return n;
}
+
+/*
+ * The following is the example included in the documentation. It's a good
+ * idea to check its syntax even if we don't try to run it.
+ * And actually, it allows to put comments in the code despite doxygen.
+ */
+static char *mallocex(int size) {
+ return NULL;
+}
+#define SMALLAMOUNT 10
+#define TOOBIG 100000000
+
+#if 0 /* this contains syntax errors, actually */
+static void bad_example(void) {
+ struct {char*first;} *globalcontext;
+ ex_t ex;
+
+ /* BAD_EXAMPLE */
+ xbt_try {
+ char *cp1, *cp2, *cp3;
+
+ cp1 = mallocex(SMALLAMOUNT);
+ globalcontext->first = cp1;
+ cp2 = mallocex(TOOBIG);
+ cp3 = mallocex(SMALLAMOUNT);
+ strcpy(cp1, "foo");
+ strcpy(cp2, "bar");
+ } xbt_cleanup {
+ if (cp3 != NULL) free(cp3);
+ if (cp2 != NULL) free(cp2);
+ if (cp1 != NULL) free(cp1);
+ } xbt_catch(ex) {
+ printf("cp3=%s", cp3);
+ xbt_rethrow;
+ }
+ /* end_of_bad_example */
+}
+#endif
+
+static void good_example(void) {
+ struct {char*first;} *globalcontext;
+ ex_t ex;
+
+ /* GOOD_EXAMPLE */
+ { /*01*/
+ char * volatile /*03*/ cp1 = NULL /*02*/;
+ char * volatile /*03*/ cp2 = NULL /*02*/;
+ char * volatile /*03*/ cp3 = NULL /*02*/;
+ xbt_try {
+ cp1 = mallocex(SMALLAMOUNT);
+ globalcontext->first = cp1;
+ cp1 = NULL /*05 give away*/;
+ cp2 = mallocex(TOOBIG);
+ cp3 = mallocex(SMALLAMOUNT);
+ strcpy(cp1, "foo");
+ strcpy(cp2, "bar");
+ } xbt_cleanup { /*04*/
+ printf("cp3=%s", cp3 == NULL /*02*/ ? "" : cp3);
+ if (cp3 != NULL)
+ free(cp3);
+ if (cp2 != NULL)
+ free(cp2);
+ /*05 cp1 was given away */
+ } xbt_catch(ex) {
+ /*05 global context untouched */
+ xbt_rethrow;
+ }
+ }
+ /* end_of_good_example */
+}
