PTHREAD_CREATE(3) BSD Library Functions Manual PTHREAD_CREATE(3)NAMEpthread_create — create a new thread
POSIX Threads Library (libpthread, -lpthread)
pthread_create(pthread_t *thread, const pthread_attr_t *attr,
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 success‐
ful 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 argu‐
ment. 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:
· The signal mask is inherited from the creating thread.
· The set of signals pending for the new thread is empty.
If successful, the pthread_create() function will return zero. Otherwise
an error number will be returned to indicate the error.
The pthread_create() function 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.
[EPERM] The caller does not have appropriate permission to set
the required scheduling parameters or scheduling pol‐
[EINVAL] The value specified by attr is invalid.
SEE ALSOfork(2), pthread_attr(3), pthread_cleanup_pop(3),
pthread_cleanup_push(3), pthread_exit(3), pthread_join(3)STANDARDS
The pthread_create() function conforms to ISO/IEC 9945-1:1996
BSD November 4, 2006 BSD