author | Jan Vrany <jan.vrany@fit.cvut.cz> |
Thu, 27 Sep 2018 23:09:30 +0100 | |
changeset 3854 | 193b04caef42 |
parent 3784 | b0c56287a058 |
permissions | -rw-r--r-- |
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COPYRIGHT (c) 1996-2015 by Claus Gittinger |
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New code and modifications done at SWING Research Group [1]: |
fa7400d022a0
Updated to https://swing.fit.cvut.cz/hg/stx.libjava/rev/31f8b995905e
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COPYRIGHT (c) 2010-2015 by Jan Vrany, Jan Kurs and Marcel Hlopko |
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SWING Research Group, Czech Technical University in Prague |
fa7400d022a0
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This software is furnished under a license and may be used |
fa7400d022a0
Updated to https://swing.fit.cvut.cz/hg/stx.libjava/rev/31f8b995905e
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parents:
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only in accordance with the terms of that license and with the |
fa7400d022a0
Updated to https://swing.fit.cvut.cz/hg/stx.libjava/rev/31f8b995905e
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
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inclusion of the above copyright notice. This software may not |
fa7400d022a0
Updated to https://swing.fit.cvut.cz/hg/stx.libjava/rev/31f8b995905e
Jan Vrany <jan.vrany@fit.cvut.cz>
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be provided or otherwise made available to, or used by, any |
fa7400d022a0
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other person. No title to or ownership of the software is |
fa7400d022a0
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hereby transferred. |
fa7400d022a0
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[1] Code written at SWING Research Group contains a signature |
fa7400d022a0
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of one of the above copright owners. For exact set of such code, |
fa7400d022a0
Updated to https://swing.fit.cvut.cz/hg/stx.libjava/rev/31f8b995905e
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parents:
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see the differences between this version and version stx:libjava |
fa7400d022a0
Updated to https://swing.fit.cvut.cz/hg/stx.libjava/rev/31f8b995905e
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as of 1.9.2010 |
fa7400d022a0
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" |
fa7400d022a0
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"{ Package: 'stx:libjava' }" |
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"{ NameSpace: Smalltalk }" |
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AbstractLock subclass:#JavaMonitor |
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instanceVariableNames:'waitingSema waitEnabled ownerPrintString' |
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classVariableNames:'' |
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poolDictionaries:'' |
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category:'Languages-Java-Support' |
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! |
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!JavaMonitor class methodsFor:'documentation'! |
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copyright |
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" |
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COPYRIGHT (c) 1996-2015 by Claus Gittinger |
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New code and modifications done at SWING Research Group [1]: |
fa7400d022a0
Updated to https://swing.fit.cvut.cz/hg/stx.libjava/rev/31f8b995905e
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COPYRIGHT (c) 2010-2015 by Jan Vrany, Jan Kurs and Marcel Hlopko |
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SWING Research Group, Czech Technical University in Prague |
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This software is furnished under a license and may be used |
fa7400d022a0
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only in accordance with the terms of that license and with the |
fa7400d022a0
Updated to https://swing.fit.cvut.cz/hg/stx.libjava/rev/31f8b995905e
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
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inclusion of the above copyright notice. This software may not |
fa7400d022a0
Updated to https://swing.fit.cvut.cz/hg/stx.libjava/rev/31f8b995905e
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
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be provided or otherwise made available to, or used by, any |
fa7400d022a0
Updated to https://swing.fit.cvut.cz/hg/stx.libjava/rev/31f8b995905e
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
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other person. No title to or ownership of the software is |
fa7400d022a0
Updated to https://swing.fit.cvut.cz/hg/stx.libjava/rev/31f8b995905e
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hereby transferred. |
fa7400d022a0
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[1] Code written at SWING Research Group contains a signature |
fa7400d022a0
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of one of the above copright owners. For exact set of such code, |
fa7400d022a0
Updated to https://swing.fit.cvut.cz/hg/stx.libjava/rev/31f8b995905e
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see the differences between this version and version stx:libjava |
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as of 1.9.2010 |
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" |
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! ! |
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!JavaMonitor class methodsFor:'instance creation'! |
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for: owningObject |
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^ self basicNew initializeFor: owningObject. |
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"Created: / 30-11-2011 / 20:39:55 / Marcel Hlopko <hlopkmar@fel.cvut.cz>" |
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! |
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for: owningObject thread: threadOrNil nestedLockCount: count |
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^ self basicNew initializeFor: owningObject thread: threadOrNil nestedLockCount: count |
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"Created: / 26-08-2012 / 17:01:43 / Jan Vrany <jan.vrany@fit.cvut.cz>" |
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! ! |
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!JavaMonitor methodsFor:'accessing'! |
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count |
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^ count |
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! |
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owningProcess |
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"Return the process that has acquired (entered) the receiver or |
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nil if no process currently has the monitor." |
