hi all,
my requirement is to create a thread by calling another function.
i.e i dont call pthread_create directly from main, but by calling another function (createThd - below ), from main.
Example:
this creates the thread but doesnt run it, thread terminates as soon as the function createThd() returns.
is there a way to overcome this problem.
any help is appreciated, thankx in advanced.
wolwy.
Hi,
You could wait on createThd() until thread_function() has done his job by means of pthread_cond_wait/pthread_cond_signal & mutexes, just like a parent process would wait (with wait/waitpid) for its child to terminate...
Hello,
J create a thread C with a JNI function via JAVA.
J have the following message (but not in each time):
Someone has an idea ?
Thank.
Unexpected Signal : 4 occurred at PC=0x78C103E0
Function=
Library=(N/A)
NOTE: We are unable to locate the function name... (0 Replies)
I have two string returning function in ESQL/C
char *segment_name(lbuffer)
char *lbuffer;
{.....
and
char *get_bpdvalue(f_name)
char *f_name;
{......
both declared above main()
char *get_bpdvalue();
char *segment_name();
my problem is segment_name works on sprintf and strcpy... (5 Replies)
Hi all,
I am very new to BASH shell programming. I need to return an integer from a function to the caller function. I did this:
but it keeps giving me wrong return:
Can someone help me out here, please?
Thanks (2 Replies)
hi
how can I return multiple values from a C function. I tried the following:
#include <stdio.h>
void foo(int id, char *first_name, char *last_name)
{
/*
this is just an example to illustrate my problem... real code makes
use of the "id" parameter.
*/
first_name = (char... (8 Replies)
Hi All
In my script, I can call on several functions. I have a logging function that is called by any of these functions. What I would like is some way of identifying which function I am using and pass this to the log function as some parameter.
Is there some built in command or way of... (3 Replies)
I am working on a C/Unix application from last 2 years which communicates with other systems using proprietary format of my client. We have a function written in C which returns integer, which is response from other system to the request message initiated by my system. This return value is then... (1 Reply)
I am working on the application in which I have to fetch values from the database and paste in url and send it to portal.
table=get_result("SELECT serialno,cas,Mode,FLC,TLC,location,CompName,CompCode,FG,FC,DispNo,TruckNo,LWbill,RRGPN,INVNO,DCN,RQTY,DQTY,SQTY,DDATE,RDATE,SDATE,TTIME FROM... (1 Reply)
Hi,
If I have a code like this, what are the potential problems do you see?
const char* const retString() {
return "hello"; /* string literal */
}
My questions are:
a) Since the string literal which is already a constant read only data (cannot be... (4 Replies)
Hi All,
I am using malloc function for allocating dynamic memory.
When I am using below code on Linux server its working fine, but When I am trying the same code on HP UNIX server its returning NULL.
below is a fragment of code in which it is giving problem.
tmp = (format_tree... (4 Replies)
Discussion started by: Taher Saifuddin
4 Replies
LEARN ABOUT OSX
pthread_create
PTHREAD_CREATE(3) BSD Library Functions Manual PTHREAD_CREATE(3)NAME
pthread_create -- create a new thread
SYNOPSIS
#include <pthread.h>
int
pthread_create(pthread_t *restrict thread, const pthread_attr_t *restrict attr, void *(*start_routine)(void *), void *restrict 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 attributes specified by attr are modified later, the thread's attributes are not affected. Upon suc-
cessful completion, pthread_create() will store the ID of the created thread in the location specified by thread.
Upon its creation, the thread executes start_routine, with arg as its sole argument. If start_routine returns, the effect is as if there was
an implicit call to pthread_exit(), using the 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.
Upon thread exit the storage for the thread must be reclaimed by another thread via a call to pthread_join(). Alternatively,
pthread_detach() may be called on the thread to indicate that the system may automatically reclaim the thread storage upon exit. The
pthread_attr_setdetachstate() function may be used on the attr argument passed to pthread_create() in order to achieve the same effect as a
call to pthread_detach() on the newly created thread.
The signal state of the new thread is initialized as:
o The signal mask is inherited from the creating thread.
o The set of signals pending for the new thread is empty.
RETURN VALUES
If successful, the pthread_create() function will return zero. Otherwise, an error number will be returned to indicate the error.
ERRORS
pthread_create() 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.
SEE ALSO fork(2), pthread_cleanup_pop(3), pthread_cleanup_push(3), pthread_detach(3), pthread_exit(3), pthread_join(3)STANDARDS
pthread_create() conforms to ISO/IEC 9945-1:1996 (``POSIX.1'').
BSD April 4, 1996 BSD