Mercurial > trustbridge > nss-cmake-static

annotate nspr/pr/include/private/pprthred.h @ 4:b513267f632f tip

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Build DBM module
author Andre Heinecke <andre.heinecke@intevation.de>
date Tue, 05 Aug 2014 18:58:03 +0200
parents 1e5118fa0cb1
children
rev   line source
0
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1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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2 /* This Source Code Form is subject to the terms of the Mozilla Public
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3 * License, v. 2.0. If a copy of the MPL was not distributed with this
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4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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5
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6 #ifndef pprthred_h___
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7 #define pprthred_h___
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8
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9 /*
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10 ** API for PR private functions. These calls are to be used by internal
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11 ** developers only.
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12 */
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13 #include "nspr.h"
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14
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15 #if defined(XP_OS2)
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16 #define INCL_DOS
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17 #define INCL_DOSERRORS
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18 #define INCL_WIN
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19 #include <os2.h>
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20 #endif
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21
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22 PR_BEGIN_EXTERN_C
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23
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24 /*---------------------------------------------------------------------------
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25 ** THREAD PRIVATE FUNCTIONS
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26 ---------------------------------------------------------------------------*/
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27
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28 /*
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29 ** Associate a thread object with an existing native thread.
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30 ** "type" is the type of thread object to attach
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31 ** "priority" is the priority to assign to the thread
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32 ** "stack" defines the shape of the threads stack
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33 **
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34 ** This can return NULL if some kind of error occurs, or if memory is
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35 ** tight. This call invokes "start(obj,arg)" and returns when the
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36 ** function returns. The thread object is automatically destroyed.
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37 **
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38 ** This call is not normally needed unless you create your own native
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39 ** thread. PR_Init does this automatically for the primordial thread.
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40 */
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41 NSPR_API(PRThread*) PR_AttachThread(PRThreadType type,
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42 PRThreadPriority priority,
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43 PRThreadStack *stack);
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44
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45 /*
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46 ** Detach the nspr thread from the currently executing native thread.
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47 ** The thread object will be destroyed and all related data attached
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48 ** to it. The exit procs will be invoked.
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49 **
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50 ** This call is not normally needed unless you create your own native
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51 ** thread. PR_Exit will automatially detach the nspr thread object
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52 ** created by PR_Init for the primordial thread.
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53 **
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54 ** This call returns after the nspr thread object is destroyed.
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55 */
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56 NSPR_API(void) PR_DetachThread(void);
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57
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58 /*
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59 ** Get the id of the named thread. Each thread is assigned a unique id
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60 ** when it is created or attached.
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61 */
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62 NSPR_API(PRUint32) PR_GetThreadID(PRThread *thread);
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63
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64 /*
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65 ** Set the procedure that is called when a thread is dumped. The procedure
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66 ** will be applied to the argument, arg, when called. Setting the procedure
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67 ** to NULL effectively removes it.
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68 */
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69 typedef void (*PRThreadDumpProc)(PRFileDesc *fd, PRThread *t, void *arg);
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70 NSPR_API(void) PR_SetThreadDumpProc(
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71 PRThread* thread, PRThreadDumpProc dump, void *arg);
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72
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73 /*
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74 ** Get this thread's affinity mask. The affinity mask is a 32 bit quantity
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75 ** marking a bit for each processor this process is allowed to run on.
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76 ** The processor mask is returned in the mask argument.
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77 ** The least-significant-bit represents processor 0.
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78 **
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79 ** Returns 0 on success, -1 on failure.
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80 */
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81 NSPR_API(PRInt32) PR_GetThreadAffinityMask(PRThread *thread, PRUint32 *mask);
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82
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83 /*
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84 ** Set this thread's affinity mask.
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85 **
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86 ** Returns 0 on success, -1 on failure.
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87 */
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88 NSPR_API(PRInt32) PR_SetThreadAffinityMask(PRThread *thread, PRUint32 mask );
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89
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90 /*
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91 ** Set the default CPU Affinity mask.
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92 **
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93 */
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94 NSPR_API(PRInt32) PR_SetCPUAffinityMask(PRUint32 mask);
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95
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96 /*
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97 ** Show status of all threads to standard error output.
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98 */
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99 NSPR_API(void) PR_ShowStatus(void);
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100
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101 /*
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102 ** Set thread recycle mode to on (1) or off (0)
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103 */
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104 NSPR_API(void) PR_SetThreadRecycleMode(PRUint32 flag);
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105
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106
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107 /*---------------------------------------------------------------------------
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108 ** THREAD PRIVATE FUNCTIONS FOR GARBAGE COLLECTIBLE THREADS
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109 ---------------------------------------------------------------------------*/
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110
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111 /*
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112 ** Only Garbage collectible threads participate in resume all, suspend all and
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113 ** enumeration operations. They are also different during creation when
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114 ** platform specific action may be needed (For example, all Solaris GC able
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115 ** threads are bound threads).