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^ process |
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"Created: / 12-08-2017 / 23:11:44 / Jan Vrany <jan.vrany@fit.cvut.cz>" |
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! |
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processesEntered |
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"Return a alist of processes that entered the monitor. For testing / debugging purposes only!!" |
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^ process isNil |
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ifTrue:[ #() ] |
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ifFalse:[ (Array with: process) , sema waitingProcesses ] |
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94 |
"Created: / 20-11-2011 / 13:22:15 / Marcel Hlopko <hlopkmar@fel.cvut.cz>" |
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95 |
"Modified (format): / 03-06-2017 / 23:10:31 / Jan Vrany <jan.vrany@fit.cvut.cz>" |
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96 |
! ! |
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97 |
|
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98 |
!JavaMonitor methodsFor:'atomic'! |
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99 |
|
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100 |
disableWait |
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101 |
JavaVM monitorTrace ifTrue:[ |
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102 |
Logger log: ('Waiting is disabled on monitor for %1' bindWith: ownerPrintString) severity:Logger severityDEBUG facility:#JVM. |
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103 |
]. |
3773 | 104 |
"/ critical region not needed here |
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105 |
"/ self instVarAccessCritical: [ waitEnabled := false ]. |
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waitEnabled := false. |
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107 |
|
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108 |
"Created: / 30-11-2011 / 20:34:40 / Marcel Hlopko <hlopkmar@fel.cvut.cz>" |
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109 |
"Modified: / 02-03-2015 / 14:06:51 / Jan Vrany <jan.vrany@fit.cvut.cz>" |
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110 |
! |
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111 |
|
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112 |
enableWait |
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"/ critical region not needed here |
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114 |
"/ self instVarAccessCritical: [waitEnabled := true]. |
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waitEnabled := true |
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116 |
|
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117 |
"Created: / 30-11-2011 / 20:34:31 / Marcel Hlopko <hlopkmar@fel.cvut.cz>" |
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118 |
"Modified (format): / 11-10-2013 / 11:17:58 / Jan Vrany <jan.vrany@fit.cvut.cz>" |
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119 |
! |
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120 |
|
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121 |
waitEnabled |
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"/ critical region not needed here |
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123 |
"/ self instVarAccessCritical: [ ^ waitEnabled]. |
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^ waitEnabled. |
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125 |
|
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126 |
"Created: / 30-11-2011 / 20:34:56 / Marcel Hlopko <hlopkmar@fel.cvut.cz>" |
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127 |
! ! |
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128 |
|
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129 |
!JavaMonitor methodsFor:'initialization'! |
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130 |
|
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131 |
initializeFor: owningObject |
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132 |
self initializeFor: owningObject thread: 0 nestedLockCount: 0. |
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133 |
|
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134 |
"Created: / 30-11-2011 / 20:39:31 / Marcel Hlopko <hlopkmar@fel.cvut.cz>" |
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135 |
"Modified: / 26-08-2012 / 17:25:55 / Jan Vrany <jan.vrany@fit.cvut.cz>" |
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136 |
! |
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137 |
|
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138 |
initializeFor:owningObject thread:threadId nestedLockCount:cnt |
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139 |
|
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140 |
"/ self assert: (owningObject isJavaObject or:[owningObject isJavaClass]). |
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141 |
|
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142 |
waitEnabled := true. |
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143 |
waitingSema := Semaphore new:0. |
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144 |
ownerPrintString := owningObject class name , '@' , owningObject identityHash printString. |
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145 |
|
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146 |
"/Not locked... |
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147 |
threadId == 0 ifTrue:[ |
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148 |
sema := Semaphore new:1. |
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149 |
count := 0. |
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150 |
^self. |
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151 |
] ifFalse: [ |
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152 |
"threadId is not zero (zero is threadId of scheduler process, which will never try to acquire the monitor)" |
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153 |
"so it means it is possible that the thin lock is already locked for other thread, we must be careful " |
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154 |
|
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155 |
process := ObjectMemory processesKnownInVM detect:[:p|p id == threadId] ifNone:[nil]. |
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156 |
self assert: process notNil. |
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|
157 |
cnt timesRepeat:[ |
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158 |
"/ JavaVM enteredMonitorsOf: owningProcess add: owningObject. |
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159 |
"/ JavaVM acquiredMonitorsOf: owningProcess add: owningObject. |
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160 |
]. |
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sema := Semaphore new: 0. |
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162 |
count := cnt. |
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163 |
]. |
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164 |
|
