[lttng-modules.git] / lib / ringbuffer / config.h

#ifndef _LIB_RING_BUFFER_CONFIG_H
#define _LIB_RING_BUFFER_CONFIG_H

/*
 * lib/ringbuffer/config.h
 *
 * Ring buffer configuration header. Note: after declaring the standard inline
 * functions, clients should also include linux/ringbuffer/api.h.
 *
 * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; only
 * version 2.1 of the License.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#include <linux/types.h>
#include <linux/percpu.h>
#include <lib/align.h>
#include <lttng-tracer-core.h>

struct lib_ring_buffer;
struct channel;
struct lib_ring_buffer_config;
struct lib_ring_buffer_ctx;

/*
 * Ring buffer client callbacks. Only used by slow path, never on fast path.
 * For the fast path, record_header_size(), ring_buffer_clock_read() should be
 * provided as inline functions too.  These may simply return 0 if not used by
 * the client.
 */
struct lib_ring_buffer_client_cb {
	/* Mandatory callbacks */

	/* A static inline version is also required for fast path */
	u64 (*ring_buffer_clock_read) (struct channel *chan);
	size_t (*record_header_size) (const struct lib_ring_buffer_config *config,
				      struct channel *chan, size_t offset,
				      size_t *pre_header_padding,
				      struct lib_ring_buffer_ctx *ctx);

	/* Slow path only, at subbuffer switch */
	size_t (*subbuffer_header_size) (void);
	void (*buffer_begin) (struct lib_ring_buffer *buf, u64 tsc,
			      unsigned int subbuf_idx);
	void (*buffer_end) (struct lib_ring_buffer *buf, u64 tsc,
			    unsigned int subbuf_idx, unsigned long data_size);

	/* Optional callbacks (can be set to NULL) */

	/* Called at buffer creation/finalize */
	int (*buffer_create) (struct lib_ring_buffer *buf, void *priv,
			      int cpu, const char *name);
	/*
	 * Clients should guarantee that no new reader handle can be opened
	 * after finalize.
	 */
	void (*buffer_finalize) (struct lib_ring_buffer *buf, void *priv, int cpu);

	/*
	 * Extract header length, payload length and timestamp from event
	 * record. Used by buffer iterators. Timestamp is only used by channel
	 * iterator.
	 */
	void (*record_get) (const struct lib_ring_buffer_config *config,
			    struct channel *chan, struct lib_ring_buffer *buf,
			    size_t offset, size_t *header_len,
			    size_t *payload_len, u64 *timestamp);
};

