Pthread Error Code 22
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Pthread_create.c No Such File Or Directory
Overflow Community Stack Overflow is a community of 6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign pthread_join error code 22 up pthread_mutex_lock returns invalid argument up vote 4 down vote favorite I am working on some C code and am having a problem with locking a mutex. The code does a call to a function and this function locks a mutex gdb pthread_join c no such file or directory to ensure a file pointer doesn't get overwritten, this works fine for several instances, probably about 10-20 separate calls of the function being called, but on the next call, pthread_mutex_lock will return with a result of 22. I've then put this result into strerror(); and got back invalid argument. What does invalid argument means, thanks for any help you can provide. c debugging pthreads mutex share|improve this question edited Oct 8 '12 at 12:43 vy32 9,0311661128 asked Oct 8 '12 at 12:39 Boardy 9,90554168284
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add a comment| 2 Answers 2 active oldest votes up vote 4 down vote accepted Sounds like you have a threading problem or a wild point somewhere else in your program. Try printing the value of the mutex pointer. Try having another thread that simply locks the mutex and then prints to a log file the time and that the lock was successful, then unlocks the mutex. I suspect the problem is not where you are looking. Also, as other have said here, your best bet is to create a very small test program that demonstrates the problem and post it here. Chances are you won't be able to get that small program to demonstrate the error. Then slowly add all of your original code into the small program until the error returns. If it returns, you now know what caused the problem. If it doesn't return, you're done. share|improve this answer answered Oct 8 '12 at 12:43 vy32 9,0311661128 add a comment| up vote 7 down vote 22 is ENVAL error code which means invlalid argument. Make sure that you have initilized you mutex, or if at some point you have unitilized it somewhere. Also man pthread_mutex_lock says: EINVAL The mutex was created with the protocol attribute having the value PTHREAD_PRIO_PROTECT and the calling thread's priority is higher than the mutex's current priority ceiling. I don't quite understand this but it probably means that you need to change thread's priority. I am not sure. Maybe someone e
Sign in Pricing Blog Support Search GitHub This repository Watch 118 Star 838 errno 22 Fork 126 dart-lang/sdk Code Issues 3,982 Pull requests 3 pthread_create example Projects 0 Wiki Pulse Graphs New issue runtime/vm/os_thread_linux.cc:234: error: pthread error: 22 (Invalid argument) #24169 Closed kodandersson opened this Issue Aug 21, 2015 · 3 comments Projects None yet Labels area-vm Milestone 1.12 Assignees kodandersson http://stackoverflow.com/questions/12781944/pthread-mutex-lock-returns-invalid-argument 1 participant kodandersson commented Aug 21, 2015 http://build.chromium.org/p/client.dart/builders/vm-linux-debug-ia32-be/builds/4811/steps/tests/logs/stdio @iposva-google kodandersson added the Area-VM label Aug 21, 2015 kodandersson commented Aug 21, 2015 @johnmccutchan kodandersson self-assigned this Aug 21, 2015 kodandersson added this to the 1.12 milestone Aug 21, 2015 kodandersson commented Aug 21, 2015 Seems something is locking a https://github.com/dart-lang/sdk/issues/24169 mutex (probably StoreBuffer::global_mutex_) after its destruction. kodandersson commented Aug 21, 2015 At Dart::CleanUp time, there may still be threads around that access their store buffer, so we need to keep the global_mutex_ around until @zanderso lands the clean shutdown CL. kodandersson added a commit that referenced this issue Aug 21, 2015 kodandersson … At Dart::CleanUp time, there may still be threads around that access their store buffer, so we need to keep these around until @zanderso lands the clean shutdown
pthread_attr_t attr; pthread_attr_init( &attr ); // returns 0 pthread_attr_setdetachstate( &attr, PTHREAD_CREATE_JOINABLE ); // returns 0 #ifdef SCHED_RR // is defined! if ( options && (options->flags & RTAUDIO_SCHEDULE_REALTIME) ) { struct sched_param param; int priority = http://www.cplusplus.com/forum/unices/79490/ options->priority; int min = sched_get_priority_min( SCHED_RR ); int max = sched_get_priority_max( SCHED_RR ); if ( priority < min ) priority = min; else if ( priority > max ) priority = https://software.intel.com/en-us/forums/intel-many-integrated-core/topic/536182 max; param.sched_priority = priority; pthread_attr_setschedparam( &attr, ¶m ); // returns 22... pthread_attr_setschedpolicy( &attr, SCHED_RR ); // returns 0 // test begin: int x = pthread_attr_getschedparam( &attr, ¶m ); int prio error code = param.sched_priority; printf("\nPriority : %d \n", priority); // // returns 49 printf("\ngetsched : %d \n", x); // // returns 0 printf("\nT-Priority : %d \n", prio); // // returns 0 // test end } else //... I put these lines (test begin to test end) to the code, to see, if thread priority is really working. In the application "priority" is set pthread error code (here) to 49. This test shows, that it is not working (prio = 0). Is there a mistake in the API or is my test-code wrong? My second question: If I set process-priority (in the application), how does this value interact with thread priority? For all threads? Regards Thomas Last edited on Sep 19, 2012 at 7:43am UTC Sep 18, 2012 at 7:30pm UTC Cubbi (4009) You're not checking the return values of those pthread_attr functions. Check if they return errors. A typical cause of a failure would be not running this test as root or having a restrictive ulimit -r (even as root) Sep 19, 2012 at 7:03am UTC TJF (11) I've checked them now: pthread_attr_setschedparam( &attr, ¶m ); returns a non zero value (=22). ulimit -r is set to 99. The same as root or as user... I put all return values in my first post. Even if I set priority to "0" instead of "49" (in the app), it returns the non zero "22". Last edited on Sep 19, 2012 at 10:26am UTC Sep 19, 2012 at 5:37pm
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