src/server/util/system.c

Wed, 26 Oct 2016 15:53:56 +0200

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Wed, 26 Oct 2016 15:53:56 +0200
changeset 118
38bf6dd8f4e7
parent 68
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child 148
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permissions
-rw-r--r--

adds minimal cgi implementation

some env vars still missing
request body not supported yet

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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 * system.c: A grab bag of system-level abstractions
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36 *
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37 * Many authors
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38 */
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39
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40 #if (defined(__GNUC__) && (__GNUC__ > 2))
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41 //include <new>
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42 //using namespace std;
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43 #else
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44 //include <new.h>
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45 #endif
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46 #include "../daemon/netsite.h"
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47 //include "ereport.h"
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48
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49 #ifdef XP_WIN32
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50 #include <windows.h>
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51 #include <process.h>
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52 #endif
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53
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54 static int thread_malloc_key = -1;
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55
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56 static char* temp_dir = NULL;
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57
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58 #ifdef XP_WIN32
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59 _PNH original_newhandler = 0;
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60 #else
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61 typedef void (newhandler)(void);
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62 static newhandler *original_newhandler = 0;
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63 #endif
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64
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65 #include "pool.h"
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66 #include "systhr.h"
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67
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68 #define MALLOC_KEY \
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69 ((pool_handle_t *)(thread_malloc_key != -1 ? systhread_getdata(thread_malloc_key) : NULL))
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70
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71
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72 #ifdef MCC_DEBUG
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73 #define DEBUG_MALLOC
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74 #endif
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75
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76 #ifdef DEBUG_MALLOC
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77
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78 /* The debug malloc routines provide several functions:
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79 *
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80 * - detect allocated memory overflow/underflow
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81 * - detect multiple frees
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82 * - intentionally clobbers malloc'd buffers
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83 * - intentionally clobbers freed buffers
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84 */
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85 #define DEBUG_MAGIC 0x12345678
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86 #define DEBUG_MARGIN 32
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87 #define DEBUG_MARGIN_CHAR '*'
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88 #define DEBUG_MALLOC_CHAR '.'
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89 #define DEBUG_FREE_CHAR 'X'
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90 #endif /* DEBUG_MALLOC */
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91
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92 NSAPI_PUBLIC char *system_version()
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93 {
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94 //return PRODUCT_ID"/"PRODUCT_VERSION_ID;
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95 return "webserver/alpha";
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96 }
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97
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98 NSAPI_PUBLIC pool_handle_t *system_pool(void)
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99 {
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100 return MALLOC_KEY;
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101 }
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102
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103 NSAPI_PUBLIC void *system_malloc(int size)
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104 {
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105 void *ret;
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106 ret = pool_malloc(MALLOC_KEY, size);
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107 if (!ret) {
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108 //ereport_outofmemory();
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109 //PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0); // TODO
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110 }
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111 return ret;
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112 }
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113
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114
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115 NSAPI_PUBLIC void *system_calloc(int size)
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116 {
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117 void *ret;
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118 ret = pool_malloc(MALLOC_KEY, size);
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119 if(ret) {
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120 ZERO(ret, size);
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121 } else {
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122 //ereport_outofmemory();
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123 //PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0); // TODO
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124 }
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125 return ret;
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126 }
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127
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128
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129 NSAPI_PUBLIC void *system_realloc(void *ptr, int size)
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130 {
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131 void *ret;
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132 ret = pool_realloc(MALLOC_KEY, ptr, size);
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133 if (!ret) {
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134 //ereport_outofmemory();
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135 //PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
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136 }
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137 return ret;
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138 }
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139
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140
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141 NSAPI_PUBLIC void system_free(void *ptr)
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142 {
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143 pool_free(MALLOC_KEY, ptr);
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144 }
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145
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146 NSAPI_PUBLIC char *system_strdup(const char *ptr)
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147 {
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148 //NS_ASSERT(ptr);
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149 char *ret;
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150 ret = pool_strdup(MALLOC_KEY, ptr);
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151 if (!ret) {
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152 //ereport_outofmemory();
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153 //PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
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154 }
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155 return ret;
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156 }
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157
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158
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159 NSAPI_PUBLIC void *system_malloc_perm(int size)
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160 {
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161 void *ret;
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162 #ifndef DEBUG_MALLOC