/*
 * Ring buffer instance configuration.
 *
 * Declare as "static const" within the client object to ensure the inline fast
 * paths can be optimized.
 *
 * alloc/sync pairs:
 *
 * RING_BUFFER_ALLOC_PER_CPU and RING_BUFFER_SYNC_PER_CPU :
 *   Per-cpu buffers with per-cpu synchronization. Tracing must be performed
 *   with preemption disabled (lib_ring_buffer_get_cpu() and
 *   lib_ring_buffer_put_cpu()).
 *
 * RING_BUFFER_ALLOC_PER_CPU and RING_BUFFER_SYNC_GLOBAL :
 *   Per-cpu buffer with global synchronization. Tracing can be performed with
 *   preemption enabled, statistically stays on the local buffers.
 *
 * RING_BUFFER_ALLOC_GLOBAL and RING_BUFFER_SYNC_PER_CPU :
 *   Should only be used for buffers belonging to a single thread or protected
 *   by mutual exclusion by the client. Note that periodical sub-buffer switch
 *   should be disabled in this kind of configuration.
 *
 * RING_BUFFER_ALLOC_GLOBAL and RING_BUFFER_SYNC_GLOBAL :
 *   Global shared buffer with global synchronization.
 *
 * wakeup:
 *
 * RING_BUFFER_WAKEUP_BY_TIMER uses per-cpu timers to poll the
 * buffers and wake up readers if data is ready. Mainly useful for tracers which
 * don't want to call into the wakeup code on the tracing path. Use in
 * combination with "read_timer_interval" channel_create() argument.
 *
 * RING_BUFFER_WAKEUP_BY_WRITER directly wakes up readers when a subbuffer is
 * ready to read. Lower latencies before the reader is woken up. Mainly suitable
 * for drivers.
 *
 * RING_BUFFER_WAKEUP_NONE does not perform any wakeup whatsoever. The client
 * has the responsibility to perform wakeups.
 */
struct lib_ring_buffer_config {
	enum {
		RING_BUFFER_ALLOC_PER_CPU,
		RING_BUFFER_ALLOC_GLOBAL,
	} alloc;
	enum {
		RING_BUFFER_SYNC_PER_CPU,	/* Wait-free */
		RING_BUFFER_SYNC_GLOBAL,	/* Lock-free */
	} sync;
	enum {
		RING_BUFFER_OVERWRITE,		/* Overwrite when buffer full */
		RING_BUFFER_DISCARD,		/* Discard when buffer full */
	} mode;
	enum {
		RING_BUFFER_SPLICE,
		RING_BUFFER_MMAP,
		RING_BUFFER_READ,		/* TODO */
		RING_BUFFER_ITERATOR,
		RING_BUFFER_NONE,
	} output;
	enum {
		RING_BUFFER_PAGE,
		RING_BUFFER_VMAP,		/* TODO */
		RING_BUFFER_STATIC,		/* TODO */
	} backend;
	enum {
		RING_BUFFER_NO_OOPS_CONSISTENCY,
		RING_BUFFER_OOPS_CONSISTENCY,
	} oops;
	enum {
		RING_BUFFER_IPI_BARRIER,
		RING_BUFFER_NO_IPI_BARRIER,
	} ipi;
	enum {
		RING_BUFFER_WAKEUP_BY_TIMER,	/* wake up performed by timer */
		RING_BUFFER_WAKEUP_BY_WRITER,	/*
						 * writer wakes up reader,
						 * not lock-free
						 * (takes spinlock).
						 */
	} wakeup;
	/*
	 * tsc_bits: timestamp bits saved at each record.
	 *   0 and 64 disable the timestamp compression scheme.
	 */
	unsigned int tsc_bits;
	struct lib_ring_buffer_client_cb cb;
};

/*
 * ring buffer context
 *
 * Context passed to lib_ring_buffer_reserve(), lib_ring_buffer_commit(),
 * lib_ring_buffer_try_discard_reserve(), lib_ring_buffer_align_ctx() and
 * lib_ring_buffer_write().
 */
struct lib_ring_buffer_ctx {
	/* input received by lib_ring_buffer_reserve(), saved here. */
	struct channel *chan;		/* channel */
	void *priv;			/* client private data */
	size_t data_size;		/* size of payload */
	int largest_align;		/*
					 * alignment of the largest element
					 * in the payload
					 */
	int cpu;			/* processor id */

	/* output from lib_ring_buffer_reserve() */
	struct lib_ring_buffer *buf;	/*
					 * buffer corresponding to processor id
					 * for this channel
					 */
	size_t slot_size;		/* size of the reserved slot */
	unsigned long buf_offset;	/* offset following the record header */
	unsigned long pre_offset;	/*
					 * Initial offset position _before_
					 * the record is written. Positioned
					 * prior to record header alignment
					 * padding.
					 */
	u64 tsc;			/* time-stamp counter value */
	unsigned int rflags;		/* reservation flags */
	/* Cache backend pages pointer chasing. */
	struct lib_ring_buffer_backend_pages *backend_pages;
};

/**
 * lib_ring_buffer_ctx_init - initialize ring buffer context
 * @ctx: ring buffer context to initialize
 * @chan: channel
 * @priv: client private data
 * @data_size: size of record data payload. It must be greater than 0.
 * @largest_align: largest alignment within data payload types
 * @cpu: processor id
 */
static inline
void lib_ring_buffer_ctx_init(struct lib_ring_buffer_ctx *ctx,
			      struct channel *chan, void *priv,
			      size_t data_size, int largest_align,
			      int cpu)
{
	ctx->chan = chan;
	ctx->priv = priv;
	ctx->data_size = data_size;
	ctx->largest_align = largest_align;
	ctx->cpu = cpu;
	ctx->rflags = 0;
	ctx->backend_pages = NULL;
}

