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Pthread_create Error Numbers

PTHREAD_CREATE(3) NAME top pthread_create - create a new thread SYNOPSIS top #include int pthread_create(pthread_t *thread, const pthread_attr_t *attr, void *(*start_routine) (void *), void *arg); Compile and pthread_create example link with -pthread. DESCRIPTION top The pthread_create() function starts a pthread_create tutorial new thread in the calling process. The new thread starts execution by invoking start_routine(); arg is passed as the sole argument

Pthread_create Arguments

of start_routine(). The new thread terminates in one of the following ways: * It calls pthread_exit(3), specifying an exit status value that is available to another thread in the same process that calls pthread_join(3). *

Pthread_create Arguments Explanation

It returns from start_routine(). This is equivalent to calling pthread_exit(3) with the value supplied in the return statement. * It is canceled (see pthread_cancel(3)). * Any of the threads in the process calls exit(3), or the main thread performs a return from main(). This causes the termination of all threads in the process. The attr argument points to a pthread_attr_t structure whose contents are used at thread creation time to pthread_create linux determine attributes for the new thread; this structure is initialized using pthread_attr_init(3) and related functions. If attr is NULL, then the thread is created with default attributes. Before returning, a successful call to pthread_create() stores the ID of the new thread in the buffer pointed to by thread; this identifier is used to refer to the thread in subsequent calls to other pthreads functions. The new thread inherits a copy of the creating thread's signal mask (pthread_sigmask(3)). The set of pending signals for the new thread is empty (sigpending(2)). The new thread does not inherit the creating thread's alternate signal stack (sigaltstack(2)). The new thread inherits the calling thread's floating-point environment (fenv(3)). The initial value of the new thread's CPU-time clock is 0 (see pthread_getcpuclockid(3)). Linux-specific details The new thread inherits copies of the calling thread's capability sets (see capabilities(7)) and CPU affinity mask (see sched_setaffinity(2)). RETURN VALUE top On success, pthread_create() returns 0; on error, it returns an error number, and the contents of *thread are undefined. ERRORS top EAGAIN Insufficient resources to create another thread. EAGAIN A system-imposed limit on the number of threads was encountered. There are a number of limits that may trigger this error: the RLIMIT_NPRO

void *(*start_routine)(void*), void *arg); DESCRIPTION The pthread_create() function is used to create a new thread, with attributes specified by attr, within a process. If attr is NULL, the default attributes are used. If the

Undefined Reference To `pthread_create'

attributes specified by attr are modified later, the thread's attributes are not pthread_join affected. Upon successful completion, pthread_create() stores the ID of the created thread in the location referenced by thread. pthread_create multiple arguments The thread is created executing start_routine with arg as its sole argument. If the start_routine returns, the effect is as if there was an implicit call to pthread_exit() using the http://man7.org/linux/man-pages/man3/pthread_create.3.html return value of start_routine as the exit status. Note that the thread in which main() was originally invoked differs from this. When it returns from main(), the effect is as if there was an implicit call to exit() using the return value of main() as the exit status. The signal state of the new thread is initialised as follows: The signal http://pubs.opengroup.org/onlinepubs/7908799/xsh/pthread_create.html mask is inherited from the creating thread. The set of signals pending for the new thread is empty. If pthread_create() fails, no new thread is created and the contents of the location referenced by thread are undefined. RETURN VALUE If successful, the pthread_create() function returns zero. Otherwise, an error number is returned to indicate the error. ERRORS The pthread_create() function will fail if: [EAGAIN] The system lacked the necessary resources to create another thread, or the system-imposed limit on the total number of threads in a process PTHREAD_THREADS_MAX would be exceeded. [EINVAL] The value specified by attr is invalid. [EPERM] The caller does not have appropriate permission to set the required scheduling parameters or scheduling policy. The pthread_create() function will not return an error code of [EINTR]. EXAMPLES None. APPLICATION USAGE None. FUTURE DIRECTIONS None. SEE ALSO pthread_exit(), pthread_join(), fork(), . DERIVATION Derived from the POSIX Threads Extension (1003.1c-1995) UNIX is a registered Trademark of The Open Group. Copyright © 1997 The Open Group [ Main Index | XSH | XCU | XBD | XCURSES | XNS ]