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163 ret = malloc(size);
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164 #else
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165 char *ptr = (char *)malloc(size + 2*DEBUG_MARGIN+2*sizeof(int));
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166 char *real_ptr;
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167 int *magic;
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168 int *length;
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169
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170 magic = (int *)ptr;
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171 *magic = DEBUG_MAGIC;
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172 ptr += sizeof(int);
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173 length = (int *)ptr;
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174 *length = size;
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175 ptr += sizeof(int);
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176 memset(ptr, DEBUG_MARGIN_CHAR, DEBUG_MARGIN);
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177 ptr += DEBUG_MARGIN;
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diff changeset
178 memset(ptr, DEBUG_MALLOC_CHAR, size);
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179 real_ptr = ptr;
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180 ptr += size;
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181 memset(ptr, DEBUG_MARGIN_CHAR, DEBUG_MARGIN);
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182
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183 ret = real_ptr;
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184 #endif
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185 if (!ret) {
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186 //ereport_outofmemory();
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187 //PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
1
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188 }
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189 return ret;
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190 }
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191
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192 NSAPI_PUBLIC void *system_calloc_perm(int size)
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193 {
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194 void *ret = system_malloc_perm(size);
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195 if(ret)
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196 ZERO(ret, size);
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197 return ret;
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198 }
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199
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200 NSAPI_PUBLIC void *system_realloc_perm(void *ptr, int size)
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201 {
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202 void *ret;
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203
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204 #ifndef DEBUG_MALLOC
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205 ret = realloc(ptr, size);
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206 #else
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207 int *magic, *length;
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208 char *baseptr;
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209 char *cptr;
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210
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211 /* realloc semantics allow realloc(NULL, size) */
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212 if (ptr == NULL)
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213 return system_malloc_perm(size);
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214
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215 cptr = (char *)ptr - DEBUG_MARGIN - 2 * sizeof(int);
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216 magic = (int *)cptr;
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diff changeset
217 if (*magic == DEBUG_MAGIC) {
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218 cptr += sizeof(int);
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219 length = (int *)cptr;
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diff changeset
220 if (*length < size) {
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parents:
diff changeset
221 char *newptr = (char *)system_malloc_perm(size);
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diff changeset
222 memcpy(newptr, ptr, *length);
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223 system_free_perm(ptr);
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diff changeset
224
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225 ret = newptr;
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226 }else {
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diff changeset
227 ret = ptr;
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diff changeset
228 }
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229 } else {
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diff changeset
230 ereport(LOG_WARN, XP_GetAdminString(DBT_systemReallocSmallerSize));
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diff changeset
231 ret = realloc(ptr, size);
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232 }
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233 #endif
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234
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parents:
diff changeset
235 if (!ret) {
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diff changeset
236 //ereport_outofmemory();
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diff changeset
237 //PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
1
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238 }
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239
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240 return ret;
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parents:
diff changeset
241 }
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242
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243 NSAPI_PUBLIC void system_free_perm(void *ptr)
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parents:
diff changeset
244 {
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diff changeset
245 #ifdef DEBUG_MALLOC
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diff changeset
246 int *length, *magic;
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diff changeset
247 char *baseptr, *cptr;
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parents:
diff changeset
248 int index;
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249
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diff changeset
250 NS_ASSERT(ptr);
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251
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252 cptr = baseptr = ((char *)ptr) - DEBUG_MARGIN - 2*sizeof(int);
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253
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diff changeset
254 magic = (int *)cptr;
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parents:
diff changeset
255 if (*magic == DEBUG_MAGIC) {
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diff changeset
256 cptr += sizeof(int);
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parents:
diff changeset
257
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diff changeset
258 length = (int *)cptr;
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diff changeset
259
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diff changeset
260 cptr += sizeof(int);
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parents:
diff changeset
261 for (index=0; index<DEBUG_MARGIN; index++)
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parents:
diff changeset
262 if (cptr[index] != DEBUG_MARGIN_CHAR) {
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parents:
diff changeset
263 ereport(LOG_CATASTROPHE, XP_GetAdminString(DBT_systemRFreeCorruptMemoryPre));
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parents:
diff changeset
264 break;
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parents:
diff changeset
265 }
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parents:
diff changeset
266
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diff changeset
267 cptr += DEBUG_MARGIN + *length;
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parents:
diff changeset
268 for (index=0; index<DEBUG_MARGIN; index++)
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parents:
diff changeset
269 if (cptr[index] != DEBUG_MARGIN_CHAR) {
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parents:
diff changeset
270 ereport(LOG_CATASTROPHE, XP_GetAdminString(DBT_systemRFreeCorruptMemoryPost));
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parents:
diff changeset
271 break;
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parents:
diff changeset
272 }
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parents:
diff changeset
273
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parents:
diff changeset
274 memset(baseptr, DEBUG_FREE_CHAR, *length + 2*DEBUG_MARGIN+sizeof(int));
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parents:
diff changeset
275 } else {
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parents:
diff changeset
276 ereport(LOG_CATASTROPHE, XP_GetAdminString(DBT_systemRFreeUnallocatedMem));
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parents:
diff changeset
277 }
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parents:
diff changeset
278 free(baseptr);
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parents:
diff changeset
279 #else
