01-13-2006
oops sorry, I hadnt uploaded the correct program, on the same page look for thread.C
hope this helps
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1. Programming
Here is simple code for multithreading in POSIX:
void* simplethread(void* arg)
{
printf("Hello World\n");
}
int main(void)
{
pthread_t id;
pthread_create(&id, NULL, simplethread, NULL);
return 0;
}
Whether the new thread will run or not depends on the OS. Tricky ... (5 Replies)
Discussion started by: _rocky
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2. Programming
how to do with that?
after cc -o xxxx xxxx.c
ld:
Unresolved:
_pthread_create
_pthread_deteach
_pthread_exit
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3. Programming
Hello
My problem goes like this:
I have used Pthread_create, and I have tryed to create 2 proccess but nothing happens! It does not even matter what the function im trying to create do. It is if im trying to activate an empty function. This is my code.
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4. Solaris
Im trying to run an application i compiled (iperf) and i get an error telling me that it cant create the pthread. when i ran the ./configuration one of the things it checked was for pthreads which came back ok.
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5. Programming
I try to compile a sample c code in fedora eclipse 3.2 as managed makefile using pthread library,it shows some error on pthread functions.Error is of undefined reference to pthread.Anybody guide me to solve this problem.
Thanking you (1 Reply)
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6. Programming
Hi guys.
H was learning posix threads in C with anjuta IDE. it gives me
undefined reference to `pthread_create'
I know i should compile it like:
gcc -lpthread main.c
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7. Programming
The prototype for pthread_create function is like this:-
int pthread_create(pthread_t *thread,pthread_attr_t *attr,void *(*start routine),void *arg);
Q.1 .Why the return type of the start_routine must be void*??
Q.2. Why should we pass arg by converting into void * only ??
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8. UNIX for Dummies Questions & Answers
Hi,
I'm trying to do my homework assignment but I am having trouble using the pthread_create fucntion.
Here is my code________________
//Alicia Johnson
//sum_pid program
//creates n number of threads. These threads create a random number
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9. Programming
Suppose I have a simple program main() with a global varibale int x=0.
int x = 0;
main()
{
print("%d\n",x);
}
I want to create two threads/process which must access this variable x in sync.
Which one will be better threads( pthread_create ) or process( fork )?
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LEARN ABOUT OSX
pthread_attr_set_getdetachstate
PTHREAD_ATTR(3) BSD Library Functions Manual PTHREAD_ATTR(3)
NAME
pthread_attr_getdetachstate, pthread_attr_setdetachstate -- thread attribute operations
SYNOPSIS
#include <pthread.h>
int
pthread_attr_getdetachstate(const pthread_attr_t *attr, int *detachstate);
int
pthread_attr_setdetachstate(pthread_attr_t *attr, int detachstate);
DESCRIPTION
Thread attributes are used to specify parameters to pthread_create(). One attribute object can be used in multiple calls to
pthread_create(), with or without modifications between calls.
One of these thread attributes governs the creation state of the new thread. The new thread can be either created "detached" or "joinable".
The constants corresponding to these states are PTHREAD_CREATE_DETACHED and PTHREAD_CREATE_JOINABLE respectively. Creating a "joinable"
thread allows the user to call pthread_join() and pthread_detach(), with the new thread's ID. A "detached" thread's ID cannot be used with
pthread_join() and pthread_detach(). The default value for the "detachstate" attribute is PTHREAD_CREATE_JOINABLE.
The pthread_attr_setdetachstate() function sets the thread's "detachstate" attribute.
The "detachstate" attribute is set within the attr argument, which can subsequently be used as an argument to pthread_create().
RETURN VALUES
If successful, these functions return 0. Otherwise, an error number is returned to indicate the error. pthread_attr_getdetachstate(), on
success, will copy the value of the thread's "detachstate" attribute to the location pointed to by the second function parameter.
ERRORS
pthread_attr_getdetachstate() will fail if:
[EINVAL] Invalid value for attr
pthread_attr_setdetachstate() will fail if:
[EINVAL] Invalid value for attr or detachstate.
SEE ALSO
pthread_create(3), pthread_join(3), pthread_attr_init(3), pthread_detach(3)
STANDARDS
pthread_attr_setdetachstate(), pthread_attr_getdetachstate() conform to ISO/IEC 9945-1:1996 (``POSIX.1'')
BSD
December 31, 2007 BSD