我可以让pthread_t实例超出范围吗？(Can I let pthread_t instance go out of scope?)
我用C和pthreads编程。 我有一个长期运行的函数，我想在一个单独的线程中运行：
void long_running_function(void * arg) { ... } void start_long_running_function(void * arg) { pthread_t thread; pthread_create( &thread , NULL , long_running_function , arg); /* What about the thread variable? */ }离开start_long_running_function（）函数时，局部变量'thread'将超出范围。 这样可以 - 或者我可以冒险解决问题，例如当long_running_function（）完成时？
我已经尝试过在我的代码中说明的方法，它似乎有效 - 但也许这只是运气？
关心Joakim
I am programming with C and pthreads. I have a long running function which I want to run in a seperate thread:
void long_running_function(void * arg) { ... } void start_long_running_function(void * arg) { pthread_t thread; pthread_create( &thread , NULL , long_running_function , arg); /* What about the thread variable? */ }When leaving the start_long_running_function() function the local variable 'thread' will go out of scope. Is this OK - or can I risk problems e.g. when the long_running_function() is complete?
I have tried the approach illustrated in my code, and it seems to work - but maybe that is only luck?
Regards Joakim
原文：https://stackoverflow.com/questions/6855857
更新时间：2022-11-21 08:11
最满意答案
I would try using a while loop to encase the switch. So it keeps asking your input. import java.util.Scanner; public class SwitchTry { public static void main(String[] args) { while(true){ int mth; String mthString; Scanner scanner = new Scanner(System.in); mth =scanner.nextInt(); switch (mth) { case 1: mthString = "January"; break; case 2: mthString = "February"; break; case 3: mthString = "March"; break; case 4: mthString = "April"; break; case 5: mthString = "May"; break; case 6: mthString = "June"; break; case 7: mthString = "July"; break; case 8: mthString = "August"; break; case 9: mthString = "September"; break; case 10: mthString = "October"; break; case 11: mthString = "November"; break; case 12: mthString = "December"; break; default: mthString = "Error"; break; } System.out.println(mthString); } } }I would try using a while loop to encase the switch. So it keeps asking your input. import java.util.Scanner; public class SwitchTry { public static void main(String[] args) { while(true){ int mth; String mthString; Scanner scanner = new Scanner(System.in); mth =scanner.nextInt(); switch (mth) { case 1: mthString = "January"; break; case 2: mthString = "February"; break; case 3: mthString = "March"; break; case 4: mthString = "April"; break; case 5: mthString = "May"; break; case 6: mthString = "June"; break; case 7: mthString = "July"; break; case 8: mthString = "August"; break; case 9: mthString = "September"; break; case 10: mthString = "October"; break; case 11: mthString = "November"; break; case 12: mthString = "December"; break; default: mthString = "Error"; break; } System.out.println(mthString); } } }
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