CFRunLoopRun() 和 NSTimer ->分段错误
预先感谢任何帮助我的人。
我有一个简单的守护进程。我分配一个班级,然后开始预定的课程。重复 NSTimer:
[NSTimer scheduledTimerWithTimeInterval:3.0 target:self selector:@selector(usage3GviaSysctl) userInfo:nil repeats:YES];
然后我调用 CFRunLoopRun() 以便我的守护进程保持活动状态。
int main(int argc, char *argv[])
{
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
signal(SIGTERM, (sig_t)SIGTERM_handler);
helper = [[NMDaemonHelper alloc] init];
[helper startNotificationServer];
CFRunLoopRun();
NSLog(@"NMDAEMON: will exit");
[pool release];
return 0;
}
现在的问题是,在计时器触发后,我遇到了段错误。 bt:
objc_msgSend
__NSFireTimer
__CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__
__CFRunLoopDoTImer
__CFRunLoopRun
CFRunLoopRunSpecific
启动计时器的其他方法也不起作用。例如:
NSTimer *timeUpdateTimer = [[NSTimer alloc] initWithFireDate:[NSDate date] interval:1 target:self selector:@selector(usage3GviaSysctl) userInfo:nil repeats:YES];
[[NSRunLoop currentRunLoop] addTimer:timeUpdateTimer forMode:NSDefaultRunLoopMode];
有人知道 (wr)on(g) 发生了什么吗?
Thanks in advance to anyone who is helping me.
I've a simple daemon. I allocate a class and then start a scheduled & repeating NSTimer:
[NSTimer scheduledTimerWithTimeInterval:3.0 target:self selector:@selector(usage3GviaSysctl) userInfo:nil repeats:YES];
then I call CFRunLoopRun() so that my daemon will stay alive.
int main(int argc, char *argv[])
{
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
signal(SIGTERM, (sig_t)SIGTERM_handler);
helper = [[NMDaemonHelper alloc] init];
[helper startNotificationServer];
CFRunLoopRun();
NSLog(@"NMDAEMON: will exit");
[pool release];
return 0;
}
Now the problem is that after the timer fires I get a segfault.
bt:
objc_msgSend
__NSFireTimer
__CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__
__CFRunLoopDoTImer
__CFRunLoopRun
CFRunLoopRunSpecific
other ways to start the timer didn't work either. for example:
NSTimer *timeUpdateTimer = [[NSTimer alloc] initWithFireDate:[NSDate date] interval:1 target:self selector:@selector(usage3GviaSysctl) userInfo:nil repeats:YES];
[[NSRunLoop currentRunLoop] addTimer:timeUpdateTimer forMode:NSDefaultRunLoopMode];
Has anybody an idea what's going (wr)on(g)?
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我的猜测是你的选择器没有正确的格式......需要有一个 NSTimer 参数,所以你的选择器必须有“:”,所以@selector(usage3GviaSysctl :)。
...我自己尝试过,似乎有效,所以这是我的代码,以防万一它是其他东西:
...输出是:
pho0$ ./climac
2011-03-25 18:43:36.723 climac[2833:903] 计时器已启动
2011-03-25 18:43:39.723 climac[2833:903] 计时器启动
2011-03-25 18:43:42.722 climac[2833:903] 计时器已启动
2011-03-25 18:43:45.722 climac[2833:903] 计时器启动
2011-03-25 18:43:48.722 climac[2833:903] 计时器启动
2011-03-25 18:43:51.722 climac[2833:903] 计时器启动
My guess is your selector doesn't have the right format ... needs to have an NSTimer argument, so your selector has to have the ":" in it, so @selector(usage3GviaSysctl:).
... I tried it myself and seems to works so here's my code in case it was something else:
... and output is:
pho0$ ./climac
2011-03-25 18:43:36.723 climac[2833:903] timer fired
2011-03-25 18:43:39.723 climac[2833:903] timer fired
2011-03-25 18:43:42.722 climac[2833:903] timer fired
2011-03-25 18:43:45.722 climac[2833:903] timer fired
2011-03-25 18:43:48.722 climac[2833:903] timer fired
2011-03-25 18:43:51.722 climac[2833:903] timer fired