Move to kernel style SPDX license identifiers

[lttng-ust.git] / libringbuffer / ring_buffer_backend.c

diff --git a/libringbuffer/ring_buffer_backend.c b/libringbuffer/ring_buffer_backend.c
index 431b8eae949250c1d51bbbe981aac84c42ee5edf..b50c2f3c406405000d8a830af1d19bfe48622e7d 100644 (file)
--- a/libringbuffer/ring_buffer_backend.c
+++ b/libringbuffer/ring_buffer_backend.c
@@ -1,29 +1,17 @@
 /*
- * ring_buffer_backend.c
+ * 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
  */
 
-#define _GNU_SOURCE
 #define _LGPL_SOURCE
+#include <stddef.h>
+#include <stdint.h>
 #include <unistd.h>
 #include <urcu/arch.h>
 #include <limits.h>
 
+#include <lttng/align.h>
 #include <lttng/ringbuffer-config.h>
 #include "vatomic.h"
 #include "backend.h"
@@ -63,7 +51,7 @@ int lib_ring_buffer_backend_allocate(const struct lttng_ust_lib_ring_buffer_conf
        if (extra_reader_sb)
                num_subbuf_alloc++;
 
-       page_size = sysconf(_SC_PAGE_SIZE);
+       page_size = LTTNG_UST_PAGE_SIZE;
        if (page_size <= 0) {
                goto page_size_error;
        }
@@ -280,7 +268,7 @@ int channel_backend_init(struct channel_backend *chanb,
        if (!name)
                return -EPERM;
 
-       page_size = sysconf(_SC_PAGE_SIZE);
+       page_size = LTTNG_UST_PAGE_SIZE;
        if (page_size <= 0) {
                return -ENOMEM;
        }
@@ -320,30 +308,29 @@ int channel_backend_init(struct channel_backend *chanb,
        memcpy(&chanb->config, config, sizeof(*config));
 
        /* Per-cpu buffer size: control (prior to backend) */
-       shmsize = offset_align(shmsize, __alignof__(struct lttng_ust_lib_ring_buffer));
+       shmsize = lttng_ust_offset_align(shmsize, __alignof__(struct lttng_ust_lib_ring_buffer));
        shmsize += sizeof(struct lttng_ust_lib_ring_buffer);
+       shmsize += lttng_ust_offset_align(shmsize, __alignof__(struct commit_counters_hot));
+       shmsize += sizeof(struct commit_counters_hot) * num_subbuf;
+       shmsize += lttng_ust_offset_align(shmsize, __alignof__(struct commit_counters_cold));
+       shmsize += sizeof(struct commit_counters_cold) * num_subbuf;
+       /* Sampled timestamp end */
+       shmsize += lttng_ust_offset_align(shmsize, __alignof__(uint64_t));
+       shmsize += sizeof(uint64_t) * num_subbuf;
 
        /* Per-cpu buffer size: backend */
        /* num_subbuf + 1 is the worse case */
        num_subbuf_alloc = num_subbuf + 1;
-       shmsize += offset_align(shmsize, __alignof__(struct lttng_ust_lib_ring_buffer_backend_pages_shmp));
+       shmsize += lttng_ust_offset_align(shmsize, __alignof__(struct lttng_ust_lib_ring_buffer_backend_pages_shmp));
        shmsize += sizeof(struct lttng_ust_lib_ring_buffer_backend_pages_shmp) * num_subbuf_alloc;
-       shmsize += offset_align(shmsize, page_size);
+       shmsize += lttng_ust_offset_align(shmsize, page_size);
        shmsize += subbuf_size * num_subbuf_alloc;
-       shmsize += offset_align(shmsize, __alignof__(struct lttng_ust_lib_ring_buffer_backend_pages));
+       shmsize += lttng_ust_offset_align(shmsize, __alignof__(struct lttng_ust_lib_ring_buffer_backend_pages));
        shmsize += sizeof(struct lttng_ust_lib_ring_buffer_backend_pages) * num_subbuf_alloc;
-       shmsize += offset_align(shmsize, __alignof__(struct lttng_ust_lib_ring_buffer_backend_subbuffer));
+       shmsize += lttng_ust_offset_align(shmsize, __alignof__(struct lttng_ust_lib_ring_buffer_backend_subbuffer));
        shmsize += sizeof(struct lttng_ust_lib_ring_buffer_backend_subbuffer) * num_subbuf;
-       shmsize += offset_align(shmsize, __alignof__(struct lttng_ust_lib_ring_buffer_backend_counts));
+       shmsize += lttng_ust_offset_align(shmsize, __alignof__(struct lttng_ust_lib_ring_buffer_backend_counts));
        shmsize += sizeof(struct lttng_ust_lib_ring_buffer_backend_counts) * num_subbuf;
-       /* Per-cpu buffer size: control (after backend) */
-       shmsize += offset_align(shmsize, __alignof__(struct commit_counters_hot));
-       shmsize += sizeof(struct commit_counters_hot) * num_subbuf;
-       shmsize += offset_align(shmsize, __alignof__(struct commit_counters_cold));
-       shmsize += sizeof(struct commit_counters_cold) * num_subbuf;
-       /* Sampled timestamp end */
-       shmsize += offset_align(shmsize, __alignof__(uint64_t));
-       shmsize += sizeof(uint64_t) * num_subbuf;
 
        if (config->alloc == RING_BUFFER_ALLOC_PER_CPU) {
                struct lttng_ust_lib_ring_buffer *buf;