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165 |
"Created: / 26-08-2012 / 17:02:29 / Jan Vrany <jan.vrany@fit.cvut.cz>" |
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166 |
"Modified: / 03-06-2017 / 23:10:47 / Jan Vrany <jan.vrany@fit.cvut.cz>" |
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167 |
! ! |
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168 |
|
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169 |
!JavaMonitor methodsFor:'public'! |
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170 |
|
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171 |
enter |
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172 |
<resource: #obsolete> |
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173 |
self obsoleteMethodWarning: 'Use #acquire instead'. |
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174 |
^ self acquire. |
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175 |
|
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176 |
"Created: / 20-11-2011 / 13:21:42 / Marcel Hlopko <hlopkmar@fel.cvut.cz>" |
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177 |
"Modified: / 14-08-2017 / 10:20:31 / Jan Vrany <jan.vrany@fit.cvut.cz>" |
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178 |
! |
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179 |
|
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180 |
exit |
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181 |
<resource: #obsolete> |
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self obsoleteMethodWarning: 'Use #release instead'. |
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183 |
^ self release. |
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184 |
|
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185 |
"Created: / 20-11-2011 / 13:21:54 / Marcel Hlopko <hlopkmar@fel.cvut.cz>" |
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"Modified: / 14-08-2017 / 10:20:43 / Jan Vrany <jan.vrany@fit.cvut.cz>" |
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! |
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188 |
|
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notify |
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<resource: #obsolete> |
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self obsoleteMethodWarning: 'Use `notify: false` instead'. |
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^ self notify: false. |
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"Created: / 22-11-2011 / 12:14:23 / Marcel Hlopko <hlopkmar@fel.cvut.cz>" |
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"Modified: / 14-08-2017 / 10:19:59 / Jan Vrany <jan.vrany@fit.cvut.cz>" |
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! |
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notify: all |
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" |
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An implementation of java.lang.Object#notify() and #notifyAll(). If `all` is |
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`true` then all waiting threads are notified (see #norifyAll()) otherwise only |
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one thread is notified (see #notify()). Returns `true` after when threads have |
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been notified or `false` if calling thread does not own the monitor. |
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See Java API documentation for java.lang.Object#notify() and #notifyAll(). |
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https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html#notify() |
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https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html#notifyAll() |
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" |
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| active | |
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active := Processor activeProcess. |
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process == active ifFalse:[ |
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"/ Oops, calling thread does not own the monitor. return false |
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"/ immediately. The caller is responsible for throwing |
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"/ IllegalMonitorStateException... |
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^ false. |
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]. |
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JavaVM monitorTrace ifTrue:[ |
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Logger |
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log: ('%1: notifying %1%2 processes' bindWith: active printString |
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with: (all ifTrue:[ 'all ' ] ifFalse:[ '' ]) |
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with: waitingSema waitingProcesses size) |
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severity: Logger severityDEBUG |
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facility: #JVM. |
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]. |
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all ifTrue:[ waitingSema signalForAll ] ifFalse:[ waitingSema signal ]. |
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Processor yield. |
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^ true |
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|
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"Created: / 14-08-2017 / 10:17:20 / Jan Vrany <jan.vrany@fit.cvut.cz>" |
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! |
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notifyAll |
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<resource: #obsolete> |
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self obsoleteMethodWarning: 'Use `notify: true` instead'. |
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^ self notify: true. |
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|
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"Created: / 22-11-2011 / 12:14:36 / Marcel Hlopko <hlopkmar@fel.cvut.cz>" |
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"Modified: / 14-08-2017 / 10:19:47 / Jan Vrany <jan.vrany@fit.cvut.cz>" |
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! |
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|
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wait |
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<resource: #obsolete> |
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self obsoleteFeatureWarning: 'Use `waitForMilliseconds: nil` insteead'. |
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^ self waitForMilliseconds: nil. |
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|
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"Created: / 22-11-2011 / 11:57:56 / Marcel Hlopko <hlopkmar@fel.cvut.cz>" |
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"Modified: / 14-08-2017 / 09:37:18 / Jan Vrany <jan.vrany@fit.cvut.cz>" |
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! |
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|
