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tcpip.c: Implement an easier way for TCPIP API calls - client code does not have to deal with semaphores and core locking any more

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This commit is contained in:
Dirk Ziegelmeier 2016-03-08 21:26:29 +01:00
parent 5e472badf1
commit 8106413644
2 changed files with 51 additions and 0 deletions
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37
src/api/tcpip.c
View File

@ -103,6 +103,11 @@ tcpip_thread(void *arg)
LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: API message %p\n", (void *)msg));
msg->msg.api.function(msg->msg.api.msg);
break;
case TCPIP_MSG_API_CALL:
LWIP_DEBUGF(TCPIP_DEBUG, ("tcpip_thread: API CALL message %p\n", (void *)msg));
msg->msg.api_call->err = msg->msg.api_call->function(msg->msg.api_call);
sys_sem_signal(&msg->msg.api_call->sem);
break;
#endif /* LWIP_TCPIP_CORE_LOCKING */
#if !LWIP_TCPIP_CORE_LOCKING_INPUT
@ -331,6 +336,38 @@ tcpip_send_api_msg(tcpip_callback_fn fn, void *apimsg, sys_sem_t* sem)
}
#endif /* !LWIP_TCPIP_CORE_LOCKING */
err_t tcpip_api_call(tcpip_api_call_fn fn, struct tcpip_api_call *call)
{
#if LWIP_TCPIP_CORE_LOCKING
LOCK_TCPIP_CORE();
call->err = fn(call);
UNLOCK_TCPIP_CORE();
return call->err;
#else
if (sys_mbox_valid_val(mbox)) {
TCPIP_MSG_VAR_DECLARE(msg);
err_t err;
err = sys_sem_new(&call->sem, 0);
if (err != ERR_OK) {
return err;
}
TCPIP_MSG_VAR_ALLOC(msg);
TCPIP_MSG_VAR_REF(msg).type = TCPIP_MSG_API_CALL;
TCPIP_MSG_VAR_REF(msg).msg.api_call = call;
TCPIP_MSG_VAR_REF(msg).msg.api_call->function = fn;
sys_mbox_post(&mbox, &TCPIP_MSG_VAR_REF(msg));
sys_arch_sem_wait(&call->sem, 0);
sys_sem_free(&call->sem);
TCPIP_MSG_VAR_FREE(msg);
return ERR_OK;
}
return ERR_VAL;
#endif
}
/**
* Allocate a structure for a static callback message and initialize it.
* This is intended to be used to send "static" messages from interrupt context.

14
src/include/lwip/priv/tcpip_priv.h
View File

@ -99,8 +99,21 @@ extern sys_mutex_t lock_tcpip_core;
err_t tcpip_send_api_msg(tcpip_callback_fn fn, void *apimsg, sys_sem_t* sem);
#endif /* !LWIP_TCPIP_CORE_LOCKING */
struct tcpip_api_call;
typedef err_t (*tcpip_api_call_fn)(struct tcpip_api_call* call);
struct tcpip_api_call
{
tcpip_api_call_fn function;
#if !LWIP_TCPIP_CORE_LOCKING
sys_sem_t sem;
#endif /* !LWIP_TCPIP_CORE_LOCKING */
err_t err;
};
err_t tcpip_api_call(tcpip_api_call_fn fn, struct tcpip_api_call *call);
enum tcpip_msg_type {
TCPIP_MSG_API,
TCPIP_MSG_API_CALL,
TCPIP_MSG_INPKT,
#if LWIP_TCPIP_TIMEOUT
TCPIP_MSG_TIMEOUT,
@ -117,6 +130,7 @@ struct tcpip_msg {
tcpip_callback_fn function;
void* msg;
} api;
struct tcpip_api_call *api_call;
struct {
struct pbuf *p;
struct netif *netif;