/**
* \brief Returns the number of existing hosts.
* \param L a Lua state
* \return number of values returned to Lua
*
* - Return value (number): number of hosts
*/
static int l_host_number(lua_State * L)
{
xbt_dynar_t hosts = sg_hosts_as_dynar();
lua_pushinteger(L, xbt_dynar_length(hosts));
xbt_dynar_free(&hosts);
return 1;
}
/**
* \brief Returns the workstation list
*
* Use SD_workstation_get_number() to know the array size.
*
* \return an array of \ref SD_workstation_t containing all workstations
* \remark The workstation order in the returned array is generally different from the workstation creation/declaration order in the XML platform (we use a hash table internally).
* \see SD_workstation_get_number()
*/
const SD_workstation_t *SD_workstation_get_list(void) {
xbt_assert(SD_workstation_get_number() > 0, "There is no workstation!");
if (sd_global->workstation_list == NULL) /* this is the first time the function is called */
sd_global->workstation_list = xbt_dynar_to_array(sg_hosts_as_dynar());
return sd_global->workstation_list;
}
/**
* \brief Returns the host given its index.
* \param L a Lua state
* \return number of values returned to Lua
*
* - Argument 1 (number): an index (1 is the first)
* - Return value (host): the host at this index
*/
static int l_host_at(lua_State * L)
{
int index = luaL_checkinteger(L, 1);
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 */
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, HOST_FIELDNAME); /* put the userdata as field of the table */
xbt_dynar_free(&hosts);
return 1;
}
/** @brief Returns the host list
*
* Uses sg_host_count() to know the array size.
*
* \return an array of \ref sg_host_t containing all the hosts in the platform.
* \remark The host order in this array is generally different from the
* creation/declaration order in the XML platform (we use a hash table
* internally).
* \see sg_host_count()
*/
sg_host_t *sg_host_list(void) {
xbt_assert(sg_host_count() > 0, "There is no host!");
return (sg_host_t*)xbt_dynar_to_array(sg_hosts_as_dynar());
}
/** \ingroup m_host_management
* \brief Return a dynar containing all the hosts declared at a given point of time
* \remark The host order in the returned array is generally different from the host creation/declaration order in the XML platform (we use a hash table internally)
*/
xbt_dynar_t MSG_hosts_as_dynar(void) {
return sg_hosts_as_dynar();
}