pthread_create - create a new thread
pthread_create(pthread_t *thread, const pthread_attr_t
void *(*start_routine)(void *), void *arg);
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
completion pthread_create() will store the ID of the created
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
the exit status. Note that the thread in which main() was
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
+o The set of signals pending for the new thread is
If successful, the pthread_create() function will return zero. Otherwise
an error number will be returned to indicate the error.
pthread_create() will fail if:
[EAGAIN] The system lacked the necessary resources to
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.
fork(2), pthread_attr_init(3), pthread_attr_setdetachstate(3),
pthread_cleanup_pop(3), pthread_cleanup_push(3), pthread_exit(3),
pthread_create() conforms to ISO/IEC 9945-1:1996
OpenBSD 3.6 April 4, 1996
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