-#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 */
+__attribute__((visibility("hidden")))
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);
+
+__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);
+
+__attribute__((visibility("hidden")))
void channel_backend_free(struct channel_backend *chanb,
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);
+
+__attribute__((visibility("hidden")))
void channel_backend_reset(struct channel_backend *chanb);
+__attribute__((visibility("hidden")))
int lib_ring_buffer_backend_init(void);
+
+__attribute__((visibility("hidden")))
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);
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;
}
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
#define inline_memcpy(dest, src, n) memcpy(dest, src, n)
#endif
+static inline __attribute__((always_inline))
+void lttng_inline_memcpy(void *dest, const void *src,
+ unsigned long len)
+{
+ switch (len) {
+ case 1:
+ *(uint8_t *) dest = *(const uint8_t *) src;
+ break;
+ case 2:
+ *(uint16_t *) dest = *(const uint16_t *) src;
+ break;
+ case 4:
+ *(uint32_t *) dest = *(const uint32_t *) src;
+ break;
+ case 8:
+ *(uint64_t *) dest = *(const uint64_t *) src;
+ break;
+ default:
+ inline_memcpy(dest, src, len);
+ }
+}
+
/*
* Use the architecture-specific memcpy implementation for constant-sized
* inputs, but rely on an inline memcpy for length statically unknown.
if (__builtin_constant_p(len)) \
memcpy(dest, src, __len); \
else \
- inline_memcpy(dest, src, __len); \
+ lttng_inline_memcpy(dest, src, __len); \
} while (0)
/*
* 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;
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