155 * or anything else where we are not in control if we suddenly jump out.
156 */
157 class ThreadCrashProtection : public StackObj {
158 public:
159 static bool is_crash_protected(Thread* thr) {
160 return _crash_protection != NULL && _protected_thread == thr;
161 }
162
163 ThreadCrashProtection();
164 bool call(os::CrashProtectionCallback& cb);
165
166 static void check_crash_protection(int signal, Thread* thread);
167 private:
168 static Thread* _protected_thread;
169 static ThreadCrashProtection* _crash_protection;
170 static volatile intptr_t _crash_mux;
171 void restore();
172 sigjmp_buf _jmpbuf;
173 };
174
175 #ifndef SOLARIS
176
177 /*
178 * This is the platform-specific implementation underpinning
179 * the ParkEvent class, which itself underpins Java-level monitor
180 * operations. See park.hpp for details.
181 * These event objects are type-stable and immortal - we never delete them.
182 * Events are associated with a thread for the lifetime of the thread.
183 */
184 class PlatformEvent : public CHeapObj<mtSynchronizer> {
185 private:
186 double cachePad[4]; // Increase odds that _mutex is sole occupant of cache line
187 volatile int _event; // Event count/permit: -1, 0 or 1
188 volatile int _nParked; // Indicates if associated thread is blocked: 0 or 1
189 pthread_mutex_t _mutex[1]; // Native mutex for locking
190 pthread_cond_t _cond[1]; // Native condition variable for blocking
191 double postPad[2];
192
193 protected: // TODO-FIXME: make dtor private
194 ~PlatformEvent() { guarantee(false, "invariant"); } // immortal so can't delete
195
318
319 #else
320
321 pthread_cond_t _cond;
322 pthread_cond_t* cond() { return &_cond; }
323
324 public:
325 PlatformMonitor();
326 ~PlatformMonitor();
327
328 #endif // PLATFORM_MONITOR_IMPL_INDIRECT
329
330 private:
331 NONCOPYABLE(PlatformMonitor);
332
333 public:
334 int wait(jlong millis);
335 void notify();
336 void notify_all();
337 };
338
339 #endif // !SOLARIS
340
341 #endif // OS_POSIX_OS_POSIX_HPP
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155 * or anything else where we are not in control if we suddenly jump out.
156 */
157 class ThreadCrashProtection : public StackObj {
158 public:
159 static bool is_crash_protected(Thread* thr) {
160 return _crash_protection != NULL && _protected_thread == thr;
161 }
162
163 ThreadCrashProtection();
164 bool call(os::CrashProtectionCallback& cb);
165
166 static void check_crash_protection(int signal, Thread* thread);
167 private:
168 static Thread* _protected_thread;
169 static ThreadCrashProtection* _crash_protection;
170 static volatile intptr_t _crash_mux;
171 void restore();
172 sigjmp_buf _jmpbuf;
173 };
174
175
176 /*
177 * This is the platform-specific implementation underpinning
178 * the ParkEvent class, which itself underpins Java-level monitor
179 * operations. See park.hpp for details.
180 * These event objects are type-stable and immortal - we never delete them.
181 * Events are associated with a thread for the lifetime of the thread.
182 */
183 class PlatformEvent : public CHeapObj<mtSynchronizer> {
184 private:
185 double cachePad[4]; // Increase odds that _mutex is sole occupant of cache line
186 volatile int _event; // Event count/permit: -1, 0 or 1
187 volatile int _nParked; // Indicates if associated thread is blocked: 0 or 1
188 pthread_mutex_t _mutex[1]; // Native mutex for locking
189 pthread_cond_t _cond[1]; // Native condition variable for blocking
190 double postPad[2];
191
192 protected: // TODO-FIXME: make dtor private
193 ~PlatformEvent() { guarantee(false, "invariant"); } // immortal so can't delete
194
317
318 #else
319
320 pthread_cond_t _cond;
321 pthread_cond_t* cond() { return &_cond; }
322
323 public:
324 PlatformMonitor();
325 ~PlatformMonitor();
326
327 #endif // PLATFORM_MONITOR_IMPL_INDIRECT
328
329 private:
330 NONCOPYABLE(PlatformMonitor);
331
332 public:
333 int wait(jlong millis);
334 void notify();
335 void notify_all();
336 };
337
338 #endif // OS_POSIX_OS_POSIX_HPP
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