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Pthread_mutex_init Error 95

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Pthread_mutex_init Man

more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x pthread_mutex_init attributes Dismiss Join the Stack 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 up pthread pthread_mutex_init recursive mutex_init returned error 95 up vote 0 down vote favorite I am trying to initialize the pthread_mutex_init with attribute my_attr. int settype_retValue=pthread_mutexattr_settype( &my_attr, PTHREAD_MUTEX_RECURSIVE); cout << " settype_retValue =0" << settype_retValue << endl; int nRet = pthread_mutex_init(&blist_mutex, &my_attr); if( nRet ) cout << " mutex_init returned " << nRet << endl; else cout << " mutex_init has initilised without any error\n; After compiling above

Pthread_mutex_initializer Example

set of code I am getting error as below and it is hanging over there. OUTPUT::==> settype_retValue =0 mutex_init returned 95 Can anyone please help to understand why I am getting return value for 95. What is significance of 95. I know that if mutex_init fails it gives one of the following error:: EINVAL The attribute set is not initialized EINVAL The specified protocol is invalid EAGAIN The system lacked the necessary resources to initialize another mutex. ENOMEM Insufficient memory exists to initialize the mutex. EBUSY Attempted to reinialize the object reference May know 95 refers to which one of the above or 95 means something other. And also how to do GDB debugging to go into the phterad library. Thanks in Advance c++ linux multithreading pthreads posix share|improve this question edited Nov 19 '13 at 12:01 asked Nov 19 '13 at 10:00 Pravin.2087 134 How are blist_mutex and settype_retValue defined ? –Claudio Nov 19 '13 at 10:11 1 On Linux, 95 is "EOPNOTSUPP" (not supported). Have you initialised my_attr correctly? –Mike Seymour Nov 19 '13 at 10:17 Check the definitions of blist_mutex and se

- operations on mutexes Synopsis #include #include pthread_mutex_t fastmutex = PTHREAD_MUTEX_INITIALIZER; pthread_mutex_t recmutex = PTHREAD_RECURSIVE_MUTEX_INITIALIZER; pthread_mutex_t pthread_mutexattr_t errchkmutex = PTHREAD_ERRORCHECK_MUTEX_INITIALIZER; pthread_mutex_t recmutex = PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP; pthread_mutex_t pthread_cond_init errchkmutex = PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP; int pthread_mutex_init(pthread_mutex_t *mutex, const pthread_mutexattr_t *mutexattr); int pthread_mutex_lock(pthread_mutex_t *mutex);

Pthread_mutex Example

int pthread_mutex_trylock(pthread_mutex_t *mutex); int pthread_mutex_timedlock(pthread_mutex_t *mutex, const struct timespec *abs_timeout); int pthread_mutex_unlock(pthread_mutex_t *mutex); int pthread_mutex_consistent(pthread_mutex_t *mutex); int pthread_mutex_destroy(pthread_mutex_t *mutex); http://stackoverflow.com/questions/20068406/pthread-mutex-init-returned-error-95 Description A mutex is a MUTual EXclusion device, and is useful for protecting shared data structures from concurrent modifications, and implementing critical sections and monitors. A mutex has two possible states: unlocked (not owned by any thread), and https://www.sourceware.org/pthreads-win32/manual/pthread_mutex_init.html locked (owned by one thread). A mutex can never be owned by two different threads simultaneously. A thread attempting to lock a mutex that is already locked by another thread is suspended until the owning thread unlocks the mutex first. pthread_mutex_init initializes the mutex object pointed to by mutex according to the mutex attributes specified in mutexattr. If mutexattr is NULL, default attributes are used instead. The type of a mutex determines whether it can be locked again by a thread that already owns it. The default type is “normal�. See pthread_mutexattr_init(3) for more information on mutex attributes. Variables of type pthread_mutex_t can also be initialized statically, using the constants PTHREAD_MUTEX_INITIALIZER (for normal

