本文整理汇总了C++中asio::io_service::notify_fork方法的典型用法代码示例。如果您正苦于以下问题：C++ io_service::notify_fork方法的具体用法？C++ io_service::notify_fork怎么用？C++ io_service::notify_fork使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类asio::io_service的用法示例。
在下文中一共展示了io_service::notify_fork方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: fcntl
Wondruss::auth_slave::auth_slave(asio::io_service& io_service, Lobby* lobby)
: service_slave(io_service, lobby)
{
asio::local::stream_protocol::socket child_fdsock(io_service);
asio::local::stream_protocol::socket child_rdsock(io_service);
asio::local::stream_protocol::socket child_wrsock(io_service);
asio::local::connect_pair(fdsock, child_fdsock);
asio::local::connect_pair(rdsock, child_wrsock);
asio::local::connect_pair(wrsock, child_rdsock);
fcntl(fdsock.native(), F_SETFD, FD_CLOEXEC);
fcntl(rdsock.native(), F_SETFD, FD_CLOEXEC);
fcntl(wrsock.native(), F_SETFD, FD_CLOEXEC);
io_service.notify_fork(asio::io_service::fork_prepare);
pid_t newpid = fork();
if (newpid == 0) {
io_service.notify_fork(asio::io_service::fork_child);
if(FD_SOCKETS != dup2(child_fdsock.native(), FD_SOCKETS)) {
child_fdsock.send(asio::buffer("KO", 0));
exit(0);
}
if(FD_LBY_TO_SLV != dup2(child_rdsock.native(), FD_LBY_TO_SLV)) {
child_fdsock.send(asio::buffer("KO", 0));
exit(0);
}
if(FD_SLV_TO_LBY != dup2(child_wrsock.native(), FD_SLV_TO_LBY)) {
child_fdsock.send(asio::buffer("KO", 0));
exit(0);
}
// TODO: find wondruss_auth a bit more sanely
execl("./wondruss_auth", "wondruss_auth", nullptr);
// if we get here, execl failed for some reason. Let's tell the lobby we failed.
child_fdsock.send(asio::buffer("KO", 0));
exit(0);
}
io_service.notify_fork(asio::io_service::fork_parent);
char buf[3] = {0};
fdsock.receive(asio::buffer(buf, 2)); //TODO: timeout
if(strcmp(buf, "OK") != 0) {
LOG_FATAL("Auth process gave us a bad startup msg. WTF?");
// TODO: fail spectacularly
} else {
LOG_INFO("Auth startup OK! continuing...");
}
rdsock.async_receive(asio::null_buffers(), std::bind(std::mem_fn(&auth_slave::handle_slave_msg), this, std::placeholders::_1));
}