XBT_PUBLIC_DATA const char* simcall_names[]; /* Name of each simcall */
-typedef int (*simix_match_func_t)(void*, void*, simgrid::kernel::activity::CommImpl*);
+typedef bool (*simix_match_func_t)(void*, void*, simgrid::kernel::activity::CommImpl*);
typedef void (*simix_copy_data_func_t)(simgrid::kernel::activity::CommImpl*, void*, size_t);
typedef void (*simix_clean_func_t)(void*);
typedef void (*FPtr)(void); // Hide the ugliness