-#ifndef _LTTNG_RING_BUFFER_BACKEND_INTERNAL_H
-#define _LTTNG_RING_BUFFER_BACKEND_INTERNAL_H
-
/*
- * libringbuffer/backend_internal.h
- *
- * Ring buffer backend (internal helpers).
+ * SPDX-License-Identifier: LGPL-2.1-only
*
* Copyright (C) 2005-2012 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
+ * Ring buffer backend (internal helpers).
*/
+#ifndef _LTTNG_RING_BUFFER_BACKEND_INTERNAL_H
+#define _LTTNG_RING_BUFFER_BACKEND_INTERNAL_H
+
#include <stddef.h>
#include <stdint.h>
#include <unistd.h>
#include <urcu/compiler.h>
-#include <lttng/ringbuffer-config.h>
+#include <lttng/ringbuffer-context.h>
+#include "ringbuffer-config.h"
#include "backend_types.h"
#include "frontend_types.h"
#include "shm.h"
/* Ring buffer and channel backend create/free */
int lib_ring_buffer_backend_create(struct lttng_ust_lib_ring_buffer_backend *bufb,
- struct channel_backend *chan, int cpu,
+ struct channel_backend *chan,
+ int cpu,
struct lttng_ust_shm_handle *handle,
- struct shm_object *shmobj);
-void channel_backend_unregister_notifiers(struct channel_backend *chanb);
-void lib_ring_buffer_backend_free(struct lttng_ust_lib_ring_buffer_backend *bufb);
+ struct shm_object *shmobj)
+ __attribute__((visibility("hidden")));
+
+void channel_backend_unregister_notifiers(struct channel_backend *chanb)
+ __attribute__((visibility("hidden")));
+
+void lib_ring_buffer_backend_free(struct lttng_ust_lib_ring_buffer_backend *bufb)
+ __attribute__((visibility("hidden")));
+
int channel_backend_init(struct channel_backend *chanb,
const char *name,
const struct lttng_ust_lib_ring_buffer_config *config,
size_t subbuf_size,
size_t num_subbuf, struct lttng_ust_shm_handle *handle,
- const int *stream_fds);
+ const int *stream_fds)
+ __attribute__((visibility("hidden")));
+
void channel_backend_free(struct channel_backend *chanb,
- struct lttng_ust_shm_handle *handle);
+ struct lttng_ust_shm_handle *handle)
+ __attribute__((visibility("hidden")));
void lib_ring_buffer_backend_reset(struct lttng_ust_lib_ring_buffer_backend *bufb,
- struct lttng_ust_shm_handle *handle);
-void channel_backend_reset(struct channel_backend *chanb);
+ struct lttng_ust_shm_handle *handle)
+ __attribute__((visibility("hidden")));
+
+void channel_backend_reset(struct channel_backend *chanb)
+ __attribute__((visibility("hidden")));
+
+int lib_ring_buffer_backend_init(void)
+ __attribute__((visibility("hidden")));
-int lib_ring_buffer_backend_init(void);
-void lib_ring_buffer_backend_exit(void);
+void lib_ring_buffer_backend_exit(void)
+ __attribute__((visibility("hidden")));
extern void _lib_ring_buffer_write(struct lttng_ust_lib_ring_buffer_backend *bufb,
size_t offset, const void *src, size_t len,
- ssize_t pagecpy);
+ ssize_t pagecpy)
+ __attribute__((visibility("hidden")));
/*
* Subbuffer ID bits for overwrite mode. Need to fit within a single word to be
struct lttng_ust_lib_ring_buffer_ctx *ctx,
struct lttng_ust_lib_ring_buffer_backend_pages **backend_pages)
{
- struct lttng_ust_lib_ring_buffer_backend *bufb = &ctx->buf->backend;
- struct channel_backend *chanb = &ctx->chan->backend;
- struct lttng_ust_shm_handle *handle = ctx->handle;
+ struct lttng_ust_lib_ring_buffer_ctx_private *ctx_private = ctx->priv;
+ struct lttng_ust_lib_ring_buffer_backend *bufb = &ctx_private->buf->backend;
+ struct channel_backend *chanb = &ctx_private->chan->backend;
+ struct lttng_ust_shm_handle *handle = ctx_private->chan->handle;
size_t sbidx;
- size_t offset = ctx->buf_offset;
+ size_t offset = ctx_private->buf_offset;
struct lttng_ust_lib_ring_buffer_backend_subbuffer *wsb;
struct lttng_ust_lib_ring_buffer_backend_pages_shmp *rpages;
unsigned long sb_bindex, id;
rpages = shmp_index(handle, bufb->array, sb_bindex);
if (caa_unlikely(!rpages))
return -1;
- CHAN_WARN_ON(ctx->chan,
+ CHAN_WARN_ON(ctx_private->chan,
config->mode == RING_BUFFER_OVERWRITE
&& subbuffer_id_is_noref(config, id));
_backend_pages = shmp(handle, rpages->shmp);
lib_ring_buffer_get_backend_pages_from_ctx(const struct lttng_ust_lib_ring_buffer_config *config,
struct lttng_ust_lib_ring_buffer_ctx *ctx)
{
- if (caa_unlikely(ctx->ctx_len
- < sizeof(struct lttng_ust_lib_ring_buffer_ctx)))
- return NULL;
- return ctx->backend_pages;
+ return ctx->priv->backend_pages;
}
/*
struct lttng_ust_shm_handle *handle)
{
unsigned long sb_bindex;
- struct channel *chan;
+ struct lttng_ust_lib_ring_buffer_channel *chan;
struct lttng_ust_lib_ring_buffer_backend_pages_shmp *pages_shmp;
struct lttng_ust_lib_ring_buffer_backend_pages *backend_pages;
struct lttng_ust_shm_handle *handle)
{
struct lttng_ust_lib_ring_buffer_backend_subbuffer *wsb;
- struct channel *chan;
+ struct lttng_ust_lib_ring_buffer_channel *chan;
if (config->mode != RING_BUFFER_OVERWRITE)
return;
return -EPERM;
if (config->mode == RING_BUFFER_OVERWRITE) {
- struct channel *chan;
+ struct lttng_ust_lib_ring_buffer_channel *chan;
/*
* Exchange the target writer subbuffer with our own unused
* write len bytes to dest with c
*/
static inline
-void lib_ring_buffer_do_memset(char *dest, int c, unsigned long len)
+void lib_ring_buffer_do_memset(char *dest, char c, unsigned long len)
{
unsigned long i;