the caller wants a bi-directional pipe, this function will need to be called twice. That way a free in each context won't result in a race condition on two mutex locks.

For now, it's too difficult to emulate the pipe[2] behavior, where two identical "connected" things are returned, and either can be used for reading or for writing.

i.e. a pipe is really a mutex-protected memory buffer. One side should call write (and never read). The other side should call read (and never write).

The pipe should be freed only after both ends have set EOF.

Definition at line 181 of file pipe.c.

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