multithreading

问题 I'm coming back to programming after having done none for several years, and created a Sudoku game to get my feet wet again. I've written a recursive function to brute-force a solution, and it will do so for simple board states, but runs into a stack overflow most of the time for more complicated board states. I know that this could be averted using loops or a more efficient algorithm, but since this is for the sake of learning I want to know how to allocate more memory to the stack

问题 I'm coming back to programming after having done none for several years, and created a Sudoku game to get my feet wet again. I've written a recursive function to brute-force a solution, and it will do so for simple board states, but runs into a stack overflow most of the time for more complicated board states. I know that this could be averted using loops or a more efficient algorithm, but since this is for the sake of learning I want to know how to allocate more memory to the stack

问题 Answering this question made me think about something is still not clear for me. Let's first assume we read all from this post and this post. [begin edit] Maybe it's not so obvious (Italian humor?!) but title is just pretty provocative : of course there should be a reason if volatile has been included in C#, I just can't understand exact one. [end edit] In short we know we have three tools to share a variable between threads: lock because this will prevent instruction reordering. volatile

问题 While debugging my Python 3.5 pogram in Pycharm 5.0.4, I am trying to hit the pause button to find how why/where the program is hanging (as can be done in Visual Studio). However, nothing happens: the pause button does not become grey and the resume button stays grey, and in the debugger tool window, "Frames are not available". I tried with different basic programs, on Linux and on Windows, to no avail. Is this a bug or am I missing something in how Pycharm debugging is supposed to work? I

问题 I am working on making a game with libGDX and I really want to thread the game so I am running a paint loop and a logic loop on separate threads much like you would making a simple java swing game with the paintcomponent loop and the runnable run loop. I am experienced with threading in c but not so much in java. The only way I was able to make a thread was by making a class that extends threads and then creating the run loop in there. But the point of making the run loop was to allow each

问题 I have a C++ pipe server app and a C# pipe client app communicating via Windows named pipe (duplex, message mode, wait/blocking in separate read thread). It all works fine (both sending and receiving data via the pipe) until I try and write to the pipe from the client in response to a forms 'textchanged' event. When I do this, the client hangs on the pipe write call (or flush call if autoflush is off). Breaking into the server app reveals it's also waiting on the pipe ReadFile call and not

问题 I have a C++ pipe server app and a C# pipe client app communicating via Windows named pipe (duplex, message mode, wait/blocking in separate read thread). It all works fine (both sending and receiving data via the pipe) until I try and write to the pipe from the client in response to a forms 'textchanged' event. When I do this, the client hangs on the pipe write call (or flush call if autoflush is off). Breaking into the server app reveals it's also waiting on the pipe ReadFile call and not

问题 I have recently learned Joshua Bloch's builder pattern for creating objects with many optional fields. I've been using something like it for years, but never used an inner-class until Bloch's book suggested it to me. I love it. I understand that another thread may alter the bulider's configuration, before it's actually built (with build() ), such that it may be necessary to re-validate all values in the constructor of the enclosing class. Below is an example of a builder class that optionally

问题 I have recently learned Joshua Bloch's builder pattern for creating objects with many optional fields. I've been using something like it for years, but never used an inner-class until Bloch's book suggested it to me. I love it. I understand that another thread may alter the bulider's configuration, before it's actually built (with build() ), such that it may be necessary to re-validate all values in the constructor of the enclosing class. Below is an example of a builder class that optionally

问题 I am a newb, and I have read about Garbage Collection from the first two answers here. Now justifying the use of Immutable Objects even if the programmer has to create new objects, as compared to using existing objects (in multi-threaded applications), this tutorial says that the cost of object creation is made up for by the decrease in memory overhead due to garbage collection , and the elimination of code to protect mutable objects from threads interference and memory consistency errors: