Inline functions for particles

Inlining the functions could still improve a bit the performances.

Currently inlining the read function improves the performances by about 5%. It also helps to cleanup a bit.

src/csds_loader_io.h

@@ -51,7 +51,6 @@ void csds_loader_io_munmap_file(struct mapped_file *map);
 /**
  * @brief read a mask with its offset.
  *
- * @param h #header file structure.
  * @param data Pointer to the data to read.
  * @param mask (output) mask read from the data.
  * @param diff_offset (output) offset difference to previous/next corresponding
@@ -60,7 +59,7 @@ void csds_loader_io_munmap_file(struct mapped_file *map);
  * @return memory after the record header.
  */
 __attribute__((always_inline)) INLINE static char *csds_loader_io_read_mask(
-    const struct header *h, char *data, mask_type *mask, size_t *diff_offset) {
+    char *data, mask_type *mask, size_t *diff_offset) {
   /* read mask */
   if (mask) {
     *mask = 0;