atomic_queue.h File Reference

Thread-safe queues. More...

#include <stdbool.h>
#include <freeradius-devel/util/stdatomic.h>
#include <freeradius-devel/util/talloc.h>

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Typedefs
typedef struct fr_atomic_queue_s	fr_atomic_queue_t

Functions
fr_atomic_queue_t *	fr_atomic_queue_alloc (TALLOC_CTX *ctx, size_t size)
	Create fixed-size atomic queue.
void	fr_atomic_queue_debug (FILE *fp, fr_atomic_queue_t *aq)
	Dump an atomic queue.
void	fr_atomic_queue_free (fr_atomic_queue_t **aq)
	Free an atomic queue if it's not freed by ctx.
bool	fr_atomic_queue_pop (fr_atomic_queue_t *aq, void **p_data)
	Pop a pointer from the atomic queue.
bool	fr_atomic_queue_push (fr_atomic_queue_t *aq, void *data)
	Push a pointer into the atomic queue.
size_t	fr_atomic_queue_size (fr_atomic_queue_t *aq)

Detailed Description

Thread-safe queues.

Id

82266f72d8f657073a7733a11f127f4fa5ff4d95

Copyright

2016 Alan DeKok (aland.nosp@m.@fre.nosp@m.eradi.nosp@m.us.o.nosp@m.rg)

Definition in file atomic_queue.h.

Typedef Documentation

fr_atomic_queue_t

typedef struct fr_atomic_queue_s fr_atomic_queue_t

Definition at line 41 of file atomic_queue.h.

Function Documentation

fr_atomic_queue_alloc()

fr_atomic_queue_t * fr_atomic_queue_alloc	(	TALLOC_CTX *	ctx,
		size_t	size
	)

Create fixed-size atomic queue.

Note

the queue must be freed explicitly by the ctx being freed, or by using the fr_atomic_queue_free function.

Parameters

[in]	ctx	The talloc ctx to allocate the queue in.
[in]	size	The number of entries in the queue.

Returns

• NULL on error.
• fr_atomic_queue_t *, a pointer to the allocated and initialized queue.

Definition at line 114 of file atomic_queue.c.

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fr_atomic_queue_debug()

void fr_atomic_queue_debug	(	FILE *	fp,
		fr_atomic_queue_t *	aq
	)

Dump an atomic queue.

Absolutely NOT thread-safe.

Parameters

[in]	aq	The atomic queue to debug.
[in]	fp	where the debugging information will be printed.

Definition at line 408 of file atomic_queue.c.

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fr_atomic_queue_free()

void fr_atomic_queue_free

(

fr_atomic_queue_t **

aq

)

Free an atomic queue if it's not freed by ctx.

This function is needed because the atomic queue memory must be cache line aligned.

Definition at line 171 of file atomic_queue.c.

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fr_atomic_queue_pop()

bool fr_atomic_queue_pop	(	fr_atomic_queue_t *	aq,
		void **	p_data
	)

Pop a pointer from the atomic queue.

Parameters

[in]	aq	the atomic queue to retrieve data from.
[out]	p_data	where to write the data.

Returns

• true on successful pop
• false on queue empty

Definition at line 310 of file atomic_queue.c.

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fr_atomic_queue_push()

bool fr_atomic_queue_push	(	fr_atomic_queue_t *	aq,
		void *	data
	)

Push a pointer into the atomic queue.

Parameters

[in]	aq	The atomic queue to add data to.
[in]	data	to push.

Returns

• true on successful push
• false on queue full

Definition at line 187 of file atomic_queue.c.

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fr_atomic_queue_size()

size_t fr_atomic_queue_size

(

fr_atomic_queue_t *

aq

)

Definition at line 372 of file atomic_queue.c.

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