Move alignment into event write callback

[lttng-modules.git] / include / lttng / events.h

diff --git a/include/lttng/events.h b/include/lttng/events.h
index 1eda3aca197fa5c69c197f09616e50198572a65a..9d07d7ed08f0c96cbe8546859f62aa231278cf92 100644 (file)
--- a/include/lttng/events.h
+++ b/include/lttng/events.h
@@ -109,21 +109,21 @@ struct lttng_kernel_type_sequence {
 struct lttng_kernel_type_struct {
        struct lttng_kernel_type_common parent;
        unsigned int nr_fields;
-       const struct lttng_kernel_event_field **fields; /* Array of pointers to fields. */
+       const struct lttng_kernel_event_field * const *fields;  /* Array of pointers to fields. */
        unsigned int alignment;
 };
 
 struct lttng_kernel_type_variant {
        struct lttng_kernel_type_common parent;
        const char *tag_name;           /* Tag field name. If NULL, use previous field. */
-       const struct lttng_kernel_event_field **choices; /* Array of pointers to fields. */
+       const struct lttng_kernel_event_field * const *choices; /* Array of pointers to fields. */
        unsigned int nr_choices;
        unsigned int alignment;
 };
 
 struct lttng_kernel_enum_desc {
        const char *name;
-       const struct lttng_kernel_enum_entry **entries;
+       const struct lttng_kernel_enum_entry * const *entries;
        unsigned int nr_entries;
        const struct lttng_kernel_probe_desc *probe_desc;
 };
@@ -300,7 +300,7 @@ struct lttng_kernel_probe_ctx {
 
 struct lttng_kernel_tracepoint_class {
        void (*probe_callback)(void);
-       const struct lttng_kernel_event_field **fields; /* event payload */
+       const struct lttng_kernel_event_field * const *fields;  /* event payload */
        unsigned int nr_fields;
        const struct lttng_kernel_probe_desc *probe_desc;
 };
@@ -315,7 +315,7 @@ struct lttng_kernel_event_desc {
 
 struct lttng_kernel_probe_desc {
        const char *provider_name;
-       const struct lttng_kernel_event_desc **event_desc;
+       const struct lttng_kernel_event_desc * const *event_desc;
        unsigned int nr_events;
        struct list_head head;                  /* chain registered probes */
        struct list_head lazy_init_head;
@@ -383,9 +383,9 @@ struct lttng_kernel_channel_buffer_ops {
        int (*event_reserve)(struct lttng_kernel_ring_buffer_ctx *ctx);
        void (*event_commit)(struct lttng_kernel_ring_buffer_ctx *ctx);
        void (*event_write)(struct lttng_kernel_ring_buffer_ctx *ctx, const void *src,
-                           size_t len);
+                           size_t len, size_t alignment);
        void (*event_write_from_user)(struct lttng_kernel_ring_buffer_ctx *ctx,
-                                     const void *src, size_t len);
+                                     const void *src, size_t len, size_t alignment);
        void (*event_memset)(struct lttng_kernel_ring_buffer_ctx *ctx,
                             int c, size_t len);
        void (*event_strcpy)(struct lttng_kernel_ring_buffer_ctx *ctx, const char *src,