Changes between Version 9 and Version 10 of ResumedC

Timestamp:

Apr 29, 2009, 3:14:10 AM (15 years ago)

Author:

Thanatermesis

Comment:

--

ResumedC

@@ -206 +206 @@
 
 ==== Packaged structures ====
-Image an application that stupidly takes a lot of storage but very few 'cpu' usage and you will need to optimize it for data, you can set the value of the bits to use for the structure elements, like:
+Image an application that stupidly takes a lot of storage but very few 'cpu' usage and you will need to optimize it for data, imagine that it has 3 variables, ''seen'' is used to know if the element is seen, and ''list'' is used to know if the element is on the list, and ''number'' is the number of the element (the ''data''). Between ''number'' needs to be a full ''int'' that requires 16 bits (or a little less than it), you can set ''seen'' and ''list'' to use only 1 bit each one, and ''number'' to use 14 instead of 16, on that way, you will have the full size of the structure 3 times smaller than originally
+
+Normal structure:
+|| ||0 ||1 ||2 ||3 ||4 ||5 ||6 ||7 ||8 ||9 ||10 ||11 ||12 ||13 ||14 ||15 ||
+||seen ||. ||. ||. ||. ||. ||. ||. ||. ||. ||. ||. ||. ||. ||. ||. ||. ||
+||list ||. ||. ||. ||. ||. ||. ||. ||. ||. ||. ||. ||. ||. ||. ||. ||. ||
+||number ||. ||. ||. ||. ||. ||. ||. ||. ||. ||. ||. ||. ||. ||. ||. ||. ||
+
+Packaged structure:
+||0 ||1 ||2 ||3 ||4 ||5 ||6 ||7 ||8 ||9 ||10 ||11 ||12 ||13 ||14 ||15 ||
+||[seen] ||[list] ||[number ||. ||. ||. ||. ||. ||. ||. ||. ||. ||. ||. ||. ||number] ||
 {{{
 #!C
 struct item {
    unsigned int seen:1;
-   ...
+   unsigned int list:1;
+   unsigned int number:14;
    }
-/* Now the variable 'seen' (seen or not seen) only takes one BIT */
 }}}
  The bad point of this usage is that it the access to this data is pretty more slow than in normal mode, so do this only when is really needed to save storage space.