#include "shm_types.h"
#include "vatomic.h"
+#define LIB_RING_BUFFER_MAX_NESTING 5
+
/*
* A switch is done during tracing or as a final flush after tracing (so it
* won't write in the new sub-buffer).
char padding[RB_RING_BUFFER_PADDING];
} __attribute__((aligned(CAA_CACHE_LINE_SIZE)));
+/*
+ * ring buffer private context
+ *
+ * Private context passed to lib_ring_buffer_reserve(), lib_ring_buffer_commit(),
+ * lib_ring_buffer_try_discard_reserve(), lttng_ust_lib_ring_buffer_align_ctx() and
+ * lib_ring_buffer_write().
+ *
+ * This context is allocated on an internal shadow-stack by a successful reserve
+ * operation, used by align/write, and freed by commit.
+ */
+
+struct lttng_ust_lib_ring_buffer_ctx_private {
+ /* input received by lib_ring_buffer_reserve(). */
+ struct lttng_ust_lib_ring_buffer_ctx *pub;
+ struct lttng_ust_lib_ring_buffer_channel *chan; /* channel */
+
+ /* output from lib_ring_buffer_reserve() */
+ int reserve_cpu; /* processor id updated by the reserve */
+ size_t slot_size; /* size of the reserved slot */
+ unsigned long buf_offset; /* offset following the record header */
+ unsigned long pre_offset; /*
+ * Initial offset position _before_
+ * the record is written. Positioned
+ * prior to record header alignment
+ * padding.
+ */
+ uint64_t tsc; /* time-stamp counter value */
+ unsigned int rflags; /* reservation flags */
+ void *ip; /* caller ip address */
+
+ struct lttng_ust_lib_ring_buffer *buf; /*
+ * buffer corresponding to processor id
+ * for this channel
+ */
+ struct lttng_ust_lib_ring_buffer_backend_pages *backend_pages;
+};
+
static inline
void *channel_get_private_config(struct lttng_ust_lib_ring_buffer_channel *chan)
{
_____ret = _____ret; /* For clang "unused result". */ \
})
+/**
+ * lttng_ust_lib_ring_buffer_align_ctx - Align context offset on "alignment"
+ * @ctx: ring buffer context.
+ */
+static inline lttng_ust_notrace
+void lttng_ust_lib_ring_buffer_align_ctx(struct lttng_ust_lib_ring_buffer_ctx *ctx,
+ size_t alignment);
+static inline
+void lttng_ust_lib_ring_buffer_align_ctx(struct lttng_ust_lib_ring_buffer_ctx *ctx,
+ size_t alignment)
+{
+ struct lttng_ust_lib_ring_buffer_ctx_private *ctx_private = ctx->priv;
+
+ ctx_private->buf_offset += lttng_ust_lib_ring_buffer_align(ctx_private->buf_offset,
+ alignment);
+}
+
#endif /* _LTTNG_RING_BUFFER_FRONTEND_TYPES_H */