/*
 * Reservation flags.
 *
 * RING_BUFFER_RFLAG_FULL_TSC
 *
 * This flag is passed to record_header_size() and to the primitive used to
 * write the record header. It indicates that the full 64-bit time value is
 * needed in the record header. If this flag is not set, the record header needs
 * only to contain "tsc_bits" bit of time value.
 *
 * Reservation flags can be added by the client, starting from
 * "(RING_BUFFER_FLAGS_END << 0)". It can be used to pass information from
 * record_header_size() to lib_ring_buffer_write_record_header().
 */
#define	RING_BUFFER_RFLAG_FULL_TSC		(1U << 0)
#define RING_BUFFER_RFLAG_END			(1U << 1)

#ifndef LTTNG_TRACER_CORE_H
#error "lttng-tracer-core.h is needed for RING_BUFFER_ALIGN define"
#endif

/*
 * We need to define RING_BUFFER_ALIGN_ATTR so it is known early at
 * compile-time. We have to duplicate the "config->align" information and the
 * definition here because config->align is used both in the slow and fast
 * paths, but RING_BUFFER_ALIGN_ATTR is only available for the client code.
 */
#ifdef RING_BUFFER_ALIGN

# define RING_BUFFER_ALIGN_ATTR		/* Default arch alignment */

/*
 * Calculate the offset needed to align the type.
 * size_of_type must be non-zero.
 */
static inline
unsigned int lib_ring_buffer_align(size_t align_drift, size_t size_of_type)
{
	return offset_align(align_drift, size_of_type);
}

#else

# define RING_BUFFER_ALIGN_ATTR __attribute__((packed))

/*
 * Calculate the offset needed to align the type.
 * size_of_type must be non-zero.
 */
static inline
unsigned int lib_ring_buffer_align(size_t align_drift, size_t size_of_type)
{
	return 0;
}

#endif

/**
 * lib_ring_buffer_align_ctx - Align context offset on "alignment"
 * @ctx: ring buffer context.
 */
static inline
void lib_ring_buffer_align_ctx(struct lib_ring_buffer_ctx *ctx,
			   size_t alignment)
{
	ctx->buf_offset += lib_ring_buffer_align(ctx->buf_offset,
						 alignment);
}

/*
 * lib_ring_buffer_check_config() returns 0 on success.
 * Used internally to check for valid configurations at channel creation.
 */
static inline
int lib_ring_buffer_check_config(const struct lib_ring_buffer_config *config,
			     unsigned int switch_timer_interval,
			     unsigned int read_timer_interval)
{
	if (config->alloc == RING_BUFFER_ALLOC_GLOBAL
	    && config->sync == RING_BUFFER_SYNC_PER_CPU
	    && switch_timer_interval)
		return -EINVAL;
	return 0;
}

