touch fish 33
写文件时进程宕机，数据会丢失吗？
memory profiling
另外这个老哥的blog感觉有点意思
udp send之前到底要不要bind
看下来是不推荐的，实际上sento之后就会给你绑定到本地的port了
另外linux的看下来，是有autobind的, 这个吊代码在linx-0.11就大概是这种逻辑了
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int inet_sendmsg(struct socket *sock, struct msghdr *msg, size_t size)
{
struct sock *sk = sock->sk;
if (unlikely(inet_send_prepare(sk)))
return -EAGAIN;
return INDIRECT_CALL_2(sk->sk_prot->sendmsg, tcp_sendmsg, udp_sendmsg,
sk, msg, size);
}
EXPORT_SYMBOL(inet_sendmsg);
int inet_send_prepare(struct sock *sk)
{
sock_rps_record_flow(sk);
/* We may need to bind the socket. */
if (data_race(!inet_sk(sk)->inet_num) && !sk->sk_prot->no_autobind &&
inet_autobind(sk))
return -EAGAIN;
return 0;
}
EXPORT_SYMBOL_GPL(inet_send_prepare);
/*
* Automatically bind an unbound socket.
*/
static int inet_autobind(struct sock *sk)
{
struct inet_sock *inet;
/* We may need to bind the socket. */
lock_sock(sk);
inet = inet_sk(sk);
if (!inet->inet_num) {
if (sk->sk_prot->get_port(sk, 0)) {
release_sock(sk);
return -EAGAIN;
}
inet->inet_sport = htons(inet->inet_num);
}
release_sock(sk);
return 0;
}
android怎么看linux kernel版本
1
adb shell cat /proc/version
再探clickhouse的memcpy
之前发过的，我不记得那个lib的memcpy也换成类似这样了
shared_ptr异步析构
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