lwIP  2.1.0
Lightweight IP stack
tcpip_priv.h File Reference
#include "lwip/opt.h"
#include "lwip/tcpip.h"
#include "lwip/sys.h"
#include "lwip/timeouts.h"

Functions

err_t tcpip_send_msg_wait_sem (tcpip_callback_fn fn, void *apimsg, sys_sem_t *sem)
 
err_t tcpip_api_call (tcpip_api_call_fn fn, struct tcpip_api_call_data *call)
 

Detailed Description

TCPIP API internal implementations (do not use in application code)

Function Documentation

◆ tcpip_api_call()

err_t tcpip_api_call ( tcpip_api_call_fn  fn,
struct tcpip_api_call_data *  call 
)

Synchronously calls function in TCPIP thread and waits for its completion. It is recommended to use LWIP_TCPIP_CORE_LOCKING (preferred) or LWIP_NETCONN_SEM_PER_THREAD. If not, a semaphore is created and destroyed on every call which is usually an expensive/slow operation.

Parameters
fnFunction to call
callCall parameters
Returns
Return value from tcpip_api_call_fn

◆ tcpip_send_msg_wait_sem()

err_t tcpip_send_msg_wait_sem ( tcpip_callback_fn  fn,
void *  apimsg,
sys_sem_t *  sem 
)

Sends a message to TCPIP thread to call a function. Caller thread blocks on on a provided semaphore, which ist NOT automatically signalled by TCPIP thread, this has to be done by the user. It is recommended to use LWIP_TCPIP_CORE_LOCKING since this is the way with least runtime overhead.

Parameters
fnfunction to be called from TCPIP thread
apimsgargument to API function
semsemaphore to wait on
Returns
ERR_OK if the function was called, another err_t if not