src/server/util/systhr.c

Sun, 08 Sep 2013 23:27:07 +0200

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Sun, 08 Sep 2013 23:27:07 +0200
changeset 91
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parent 41
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child 161
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permissions
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ucx update

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

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