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extmod/modlwip: tcp_recv: Use more regular and responsive poll pattern. 

Polling once in 100ms means dismal performance.

TODO: Propagate this pattern to other polling places.
This commit is contained in:
Paul Sokolovsky 2015-12-29 20:35:41 +02:00
parent 0dce9a21ce
commit a63d4a6cc2
1 changed files with 9 additions and 10 deletions
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19
extmod/modlwip.c
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@ -203,6 +203,11 @@ typedef struct _lwip_socket_obj_t {
int8_t connected;
} lwip_socket_obj_t;
static inline void poll_sockets(void) {
// TODO: Allow to override by ports
mp_hal_delay_ms(1);
}
/*******************************************************************************/
// Callback functions for the lwIP raw API.
@ -378,19 +383,13 @@ STATIC mp_uint_t lwip_tcp_receive(lwip_socket_obj_t *socket, byte *buf, mp_uint_
}
if (socket->incoming.pbuf == NULL) {
if (socket->timeout != -1) {
for (mp_uint_t retries = socket->timeout / 100; retries--;) {
mp_hal_delay_ms(100);
if (socket->incoming.pbuf != NULL) break;
}
if (socket->incoming.pbuf == NULL) {
mp_uint_t start = mp_hal_ticks_ms();
while (socket->incoming.pbuf == NULL) {
if (socket->timeout != -1 && mp_hal_ticks_ms() - start > socket->timeout) {
*_errno = ETIMEDOUT;
return -1;
}
} else {
while (socket->incoming.pbuf == NULL) {
mp_hal_delay_ms(100);
}
poll_sockets();
}
}