ipc

I've got a Perl script that starts a background job to print some logging information into a file, executes something, and then finishes. I would like to end the background process when the script is done, but as far as I know, if I use a double fork as below, then waitpid($pid,0) will wait for the background process to finish, instead of killing it, and kill(9,$pid) won't get rid of the background process. Example script: #!/usr/bin/perl use strict; # Do a first general top my $ret = `top -b -n 1 > logfile`; # Do a background $USER top every minute my $cmd = "top -b -d 60 -n 300 -u $ENV{USER}

Is there any way to directly communicate with a WallpaperService from an Activity ? It doesn't look like I can use the normal service communication classes because the onBind method is declared final in the WallpaperService class I'm extending. Worth noting that I'm referring to my WallpaperService not any . Any workarounds if this isn't possible? My solution was to use local sockets. I created an instance of a LocalServerSocket in the constructor of my wallpaper's Engine . Here's a quick implementation. Server runs on a separate thread and is directly tied to the lifecycle of MyEngine . The

I am working on a multithreaded number crunching app, let's call it myprogram . I plan to run myprogram on IBM's LSF grid. LSF allows a job to scheduled on CPUs from different machines. For example, bsub -n 3 ... myprogram ... can allocate two CPUs from node1 and one CPU from node2. I know that I can ask LSF to allocate all 3 cores in the same node, but I am interested in the case where my job is scheduled onto different nodes. How does LSF manage this? Will myprogram be run in two different processes in node1 and node2? Does LSF automatically manage data transfer between node1 and node2?

1，管道,FIFO 2, 信号 3，消息队列 4，共享类存 5.文件映射 6.socket （ 1 ）管道（Pipe）：管道可用于具有亲缘关系进程间的通信，允许一个进程和另一个与它有共同祖先的进程之间进行通信。 　　（ 2 ）命名管道（named pipe）：命名管道克服了管道没有名字的限制，因此，除具有管道所具有的功能外，它还允许无亲缘关系进程间的通信。命名管道在文件系统中有对应的文件名。命名管道通过命令mkfifo或系统调用mkfifo来创建。 　　（ 3 ）信号（Signal）：信号是比较复杂的通信方式，用于通知接受进程有某种事件发生，除了用于进程间通信外，进程还可以发送信号给进程本身；linux除了支持Unix早期信号语义函数sigal外，还支持语义符合Posix.1标准的信号函数sigaction（实际上，该函数是基于BSD的，BSD为了实现可靠信号机制，又能够统一对外接口，用sigaction函数重新实现了signal函数）。 　　（ 4 ）消息（Message）队列：消息队列是消息的链接表，包括Posix消息队列system V消息队列。有足够权限的进程可以向队列中添加消息，被赋予读权限的进程则可以读走队列中的消息。消息队列克服了信号承载信息量少，管道只能承载无格式字节流以及缓冲区大小受限等缺 　　（ 5 ）共享内存：使得多个进程可以访问同一块内存空间

After lot of googeling, I could not find any way to pass a object from one application to other application.Though I know that we can pass object from one activty to other activity using Parcel but how to do this between applications? My object is this public class MyObject { private String name; public String getName() { return this.name; } public void setName(String name) { this.name=name; } } Then how to do this like we do for passing object between activities intent.putExtra("key",new MyOject()); I'm assuming you're in charge of both applications. Which of these situations is true? Both