fix off by one

git-svn-id: http://ltt.polymtl.ca/svn@2477 04897980-b3bd-0310-b5e0-8ef037075253

diff --git a/ltt-usertrace/ltt/ltt-usertrace-fast.h b/ltt-usertrace/ltt/ltt-usertrace-fast.h
index 2958875571f6314c40d6728518f07440a9ba0681..fd96593536ea91d366bece745e78245f7e8ad794 100644 (file)
--- a/ltt-usertrace/ltt/ltt-usertrace-fast.h
+++ b/ltt-usertrace/ltt/ltt-usertrace-fast.h
@@ -629,7 +629,7 @@ static inline void * __attribute__((no_instrument_function)) ltt_reserve_slot(
  * Parameters:
  *
  * @buf : the buffer to commit to.
- * @reserved : address of the beginnig of the reserved slot.
+ * @reserved : address of the end of the event header.
  * @slot_size : size of the reserved slot.
  *
  */
@@ -638,17 +638,17 @@ static inline void __attribute__((no_instrument_function)) ltt_commit_slot(
                                                                                                                        void *reserved,
                                                                                                                        unsigned int slot_size)
 {
-       unsigned int offset_begin = reserved - ltt_buf->start;
+       unsigned int offset_end = reserved - ltt_buf->start;
        int commit_count;
 
        commit_count = atomic_add_return(slot_size,
-                                                                                                       &ltt_buf->commit_count[SUBBUF_INDEX(offset_begin,
+                                                                                                       &ltt_buf->commit_count[SUBBUF_INDEX(offset_end-1,
                                                                                                                                                                                                                                                        ltt_buf)]);
        
        /* Check if all commits have been done */
        if(commit_count ==
-       atomic_read(&ltt_buf->reserve_count[SUBBUF_INDEX(offset_begin, ltt_buf)])) {
-               ltt_deliver_callback(ltt_buf, SUBBUF_INDEX(offset_begin, ltt_buf), NULL);
+       atomic_read(&ltt_buf->reserve_count[SUBBUF_INDEX(offset_end-1, ltt_buf)])) {
+               ltt_deliver_callback(ltt_buf, SUBBUF_INDEX(offset_end-1, ltt_buf), NULL);
        }
 }