The FreeRADIUS server
$Id: 15bac2a4c627c01d1aa2047687b3418955ac7f00 $
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BIO abstractions for in-memory pipes. More...
#include <freeradius-devel/bio/bio_priv.h>
#include <freeradius-devel/bio/mem.h>
#include <freeradius-devel/bio/pipe.h>
#include <pthread.h>
Go to the source code of this file.
Data Structures | |
struct | fr_bio_pipe_t |
The pipe bio. More... | |
Functions | |
fr_bio_t * | fr_bio_pipe_alloc (TALLOC_CTX *ctx, fr_bio_pipe_cb_funcs_t *cb, size_t buffer_size) |
Allocate a thread-safe pipe which can be used for both reads and writes. More... | |
static int | fr_bio_pipe_destructor (fr_bio_pipe_t *my) |
static ssize_t | fr_bio_pipe_read (fr_bio_t *bio, void *packet_ctx, void *buffer, size_t size) |
Read from the pipe. More... | |
void | fr_bio_pipe_set_eof (fr_bio_t *bio) |
Set EOF. More... | |
static int | fr_bio_pipe_shutdown (fr_bio_t *bio) |
Shutdown callback. More... | |
static ssize_t | fr_bio_pipe_write (fr_bio_t *bio, void *packet_ctx, void const *buffer, size_t size) |
Write to the pipe. More... | |
BIO abstractions for in-memory pipes.
Definition in file pipe.c.
struct fr_bio_pipe_t |
Data Fields | ||
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bool | eof | are we at EOF? |
FR_BIO_COMMON | ||
pthread_mutex_t | mutex | |
fr_bio_t * | next | |
fr_bio_pipe_cb_funcs_t | signal | inform us that the pipe is readable |
fr_bio_t* fr_bio_pipe_alloc | ( | TALLOC_CTX * | ctx, |
fr_bio_pipe_cb_funcs_t * | cb, | ||
size_t | buffer_size | ||
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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, iqt'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 147 of file pipe.c.
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void fr_bio_pipe_set_eof | ( | fr_bio_t * | bio | ) |
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