/********************************* Simcalls *********************************/
-/* we want to build the e_smx_simcall_t enumeration and the table of the
- * corresponding strings automatically, using macros */
+/* we want to build the e_smx_simcall_t enumeration, the table of the
+ * corresponding simcalls string names, and the simcall handlers table
+ * automatically, using macros.
+ * To add a new simcall follow the following syntax:
+ *
+ * SIMCALL_ENUM_ELEMENT(<simcall_enumeration_id>, <simcall_handler_function>)
+ *
+ * */
#define SIMCALL_LIST1 \
SIMCALL_ENUM_ELEMENT(SIMCALL_NONE),\
/* ****************************************************************************************** */ \
SIMCALL_ENUM_ELEMENT(SIMCALL_NEW_API_INIT)
-
/* SIMCALL_COMM_IS_LATENCY_BOUNDED and SIMCALL_SET_CATEGORY make things complicated
* because they are not always present */
#ifdef HAVE_LATENCY_BOUND_TRACKING
#define SIMCALL_LIST2 \
-,SIMCALL_ENUM_ELEMENT(SIMCALL_COMM_IS_LATENCY_BOUNDED)
+,SIMCALL_ENUM_ELEMENT(SIMCALL_COMM_IS_LATENCY_BOUNDED, SIMIX_comm_is_latency_bounded)
#else
#define SIMCALL_LIST2
#endif
#ifdef HAVE_TRACING
#define SIMCALL_LIST3 \
-,SIMCALL_ENUM_ELEMENT(SIMCALL_SET_CATEGORY)
+,SIMCALL_ENUM_ELEMENT(SIMCALL_SET_CATEGORY, SIMIX_set_category)
#else
#define SIMCALL_LIST3
#endif
/* you can redefine the following macro differently to generate something else
* with the list of enumeration values (e.g. a table of strings or a table of function pointers) */
-#define SIMCALL_ENUM_ELEMENT(x) x
+#define SIMCALL_ENUM_ELEMENT(x, y) x
/**
* \brief All possible simcalls.
typedef struct s_smx_simcall {
e_smx_simcall_t call;
smx_process_t issuer;
+ union u_smx_scalar *args;
+ //FIXME: union u_smx_scalar retval;
union {
smx_simcall_t SIMIX_simcall_mine(void);
const char *SIMIX_simcall_name(e_smx_simcall_t kind);
+/*************************** New simcall interface ****************************/
+
+/* Pack all possible scalar types in an union */
+typedef union u_smx_scalar {
+ char c;
+ short s;
+ int i;
+ long l;
+ unsigned char uc;
+ unsigned short us;
+ unsigned int ui;
+ unsigned long ul;
+ float f;
+ double d;
+ void *p;
+} u_smx_scalar_t;
+
+/*
+ * Define scalar type wrappers to ease the use of simcalls.
+ * These are used to wrap the arguments in SIMIX_simcall macro.
+ */
+#define CHAR(x) (c,x)
+#define SHORT(x) (s,x)
+#define INT(x) (i,x)
+#define LONG(x) (l,x)
+#define UCHAR(x) (uc,x)
+#define USHORT(x) (us,x)
+#define UINT(x) (ui,x)
+#define ULONG(x) (ul,x)
+#define FLOAT(x) (f,x)
+#define DOUBLE(x) (d,x)
+#define PTR(x) (p,x)
+
+#define MYMACRO(...)
+
+/*
+ * Some macro machinery to get a MAP over the arguments of a variadic macro.
+ * It uses a FOLD to apply a macro to every argument, and because there is
+ * no recursion in the C preprocessor we must create a new macro for every
+ * depth of FOLD's recursion.
+ */
+
+/* FOLD macro */
+#define FE_1(WHAT, X) WHAT(X)
+#define FE_2(WHAT, X, ...) WHAT(X), FE_1(WHAT, __VA_ARGS__)
+#define FE_3(WHAT, X, ...) WHAT(X), FE_2(WHAT, __VA_ARGS__)
+#define FE_4(WHAT, X, ...) WHAT(X), FE_3(WHAT, __VA_ARGS__)
+#define FE_5(WHAT, X, ...) WHAT(X), FE_4(WHAT, __VA_ARGS__)
+/* NOTE: add as many FE_n as needed (maximum number of simcall arguments )*/
+
+/* Make a MAP macro usgin FOLD (will apply 'action' to the arguments.
+ * GET_MACRO is a smart hack that counts the number of arguments passed to
+ * the variadic macro, and it is used to invoke the right FOLD depth.
+ */
+#define GET_MACRO(_1,_2,_3,_4,_5,NAME,...) NAME
+#define MAP(action,...) \
+ GET_MACRO(__VA_ARGS__,FE_5,FE_4,FE_3,FE_2,FE_1) (action, __VA_ARGS__)
+
+
+/* Generate code to initialize the field 'x' with value 'y' of an structure or union */
+#define INIT_FIELD_(x,y) {.x = y}
+#define INIT_FIELD(t) INIT_FIELD_ t
+
+/* Project the second element of a tuple */
+#define SECOND_(x, y) y
+#define SECOND(t) SECOND_ t
+
+/*
+ * \brief Simcall invocation macro
+ * It calls a dummy function that uses the format attribute to ensure typesafety (see
+ * gcc format attribute), then it invokes the real simcall function packing the
+ * user provided arguments in an array.
+ * \param id a simcall id (from the simcall enumeration ids)
+ *
+ */
+#define SIMIX_simcall(id, ...) \
+ SIMIX_simcall_typecheck(simcall_types[id], MAP(SECOND, __VA_ARGS__)); \
+ __SIMIX_simcall(id, (u_smx_scalar_t[]){MAP(INIT_FIELD, __VA_ARGS__)})
+
+void __SIMIX_simcall(e_smx_simcall_t simcall_id, u_smx_scalar_t *args);
+
+/*
+ * \biref Dummy variadic function used to typecheck the arguments of a simcall
+ * \param fmt A format string following printf style
+ */
+void SIMIX_simcall_typecheck(const char *fmt, ...) __attribute__ ((format (printf, 1, 2)));
+
+typedef smx_action_t (*simcall_handler_t)(u_smx_scalar_t *);
+
+extern const char *simcall_types[];
+extern simcall_handler_t simcall_table[];
+
#endif
