create a new thread
*), void *arg);
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
using the return value of start_routine as the exit
status. Note that the thread in which
was originally invoked differs from this. When it returns from
main(), the effect is as if there was an implicit
using the return value of
main() as the exit
The signal state of the new thread is initialized as:
- The signal mask is inherited from the creating thread.
- The set of signals pending for the new thread is empty.
If successful, the
function will return zero. Otherwise an error number will be returned to
indicate the error.
pthread_create() will fail if:
- 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.
- The value specified by attr is invalid.
__tfork(3), 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)
pthread_create() conforms to
ISO/IEC 9945-1:1996 (“POSIX.1”).