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#include <std.h>
#include "stm32f4xx_hal.h"
#include "mpconfig.h"
#include "nlr.h"
#include "misc.h"
#include "qstr.h"
#include "obj.h"
#include "objtuple.h"
#include "runtime.h"
#include "portmodules.h"
#include "hci.h"
#include "socket.h"
#include "netapp.h"
#define MP_ASSERT_TYPE(obj, type) \
do { \
__typeof__ (obj) _a = (obj); \
__typeof__ (type) _b = (type); \
if (!MP_OBJ_IS_TYPE(_a, _b)) { \
nlr_jump(mp_obj_new_exception_msg_varg( \
&mp_type_TypeError, \
"can't convert %s to %s", \
mp_obj_get_type_str(_a), \
_b->name)); \
} \
} while(0)
// select helper functions
STATIC void set_fds(int *nfds, mp_obj_t *fdlist, uint fdlist_len, fd_set *fdset) {
// clear fd set
FD_ZERO(fdset);
// add sockets to fd set
for (int i=0; i<fdlist_len; i++) {
socket_t *s = fdlist[i];
// check arg type
MP_ASSERT_TYPE(s, &socket_type);
// add to fd set
FD_SET(s->fd, fdset);
if (s->fd > (*nfds)) {
*nfds = s->fd;
}
}
}
STATIC void get_fds(mp_obj_t *fdlist, uint fdlist_len, mp_obj_t *fdlist_out, fd_set *fdset) {
for (int i=0; i<fdlist_len; i++) {
socket_t *s = fdlist[i];
if (FD_ISSET(s->fd, fdset)) {
socket_t *socket_obj = m_new_obj_with_finaliser(socket_t);
socket_obj->base.type = (mp_obj_t)&socket_type;
socket_obj->fd = s->fd;
mp_obj_list_append(fdlist_out, socket_obj);
}
}
}
STATIC mp_obj_t mod_select_select(uint n_args, const mp_obj_t *args) {
int nfds=0; //highest-numbered fd plus 1
timeval tv={0};
fd_set rfds, wfds, xfds;
mp_obj_t *rlist, *wlist, *xlist;
uint rlist_len, wlist_len, xlist_len;
// read args
mp_obj_get_array(args[0], &rlist_len, &rlist);
mp_obj_get_array(args[1], &wlist_len, &wlist);
mp_obj_get_array(args[2], &xlist_len, &xlist);
if (n_args == 4) {
float timeout = mp_obj_get_float(args[3]);
tv.tv_sec = (int)timeout;
tv.tv_usec = (timeout-(int)timeout)*1000*1000;
}
// add fds to their respective sets
set_fds(&nfds, rlist, rlist_len, &rfds);
set_fds(&nfds, wlist, wlist_len, &wfds);
set_fds(&nfds, xlist, xlist_len, &xfds);
// call select
nfds = select(nfds+1, &rfds, &wfds, &xfds, &tv);
// if any of the read sockets is closed, we add it to the read fd set,
// a subsequent call to recv() returns 0. This behavior is consistent with BSD.
for (int i=0; i<rlist_len; i++) {
socket_t *s = rlist[i];
if (mod_wlan_get_fd_state(s->fd)) {
FD_SET(s->fd, &rfds);
nfds = (nfds > s->fd)? nfds:s->fd;
}
}
// return value; a tuple of 3 lists
mp_obj_t fds[3] = {
mp_obj_new_list(0, NULL),
mp_obj_new_list(0, NULL),
mp_obj_new_list(0, NULL)
};
// On success, select() returns the number of file descriptors contained
// in the three returned descriptor sets which may be zero if the timeout
// expires before anything interesting happens, -1 is returned on error.
if (nfds == -1) { // select failed
nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, "select failed"));
} else if (nfds) { // an fd is ready
get_fds(rlist, rlist_len, fds[0], &rfds);
get_fds(wlist, wlist_len, fds[1], &wfds);
get_fds(xlist, xlist_len, fds[2], &xfds);
} // select timedout
return mp_obj_new_tuple(3, fds);
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mod_select_select_obj, 3, 4, mod_select_select);
STATIC const mp_map_elem_t select_module_globals_table[] = {
{ MP_OBJ_NEW_QSTR(MP_QSTR___name__), MP_OBJ_NEW_QSTR(MP_QSTR_select) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_select), (mp_obj_t)&mod_select_select_obj },
};
STATIC const mp_obj_dict_t select_module_globals = {
.base = {&mp_type_dict},
.map = {
.all_keys_are_qstrs = 1,
.table_is_fixed_array = 1,
.used = MP_ARRAY_SIZE(select_module_globals_table),
.alloc = MP_ARRAY_SIZE(select_module_globals_table),
.table = (mp_map_elem_t*)select_module_globals_table,
},
};
const mp_obj_module_t select_module = {
.base = { &mp_type_module },
.name = MP_QSTR_select,
.globals = (mp_obj_dict_t*)&select_module_globals,
};
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