PTHREAD_CREATE(3) OpenBSD Programmer's Manual PTHREAD_CREATE(3)NAMEpthread_create - create a new thread
SYNOPSIS
#include <pthread.h>
int
pthread_create(pthread_t *thread, const pthread_attr_t *attr, 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 attributes specified by attr are
modified later, the thread's attributes are not affected. Upon
successful completion pthread_create() will store the ID of the created
thread in the location specified by thread.
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 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 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.
ERRORSpthread_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 ALSOfork(2), pthread_attr_init(3), pthread_attr_setdetachstate(3),
pthread_attr_setguardsize(3), pthread_attr_setstack(3),
pthread_attr_setstackaddr(3), pthread_attr_setstacksize(3),
pthread_cleanup_pop(3), pthread_cleanup_push(3), pthread_exit(3),
pthread_join(3)STANDARDSpthread_create() conforms to ISO/IEC 9945-1:1996 (``POSIX'').
OpenBSD 4.9 December 18, 2008 OpenBSD 4.9
