X-Git-Url: http://git.lttng.org/?a=blobdiff_plain;f=libringbuffer%2Fbackend.h;h=e26045af2c7318f8bff93813cd9beaae8085db81;hb=1d4981969313da002983ca979bd85c95493f7316;hp=1bd61109ca0096e2685b864324449b5760dc3128;hpb=3d249a072c981fd9a5f0fcd3d4787beab64561e3;p=lttng-ust.git

diff --git a/libringbuffer/backend.h b/libringbuffer/backend.h
index 1bd61109..e26045af 100644
--- a/libringbuffer/backend.h
+++ b/libringbuffer/backend.h
@@ -27,10 +27,12 @@
 /* Ring buffer backend access (read/write) */
 
 extern size_t lib_ring_buffer_read(struct lib_ring_buffer_backend *bufb,
-				   size_t offset, void *dest, size_t len);
+				   size_t offset, void *dest, size_t len,
+				   struct shm_handle *handle);
 
 extern int lib_ring_buffer_read_cstr(struct lib_ring_buffer_backend *bufb,
-				     size_t offset, void *dest, size_t len);
+				     size_t offset, void *dest, size_t len,
+				     struct shm_handle *handle);
 
 /*
  * Return the address where a given offset is located.
@@ -40,10 +42,12 @@ extern int lib_ring_buffer_read_cstr(struct lib_ring_buffer_backend *bufb,
  */
 extern void *
 lib_ring_buffer_offset_address(struct lib_ring_buffer_backend *bufb,
-			       size_t offset);
+			       size_t offset,
+			       struct shm_handle *handle);
 extern void *
 lib_ring_buffer_read_offset_address(struct lib_ring_buffer_backend *bufb,
-				    size_t offset);
+				    size_t offset,
+				    struct shm_handle *handle);
 
 /**
  * lib_ring_buffer_write - write data to a buffer backend
@@ -64,16 +68,17 @@ void lib_ring_buffer_write(const struct lib_ring_buffer_config *config,
 {
 	struct lib_ring_buffer_backend *bufb = &ctx->buf->backend;
 	struct channel_backend *chanb = &ctx->chan->backend;
+	struct shm_handle *handle = ctx->handle;
 	size_t sbidx;
 	size_t offset = ctx->buf_offset;
-	struct lib_ring_buffer_backend_pages *rpages;
+	struct lib_ring_buffer_backend_pages_shmp *rpages;
 	unsigned long sb_bindex, id;
 
 	offset &= chanb->buf_size - 1;
 	sbidx = offset >> chanb->subbuf_size_order;
-	id = shmp(bufb->buf_wsb)[sbidx].id;
+	id = shmp(handle, bufb->buf_wsb)[sbidx].id;
 	sb_bindex = subbuffer_id_get_index(config, id);
-	rpages = shmp(bufb->array)[sb_bindex];
+	rpages = &shmp(handle, bufb->array)[sb_bindex];
 	CHAN_WARN_ON(ctx->chan,
 		     config->mode == RING_BUFFER_OVERWRITE
 		     && subbuffer_id_is_noref(config, id));
@@ -83,7 +88,7 @@ void lib_ring_buffer_write(const struct lib_ring_buffer_config *config,
 	 */
 	CHAN_WARN_ON(chanb, offset >= chanb->buf_size);
 	lib_ring_buffer_do_copy(config,
-				shmp(rpages->p) + (offset & ~(chanb->subbuf_size - 1)),
+				shmp(handle, shmp(handle, rpages->shmp)->p) + (offset & ~(chanb->subbuf_size - 1)),
 				src, len);
 	ctx->buf_offset += len;
 }
@@ -96,24 +101,25 @@ void lib_ring_buffer_write(const struct lib_ring_buffer_config *config,
 static inline
 unsigned long lib_ring_buffer_get_records_unread(
 				const struct lib_ring_buffer_config *config,
-				struct lib_ring_buffer *buf)
+				struct lib_ring_buffer *buf,
+				struct shm_handle *handle)
 {
 	struct lib_ring_buffer_backend *bufb = &buf->backend;
-	struct lib_ring_buffer_backend_pages *pages;
+	struct lib_ring_buffer_backend_pages_shmp *pages;
 	unsigned long records_unread = 0, sb_bindex, id;
 	unsigned int i;
 
-	for (i = 0; i < shmp(bufb->chan)->backend.num_subbuf; i++) {
-		id = shmp(bufb->buf_wsb)[i].id;
+	for (i = 0; i < shmp(handle, bufb->chan)->backend.num_subbuf; i++) {
+		id = shmp(handle, bufb->buf_wsb)[i].id;
 		sb_bindex = subbuffer_id_get_index(config, id);
-		pages = shmp(bufb->array)[sb_bindex];
-		records_unread += v_read(config, &pages->records_unread);
+		pages = &shmp(handle, bufb->array)[sb_bindex];
+		records_unread += v_read(config, &shmp(handle, pages->shmp)->records_unread);
 	}
 	if (config->mode == RING_BUFFER_OVERWRITE) {
 		id = bufb->buf_rsb.id;
 		sb_bindex = subbuffer_id_get_index(config, id);
-		pages = shmp(bufb->array)[sb_bindex];
-		records_unread += v_read(config, &pages->records_unread);
+		pages = &shmp(handle, bufb->array)[sb_bindex];
+		records_unread += v_read(config, &shmp(handle, pages->shmp)->records_unread);
 	}
 	return records_unread;
 }