-#ifndef _LINUX_RING_BUFFER_BACKEND_TYPES_H
-#define _LINUX_RING_BUFFER_BACKEND_TYPES_H
+#ifndef _LIB_RING_BUFFER_BACKEND_TYPES_H
+#define _LIB_RING_BUFFER_BACKEND_TYPES_H
/*
- * linux/ringbuffer/backend_types.h
- *
- * Copyright (C) 2008-2010 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * lib/ringbuffer/backend_types.h
*
* Ring buffer backend (types).
*
- * Dual LGPL v2.1/GPL v2 license.
+ * Copyright (C) 2008-2012 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
*/
#include <linux/cpumask.h>
struct channel *chan; /* Associated channel */
int cpu; /* This buffer's cpu. -1 if global. */
union v_atomic records_read; /* Number of records read */
- unsigned int allocated:1; /* Bool: is buffer allocated ? */
+ unsigned int allocated:1; /* is buffer allocated ? */
};
struct channel_backend {
* for writer.
*/
unsigned int buf_size_order; /* Order of buffer size */
- int extra_reader_sb:1; /* Bool: has extra reader subbuffer */
+ unsigned int extra_reader_sb:1; /* has extra reader subbuffer ? */
struct lib_ring_buffer *buf; /* Channel per-cpu buffers */
unsigned long num_subbuf; /* Number of sub-buffers for writer */
u64 start_tsc; /* Channel creation TSC value */
void *priv; /* Client-specific information */
struct notifier_block cpu_hp_notifier; /* CPU hotplug notifier */
- const struct lib_ring_buffer_config *config; /* Ring buffer configuration */
+ /*
+ * We need to copy config because the module containing the
+ * source config can vanish before the last reference to this
+ * channel's streams is released.
+ */
+ struct lib_ring_buffer_config config; /* Ring buffer configuration */
cpumask_var_t cpumask; /* Allocated per-cpu buffers cpumask */
char name[NAME_MAX]; /* Channel name */
};
-#endif /* _LINUX_RING_BUFFER_BACKEND_TYPES_H */
+#endif /* _LIB_RING_BUFFER_BACKEND_TYPES_H */