#include <wrapper/ringbuffer/vatomic.h>

#endif /* _LIB_RING_BUFFER_CONFIG_H */
Commit	Line	Data
886d51a3 MD	1	#ifndef _LIB_RING_BUFFER_CONFIG_H
886d51a3 MD	2	#define _LIB_RING_BUFFER_CONFIG_H
f3bc08c5 MD	3
f3bc08c5 MD	4	/*
886d51a3	5	* lib/ringbuffer/config.h
f3bc08c5 MD	6	*
	7	* Ring buffer configuration header. Note: after declaring the standard inline
	8	* functions, clients should also include linux/ringbuffer/api.h.
	9	*
886d51a3 MD	10	* Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	11	*
	12	* This library is free software; you can redistribute it and/or
	13	* modify it under the terms of the GNU Lesser General Public
	14	* License as published by the Free Software Foundation; only
	15	* version 2.1 of the License.
	16	*
	17	* This library is distributed in the hope that it will be useful,
	18	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	19	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	20	* Lesser General Public License for more details.
	21	*
	22	* You should have received a copy of the GNU Lesser General Public
	23	* License along with this library; if not, write to the Free Software
	24	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
f3bc08c5 MD	25	*/
	26
	27	#include <linux/types.h>
	28	#include <linux/percpu.h>
5671a661 MD	29	#include <lib/align.h>
5671a661 MD	30	#include <lttng-tracer-core.h>
f3bc08c5 MD	31
	32	struct lib_ring_buffer;
	33	struct channel;
	34	struct lib_ring_buffer_config;
	35	struct lib_ring_buffer_ctx;
	36
	37	/*
	38	* Ring buffer client callbacks. Only used by slow path, never on fast path.
	39	* For the fast path, record_header_size(), ring_buffer_clock_read() should be
	40	* provided as inline functions too. These may simply return 0 if not used by
	41	* the client.
	42	*/
	43	struct lib_ring_buffer_client_cb {
	44	/* Mandatory callbacks */
	45
	46	/* A static inline version is also required for fast path */
	47	u64 (ring_buffer_clock_read) (struct channel chan);
	48	size_t (record_header_size) (const struct lib_ring_buffer_config config,
	49	struct channel *chan, size_t offset,
f3bc08c5	50	size_t *pre_header_padding,
f3bc08c5 MD	51	struct lib_ring_buffer_ctx *ctx);
	52
	53	/* Slow path only, at subbuffer switch */
	54	size_t (*subbuffer_header_size) (void);
	55	void (buffer_begin) (struct lib_ring_buffer buf, u64 tsc,
	56	unsigned int subbuf_idx);
	57	void (buffer_end) (struct lib_ring_buffer buf, u64 tsc,
	58	unsigned int subbuf_idx, unsigned long data_size);
	59
	60	/* Optional callbacks (can be set to NULL) */
	61
	62	/* Called at buffer creation/finalize */
	63	int (buffer_create) (struct lib_ring_buffer buf, void *priv,
	64	int cpu, const char *name);
	65	/*
	66	* Clients should guarantee that no new reader handle can be opened
	67	* after finalize.
	68	*/
	69	void (buffer_finalize) (struct lib_ring_buffer buf, void *priv, int cpu);
	70
	71	/*
	72	* Extract header length, payload length and timestamp from event
	73	* record. Used by buffer iterators. Timestamp is only used by channel
	74	* iterator.
	75	*/
	76	void (record_get) (const struct lib_ring_buffer_config config,
	77	struct channel chan, struct lib_ring_buffer buf,
	78	size_t offset, size_t *header_len,
	79	size_t payload_len, u64 timestamp);
	80	};
	81
	82	/*
	83	* Ring buffer instance configuration.
	84	*
	85	* Declare as "static const" within the client object to ensure the inline fast
	86	* paths can be optimized.
	87	*
	88	* alloc/sync pairs:
	89	*
	90	* RING_BUFFER_ALLOC_PER_CPU and RING_BUFFER_SYNC_PER_CPU :
	91	* Per-cpu buffers with per-cpu synchronization. Tracing must be performed
	92	* with preemption disabled (lib_ring_buffer_get_cpu() and
	93	* lib_ring_buffer_put_cpu()).
	94	*
	95	* RING_BUFFER_ALLOC_PER_CPU and RING_BUFFER_SYNC_GLOBAL :
