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extmod/modlwip: lwip_tcp_send(): Common subexpression elimination, use MIN().

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This commit is contained in:
Paul Sokolovsky 2015-10-27 01:26:05 +03:00
parent 76217064ac
commit fa87e90cfa
1 changed files with 6 additions and 5 deletions
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11
extmod/modlwip.c
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@ -353,18 +353,19 @@ STATIC mp_uint_t lwip_udp_receive(lwip_socket_obj_t *socket, byte *buf, mp_uint_
}
// Helper function for send/sendto to handle TCP packets
STATIC mp_uint_t lwip_tcp_send(lwip_socket_obj_t *socket, const byte *buf, mp_uint_t
len, int *_errno) {
u16_t available = tcp_sndbuf((struct tcp_pcb *)socket->pcb);
STATIC mp_uint_t lwip_tcp_send(lwip_socket_obj_t *socket, const byte *buf, mp_uint_t len, int *_errno) {
struct tcp_pcb *pcb = (struct tcp_pcb *)socket->pcb;
u16_t available = tcp_sndbuf(pcb);
u16_t write_len = MIN(available, len);
err_t err = tcp_write((struct tcp_pcb *)socket->pcb, buf, (available > len ? len : available), TCP_WRITE_FLAG_COPY);
err_t err = tcp_write(pcb, buf, write_len, TCP_WRITE_FLAG_COPY);
if (err != ERR_OK) {
*_errno = error_lookup_table[-err];
return -1;
}
return available > len ? len : available;
return write_len;
}
// Helper function for recv/recvfrom to handle TCP packets