pthread编程（3）——线程除法溢出

异常处理与信号机制在多线程编程中的应用

最新推荐文章于 2025-09-10 17:59:49 发布

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最新推荐文章于 2025-09-10 17:59:49 发布

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文章标签： python

原文链接：https://my.oschina.net/iCode0410/blog/104568

本文探讨了在多线程环境下如何使用信号机制来捕获并处理异常，通过设置自定义信号处理器，实现了在发生除零等错误时能够优雅地进行错误处理，避免了整个进程因异常而终止。

2019独角兽企业重金招聘Python工程师标准>>>

#include <pthread.h>
#include <signal.h>
#include <stdio.h>

#define ERROR printf("error @ %s line %d\n", __FILE__, __LINE__ );

void thread_cleanup( void *arg )
{
	printf( "cleanup is called\n" );
} 

void* threadfn_exception( void *arg )
{
	int i = 3;
	
	i /= 0;

	return NULL;
}

// FIXME
// endless output: catch a SIGFPE signal

void sigfpe_handler( int sig )
{
	printf( "catch a SIGFPE signal\n" );
}  

// exceptions in a thread may cause the whole process to be terminated!!

int main(int argc, char const *argv[])
{
	pthread_t thread;
	
	// if we set the handler to SIG_IGN/SIG_DFL, the process will be killed
	// signal does't work well if portability is taken into consideration, alternative is sigaction(3)
	signal( SIGFPE, sigfpe_handler );

	if( pthread_create( & thread, NULL, threadfn_exception, NULL ) )
	{
		ERROR;
		return -1;
	}
	if( pthread_join( thread, NULL ) )
	{
		ERROR;
		return -2;
	}
	printf("Done!\n");
	return 0;
}

转载于:https://my.oschina.net/iCode0410/blog/104568