	96	* Per-cpu buffer with global synchronization. Tracing can be performed with
	97	* preemption enabled, statistically stays on the local buffers.
	98	*
	99	* RING_BUFFER_ALLOC_GLOBAL and RING_BUFFER_SYNC_PER_CPU :
	100	* Should only be used for buffers belonging to a single thread or protected
	101	* by mutual exclusion by the client. Note that periodical sub-buffer switch
	102	* should be disabled in this kind of configuration.
	103	*
	104	* RING_BUFFER_ALLOC_GLOBAL and RING_BUFFER_SYNC_GLOBAL :
	105	* Global shared buffer with global synchronization.
	106	*
	107	* wakeup:
	108	*
da9f3fb7	109	* RING_BUFFER_WAKEUP_BY_TIMER uses per-cpu timers to poll the
f3bc08c5 MD	110	* buffers and wake up readers if data is ready. Mainly useful for tracers which
	111	* don't want to call into the wakeup code on the tracing path. Use in
	112	* combination with "read_timer_interval" channel_create() argument.
	113	*
	114	* RING_BUFFER_WAKEUP_BY_WRITER directly wakes up readers when a subbuffer is
	115	* ready to read. Lower latencies before the reader is woken up. Mainly suitable
	116	* for drivers.
	117	*
	118	* RING_BUFFER_WAKEUP_NONE does not perform any wakeup whatsoever. The client
	119	* has the responsibility to perform wakeups.
	120	*/
	121	struct lib_ring_buffer_config {
	122	enum {
	123	RING_BUFFER_ALLOC_PER_CPU,
	124	RING_BUFFER_ALLOC_GLOBAL,
	125	} alloc;
	126	enum {
	127	RING_BUFFER_SYNC_PER_CPU, /* Wait-free */
	128	RING_BUFFER_SYNC_GLOBAL, /* Lock-free */
	129	} sync;
	130	enum {
	131	RING_BUFFER_OVERWRITE, /* Overwrite when buffer full */
	132	RING_BUFFER_DISCARD, /* Discard when buffer full */
	133	} mode;
	134	enum {
	135	RING_BUFFER_SPLICE,
	136	RING_BUFFER_MMAP,
	137	RING_BUFFER_READ, /* TODO */
	138	RING_BUFFER_ITERATOR,
	139	RING_BUFFER_NONE,
	140	} output;
	141	enum {
	142	RING_BUFFER_PAGE,
	143	RING_BUFFER_VMAP, /* TODO */
	144	RING_BUFFER_STATIC, /* TODO */
	145	} backend;
	146	enum {
	147	RING_BUFFER_NO_OOPS_CONSISTENCY,
	148	RING_BUFFER_OOPS_CONSISTENCY,
	149	} oops;
	150	enum {
	151	RING_BUFFER_IPI_BARRIER,
	152	RING_BUFFER_NO_IPI_BARRIER,
	153	} ipi;
	154	enum {
	155	RING_BUFFER_WAKEUP_BY_TIMER, /* wake up performed by timer */
	156	RING_BUFFER_WAKEUP_BY_WRITER, /*
	157	* writer wakes up reader,
	158	* not lock-free
	159	* (takes spinlock).
	160	*/
	161	} wakeup;
	162	/*
	163	* tsc_bits: timestamp bits saved at each record.
	164	* 0 and 64 disable the timestamp compression scheme.
	165	*/
	166	unsigned int tsc_bits;
	167	struct lib_ring_buffer_client_cb cb;
	168	};
	169
	170	/*
	171	* ring buffer context
	172	*
	173	* Context passed to lib_ring_buffer_reserve(), lib_ring_buffer_commit(),
174	* lib_ring_buffer_try_discard_reserve(), lib_ring_buffer_align_ctx() and
175	* lib_ring_buffer_write().
176	*/
177	struct lib_ring_buffer_ctx {
178	/* input received by lib_ring_buffer_reserve(), saved here. */
179	struct channel chan; / channel */
180	void priv; / client private data */
181	size_t data_size; /* size of payload */
182	int largest_align; /*
183	* alignment of the largest element
184	* in the payload
185	*/
186	int cpu; /* processor id */
187
188	/* output from lib_ring_buffer_reserve() */
189	struct lib_ring_buffer buf; /
190	* buffer corresponding to processor id
191	* for this channel
192	*/
193	size_t slot_size; /* size of the reserved slot */
194	unsigned long buf_offset; /* offset following the record header */
195	unsigned long pre_offset; /*
196	* Initial offset position _before_
197	* the record is written. Positioned
198	* prior to record header alignment
199	* padding.
200	*/
201	u64 tsc; /* time-stamp counter value */
202	unsigned int rflags; /* reservation flags */
85a07c33 MD	203	/* Cache backend pages pointer chasing. */
