create a new thread
() function is used to create a
new thread, with attributes specified by
, within a process. If
is NULL, the default attributes are
used. If the attributes specified by attr
modified later, the thread's attributes are not affected. Upon successful
() will store the ID of
the created thread in the location specified by
The thread is created executing start_routine
as its sole argument. If the
returns, the effect is as if
there was an implicit call to pthread_exit
using the return value of start_routine
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 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
- 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.
() 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.
() conforms to