-#ifndef _LTTNG_RING_BUFFER_BACKEND_H
-#define _LTTNG_RING_BUFFER_BACKEND_H
-
/*
- * libringbuffer/backend.h
- *
- * Ring buffer backend (API).
+ * SPDX-License-Identifier: LGPL-2.1-only
*
* Copyright (C) 2011-2012 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 (API).
*
* Credits to Steven Rostedt for proposing to use an extra-subbuffer owned by
* the reader in flight recorder mode.
*/
+#ifndef _LTTNG_RING_BUFFER_BACKEND_H
+#define _LTTNG_RING_BUFFER_BACKEND_H
+
+#include <stddef.h>
#include <unistd.h>
+#include "ust-helper.h"
+
/* Internal helpers */
#include "backend_internal.h"
#include "frontend_internal.h"
/* Ring buffer backend access (read/write) */
+LTTNG_HIDDEN
extern size_t lib_ring_buffer_read(struct lttng_ust_lib_ring_buffer_backend *bufb,
size_t offset, void *dest, size_t len,
struct lttng_ust_shm_handle *handle);
+LTTNG_HIDDEN
extern int lib_ring_buffer_read_cstr(struct lttng_ust_lib_ring_buffer_backend *bufb,
size_t offset, void *dest, size_t len,
struct lttng_ust_shm_handle *handle);
* it's never on a page boundary, it's safe to write directly to this address,
* as long as the write is never bigger than a page size.
*/
+LTTNG_HIDDEN
extern void *
lib_ring_buffer_offset_address(struct lttng_ust_lib_ring_buffer_backend *bufb,
size_t offset,
struct lttng_ust_shm_handle *handle);
+LTTNG_HIDDEN
extern void *
lib_ring_buffer_read_offset_address(struct lttng_ust_lib_ring_buffer_backend *bufb,
size_t offset,
* backend-specific memcpy() operation. Calls the slow path (_ring_buffer_write)
* if copy is crossing a page boundary.
*/
-static inline
+static inline __attribute__((always_inline))
void lib_ring_buffer_write(const struct lttng_ust_lib_ring_buffer_config *config,
struct lttng_ust_lib_ring_buffer_ctx *ctx,
const void *src, size_t len)
* terminating character is found in @src. Returns the number of bytes
* copied. Does *not* terminate @dest with NULL terminating character.
*/
-static inline
+static inline __attribute__((always_inline))
size_t lib_ring_buffer_do_strcpy(const struct lttng_ust_lib_ring_buffer_config *config,
char *dest, const char *src, size_t len)
{
* character is found in @src before @len - 1 characters are copied, pad
* the buffer with @pad characters (e.g. '#').
*/
-static inline
+static inline __attribute__((always_inline))
void lib_ring_buffer_strcpy(const struct lttng_ust_lib_ring_buffer_config *config,
struct lttng_ust_lib_ring_buffer_ctx *ctx,
const char *src, size_t len, int pad)