#include "lua_private.h"
#include <lauxlib.h>
+#include <simgrid/host.h>
XBT_LOG_NEW_DEFAULT_SUBCATEGORY(lua_host, bindings, "Lua bindings (host module)");
#define HOST_MODULE_NAME "simgrid.host"
-
+#define HOST_FIELDNAME "__simgrid_host"
/* ********************************************************************************* */
/* simgrid.host API */
/* ********************************************************************************* */
/**
* \brief Ensures that a value in the stack is a host and returns it.
+ *
+ * This function is called from C and helps to verify that a specific
+ * userdatum on the stack is in fact a sg_host_t.
+ *
* \param L a Lua state
* \param index an index in the Lua stack
* \return the C host corresponding to this Lua host
*/
-msg_host_t sglua_check_host(lua_State * L, int index)
+sg_host_t sglua_check_host(lua_State * L, int index)
{
- msg_host_t *pi, ht;
+ sg_host_t *pi, ht;
luaL_checktype(L, index, LUA_TTABLE);
- lua_getfield(L, index, "__simgrid_host");
- pi = (msg_host_t *) luaL_checkudata(L, lua_gettop(L), HOST_MODULE_NAME);
+ lua_getfield(L, index, HOST_FIELDNAME);
+ pi = (sg_host_t *) luaL_checkudata(L, lua_gettop(L), HOST_MODULE_NAME);
if (pi == NULL)
XBT_ERROR("luaL_checkudata() returned NULL");
ht = *pi;
}
/**
- * \brief Returns a host given its name.
+ * \brief Returns a host given its name. This is a lua function.
+ *
* \param L a Lua state
* \return number of values returned to Lua
*
* - Argument 1 (string): name of a host
- * - Return value (host): the corresponding host
+ * - Return value (host): the corresponding host will be pushed onto the stack
*/
static int l_host_get_by_name(lua_State * L)
{
const char *name = luaL_checkstring(L, 1);
- XBT_DEBUG("Getting Host from name...");
- msg_host_t msg_host = MSG_host_by_name(name);
- if (!msg_host) {
- XBT_ERROR("MSG_get_host_by_name failed, requested hostname: %s", name);
+ XBT_DEBUG("Getting host by name...");
+ sg_host_t host = sg_host_by_name(name);
+ if (!host) {
+ XBT_ERROR("sg_get_host_by_name failed, requested hostname: %s", name);
}
- lua_newtable(L); /* create a table, put the userdata on top of it */
- msg_host_t *lua_host = (msg_host_t *) lua_newuserdata(L, sizeof(msg_host_t));
- *lua_host = msg_host;
- luaL_getmetatable(L, HOST_MODULE_NAME);
- lua_setmetatable(L, -2);
- lua_setfield(L, -2, "__simgrid_host"); /* put the userdata as field of the table */
+ lua_newtable(L); /* table */
+ sg_host_t *lua_host = (sg_host_t *) lua_newuserdata(L, sizeof(sg_host_t));
+ /* table userdatum */
+ *lua_host = host;
+ luaL_getmetatable(L, HOST_MODULE_NAME); /* table userdatum metatable */
+ lua_setmetatable(L, -2); /* table userdatum */
+ lua_setfield(L, -2, HOST_FIELDNAME); /* table -- put the userdata as field of the table */
+
/* remove the args from the stack */
lua_remove(L, 1);
return 1;
*/
static int l_host_get_name(lua_State * L)
{
- msg_host_t ht = sglua_check_host(L, 1);
- lua_pushstring(L, MSG_host_get_name(ht));
+ sg_host_t ht = sglua_check_host(L, 1);
+ lua_pushstring(L, sg_host_get_name(ht));
return 1;
}
*/
static int l_host_number(lua_State * L)
{
- xbt_dynar_t hosts = MSG_hosts_as_dynar();
+ xbt_dynar_t hosts = sg_hosts_as_dynar();
lua_pushinteger(L, xbt_dynar_length(hosts));
xbt_dynar_free(&hosts);
return 1;
static int l_host_at(lua_State * L)
{
int index = luaL_checkinteger(L, 1);
- xbt_dynar_t hosts = MSG_hosts_as_dynar();
- msg_host_t host = xbt_dynar_get_as(hosts,index - 1,msg_host_t);// lua indexing start by 1 (lua[1] <=> C[0])
+ xbt_dynar_t hosts = sg_hosts_as_dynar();
+ sg_host_t host = xbt_dynar_get_as(hosts,index - 1,sg_host_t);// lua indexing start by 1 (lua[1] <=> C[0])
lua_newtable(L); /* create a table, put the userdata on top of it */
- msg_host_t *lua_host = (msg_host_t *) lua_newuserdata(L, sizeof(msg_host_t));
+ sg_host_t *lua_host = (sg_host_t *) lua_newuserdata(L, sizeof(sg_host_t));
*lua_host = host;
luaL_getmetatable(L, HOST_MODULE_NAME);
lua_setmetatable(L, -2);
- lua_setfield(L, -2, "__simgrid_host"); /* put the userdata as field of the table */
+ lua_setfield(L, -2, HOST_FIELDNAME); /* put the userdata as field of the table */
xbt_dynar_free(&hosts);
return 1;
}
*/
static int l_host_get_property_value(lua_State * L)
{
- msg_host_t ht = sglua_check_host(L, 1);
+ sg_host_t ht = sglua_check_host(L, 1);
const char *prop = luaL_checkstring(L, 2);
- lua_pushstring(L,MSG_host_get_property_value(ht,prop));
+ lua_pushstring(L, sg_host_get_property_value(ht,prop));
return 1;
}
*/
static int l_host_destroy(lua_State *L)
{
- //msg_host_t ht = sglua_check_host(L, 1);
+ //sg_host_t ht = sglua_check_host(L, 1);
//FIXME: not working..__MSG_host_priv_free(MSG_host_priv(ht));
return 0;
}