1.\" Copyright (c) 1996 John Birrell <jb@cimlogic.com.au>. 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. --- 14 unchanged lines hidden (view full) --- 23.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29.\" SUCH DAMAGE. 30.\" |
31.\" $FreeBSD: head/share/man/man3/pthread_create.3 57686 2000-03-02 09:14:21Z sheldonh $ |
32.\" 33.Dd April 4, 1996 34.Dt PTHREAD_CREATE 3 35.Os BSD 4 36.Sh NAME 37.Nm pthread_create 38.Nd create a new thread 39.Sh SYNOPSIS 40.Fd #include <pthread.h> 41.Ft int 42.Fn pthread_create "pthread_t *thread" "const pthread_attr_t *attr" "void *(*start_routine)(void *)" "void *arg" 43.Sh DESCRIPTION 44The 45.Fn pthread_create 46function is used to create a new thread, with attributes specified by 47.Fa attr , |
48within a process. 49If |
50.Fa attr |
51is NULL, the default attributes are used. 52If the attributes specified by |
53.Fa attr |
54are modified later, the thread's attributes are not affected. 55Upon |
56successful completion 57.Fn pthread_create 58will store the ID of the created thread in the location specified by 59.Fa thread . 60.Pp 61The thread is created executing 62.Fa start_routine 63with 64.Fa arg |
65as its sole argument. 66If the |
67.Fa start_routine 68returns, the effect is as if there was an implicit call to 69.Fn pthread_exit 70using the return value of 71.Fa start_routine |
72as the exit status. 73Note that the thread in which |
74.Fn main |
75was originally invoked differs from this. 76When it returns from |
77.Fn main , 78the effect is as if there was an implicit call to 79.Fn exit 80using the return value of 81.Fn main 82as the exit status. 83.Pp 84The signal state of the new thread is initialized as: 85.Bl -bullet -offset indent 86.It 87The signal mask is inherited from the creating thread. 88.It 89The set of signals pending for the new thread is empty. 90.El 91.Sh RETURN VALUES 92If successful, the 93.Fn pthread_create |
94function will return zero. 95Otherwise an error number will be returned to |
96indicate the error. 97.Sh ERRORS 98.Fn pthread_create 99will fail if: 100.Bl -tag -width Er 101.It Bq Er EAGAIN 102The system lacked the necessary resources to create another thread, or 103the system-imposed limit on the total number of threads in a process --- 18 unchanged lines hidden --- |