Refactoring and fix: bytecode ABI

[lttng-ust.git] / libringbuffer / backend.h

diff --git a/libringbuffer/backend.h b/libringbuffer/backend.h
index 46022ad3c5767d7f46db917ee41d2f6e72a98c7b..4ecbfe53886a28bb36a2b6c46eeea59702a84a18 100644 (file)
--- a/libringbuffer/backend.h
+++ b/libringbuffer/backend.h
@@ -1,31 +1,18 @@
-#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>
 
 /* Internal helpers */
@@ -36,10 +23,12 @@
 
 /* Ring buffer backend access (read/write) */
 
+__attribute__((visibility("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);
 
+__attribute__((visibility("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);
@@ -50,10 +39,13 @@ extern int lib_ring_buffer_read_cstr(struct lttng_ust_lib_ring_buffer_backend *b
  * 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.
  */
+__attribute__((visibility("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);
+
+__attribute__((visibility("hidden")))
 extern void *
 lib_ring_buffer_read_offset_address(struct lttng_ust_lib_ring_buffer_backend *bufb,
                                    size_t offset,
@@ -204,7 +196,7 @@ unsigned long lib_ring_buffer_get_records_unread(
        struct lttng_ust_lib_ring_buffer_backend *bufb = &buf->backend;
        unsigned long records_unread = 0, sb_bindex;
        unsigned int i;
-       struct channel *chan;
+       struct lttng_ust_lib_ring_buffer_channel *chan;
 
        chan = shmp(handle, bufb->chan);
        if (!chan)