1 /*
2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
3 *
4 * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
5 *
6 * THE BSD LICENSE
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions are met:
10 *
11 * Redistributions of source code must retain the above copyright notice, this
12 * list of conditions and the following disclaimer.
13 * Redistributions in binary form must reproduce the above copyright notice,
14 * this list of conditions and the following disclaimer in the documentation
15 * and/or other materials provided with the distribution.
16 *
17 * Neither the name of the nor the names of its contributors may be
18 * used to endorse or promote products derived from this software without
19 * specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
25 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
26 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
27 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
28 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
29 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
30 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
31 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 */
33
34 /*
35 * systhr.c: Abstracted threading mechanisms
36 *
37 * Rob McCool
38 */
39
40
41 #include "systhr.h"
42 //include "ereport.h"
43
44 //include "prinit.h"
45 //include "prthread.h"
46 //include "private/pprthred.h"
47
48 #include "systems.h"
49
50 #ifdef XP_UNIX
51 #include <poll.h>
52 #endif
53
54 #define DEFAULT_STACKSIZE (64*1024)
55
56 static unsigned long _systhr_stacksize = DEFAULT_STACKSIZE;
57
58 NSAPI_PUBLIC
59 void systhread_set_default_stacksize(unsigned long size)
60 {
61 _systhr_stacksize = size;
62 }
63
64
65
66 SYS_THREAD systhread_start(int prio, int stksz, thrstartfunc fn, void *arg) {
67 pthread_t thr = 0;
68 pthread_attr_t attr;
69
70 pthread_attr_init(&attr);
71 if(stksz) {
72 pthread_attr_setstacksize(&attr, stksz);
73 }
74
75 if(pthread_create(&thr, &attr, (posix_thrstartfunc)fn, arg) != 0) {
76 /* error */
77 }
78
79 return thr;
80 }
81
82 SYS_THREAD systhread_current(void) {
83 return pthread_self();
84 }
85
86 void systhread_yield(void) {
87 sched_yield();
88 }
89
90
91 void systhread_timerset(int usec) {
92
93 }
94
95 SYS_THREAD systhread_attach(void) {
96 /* TODO: what to do? */
97 return 0;
98 }
99
100 void systhread_detach(SYS_THREAD thr) {
101 pthread_detach(thr);
102 }
103
104 void systhread_terminate(SYS_THREAD thr) {
105 //PR_Interrupt((PRThread *)thr);
106 }
107
108 void systhread_sleep(int msec) {
109 if(msec > 0) {
110 poll(NULL, 0, msec);
111 } else {
112 sched_yield();
113 }
114 }
115
116 NSAPI_PUBLIC int systhread_newkey() {
117 pthread_key_t key;
118 pthread_key_create(&key, NULL);
119
120 return (int)key; // TODO: don't use int
121 }
122
123 NSAPI_PUBLIC void* systhread_getdata(int key) {
124 return pthread_getspecific((pthread_key_t)key);
125 }
126
127 NSAPI_PUBLIC void systhread_setdata(int key, void *data) {
128 pthread_setspecific((pthread_key_t)key, data);
129 }
130
131 NSAPI_PUBLIC void systhread_init(char *name)
132 {
133 //if (!PR_Initialized()) {
134 // PR_Init(PR_USER_THREAD, PR_PRIORITY_NORMAL, 256);
135 //}
136 // XXX: ruslan - this bug can potentially exist on all plafroms due to
137 // possible priority inversion on NSPR spin locks. This code will
138 // need to be remove as we get new NSPR drop
139 // <WORKAROUND>
140 /* VB: This is to fix bug# 364813 coupled with NSPR not wanting to patch
141 their problems. The fix is to prevent NSPR itself from
142 using atomic stacks.
143 */
144 // ruslan: this problem exists on DEC also. We will roll it back when
145 // we have the right fix from NSPR group. It has smth. to do with
146 // atomic operations on DEC, it's an assembly code which is different
147 // for every platform. NSPR_FD_CACHE_SIZE_HIGH env var will cause the
148 // same effect as this fix. Debug version of NSPR always works as it doesn't
149 // have FD stack.
150
151 //int maxPRFdCache = 8192;
152 //PR_SetFDCacheSize(0, maxPRFdCache);
153 // </WORKAROUND>
154 }
155
156 NSAPI_PUBLIC void systhread_dummy(void) {
157 }
158