131
132 /**
133 * Suspend Java profiling.
134 */
135 // public native static void suspendJavaProfiler();
136
137 /**
138 * Initialize Java profiling. Any accumulated profiling
139 * information is discarded.
140 */
141 // public native static void resetJavaProfiler();
142
143 /**
144 * Write the current profiling contents to the file "java.prof".
145 * If the file already exists, it will be overwritten.
146 */
147 // public native static void writeJavaProfilerReport();
148
149
150 private static volatile boolean booted = false;
151
152 // Invoked by by System.initializeSystemClass just before returning.
153 // Subsystems that are invoked during initialization can check this
154 // property in order to avoid doing things that should wait until the
155 // application class loader has been set up.
156 //
157 public static void booted() {
158 booted = true;
159 }
160
161 public static boolean isBooted() {
162 return booted;
163 }
164
165 // A user-settable upper limit on the maximum amount of allocatable direct
166 // buffer memory. This value may be changed during VM initialization if
167 // "java" is launched with "-XX:MaxDirectMemorySize=<size>".
168 //
169 // The initial value of this field is arbitrary; during JRE initialization
170 // it will be reset to the value specified on the command line, if any,
171 // otherwise to Runtime.getRuntime().maxMemory().
172 //
173 private static long directMemory = 64 * 1024 * 1024;
174
175 // Returns the maximum amount of allocatable direct buffer memory.
176 // The directMemory variable is initialized during system initialization
177 // in the saveAndRemoveProperties method.
178 //
179 public static long maxDirectMemory() {
180 return directMemory;
181 }
182
183 // User-controllable flag that determines if direct buffers should be page
184 // aligned. The "-XX:+PageAlignDirectMemory" option can be used to force
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131
132 /**
133 * Suspend Java profiling.
134 */
135 // public native static void suspendJavaProfiler();
136
137 /**
138 * Initialize Java profiling. Any accumulated profiling
139 * information is discarded.
140 */
141 // public native static void resetJavaProfiler();
142
143 /**
144 * Write the current profiling contents to the file "java.prof".
145 * If the file already exists, it will be overwritten.
146 */
147 // public native static void writeJavaProfilerReport();
148
149
150 private static volatile boolean booted = false;
151 private static final Object lock = new Object();
152
153 // Invoked by by System.initializeSystemClass just before returning.
154 // Subsystems that are invoked during initialization can check this
155 // property in order to avoid doing things that should wait until the
156 // application class loader has been set up.
157 //
158 public static void booted() {
159 synchronized (lock) {
160 booted = true;
161 lock.notifyAll();
162 }
163 }
164
165 public static boolean isBooted() {
166 return booted;
167 }
168
169 // Waits until VM completes initialization
170 //
171 // This method is invoked by the Finalizer thread
172 public static boolean awaitBooted() throws InterruptedException {
173 synchronized (lock) {
174 while (!booted) {
175 lock.wait();
176 }
177 }
178 return booted;
179 }
180
181 // A user-settable upper limit on the maximum amount of allocatable direct
182 // buffer memory. This value may be changed during VM initialization if
183 // "java" is launched with "-XX:MaxDirectMemorySize=<size>".
184 //
185 // The initial value of this field is arbitrary; during JRE initialization
186 // it will be reset to the value specified on the command line, if any,
187 // otherwise to Runtime.getRuntime().maxMemory().
188 //
189 private static long directMemory = 64 * 1024 * 1024;
190
191 // Returns the maximum amount of allocatable direct buffer memory.
192 // The directMemory variable is initialized during system initialization
193 // in the saveAndRemoveProperties method.
194 //
195 public static long maxDirectMemory() {
196 return directMemory;
197 }
198
199 // User-controllable flag that determines if direct buffers should be page
200 // aligned. The "-XX:+PageAlignDirectMemory" option can be used to force
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