main.c, pgm.c, pgm.h: Add setup and teardown hooks to the programmer

definition.  If present, call the setup hook immediately after finding
the respective programmer object, and schedule the teardown hook to be
called upon exit.  This allows the programmer implementation to
dynamically allocate private programmer data.

avr910.c, butterfly.c, jtagmkI.c, jtagmkII.c, stk500v2.c, usbasp.c,
usbtiny.c: Convert static programmer data into dynamically allocated
data.


git-svn-id: svn://svn.savannah.nongnu.org/avrdude/trunk/avrdude@764 81a1dc3b-b13d-400b-aceb-764788c761c2

main.c

@@ -1,6 +1,7 @@
 /*
  * avrdude - A Downloader/Uploader for AVR device programmers
  * Copyright (C) 2000-2005  Brian S. Dean <bsd@bsdhome.com>
+ * Copyright 2007 Joerg Wunsch <j@uriah.heep.sax.de>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -74,6 +75,8 @@ static LISTID updates;
 
 static LISTID extended_params;
 
+static PROGRAMMER * pgm;
+
 /*
  * global options
  */
@@ -222,6 +225,12 @@ static void list_parts(FILE * f, const char *prefix, LISTID avrparts)
     walk_avrparts(avrparts, list_avrparts_callback, &c);
 }
 
+static void exithook(void)
+{
+    if (pgm->teardown)
+        pgm->teardown(pgm);
+}
+
 /*
  * main routine
  */
@@ -238,7 +247,6 @@ int main(int argc, char * argv [])
   struct stat      sb;
   UPDATE         * upd;
   LNODEID        * ln;
-  PROGRAMMER     * pgm;
 
 
   /* options / operating mode variables */
@@ -636,6 +644,13 @@ int main(int argc, char * argv [])
     exit(1);
   }
 
+  if (pgm->setup) {
+    pgm->setup(pgm);
+  }
+  if (pgm->teardown) {
+    atexit(exithook);
+  }
+
   if (lsize(extended_params) > 0) {
     if (pgm->parseextparams == NULL) {
       fprintf(stderr,