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waitForMilliseconds: timeOut |
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" |
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An implementation of java.lang.Object#wait(long). Returns `true` |
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after waiting or `false` immediately (i.e., won't block) if calling |
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thread does not own the monitor. |
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256 |
|
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See Java API documentation for java.lang.Object#wait(long): |
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https://docs.oracle.com/javase/7/docs/api/java/lang/Object.html#wait(long) |
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" |
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| active countBeforeWait | |
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active := Processor activeProcess. |
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process == active ifFalse:[ |
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"/ Oops, calling thread does not own the monitor. return false |
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"/ immediately. The caller is responsible for throwing |
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"/ IllegalMonitorStateException... |
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^ false. |
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]. |
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self waitEnabled ifFalse: [ |
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JavaVM monitorTrace ifTrue:[ |
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Logger |
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log: ('%1 wanted to go to sleep, but it cant, this monitor is for %2 which is already dead' |
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bindWith: active printString |
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with: ownerPrintString) |
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severity: Logger severityDEBUG |
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facility: #JVM. |
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]. |
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^ true. |
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]. |
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JavaVM monitorTrace ifTrue:[ |
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Logger |
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log: ('%1 is going to wait on %3 for timeout: %2' |
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bindWith: active printString |
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with: timeOut |
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with: ownerPrintString printString) |
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severity: #debug |
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facility: #JVM. |
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]. |
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countBeforeWait := count. |
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"/ Release the monitor so other thread can acquire it |
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"/ and call #notify or #notifyAll |
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count := 1. "/ note that at this point we still own the monitor |
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self release. |
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"/ Monitor released, wait... |
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"JV@2011-11-25: zero timeout means wait without timeout!!!!!!" |
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timeOut == 0 ifTrue: [ waitingSema wait ] ifFalse: [ |
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waitingSema waitWithTimeoutMs: timeOut |
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]. |
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JavaVM monitorTrace ifTrue:[ |
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Logger |
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log: ('%1 has been notified and is trying to acquire monitor for %2 which is owned by %3' |
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bindWith: active printString with: ownerPrintString printString with: process printString) |
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severity: #debug |
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facility: #JVM. |
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]. |
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"/ We have been notified, re-acquire the monitor |
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self acquire. |
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count := countBeforeWait. "/ note that at this point we already own the monitor. |
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^ true. |
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|
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"Created: / 22-11-2011 / 12:52:45 / Marcel Hlopko <hlopkmar@fel.cvut.cz>" |
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"Modified: / 01-12-2011 / 10:57:52 / Marcel Hlopko <hlopkmar@fel.cvut.cz>" |
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"Modified (comment): / 14-08-2017 / 09:52:06 / Jan Vrany <jan.vrany@fit.cvut.cz>" |
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! ! |
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|
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!JavaMonitor methodsFor:'queries'! |
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|
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isOwnedBy: aProcess |
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^ process == aProcess. |
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|
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"Created: / 20-11-2011 / 13:23:14 / Marcel Hlopko <hlopkmar@fel.cvut.cz>" |
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"Modified: / 12-08-2017 / 21:24:35 / Jan Vrany <jan.vrany@fit.cvut.cz>" |
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! ! |
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|
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!JavaMonitor class methodsFor:'documentation'! |
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|
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version_CVS |
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^ '$Header$' |
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! |
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|
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version_HG |
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|
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^ '$Changeset: <not expanded> $' |
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! |
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|
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version_SVN |
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^ '$Id$' |
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! ! |
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