Pthread_mutex_init Error 95

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Pthread_mutex_init Man

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Pthread_mutex_init Attributes

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Pthread_mutex_init Recursive

6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up pthread 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_initializer example = 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 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

- operations on mutexes Synopsis #include #include pthread_mutex_t fastmutex = PTHREAD_MUTEX_INITIALIZER; pthread_mutex_t recmutex = PTHREAD_RECURSIVE_MUTEX_INITIALIZER; pthread_mutex_t errchkmutex = PTHREAD_ERRORCHECK_MUTEX_INITIALIZER; pthread_mutex_t recmutex = PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP; pthread_mutex_t errchkmutex = PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP; int pthread_mutex_init(pthread_mutex_t *mutex, const pthread_mutexattr_t pthread_mutexattr_t *mutexattr); int pthread_mutex_lock(pthread_mutex_t *mutex); int pthread_mutex_trylock(pthread_mutex_t *mutex); int pthread_mutex_timedlock(pthread_mutex_t *mutex, const pthread_cond_init 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); Description A mutex is pthread_mutex example 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: http://stackoverflow.com/questions/20068406/pthread-mutex-init-returned-error-95 unlocked (not owned by any thread), and 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 https://www.sourceware.org/pthreads-win32/manual/pthread_mutex_init.html 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 “fast� mutexes), PTHREAD_RECURSIVE_MUTEX_INITIALIZER (for recursive mutexes), and PTHREAD_ERRORCHECK_MUTEX_INITIALIZER (for error checking mutexes). In the Pthreads-w32 implementation, an application should still call pthread_mutex_destroy at some point to ensure that any resources consumed by the mutex are released. Any mutex type can be initialized as a robust mutex. See pthread_mutexattr_init(3) for more information as well as the section Robust Mutexes below. pthread_mutex_lock locks the given mutex. If the mutex is currently unlocked, it becomes locked and owned by the calling thread, and pthread_mutex_lock returns immediately. If the mutex is already locked by another thread, pthread_mutex_lock su

[Raw text] weirdness on 95 From: "J S" To: cygwin-xfree at cygwin dot com Date: Tue, 10 Jun 2003 14:58:22 https://cygwin.com/ml/cygwin-xfree/2003-06/msg00229.html +0000 Subject: weirdness on 95 Bcc: Reply-to: cygwin-xfree at cygwin https://gcc.gnu.org/ml/gcc-help/2008-01/msg00289.html dot com Hi all, I have a windows 95 machine which is having problems. If I run XWin, the root window begins to fire up and then dies straight away. I have copied some of the log for you to see pthread_mutex_init error below. I had the same problem when I tested the latest XWin-Test91 also. I tried 32 and 16 bit color (no 24) but that wasn't the problem so I don't really know what it could be. There are a few messages in the log below marked "WEIRDNESS" so hopefully that might pthread_mutex_init error 95 mean something to you. Let me know if there's anymore info I need to supply. Cheers, JS. ddxProcessArgument - Initializing default screens winInitializeDefaultScreens - w 800 h 600 winInitializeDefaultScreens - Returning OsVendorInit - Creating bogus screen 0 (==) Using config file: "/etc/X11/XF86Config" Markers: (--) probed, (**) from config file, (==) default setting, (++) from command line, (!!) notice, (II) informational, (WW) warning, (EE) error, (??) unknown. (**) FontPath set to "/usr/X11R6/lib/X11/fonts/local/,/usr/X11R6/lib/X11/fonts/misc/,/usr/X11R6/lib/X11/fonts/Type1/,/usr/X11R6/lib/X11/fonts/Speedo/,/usr/X11R6/lib/X11/fonts/75dpi/,/usr/X11R6/lib/X11/fonts/100dpi/" (**) RgbPath set to "/usr/X11R6/lib/X11/rgb" winDetectSupportedEngines - Windows 95/98/Me winDetectSupportedEngines - DirectDraw installed winDetectSupportedEngines - Returning, supported engines 00000013 InitOutput - g_iNumScreens: 1 iMaxConsecutiveScreen: 1 winSetEngine - Multi Window => ShadowGDI winAdjustVideoModeShadowGDI - Using Windows display depth of 32 bits per pixel winCreateBoundingWindowWindowed - User w: 800 h: 600 winCreateBoundingWindowWindowed - Current w: 800 h: 600 winAdjustForAutoHide - Original WorkArea: 0 0 572 800 winAdjustForAutoHide - Adjusted WorkArea: 0 0 572 800 winCreateBoundingWindowWindowed - WindowClient w 800 h 572 r

Building a cross-compiler From: "Wenton L. Davis" To: gcc-help at gcc dot gnu dot org Date: Mon, 28 Jan 2008 14:53:46 -0700 Subject: Building a cross-compiler I am finally going to admit defeat and come ask for help on this. I am trying to build a cross-compiler to run on an x86 machine for several targets: ARM, MIPS, AVR, and m681x. I would like a single compiler to handle those 4 architectures in addition to the x86, eventually. However, for now, I am just trying to get the individual targets able to compile. I can get the binutils to compile/install/run just fine. The compiler build, however, is not cooperating, and I am almost certain I am overlooking something remarkably simple, but I just don't see it. I have my source tree installed in /mnt/tmp/gcc-4.1.2 and I am building in /mnt/tmp/objdir. (I found one recommendation to always build in a seperate directory.) I configure it with the following (as run from in objdir): ../gcc-4.1.2/configure --prefix=/mnt/tmp --program-prefix=mips-elf- \ --target=mips-elf --enable-threads=posix --enable-shared \ --enable-languages=c --disable-checking --with-gnu-ld --verbose This should, as I understand it, build the MIPS's compiler and after running "make install"put it in the /mnt/tmp/bin directory, prefixing each executable with "mips-elf-" right? After configure runs, I just type 'make' to build the compiler. Everything goes OK (now that I figured out the --enable-threads=posix thing), until I get to this (I apologize about the formatting, but I wanted to send exactly what I see): /mnt/tmp/objdir/./gcc/xgcc -B/mnt/tmp/objdir/./gcc/ -B/mnt/tmp/mips-elf/bin/ -B/mnt/tmp/mips-elf/lib/ -isystem /mnt/tmp/mips-elf/include -isystem /mnt/tmp/mips-elf/sys-include -O2 -O2 -g -O2 -DIN_GCC -DCROSS_COMPILE -W -Wall -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition -isystem ./include -G 0 -g -DHAVE_GTHR_DEFAULT -DIN_LIBGCC2 -D__GCC_FLOAT_NOT_NEEDED -Dinhibit_libc -I. -I. -I../../gcc-4.1.2/gcc -I../../gcc-4.1.2/gcc/. -I../../gcc-4.1