APM模式采用选项(2)。为此,IAsyncResult接口公开了两个相关但不同的成员:IsCompleted和CompletedSynchronously。IsCompleted告诉你操作是否已完成:你可以多次检查它,并最终将其从false转换为true,然后保持在那里。相比之下,CompletedSynchronously从不改变(或者如果它改变了,那么它就是一个等待发生的严重bug);它用于在Begin方...
...if(!open_write &&is_queued()) { center->create_file_event(cs.fd(), EVENT_WRITABLE, write_handler); open_write =true; }if(open_write && !is_queued()) { center->delete_file_event(cs.fd(), EVENT_WRITABLE); open_write =false;if(state_after_send != STATE_NONE) center->dispat...
为此,IAsyncResult接口公开了两个相关但不同的成员:IsCompleted和CompletedSynchronously。 IsCompleted表示操作是否已完成,随着时间推移,它会从false变为true。 CompletedSynchronously永远不会改变(如果改变了,那是潜在的严重错误)。它用于在调用Begin方法的调用方和AsyncCallback之间传递信息,确定谁应该负责执行后续工作。 如...
{try{boost::asio::io_contextio_context(1);boost::asio::signal_setsignals(io_context,SIGINT,SIGTERM);signals.async_wait([&](auto,auto){io_context.stop();});co_spawn(io_context,listener(),detached);io_context.run();}catch(std::exception&e){std::printf("Exception: %s\n",e.what()...
IsCompleted告诉你操作是否已经完成:你可以多次检查它,最终它会从false转换为true,然后保持不变。相比之下,CompletedSynchronously永远不会改变(如果改变了,那就是一个令人讨厌的bug);它用于Begin方法的调用者和AsyncCallback之间的通信,他们中的一个负责执行任何延续工作。如果CompletedSynchronously为false,则操作是异步...
.rd_en(rd_en), // 1-bit input: Read Enable: If the FIFO is not empty, asserting this // signal causes data (on dout) to be read from the FIFO. Must be held // active-low when rd_rst_busy is active high. .rst(rst), // 1-bit input: Reset: Must be synchronous to wr_clk...
// signal causes data (on dout) to be read from the FIFO. Must be held // active-low when rd_rst_busy is active high. .rst(rst), // 1-bit input: Reset: Must be synchronous to wr_clk. The clock(s) can be // unstable at the time of applying reset, but reset must be relea...
When C# resolves the Task, we need to signal the host that the pollable was resolved and pass the string which was the promised payload. Ah, I see what you're saying. For WASIp2, there's no concept of guest-created pollables, so we can't actually return a Task, pollable, or ...
if (packet.type == ZX_PKT_TYPE_SIGNAL_ONE && packet.signal.observed & ZX_TIMER_SIGNALED) { return async_loop_dispatch_tasks(loop); } } else { // packet.key > 0 // Handle wait completion packets. if (packet.type == ZX_PKT_TYPE_SIGNAL_ONE) { async_wait_t* wait = (void*)(uin...
bool IsCompleted { get; } bool CompletedSynchronously { get; } } public delegate void AsyncCallback(IAsyncResult ar); } 这个IAsyncResult实例随后会从Begin方法返回,并在最终调用回调时传递给AsyncCallback。当需要消费操作结果时,调用者会将该IAsyncResult实例传递给End方法,End方法负责确保操作完成(如果未完成,...