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Make sure the closed slot is always freed (#68)

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* Tidy up and fix some edge cases.

* Make sure we always release a closed_slot.
This commit is contained in:
matt123p
2019-10-14 20:38:04 +01:00
committed by Me No Dev
parent d27a12ace6
commit cacac8f871
2 changed files with 30 additions and 16 deletions
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44
src/AsyncTCP.cpp
View File

@@ -82,8 +82,8 @@ static TaskHandle_t _async_service_task_handle = NULL;
SemaphoreHandle_t _slots_lock;
const int _number_of_closed_slots = CONFIG_LWIP_MAX_ACTIVE_TCP;
static int _closed_slots[_number_of_closed_slots];
static int _closed_index = []() {
static uint32_t _closed_slots[_number_of_closed_slots];
static uint32_t _closed_index = []() {
_slots_lock = xSemaphoreCreateBinary();
xSemaphoreGive(_slots_lock);
for (int i = 0; i < _number_of_closed_slots; ++ i) {
@@ -565,17 +565,7 @@ AsyncClient::AsyncClient(tcp_pcb* pcb)
_pcb = pcb;
_closed_slot = -1;
if(_pcb){
xSemaphoreTake(_slots_lock, portMAX_DELAY);
int closed_slot_min_index = 0;
for (int i = 0; i < _number_of_closed_slots; ++ i) {
if ((_closed_slot == -1 || _closed_slots[i] <= closed_slot_min_index) && _closed_slots[i] != 0) {
closed_slot_min_index = _closed_slots[i];
_closed_slot = i;
}
}
_closed_slots[_closed_slot] = 0;
xSemaphoreGive(_slots_lock);
_allocate_closed_slot();
_rx_last_packet = millis();
tcp_arg(_pcb, this);
tcp_recv(_pcb, &_tcp_recv);
@@ -589,6 +579,7 @@ AsyncClient::~AsyncClient(){
if(_pcb) {
_close();
}
_free_closed_slot();
}
/*
@@ -714,7 +705,6 @@ bool AsyncClient::connect(const char* host, uint16_t port){
ip_addr_t addr;
if(!_start_async_task()){
Serial.println("failed to start task");
log_e("failed to start task");
return false;
}
@@ -825,6 +815,29 @@ int8_t AsyncClient::_close(){
return err;
}
void AsyncClient::_allocate_closed_slot(){
xSemaphoreTake(_slots_lock, portMAX_DELAY);
uint32_t closed_slot_min_index = 0;
for (int i = 0; i < _number_of_closed_slots; ++ i) {
if ((_closed_slot == -1 || _closed_slots[i] <= closed_slot_min_index) && _closed_slots[i] != 0) {
closed_slot_min_index = _closed_slots[i];
_closed_slot = i;
}
}
if (_closed_slot != -1) {
_closed_slots[_closed_slot] = 0;
}
xSemaphoreGive(_slots_lock);
}
void AsyncClient::_free_closed_slot(){
if (_closed_slot != -1) {
_closed_slots[_closed_slot] = _closed_index;
_closed_slot = -1;
++ _closed_index;
}
}
/*
* Private Callbacks
* */
@@ -879,8 +892,7 @@ int8_t AsyncClient::_lwip_fin(tcp_pcb* pcb, int8_t err) {
if(tcp_close(_pcb) != ERR_OK) {
tcp_abort(_pcb);
}
_closed_slots[_closed_slot] = _closed_index;
++ _closed_index;
_free_closed_slot();
_pcb = NULL;
return ERR_OK;
}

2
src/AsyncTCP.h
View File

@@ -170,6 +170,8 @@ class AsyncClient {
uint16_t _connect_port;
int8_t _close();
void _free_closed_slot();
void _allocate_closed_slot();
int8_t _connected(void* pcb, int8_t err);
void _error(int8_t err);
int8_t _poll(tcp_pcb* pcb);