X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/ca7e44eedb71bed5a09556bdd8e3fa13be21c9ce..0b2b203572323552d916d5d2c60d100a27ca7f72:/src/simix/smx_private.h

diff --git a/src/simix/smx_private.h b/src/simix/smx_private.h
index 87a76e4379..2b62920590 100644
--- a/src/simix/smx_private.h
+++ b/src/simix/smx_private.h
@@ -201,6 +201,16 @@ typedef struct s_smx_action {
 void SIMIX_context_mod_init(void);
 void SIMIX_context_mod_exit(void);
 
+/* We are using the bottom of the stack to save some information, like the
+ * valgrind_stack_id. Define smx_context_usable_stack_size to give the remaining
+ * size for the stack. */
+#ifdef HAVE_VALGRIND_VALGRIND_H
+# define smx_context_usable_stack_size                                  \
+  (smx_context_stack_size - sizeof(unsigned int)) /* for valgrind_stack_id */
+#else
+# define smx_context_usable_stack_size smx_context_stack_size
+#endif
+
 void *SIMIX_context_stack_new(void);
 void SIMIX_context_stack_delete(void *stack);