我正在涉足关于 boost::asio 的协程,并且我对异常处理感到困惑。从文档中的示例来看,看起来任何“失败”都会变成异常 - 所以我希望假设抛出的任何异常也会传播回调用。但情况似乎并非如此:error_codeco_spawn #defineBOOST_ASIO_HAS_CO_AWAIT#defineBOOST_ASIO_HAS_STD_COROUTINE#include<iostream>#include<boost/asio...
asio包含errorcode参数的函数,不会抛出异常 可以尝试connect之后,判断错误码, boost::asio::error::...
将boost::asio::awaitable转换为std::future可以通过使用boost::asio::co_spawn和boost::asio::use_future来实现。boost::asio::co_spawn是一个协程函数,它接受一个可等待对象(如boost::asio::awaitable)并返回一个std::future对象。 下面是一个示例代码,演示了如何将boost::asio::awaitable...
2 co_spawn表示启动一个协程,参数分别为调度器,执行的函数,以及启动方式, 比如我们启动了一个协程,deatched表示将协程对象分离出来,这种启动方式可以启动多个协程,他们都是独立的,如何调度取决于调度器,在用户的感知上更像是线程调度的模式,类似于并发运行,其实底层都是串行的。 co_spawn(io_context,listener()...
下面的co_spawn才是协程重点。listener是一个协程,从语义上说这行代码就是以分离方式启动listener协程,没了。 detach的写法跟std::thread很像,估计是统一style。detach还带有nothrow的含义,即该协程抛出异常的话主线程会无视 三、监听sock连接 for循环之前是固定写法。
get_executor(); boost::asio::co_spawn(io_ex, [&]() -> boost::asio::awaitable<void> { auto switch_strand = boost::asio::make_strand(io_ex); co_await boost::asio::post(switch_strand, boost::asio::use_awaitable); assert(switch_strand == co_await boost::asio::this_coro::...
boost::asio::co_spawn(io_context, ws, boost::asio::detached); io_context.run(); 1. 2. 其中ws的签名为boost::asio::awaitable<void> ws() 建立tcp链接(以下步骤皆位于ws函数中) 这一步可以分为两个步骤,解析dns以及建立tcp链接。 auto executor = co_await boost::asio::this_coro::executor;...
using boost::asio::co_spawn; using boost::asio::detached; using boost::asio::use_awaitable; using boost::asio::ip::tcp; namespace this_coro = boost::asio::this_coro; constexpr int32_t kHeadLen = 4; constexpr int32_t kMaxBodyLen = 1024 * 1024; ...
#include<boost/redis/connection.hpp>#include<boost/asio/detached.hpp>#include<boost/asio/co_spawn.hpp>#include<boost/asio/redirect_error.hpp>#include<boost/asio/steady_timer.hpp>#include<iostream>#include<chrono>namespaceasio=boost::asio;usingboost::redis::request;usingboost::redis::ignore;using...
fix early destruction issue of using co_spawn to start session 76c7039 build binary from the latest source fea1931 Contributor Author jyyi1 commented Nov 2, 2022 Let me know when to take another look Just tested on Ubuntu 20, it worked as expected. There is still some space for im...