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parents:
diff changeset
280 free(ptr);
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parents:
diff changeset
281 #endif
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parents:
diff changeset
282 }
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parents:
diff changeset
283
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parents:
diff changeset
284 NSAPI_PUBLIC char *system_strdup_perm(const char *ptr)
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parents:
diff changeset
285 {
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parents:
diff changeset
286 char *ret;
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parents:
diff changeset
287
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parents:
diff changeset
288 #ifndef DEBUG_MALLOC
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parents:
diff changeset
289 //NS_ASSERT(ptr);
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diff changeset
290 ret = strdup(ptr);
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parents:
diff changeset
291 #else
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diff changeset
292 int len = strlen(ptr);
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diff changeset
293 char *nptr = (char *)system_malloc_perm(len+1);
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diff changeset
294 memcpy(nptr, ptr, len);
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diff changeset
295 nptr[len] = '\0';
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diff changeset
296 ret = nptr;
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parents:
diff changeset
297 #endif
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parents:
diff changeset
298
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parents:
diff changeset
299 if (!ret) {
3c066d52342d added source
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parents:
diff changeset
300 //ereport_outofmemory();
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1a7853a4257e removed some NSPR dependencies
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parents: 14
diff changeset
301 //PR_SetError(PR_OUT_OF_MEMORY_ERROR, 0);
1
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parents:
diff changeset
302 }
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parents:
diff changeset
303
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parents:
diff changeset
304 return ret;
3c066d52342d added source
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parents:
diff changeset
305 }
3c066d52342d added source
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parents:
diff changeset
306
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diff changeset
307 NSAPI_PUBLIC void system_set_temp_dir(const char *dir)
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parents:
diff changeset
308 {
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diff changeset
309 // Leak any previously-allocated dir in case someone still has a reference
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parents:
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310 temp_dir = STRDUP(dir);
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parents:
diff changeset
311 }
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parents:
diff changeset
312
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parents:
diff changeset
313 NSAPI_PUBLIC const char *system_get_temp_dir(void)
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parents:
diff changeset
314 {
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parents:
diff changeset
315 char* dir = temp_dir;
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parents:
diff changeset
316
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parents:
diff changeset
317 if (!dir) {
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parents:
diff changeset
318 #ifdef XP_WIN32
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parents:
diff changeset
319 dir = getenv("TEMP");
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parents:
diff changeset
320 if (!dir) dir = getenv("TMP");
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parents:
diff changeset
321 if (!dir) dir = "C:\\TEMP";
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parents:
diff changeset
322 #else
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diff changeset
323 dir = "/tmp";
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parents:
diff changeset
324 #endif
3c066d52342d added source
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parents:
diff changeset
325 }
3c066d52342d added source
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parents:
diff changeset
326
3c066d52342d added source
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parents:
diff changeset
327 return dir;
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parents:
diff changeset
328 }
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parents:
diff changeset
329
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parents:
diff changeset
330 NSAPI_PUBLIC int
3c066d52342d added source
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parents:
diff changeset
331 getThreadMallocKey(void)
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parents:
diff changeset
332 {
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parents:
diff changeset
333 return thread_malloc_key;
3c066d52342d added source
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parents:
diff changeset
334 }
3c066d52342d added source
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parents:
diff changeset
335
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parents:
diff changeset
336 NSAPI_PUBLIC void
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parents:
diff changeset
337 InitThreadMallocKey(void)
3c066d52342d added source
Olaf Wintermann <olaf.wintermann@gmail.com>
parents:
diff changeset
338 {
24
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339 // TODO
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340 //PR_NewThreadPrivateIndex((unsigned int *)&thread_malloc_key, NULL);
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341 //PR_ASSERT(thread_malloc_key);
1
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342 }
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343
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344 #ifdef XP_WIN32
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345 static int _cdecl system_newhandler(unsigned int size)
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346 {
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347 //ereport_outofmemory();
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348
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349 if (original_newhandler) {
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350 // Let original handler deal with things
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351 return (*original_newhandler)(size);
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352 }
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353
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354 // Tell new not to retry the allocation
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355 return 0;
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356 }
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357 #else
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358 static void system_newhandler()
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359 {
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360 // We want to preserve the original new semantics, but we don't know what
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361 // those semantics are. Some platforms throw xalloc while others throw
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362 // bad_alloc.
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363
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364 //ereport_outofmemory();
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365
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366 if (original_newhandler) {
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367 // Let original handler deal with things
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368 (*original_newhandler)();
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369 } else {
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370 // No original handler to call; try to remove all handlers
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371 static PRBool flagRemovedHandler = PR_FALSE;
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372 if (flagRemovedHandler) {
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373 abort();
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374 }
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375 //set_new_handler(0); // TODO: set_new_handler
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376 flagRemovedHandler = PR_TRUE;
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377 }
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378 }
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379 #endif
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380
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381 NSAPI_PUBLIC void system_setnewhandler(void)
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382 {
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383 #ifdef XP_WIN32
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384 original_newhandler = _set_new_handler(system_newhandler);
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385 #else
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386 //original_newhandler = set_new_handler(system_newhandler); // TODO: ...
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387 #endif
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388 }

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