instructions: Windows Mac Red Hat Linux Ubuntu Click URL instructions: Right-click on ad, choose "Copy Link", then paste here → (This may https://sourceforge.net/p/valgrind/mailman/message/16341153/ not be possible with some types of ads) More information about our ad policies X You seem to have CSS turned off. Please don't fill out this field. https://android.googlesource.com/platform/external/valgrind/+/844a655%5E!/ You seem to have CSS turned off. Please don't fill out this field. Briefly describe the problem (required): Upload screenshot of ad (required): Select a file, or drag pthread_mutex_init error & drop file here. ✔ ✘ Please provide the ad click URL, if possible: Home Browse Valgrind, an open-source memory debugger Mailing Lists Valgrind, an open-source memory debugger Brought to you by: njn, sewardj Summary Files Reviews Support Wiki Mailing Lists Code valgrind-announce valgrind-developers valgrind-testresults valgrind-users valgrind-valkyrie-dev [Valgrind-developers] valgrind: r7077 - branches/THRCHECK/thrcheck/tests [Valgrind-developers] valgrind: r7077 pthread_mutex_init error 95 - branches/THRCHECK/thrcheck/tests From: - 2007-11-01 17:59:50 Author: sewardj Date: 2007-11-01 17:59:40 +0000 (Thu, 01 Nov 2007) New Revision: 7077 Log: Update expected output following r7075. Modified: branches/THRCHECK/thrcheck/tests/tc20_verifywrap.stderr.exp-glibc25-amd64 Modified: branches/THRCHECK/thrcheck/tests/tc20_verifywrap.stderr.exp-glibc25-amd64 =================================================================== --- branches/THRCHECK/thrcheck/tests/tc20_verifywrap.stderr.exp-glibc25-amd64 2007-11-01 17:15:35 UTC (rev 7076) +++ branches/THRCHECK/thrcheck/tests/tc20_verifywrap.stderr.exp-glibc25-amd64 2007-11-01 17:59:40 UTC (rev 7077) @@ -1,5 +1,8 @@ + +------ This is output for >= glibc 2.4 ------ + ---------------- pthread_create/join ---------------- Thread #1 is the program's root thread @@ -9,10 +12,10 @@ by 0x........: ... by 0x........: pthread_create@... (in /lib/libpthread...) by 0x........: pthread_create@* (tc_intercepts.c:...) - by 0x........: main (tc20_verifywrap.c:64) + by 0x........: main (tc20_verifywrap.c:76) Possible data race during write of size 2 at 0x........ - at 0x........: main (tc20_verifywrap.c:66) + at 0x........: main (tc20_verifywrap.c:78) Old state: owned exclusively by thread #2 New state: shared-modified by threads #1, #2 Reason: this thread, #1, holds no locks at all @@ -20,7 +23,7 @@ Thread #1's call to pthread_join failed with error code 35 (EDEADLK: Resource deadlock would occur) at 0x........: pthread_join (tc_intercepts.c:...) - by 0x........:

19 09:46:17 2008 +0000tree9ce226f9ab8cbf01c65731b61e935b3fc8284aa0parent575e48f2a535dadaef77288ac54f1fea7f2ffd91 [diff]Update expected outputs for glibc25-amd64. git-svn-id: svn://svn.valgrind.org/valgrind/trunk@8843 a5019735-40e9-0310-863c-91ae7b9d1cf9 diff --git a/helgrind/tests/tc18_semabuse.stderr.exp-glibc25-amd64 b/helgrind/tests/tc18_semabuse.stderr.exp-glibc25-amd64 index f0519c0..c2077ed 100644 --- a/helgrind/tests/tc18_semabuse.stderr.exp-glibc25-amd64 +++ b/helgrind/tests/tc18_semabuse.stderr.exp-glibc25-amd64 @@ -1,12 +1,12 @@ -Thread #1 is the program's root thread +Thread #x is the program's root thread -Thread #1's call to sem_init failed +Thread #x's call to sem_init failed with error code 22 (EINVAL: Invalid argument) at 0x........: sem_init@* (hg_intercepts.c:...) by 0x........: main (tc18_semabuse.c:23) -Thread #1: Bug in libpthread: sem_wait succeeded on semaphore without prior sem_post +Thread #x: Bug in libpthread: sem_wait succeeded on semaphore without prior sem_post at 0x........: sem_wait_WRK (hg_intercepts.c:...) by 0x........: sem_wait (hg_intercepts.c:...) by 0x........: main (tc18_semabuse.c:34) diff --git a/helgrind/tests/tc20_verifywrap.stderr.exp-glibc25-amd64 b/helgrind/tests/tc20_verifywrap.stderr.exp-glibc25-amd64 index 3651269..e0fd6ea 100644 --- a/helgrind/tests/tc20_verifywrap.stderr.exp-glibc25-amd64 +++ b/helgrind/tests/tc20_verifywrap.stderr.exp-glibc25-amd64 @@ -5,26 +5,26 @@ ---------------- pthread_create/join ---------------- -Thread #1 is the program's root thread +Thread #x is the program's root thread -Thread #2 was created +Thread #x was created at 0x........: clone (in /...libc...) - by 0x........: ... + by 0x........: do_clone (in /lib/libpthread...) by 0x........: pthread_create@GLIBC_ (in /lib/libpthread...) by 0x........: pthread_create@* (hg_intercepts.c:...) by 0x........: main (tc20_verifywrap.c:76) -Possible data race during write of size 2 at 0x........ by thread #1 +Possible data race during write of size 2 at 0x........ by thread #x at 0x........: main (tc20_verifywrap.c:78) - This conflicts with a previous access by thread #2 + This conflicts with a previous write of size 2 by thread #x at 0x........: racy_child (tc20_verifywrap.c:34) by 0x........: mythread_wrapper (hg_intercepts.c:...) - by 0x........: ... - by 0x........: ... + by 0x........: start_thread (in /lib/libpthread...) + by 0x........: clone (in /...libc...) Location 0x........ is 0 bytes inside global var "unprotected" declar

 

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pthread_mutex_init error handling

Pthread mutex init Error Handling p const pthread mutexattr t i attr i int pthread mutex destroy pthread mutex t i mutex i pthread mutex t i mutex i PTHREAD MUTEX INITIALIZER DESCRIPTION The pthread mutex init function initialises the mutex referenced by mutex Pthread mutex init Example with attributes specified by attr If attr is NULL the pthread mutex init c default mutex attributes are used the effect is the same as passing the address pthread mutex init attributes of a default mutex attributes object Upon successful initialisation the state of the mutex becomes initialised and unlocked Attempting to

pthread_mutex_init error 22

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