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116 */
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117
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118 /*
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119 ** Same as PR_CreateThread except that the thread is marked as garbage
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120 ** collectible.
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121 */
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122 NSPR_API(PRThread*) PR_CreateThreadGCAble(PRThreadType type,
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123 void (*start)(void *arg),
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124 void *arg,
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125 PRThreadPriority priority,
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126 PRThreadScope scope,
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127 PRThreadState state,
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128 PRUint32 stackSize);
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129
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130 /*
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131 ** Same as PR_AttachThread except that the thread being attached is marked as
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132 ** garbage collectible.
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133 */
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134 NSPR_API(PRThread*) PR_AttachThreadGCAble(PRThreadType type,
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135 PRThreadPriority priority,
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136 PRThreadStack *stack);
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137
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138 /*
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139 ** Mark the thread as garbage collectible.
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140 */
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141 NSPR_API(void) PR_SetThreadGCAble(void);
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142
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143 /*
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144 ** Unmark the thread as garbage collectible.
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145 */
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146 NSPR_API(void) PR_ClearThreadGCAble(void);
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147
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148 /*
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149 ** This routine prevents all other GC able threads from running. This call is needed by
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150 ** the garbage collector.
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151 */
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152 NSPR_API(void) PR_SuspendAll(void);
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153
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154 /*
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155 ** This routine unblocks all other GC able threads that were suspended from running by
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156 ** PR_SuspendAll(). This call is needed by the garbage collector.
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157 */
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158 NSPR_API(void) PR_ResumeAll(void);
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159
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160 /*
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161 ** Return the thread stack pointer of the given thread.
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162 ** Needed by the garbage collector.
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163 */
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164 NSPR_API(void *) PR_GetSP(PRThread *thread);
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165
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166 /*
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167 ** Save the registers that the GC would find interesting into the thread
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168 ** "t". isCurrent will be non-zero if the thread state that is being
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169 ** saved is the currently executing thread. Return the address of the
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170 ** first register to be scanned as well as the number of registers to
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171 ** scan in "np".
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172 **
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173 ** If "isCurrent" is non-zero then it is allowed for the thread context
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174 ** area to be used as scratch storage to hold just the registers
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175 ** necessary for scanning.
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176 **
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177 ** This function simply calls the internal function _MD_HomeGCRegisters().
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178 */
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179 NSPR_API(PRWord *) PR_GetGCRegisters(PRThread *t, int isCurrent, int *np);
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180
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181 /*
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182 ** (Get|Set)ExecutionEnvironent
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183 **
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184 ** Used by Java to associate it's execution environment so garbage collector
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185 ** can find it. If return is NULL, then it's probably not a collectable thread.
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186 **
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187 ** There's no locking required around these calls.
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188 */
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189 NSPR_API(void*) GetExecutionEnvironment(PRThread *thread);
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190 NSPR_API(void) SetExecutionEnvironment(PRThread* thread, void *environment);
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191
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192 /*
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193 ** Enumeration function that applies "func(thread,i,arg)" to each active
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194 ** thread in the process. The enumerator returns PR_SUCCESS if the enumeration
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195 ** should continue, any other value is considered failure, and enumeration
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196 ** stops, returning the failure value from PR_EnumerateThreads.
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197 ** Needed by the garbage collector.
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198 */
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199 typedef PRStatus (PR_CALLBACK *PREnumerator)(PRThread *t, int i, void *arg);
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200 NSPR_API(PRStatus) PR_EnumerateThreads(PREnumerator func, void *arg);
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201
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202 /*
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203 ** Signature of a thread stack scanning function. It is applied to every
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204 ** contiguous group of potential pointers within a thread. Count denotes the
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205 ** number of pointers.
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206 */
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207 typedef PRStatus
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208 (PR_CALLBACK *PRScanStackFun)(PRThread* t,
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209 void** baseAddr, PRUword count, void* closure);
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210
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211 /*
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212 ** Applies scanFun to all contiguous groups of potential pointers
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213 ** within a thread. This includes the stack, registers, and thread-local
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214 ** data. If scanFun returns a status value other than PR_SUCCESS the scan
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215 ** is aborted, and the status value is returned.
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216 */
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217 NSPR_API(PRStatus)
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218 PR_ThreadScanStackPointers(PRThread* t,
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219 PRScanStackFun scanFun, void* scanClosure);
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220
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221 /*
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222 ** Calls PR_ThreadScanStackPointers for every thread.
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223 */
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224 NSPR_API(PRStatus)
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225 PR_ScanStackPointers(PRScanStackFun scanFun, void* scanClosure);
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226
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227 /*
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228 ** Returns a conservative estimate on the amount of stack space left
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229 ** on a thread in bytes, sufficient for making decisions about whether
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230 ** to continue recursing or not.
