1 /*
2 * pthread_self.c
3 *
4 * Description:
5 * This translation unit implements miscellaneous thread functions.
6 *
7 * --------------------------------------------------------------------------
8 *
9 * Pthreads-embedded (PTE) - POSIX Threads Library for embedded systems
10 * Copyright(C) 2008 Jason Schmidlapp
11 *
12 * Contact Email: jschmidlapp@users.sourceforge.net
13 *
14 *
15 * Based upon Pthreads-win32 - POSIX Threads Library for Win32
16 * Copyright(C) 1998 John E. Bossom
17 * Copyright(C) 1999,2005 Pthreads-win32 contributors
18 *
19 * Contact Email: rpj@callisto.canberra.edu.au
20 *
21 * The original list of contributors to the Pthreads-win32 project
22 * is contained in the file CONTRIBUTORS.ptw32 included with the
23 * source code distribution. The list can also be seen at the
24 * following World Wide Web location:
25 * http://sources.redhat.com/pthreads-win32/contributors.html
26 *
27 * This library is free software; you can redistribute it and/or
28 * modify it under the terms of the GNU Lesser General Public
29 * License as published by the Free Software Foundation; either
30 * version 2 of the License, or (at your option) any later version.
31 *
32 * This library is distributed in the hope that it will be useful,
33 * but WITHOUT ANY WARRANTY; without even the implied warranty of
34 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
35 * Lesser General Public License for more details.
36 *
37 * You should have received a copy of the GNU Lesser General Public
38 * License along with this library in the file COPYING.LIB;
39 * if not, write to the Free Software Foundation, Inc.,
40 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
41 */
42
43 #include <stdio.h>
44 #include <stdlib.h>
45
46 #include "pthread.h"
47 #include "implement.h"
48
49 pthread_t
pthread_self(void)50 pthread_self (void)
51 /*
52 * ------------------------------------------------------
53 * DOCPUBLIC
54 * This function returns a reference to the current running
55 * thread.
56 *
57 * PARAMETERS
58 * N/A
59 *
60 *
61 * DESCRIPTION
62 * This function returns a reference to the current running
63 * thread.
64 *
65 * RESULTS
66 * pthread_t reference to the current thread
67 *
68 * ------------------------------------------------------
69 */
70 {
71 pthread_t self;
72 pte_thread_t * sp;
73
74 sp = (pte_thread_t *) pthread_getspecific (pte_selfThreadKey);
75
76 if (sp != NULL)
77 {
78 self = sp->ptHandle;
79 }
80 else
81 {
82 /*
83 * Need to create an implicit 'self' for the currently
84 * executing thread.
85 *
86 * Note that this is a potential memory leak as there is
87 * no way to free the memory and any resources allocated
88 * by pte_new!
89 */
90 self = pte_new ();
91 sp = (pte_thread_t *) self;
92
93 if (sp != NULL)
94 {
95 /*
96 * This is a non-POSIX thread which has chosen to call
97 * a POSIX threads function for some reason. We assume that
98 * it isn't joinable, but we do assume that it's
99 * (deferred) cancelable.
100 */
101 sp->implicit = 1;
102 sp->detachState = PTHREAD_CREATE_DETACHED;
103
104 sp->threadId = pte_osThreadGetHandle();
105 /*
106 * No need to explicitly serialise access to sched_priority
107 * because the new handle is not yet public.
108 */
109 sp->sched_priority = 0;
110
111 pthread_setspecific (pte_selfThreadKey, (void *) sp);
112 }
113 }
114
115 return (self);
116
117 } /* pthread_self */
118