Mercurial > trustbridge > nss-cmake-static

annotate nss/lib/util/nssilckt.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 /* This Source Code Form is subject to the terms of the Mozilla Public
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2 * License, v. 2.0. If a copy of the MPL was not distributed with this
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3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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4
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5 /*
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6 ** nssilock.h - Instrumented locking functions for NSS
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7 **
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8 ** Description:
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9 ** nssilock provides instrumentation for locks and monitors in
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10 ** the NSS libraries. The instrumentation, when enabled, causes
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11 ** each call to the instrumented function to record data about
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12 ** the call to an external file. The external file
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13 ** subsequently used to extract performance data and other
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14 ** statistical information about the operation of locks used in
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15 ** the nss library.
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16 **
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17 ** To enable compilation with instrumentation, build NSS with
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18 ** the compile time switch NEED_NSS_ILOCK defined.
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19 **
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20 ** say: "gmake OS_CFLAGS+=-DNEED_NSS_ILOCK" at make time.
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21 **
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22 ** At runtime, to enable recording from nssilock, one or more
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23 ** environment variables must be set. For each nssILockType to
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24 ** be recorded, an environment variable of the form NSS_ILOCK_x
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25 ** must be set to 1. For example:
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26 **
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27 ** set NSS_ILOCK_Cert=1
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28 **
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29 ** nssilock uses PRLOG is used to record to trace data. The
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30 ** PRLogModule name associated with nssilock data is: "nssilock".
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31 ** To enable recording of nssilock data you will need to set the
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32 ** environment variable NSPR_LOG_MODULES to enable
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33 ** recording for the nssilock log module. Similarly, you will
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34 ** need to set the environment variable NSPR_LOG_FILE to specify
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35 ** the filename to receive the recorded data. See prlog.h for usage.
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36 ** Example:
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37 **
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38 ** export NSPR_LOG_MODULES=nssilock:6
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39 ** export NSPR_LOG_FILE=xxxLogfile
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40 **
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41 ** Operation:
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42 ** nssilock wraps calls to NSPR's PZLock and PZMonitor functions
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43 ** with similarly named functions: PZ_NewLock(), etc. When NSS is
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44 ** built with lock instrumentation enabled, the PZ* functions are
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45 ** compiled into NSS; when lock instrumentation is disabled,
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46 ** calls to PZ* functions are directly mapped to PR* functions
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47 ** and the instrumentation arguments to the PZ* functions are
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48 ** compiled away.
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49 **
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50 **
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51 ** File Format:
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52 ** The format of the external file is implementation
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53 ** dependent. Where NSPR's PR_LOG() function is used, the file
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54 ** contains data defined for PR_LOG() plus the data written by
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55 ** the wrapped function. On some platforms and under some
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56 ** circumstances, platform dependent logging or
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57 ** instrumentation probes may be used. In any case, the
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58 ** relevant data provided by the lock instrumentation is:
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59 **
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60 ** lockType, func, address, duration, line, file [heldTime]
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61 **
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62 ** where:
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63 **
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64 ** lockType: a character representation of nssILockType for the
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65 ** call. e.g. ... "cert"
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66 **
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67 ** func: the function doing the tracing. e.g. "NewLock"
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68 **
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69 ** address: address of the instrumented lock or monitor
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70 **
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71 ** duration: is how long was spent in the instrumented function,
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72 ** in PRIntervalTime "ticks".
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73 **
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74 ** line: the line number within the calling function
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75 **
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76 ** file: the file from which the call was made
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77 **
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78 ** heldTime: how long the lock/monitor was held. field
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79 ** present only for PZ_Unlock() and PZ_ExitMonitor().
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80 **
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81 ** Design Notes:
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82 ** The design for lock instrumentation was influenced by the
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83 ** need to gather performance data on NSS 3.x. It is intended
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84 ** that the effort to modify NSS to use lock instrumentation
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85 ** be minimized. Existing calls to locking functions need only
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86 ** have their names changed to the instrumentation function
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87 ** names.
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88 **
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89 ** Private NSS Interface:
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90 ** nssilock.h defines a private interface for use by NSS.
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91 ** nssilock.h is experimental in nature and is subject to
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92 ** change or revocation without notice. ... Don't mess with
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93 ** it.
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94 **
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95 */
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96
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97 /*
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98 * $Id:
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99 */
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100
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101 #ifndef _NSSILCKT_H_
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102 #define _NSSILCKT_H_
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103
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104 #include "utilrename.h"
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105 #include "prtypes.h"
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106 #include "prmon.h"
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107 #include "prlock.h"
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108 #include "prcvar.h"
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109
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110 typedef enum {
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111 nssILockArena = 0,
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112 nssILockSession = 1,
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113 nssILockObject = 2,
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114 nssILockRefLock = 3,
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115 nssILockCert = 4,
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116 nssILockCertDB = 5,
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117 nssILockDBM = 6,
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118 nssILockCache = 7,
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119 nssILockSSL = 8,
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120 nssILockList = 9,
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121 nssILockSlot = 10,
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122 nssILockFreelist = 11,
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123 nssILockOID = 12,
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124 nssILockAttribute = 13,
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125 nssILockPK11cxt = 14, /* pk11context */
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126 nssILockRWLock = 15,
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127 nssILockOther = 16,
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128 nssILockSelfServ = 17,
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129 nssILockKeyDB = 18,
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130 nssILockLast /* don't use this one! */
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131 } nssILockType;
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132
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133 /*
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134 ** conditionally compile in nssilock features
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135 */
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136 #if defined(NEED_NSS_ILOCK)
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137
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138 /*
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139 ** Declare operation type enumerator
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140 ** enumerations identify the function being performed
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141 */
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142 typedef enum {
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143 FlushTT = 0,
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144 NewLock = 1,
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145 Lock = 2,
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146 Unlock = 3,
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147 DestroyLock = 4,
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148 NewCondVar = 5,
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149 WaitCondVar = 6,
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150 NotifyCondVar = 7,
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151 NotifyAllCondVar = 8,
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152 DestroyCondVar = 9,
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153 NewMonitor = 10,
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154 EnterMonitor = 11,
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155 ExitMonitor = 12,
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156 Notify = 13,
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157 NotifyAll = 14,
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158 Wait = 15,
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159 DestroyMonitor = 16
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160 } nssILockOp;
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161
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162 /*
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163 ** Declare the trace record
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164 */
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165 struct pzTrace_s {
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166 PRUint32 threadID; /* PR_GetThreadID() */
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167 nssILockOp op; /* operation being performed */
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168 nssILockType ltype; /* lock type identifier */
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169 PRIntervalTime callTime; /* time spent in function */
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170 PRIntervalTime heldTime; /* lock held time, or -1 */
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171 void *lock; /* address of lock structure */
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172 PRIntn line; /* line number */
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173 char file[24]; /* filename */
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174 };
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175
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176 /*
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177 ** declare opaque types. See: nssilock.c
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178 */
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179 typedef struct pzlock_s PZLock;
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180 typedef struct pzcondvar_s PZCondVar;
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181 typedef struct pzmonitor_s PZMonitor;
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182
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183 #else /* NEED_NSS_ILOCK */
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184
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185 #define PZLock PRLock
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186 #define PZCondVar PRCondVar
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187 #define PZMonitor PRMonitor
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188
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189 #endif /* NEED_NSS_ILOCK */
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190
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191 #endif /* _NSSILCKT_H_ */
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