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231 */
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232 NSPR_API(PRUword)
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233 PR_GetStackSpaceLeft(PRThread* t);
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234
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235 /*---------------------------------------------------------------------------
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236 ** THREAD CPU PRIVATE FUNCTIONS
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237 ---------------------------------------------------------------------------*/
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238
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239 /*
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240 ** Get a pointer to the primordial CPU.
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241 */
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242 NSPR_API(struct _PRCPU *) _PR_GetPrimordialCPU(void);
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243
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244 /*---------------------------------------------------------------------------
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245 ** THREAD SYNCHRONIZATION PRIVATE FUNCTIONS
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246 ---------------------------------------------------------------------------*/
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247
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248 /*
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249 ** Create a new named monitor (named for debugging purposes).
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250 ** Monitors are re-entrant locks with a built-in condition variable.
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251 **
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252 ** This may fail if memory is tight or if some operating system resource
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253 ** is low.
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254 */
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255 NSPR_API(PRMonitor*) PR_NewNamedMonitor(const char* name);
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256
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257 /*
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258 ** Test and then lock the lock if it's not already locked by some other
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259 ** thread. Return PR_FALSE if some other thread owned the lock at the
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260 ** time of the call.
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261 */
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262 NSPR_API(PRBool) PR_TestAndLock(PRLock *lock);
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263
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264 /*
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265 ** Test and then enter the mutex associated with the monitor if it's not
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266 ** already entered by some other thread. Return PR_FALSE if some other
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267 ** thread owned the mutex at the time of the call.
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268 */
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269 NSPR_API(PRBool) PR_TestAndEnterMonitor(PRMonitor *mon);
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270
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271 /*
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272 ** Return the number of times that the current thread has entered the
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273 ** mutex. Returns zero if the current thread has not entered the mutex.
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274 */
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275 NSPR_API(PRIntn) PR_GetMonitorEntryCount(PRMonitor *mon);
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276
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277 /*
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278 ** Just like PR_CEnterMonitor except that if the monitor is owned by
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279 ** another thread NULL is returned.
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280 */
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281 NSPR_API(PRMonitor*) PR_CTestAndEnterMonitor(void *address);
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282
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283 /*---------------------------------------------------------------------------
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284 ** PLATFORM-SPECIFIC INITIALIZATION FUNCTIONS
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285 ---------------------------------------------------------------------------*/
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286 #if defined(IRIX)
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287 /*
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288 ** Irix specific initialization funtion to be called before PR_Init
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289 ** is called by the application. Sets the CONF_INITUSERS and CONF_INITSIZE
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290 ** attributes of the shared arena set up by nspr.
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291 **
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292 ** The environment variables _NSPR_IRIX_INITUSERS and _NSPR_IRIX_INITSIZE
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293 ** can also be used to set these arena attributes. If _NSPR_IRIX_INITUSERS
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294 ** is set, but not _NSPR_IRIX_INITSIZE, the value of the CONF_INITSIZE
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295 ** attribute of the nspr arena is scaled as a function of the
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296 ** _NSPR_IRIX_INITUSERS value.
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297 **
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298 ** If the _PR_Irix_Set_Arena_Params() is called in addition to setting the
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299 ** environment variables, the values of the environment variables are used.
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300 **
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301 */
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302 NSPR_API(void) _PR_Irix_Set_Arena_Params(PRInt32 initusers, PRInt32 initsize);
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303
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304 #endif /* IRIX */
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305
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306 #if defined(XP_OS2)
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307 /*
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308 ** These functions need to be called at the start and end of a thread.
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309 ** An EXCEPTIONREGISTRATIONRECORD must be declared on the stack and its
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310 ** address passed to the two functions.
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311 */
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312 NSPR_API(void) PR_OS2_SetFloatExcpHandler(EXCEPTIONREGISTRATIONRECORD* e);
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313 NSPR_API(void) PR_OS2_UnsetFloatExcpHandler(EXCEPTIONREGISTRATIONRECORD* e);
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314 #endif /* XP_OS2 */
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315
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316 /* I think PR_GetMonitorEntryCount is useless. All you really want is this... */
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317 #define PR_InMonitor(m) (PR_GetMonitorEntryCount(m) > 0)
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318
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319 /*---------------------------------------------------------------------------
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320 ** Special X-Lock hack for client
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321 ---------------------------------------------------------------------------*/
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322
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323 #ifdef XP_UNIX
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324 extern void PR_XLock(void);
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325 extern void PR_XUnlock(void);
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326 extern PRBool PR_XIsLocked(void);
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327 #endif /* XP_UNIX */
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328
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329 PR_END_EXTERN_C
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330
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331 #endif /* pprthred_h___ */
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