svm: allow mq attachments at random offsets

[vpp.git] / src / svm / fifo_segment.h

diff --git a/src/svm/fifo_segment.h b/src/svm/fifo_segment.h
index 006ffc4..195869a 100644 (file)
--- a/src/svm/fifo_segment.h
+++ b/src/svm/fifo_segment.h
@@ -17,6 +17,7 @@
 
 #include <svm/ssvm.h>
 #include <svm/fifo_types.h>
+#include <svm/message_queue.h>
 #include <svm/svm_fifo.h>
 
 typedef enum
@@ -70,6 +71,7 @@ typedef struct
   uword max_byte_index;
   u8 n_slices;                 /**< number of fifo segment slices */
   fifo_slice_private_t *slices; /**< private slice information */
+  svm_msg_q_t *mqs;            /**< private vec of attached mqs */
 } fifo_segment_t;
 
 typedef struct
@@ -129,6 +131,37 @@ void fifo_segment_detach_fifo (fifo_segment_t * fs, svm_fifo_t * f);
 void fifo_segment_attach_fifo (fifo_segment_t * fs, svm_fifo_t * f,
                               u32 slice_index);
 
+/**
+ * Allocate message queue on segment
+ *
+ * @param fs           fifo segment for mq
+ * @param mq_index     index in private mqs vector to use to attach
+ * @param cfg          configuration for mq
+ * @return             attached message queue
+ */
+svm_msg_q_t *fifo_segment_msg_q_alloc (fifo_segment_t *fs, u32 mq_index,
+                                      svm_msg_q_cfg_t *cfg);
+
+/**
+ *  Attach message queue at fifo segment offset
+ *
+ *  @param fs          fifo segment for mq
+ *  @param offset      offset for shared mq on the segment
+ *  @param mq_index    index in private mqs vector to use to attach
+ *  @return            attached message queue
+ */
+svm_msg_q_t *fifo_segment_msg_q_attach (fifo_segment_t *fs, uword offset,
+                                       u32 mq_index);
+
+/**
+ * Message queue offset on segment
+ *
+ * @param fs           fifo segment for mq
+ * @param mq_index     index of mq in private mqs vector
+ * @return             offset of the shared mq the private mq is attached to
+ */
+uword fifo_segment_msg_q_offset (fifo_segment_t *fs, u32 mq_index);
+
 /**
  * Try to preallocate fifo headers
  *