mirror/btstack
1
0
Fork 0
mirror of https://github.com/bluekitchen/btstack.git synced 2025-04-17 02:42:33 +00:00
Code Issues Packages Projects Releases Wiki Activity

improve on rfcomm credit bookkeeping

Browse Source
This commit is contained in:
matthias.ringwald 2011-06-16 22:39:43 +00:00
parent 490d3fd067
commit e48314d8d1
1 changed files with 39 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

59
src/rfcomm.c
View File

@ -1283,28 +1283,47 @@ int rfcomm_send_internal(uint8_t rfcomm_cid, uint8_t *data, uint16_t len){
}
rfcomm_channel_t * channel = rfcomm_channel_for_rfcomm_cid(rfcomm_cid);
int result = 0;
if (channel){
log_dbg("rfcomm_send_internal: ... outgoing credits %u\n", channel->credits_outgoing);
if (!channel->credits_outgoing){
log_err("rfcomm_send_internal cid %u, no rfcomm outgoing credits!\n", rfcomm_cid);
return -1;
}
channel->credits_outgoing--;
if (channel->packets_granted > 0){
--channel->packets_granted;
} else {
log_err("rfcomm_send_internal cid %u, no rfcomm credits granted!\n", rfcomm_cid);
}
if (channel->multiplexer->l2cap_credits){
channel->multiplexer->l2cap_credits--;
} else {
log_err("rfcomm_send_internal cid %u, no l2cap credits!\n", rfcomm_cid);
}
result = rfcomm_send_uih_data(channel->multiplexer, channel->dlci, data, len);
if (!channel){
log_err("rfcomm_send_internal cid %u doesn't exist!\n", rfcomm_cid);
return 0;
}
log_dbg("rfcomm_send_internal: ... outgoing credits %u\n", channel->credits_outgoing);
if (!channel->credits_outgoing){
log_err("rfcomm_send_internal cid %u, no rfcomm outgoing credits!\n", rfcomm_cid);
return -1;
}
// TODO: this code should be only executed after a successful send. However,
// if moving below rfcomm_send_uih_data Celeste stops working
// rfcomm_send_internally emits l2cap credits. by decrementing it first
// (and failing), we get a new credit
//
if (channel->multiplexer->l2cap_credits){
channel->multiplexer->l2cap_credits--;
} else {
log_err("rfcomm_send_internal cid %u, no l2cap credits!\n", rfcomm_cid);
}
//
result = rfcomm_send_uih_data(channel->multiplexer, channel->dlci, data, len);
if (result != 0) {
log_dbg("rfcomm_send_internal: error %d\n", result);
return result;
}
channel->credits_outgoing--;
if (channel->packets_granted > 0){
--channel->packets_granted;
} else {
log_err("rfcomm_send_internal cid %u, no rfcomm credits granted!\n", rfcomm_cid);
}
rfcomm_hand_out_credits();
return result;
}