-pthread. Description The pthread_create() function starts a new thread in the calling process. The new thread starts execution by invoking start_routine(); arg is passed as the sole argument of start_routine(). The new thread terminates in one of https://linux.die.net/man/3/pthread_create the following ways: * It calls pthread_exit(3), specifying an exit status value that http://www.thecodingforums.com/threads/re-pthread_create-returns-error-code-11.685758/ is available to another thread in the same process that calls pthread_join(3). * It returns from start_routine(). This is equivalent to calling pthread_exit(3) with the value supplied in the return statement. * It is canceled (see pthread_cancel(3)). * Any of the threads in the process calls exit(3), or the main thread performs a return pthread_create arguments from main(). This causes the termination of all threads in the process. The attr argument points to a pthread_attr_t structure whose contents are used at thread creation time to determine attributes for the new thread; this structure is initialized using pthread_attr_init(3) and related functions. If attr is NULL, then the thread is created with default attributes. Before returning, a successful call to pthread_create() stores the ID of pthread_create error numbers the new thread in the buffer pointed to by thread; this identifier is used to refer to the thread in subsequent calls to other pthreads functions. The new thread inherits a copy of the creating thread's signal mask (pthread_sigmask(3)). The set of pending signals for the new thread is empty (sigpending(2)). The new thread does not inherit the creating thread's alternate signal stack (sigaltstack(2)). The new thread inherits the calling thread's floating-point environment (fenv(3)). The initial value of the new thread's CPU-time clock is 0 (see pthread_getcpuclockid(3)). Linux-specific details The new thread inherits copies of the calling thread's capability sets (see capabilities(7)) and CPU affinity mask (see sched_setaffinity(2)). Return Value On success, pthread_create() returns 0; on error, it returns an error number, and the contents of *thread are undefined. Errors EAGAIN Insufficient resources to create another thread, or a system-imposed limit on the number of threads was encountered. The latter case may occur in two ways: the RLIMIT_NPROC soft resource limit (set via setrlimit(2)), which limits the number of process for a real user ID, was reached; or the kernel's system-wide limit on the number of threads, /proc/sys/kernel/threads-max, was reached. EINVAL Invalid settings in attr. EPERM No permission

I agree with asking the next question in the threading group.] >i have a code that uses pthread, but when i use pthread_create() >method it returns error code 11. That would depend on what error 11 is. On my system, errno.h says: #define EDEADLK 11 /* Resource deadlock avoided */ /* 11 was EAGAIN */ So, 11 once was EAGAIN, which is a known return for pthread_create(). It may still be on your implementation. My system's man page says: The pthread_create() function will fail if: [EAGAIN] The system lacked the necessary resources to create another thread, or the system-imposed limit on the total number of threads in a process [PTHREAD_THREADS_MAX] would be exceeded. >I have found out that this is often >because of exceeding the THREAD_MAX limit for the process. But i want >to use only about 24 threads at a given time, and i destroy the >threads (or atleast i thought so) can someone tell me what i am doing >wrong here it would be of great help! thanks! My next guess is that your system won't allow a user process to run 24 (additional) threads. But most of what I can say about pthreads is guesses. The experts in comp.programming.threads know this stuff inside and out. -- Drew Lawson Some men's dreams for others turn to nightmares. I never would have thought this in my wildest dreams. Drew Lawson, May 27, 2009 #1 Advertisements Antoninus Twink Guest On 27 May 2009 at 16:51, Drew Lawson wrote: > Harshith <> writes: >>i have a code that uses pthread, but when i use pthread_create() >>method it returns error code 11. > > That would depend on what error 11 is. On my system, errno.h says: > #define EDEADLK 11 /* Resource deadlock avoided */ > /* 11 was EAGAIN */ > > So, 11 once was EAGAIN, which is a known return for pthread_create(). > It may still be on your implementation. It seems likely that it is, given the code that produced it. Of course, he can find out for sure by passing the return value from pthread_create() to strerror(). Antoninus Twink, May 28, 2009 #2 Advertisements Show Ignored Content Want to reply to this thread or ask your own question? It takes just 2 minutes to sign up (and it's free!). Just click the sign up button to choose a username and then you can ask your own questions on the forum. Sign Up Now! Similar Threads pthread_create for class ? vertigo, Aug 28, 2004, in forum: Java Replies: 4 Views: 1,125 Tor Iver Wilhelmsen Aug 29,

 

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pthread create error

Pthread Create Error p PTHREAD CREATE NAME top pthread create - create a new thread SYNOPSIS top include pthread h int pthread create pthread t thread const pthread attr t attr void start routine void pthread create example void arg Compile and link with -pthread DESCRIPTION pthread create arguments top The pthread create function starts a new thread in the calling process The new thread starts execution by invoking start routine Pthread create Tutorial arg is passed as the sole argument of start routine The new thread terminates in one of the following ways It calls pthread exit specifying an

pthread create error codes

Pthread Create Error Codes p PTHREAD CREATE NAME top pthread create - create a new thread SYNOPSIS top include pthread h int pthread create pthread t thread const pthread attr t attr void start routine void void arg Compile and link with -pthread DESCRIPTION pthread create example top The pthread create function starts a new thread in the pthread create arguments calling process The new thread starts execution by invoking start routine arg is passed as the sole argument of start routine The new thread pthread create tutorial terminates in one of the following ways It calls pthread exit specifying

pthread error values

Pthread Error Values p void i start routine i void void i arg i DESCRIPTION The pthread create function is used to create a new thread with attributes specified by attr within a process If attr is NULL the default attributes are used If the pthread create example attributes specified by attr are modified later the thread's attributes are not pthread create tutorial affected Upon successful completion pthread create stores the ID of the created thread in the location referenced by thread Pthread create Arguments The thread is created executing start routine with arg as its sole argument If the

pthread error numbers

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