Update to urcu/ref.h and urcu/uatomic.h

[ust.git] / libust / channels.h

diff --git a/libust/channels.h b/libust/channels.h
index d96e25b279b5e41f8b132e1e3b307f6e4fdda381..eb9a11c76849d1d6f88fb940ab89ea819f0952cc 100644 (file)
--- a/libust/channels.h
+++ b/libust/channels.h
@@ -1,31 +1,49 @@
-#ifndef _LTT_CHANNELS_H
-#define _LTT_CHANNELS_H
+#ifndef UST_CHANNELS_H
+#define UST_CHANNELS_H
 
 /*
  * Copyright (C) 2008 Mathieu Desnoyers (mathieu.desnoyers@polymtl.ca)
  *
  * Dynamic tracer channel allocation.
+ *
+ * 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; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * 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 _LGPL_SOURCE
 #include <linux/limits.h>
-//ust// #include <linux/kref.h>
-//ust// #include <linux/list.h>
 #include <errno.h>
-
-#include "kernelcompat.h"
-#include <kcompat/kref.h>
+#include <ust/kcompat/kcompat.h>
+#include <ust/core.h>
+#include <urcu/list.h>
+#include <urcu/ref.h>
 
 #define EVENTS_PER_CHANNEL     65536
+#define MAX_CPUS               32
 
-struct ltt_trace_struct;
-struct rchan_buf;
+struct ust_trace;
 
-struct ltt_channel_struct {
+struct ust_buffer;
+
+struct ust_channel {
        /* First 32 bytes cache-hot cacheline */
-       struct ltt_trace_struct *trace;
-       void *buf;
-       void *trans_channel_data;
+       struct ust_trace *trace;
+       int *buf_struct_shmids;
+       struct ust_buffer **buf;
        int overwrite:1;
+       /* whether collection is requested upon trace start */
+       int request_collection:1;
        int active:1;
        unsigned int n_subbufs_order;
        unsigned long commit_count_mask;        /*
@@ -36,48 +54,44 @@ struct ltt_channel_struct {
                                                 */
        /* End of first 32 bytes cacheline */
 
-       /*
-        * buffer_begin - called on buffer-switch to a new sub-buffer
-        * @buf: the channel buffer containing the new sub-buffer
-        */
-       void (*buffer_begin) (struct rchan_buf *buf,
-                       u64 tsc, unsigned int subbuf_idx);
-       /*
-        * buffer_end - called on buffer-switch to a new sub-buffer
-        * @buf: the channel buffer containing the previous sub-buffer
-        */
-       void (*buffer_end) (struct rchan_buf *buf,
-                       u64 tsc, unsigned int offset, unsigned int subbuf_idx);
-       struct kref kref;       /* Channel transport reference count */
-       unsigned int subbuf_size;
+       struct urcu_ref urcu_ref;       /* Channel transport reference count */
+       size_t subbuf_size;
+       int subbuf_size_order;
        unsigned int subbuf_cnt;
        const char *channel_name;
+       int n_cpus;
 
-       int buf_shmid;
+       u32 version;
+       size_t alloc_size;
+       struct cds_list_head list;
 } ____cacheline_aligned;
 
 struct ltt_channel_setting {
        unsigned int subbuf_size;
        unsigned int subbuf_cnt;
-       struct kref kref;       /* Number of references to structure content */
-       struct list_head list;
+       struct urcu_ref urcu_ref;       /* Number of references to structure content */
+       struct cds_list_head list;
        unsigned int index;     /* index of channel in trace channel array */
        u16 free_event_id;      /* Next event ID to allocate */
        char name[PATH_MAX];
 };
 
-int ltt_channels_register(const char *name);
-int ltt_channels_unregister(const char *name);
-int ltt_channels_set_default(const char *name,
+extern int ltt_channels_register(const char *name);
+extern int ltt_channels_unregister(const char *name);
+extern int ltt_channels_set_default(const char *name,
                             unsigned int subbuf_size,
                             unsigned int subbuf_cnt);
-const char *ltt_channels_get_name_from_index(unsigned int index);
-int ltt_channels_get_index_from_name(const char *name);
-struct ltt_channel_struct *ltt_channels_trace_alloc(unsigned int *nr_channels,
+extern const char *ltt_channels_get_name_from_index(unsigned int index);
+extern int ltt_channels_get_index_from_name(const char *name);
+extern struct ust_channel *ltt_channels_trace_alloc(unsigned int *nr_channels,
                                                    int overwrite,
+                                                   int request_collection,
                                                    int active);
-void ltt_channels_trace_free(struct ltt_channel_struct *channels);
-int _ltt_channels_get_event_id(const char *channel, const char *name);
-int ltt_channels_get_event_id(const char *channel, const char *name);
+extern void ltt_channels_trace_free(struct ust_channel *channels);
+extern int _ltt_channels_get_event_id(const char *channel, const char *name);
+extern int ltt_channels_get_event_id(const char *channel, const char *name);
+
+extern int ust_channels_overwrite_by_default;
+extern int ust_channels_request_collection_by_default;
 
-#endif /* _LTT_CHANNELS_H */
+#endif /* UST_CHANNELS_H */