anchao commented on pull request #4080:
URL: https://github.com/apache/incubator-nuttx/pull/4080#issuecomment-879787044
> i'm not sure what you mean here. can you explain a bit?
If we move the check outside the wrbuffer, we will duplicate a lot of
sem_post codes in these places. Do you want to do this? I don't think there is
any place like net/tcp/tcp_wrbuffer.c is more suitable.
```
net/tcp/tcp_send_buffered.c:214: tcp_wrbuffer_release((FAR struct
tcp_wrbuffer_s *)entry);
net/tcp/tcp_send_buffered.c:220: tcp_wrbuffer_release((FAR struct
tcp_wrbuffer_s *)entry);
net/tcp/tcp_send_buffered.c:434: tcp_wrbuffer_release(wrb);
net/tcp/tcp_send_buffered.c:607: tcp_wrbuffer_release(wrb);
net/tcp/tcp_send_buffered.c:672: tcp_wrbuffer_release(wrb);
net/tcp/tcp_send_buffered.c:1246: tcp_wrbuffer_release(wrb);
net/tcp/tcp_conn.c:741: tcp_wrbuffer_release(wrbuffer);
net/tcp/tcp_conn.c:747: tcp_wrbuffer_release(wrbuffer);
net/tcp/tcp_wrbuffer.c:157: tcp_wrbuffer_release(wrb);
net/tcp/tcp_wrbuffer.c:213: tcp_wrbuffer_release(wrb);
```
like this ?
net/tcp/tcp_wrbuffer.c:
```
tcp_wrbuffer_release(wrb);
#if CONFIG_NET_SEND_BUFSIZE > 0
if (conn)
{
int val = 0;
nxsem_get_value(&conn->snd_sem, &val);
if (val < 0)
{
nxsem_post(&conn->snd_sem);
}
}
#endif
```
net/tcp/tcp_conn.c:
```
tcp_wrbuffer_release(wrb);
#if CONFIG_NET_SEND_BUFSIZE > 0
if (conn)
{
int val = 0;
nxsem_get_value(&conn->snd_sem, &val);
if (val < 0)
{
nxsem_post(&conn->snd_sem);
}
}
#endif
```
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