85a07c33 MD	204	struct lib_ring_buffer_backend_pages *backend_pages;
f3bc08c5 MD	205	};
	206
	207	/**
	208	* lib_ring_buffer_ctx_init - initialize ring buffer context
	209	* @ctx: ring buffer context to initialize
	210	* @chan: channel
	211	* @priv: client private data
3cae7f22	212	* @data_size: size of record data payload. It must be greater than 0.
f3bc08c5 MD	213	* @largest_align: largest alignment within data payload types
	214	* @cpu: processor id
	215	*/
	216	static inline
	217	void lib_ring_buffer_ctx_init(struct lib_ring_buffer_ctx *ctx,
	218	struct channel chan, void priv,
	219	size_t data_size, int largest_align,
	220	int cpu)
	221	{
	222	ctx->chan = chan;
	223	ctx->priv = priv;
	224	ctx->data_size = data_size;
	225	ctx->largest_align = largest_align;
	226	ctx->cpu = cpu;
64c796d8	227	ctx->rflags = 0;
85a07c33	228	ctx->backend_pages = NULL;
f3bc08c5 MD	229	}
	230
	231	/*
	232	* Reservation flags.
	233	*
	234	* RING_BUFFER_RFLAG_FULL_TSC
	235	*
	236	* This flag is passed to record_header_size() and to the primitive used to
	237	* write the record header. It indicates that the full 64-bit time value is
	238	* needed in the record header. If this flag is not set, the record header needs
	239	* only to contain "tsc_bits" bit of time value.
	240	*
	241	* Reservation flags can be added by the client, starting from
	242	* "(RING_BUFFER_FLAGS_END << 0)". It can be used to pass information from
	243	* record_header_size() to lib_ring_buffer_write_record_header().
	244	*/
	245	#define RING_BUFFER_RFLAG_FULL_TSC (1U << 0)
	246	#define RING_BUFFER_RFLAG_END (1U << 1)
	247
ae090dc5 MD	248	#ifndef LTTNG_TRACER_CORE_H
	249	#error "lttng-tracer-core.h is needed for RING_BUFFER_ALIGN define"
	250	#endif
	251
f3bc08c5 MD	252	/*
	253	* We need to define RING_BUFFER_ALIGN_ATTR so it is known early at
	254	* compile-time. We have to duplicate the "config->align" information and the
	255	* definition here because config->align is used both in the slow and fast
	256	* paths, but RING_BUFFER_ALIGN_ATTR is only available for the client code.
	257	*/
	258	#ifdef RING_BUFFER_ALIGN
	259
	260	# define RING_BUFFER_ALIGN_ATTR /* Default arch alignment */
	261
	262	/*
	263	* Calculate the offset needed to align the type.
	264	* size_of_type must be non-zero.
	265	*/
	266	static inline
	267	unsigned int lib_ring_buffer_align(size_t align_drift, size_t size_of_type)
	268	{
	269	return offset_align(align_drift, size_of_type);
	270	}
	271
	272	#else
	273
	274	# define RING_BUFFER_ALIGN_ATTR __attribute__((packed))
	275
	276	/*
	277	* Calculate the offset needed to align the type.
	278	* size_of_type must be non-zero.
	279	*/
	280	static inline
	281	unsigned int lib_ring_buffer_align(size_t align_drift, size_t size_of_type)
	282	{
	283	return 0;
	284	}
	285
	286	#endif
	287
	288	/**
	289	* lib_ring_buffer_align_ctx - Align context offset on "alignment"
	290	* @ctx: ring buffer context.
	291	*/
	292	static inline
	293	void lib_ring_buffer_align_ctx(struct lib_ring_buffer_ctx *ctx,
	294	size_t alignment)
	295	{
	296	ctx->buf_offset += lib_ring_buffer_align(ctx->buf_offset,
	297	alignment);
	298	}
	299
	300	/*
	301	* lib_ring_buffer_check_config() returns 0 on success.
	302	* Used internally to check for valid configurations at channel creation.
	303	*/
	304	static inline
	305	int lib_ring_buffer_check_config(const struct lib_ring_buffer_config *config,
	306	unsigned int switch_timer_interval,
	307	unsigned int read_timer_interval)
	308	{
	309	if (config->alloc == RING_BUFFER_ALLOC_GLOBAL
	310	&& config->sync == RING_BUFFER_SYNC_PER_CPU
	311	&& switch_timer_interval)
	312	return -EINVAL;
	313	return 0;
	314	}
	315
c075712b	316	#include <wrapper/ringbuffer/vatomic.h>
f3bc08c5	317
886d51a3	318	#endif /* _LIB_RING_BUFFER_CONFIG_H */