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- /*
- * @(#)monitor.h 1.35 98/07/01
- *
- * Copyright 1995-1998 by Sun Microsystems, Inc.,
- * 901 San Antonio Road, Palo Alto, California, 94303, U.S.A.
- * All rights reserved.
- *
- * This software is the confidential and proprietary information
- * of Sun Microsystems, Inc. ("Confidential Information"). You
- * shall not disclose such Confidential Information and shall use
- * it only in accordance with the terms of the license agreement
- * you entered into with Sun.
- */
-
- /*
- * Monitor interface
- */
-
- #ifndef _MONITOR_H_
- #define _MONITOR_H_
-
- #include "sys_api.h"
-
- /*
- * Used by the monitor caching machanism to mark monitors as being
- * in-use.
- */
- #define MON_LOCAL_CACHE_REF (1 << 0)
-
- /*
- * The monitor data structure:
- *
- * The use_count field counts the number of createMonitor calls yet
- * unmatched by monitorExit calls; that is, it is a count of outstanding
- * monitor entries of all threads regardless of whether those threads
- * own the monitor or are waiting on it.
- *
- * Note that because the mid[] array will hold the system-specific
- * sys_mon_t, it needs to start on a four-byte boundary lest the fields
- * of the sys_mon_t aren't properly aligned. Otherwise the flags field
- * would be shorter than a long.
- */
- typedef struct monitor_t {
- unsigned int key; /* Monitor hash key */
- struct monitor_t *next;
- char mid[1]; /* The sys_mon_t */
- } monitor_t, *MID;
-
- /* A macro for accessing the sys_mon_t from the monitor_t */
- #define sysmon(m) (*(sys_mon_t *) m->mid)
-
- typedef struct reg_mon_t {
- sys_mon_t *mid;
- char *name;
- struct reg_mon_t *next;
- } reg_mon_t;
-
- /*
- * Macros
- */
- #define MID_NULL ((MID) 0)
- #define TIMEOUT_INFINITY -1
-
- /*
- * Support for the monitor registry
- */
- extern sys_mon_t *_registry_lock;
-
- #define REGISTRY_LOCK_INIT() monitorRegister(_registry_lock, \
- "Monitor registry")
- #define REGISTRY_LOCK() sysMonitorEnter(_registry_lock)
- #define REGISTRY_LOCKED() sysMonitorEntered(_registry_lock)
- #define REGISTRY_UNLOCK() sysMonitorExit(_registry_lock)
-
- /*
- * External routines.
- */
-
- /*
- * Synchronization interface
- */
- void monitorInit(monitor_t *mon);
- void monitorCacheInit(void);
- void monitorEnter(unsigned int);
- void monitorExit(unsigned int);
- void monitorExit_native(unsigned int);
- void monitorWait(unsigned int, int);
- void monitorNotify(unsigned int);
- void monitorNotifyAll(unsigned int);
-
- /* Registry of static monitors */
- extern reg_mon_t *MonitorRegistry;
- void awt_lock_enter(void);
- void awt_lock_exit(void);
- void awt_lock_wait(int millis);
- void awt_lock_notify(void);
- void awt_lock_notify_all(void);
- sys_thread_t *awt_lock_owner(void);
-
-
- void monitorRegistryInit(void);
- void monitorRegister(sys_mon_t *, char *);
- void monitorUnregister(sys_mon_t *);
- void registeredEnumerate(void (*)(reg_mon_t *, void *), void *);
- void registeredEnumerate_unlocked(void (*)(reg_mon_t *, void *), void *);
-
-
- /*
- * Random non-local locks without obviously better homes
- */
-
- /* The class loading lock */
-
- extern sys_mon_t *_loadclass_lock;
- #define LOADCLASS_LOCK_INIT() \
- monitorRegister(_loadclass_lock, "Class loading lock")
- #define LOADCLASS_LOCK() sysMonitorEnter(_loadclass_lock)
- #define LOADCLASS_LOCKED() sysMonitorEntered(_loadclass_lock)
- #define LOADCLASS_UNLOCK() sysMonitorExit(_loadclass_lock)
-
- /* The global class table (binclasses) lock */
- extern sys_mon_t *_binclass_lock;
- #define BINCLASS_LOCK_INIT() monitorRegister(_binclass_lock, "BinClass lock")
- #define BINCLASS_LOCK() sysMonitorEnter(_binclass_lock)
- #define BINCLASS_LOCKED() sysMonitorEntered(_binclass_lock)
- #define BINCLASS_UNLOCK() sysMonitorExit(_binclass_lock)
-
- /* Locks on the interned string hash table */
-
- extern sys_mon_t *_stringhash_lock;
- #define STRINGHASH_INIT() monitorRegister(_stringhash_lock, \
- "String intern lock")
- #define STRINGHASH_LOCK() sysMonitorEnter(_stringhash_lock)
- #define STRINGHASH_LOCKED() sysMonitorEntered(_stringhash_lock)
- #define STRINGHASH_UNLOCK() sysMonitorExit(_stringhash_lock)
-
- /* Locks on the method info (name and signature) hash table */
-
- extern sys_mon_t *_nametypehash_lock;
- #define NAMETYPEHASH_INIT() monitorRegister(_nametypehash_lock, \
- "Name and type hash table lock")
- #define NAMETYPEHASH_LOCK() sysMonitorEnter(_nametypehash_lock)
- #define NAMETYPEHASH_LOCKED() sysMonitorEntered(_nametypehash_lock)
- #define NAMETYPEHASH_UNLOCK() sysMonitorExit(_nametypehash_lock)
-
- /* JNI global reference locks */
-
- extern sys_mon_t *_globalref_lock;
- #define GLOBALREF_LOCK_INIT() \
- monitorRegister(_globalref_lock, "JNI global reference lock")
- #define GLOBALREF_LOCK() sysMonitorEnter(_globalref_lock)
- #define GLOBALREF_LOCKED() sysMonitorEntered(_globalref_lock)
- #define GLOBALREF_UNLOCK() sysMonitorExit(_globalref_lock)
-
- /* reentrant gethostbyname/gethostbyaddr (gethostbyxxxx_r) locks */
-
- extern sys_mon_t _hostent_lock;
- #define HOSTENT_LOCK_INIT() monitorRegister(&_hostent_lock, "hostent lock");
- #define HOSTENT_LOCK() sysMonitorEnter(&_hostent_lock)
- #define HOSTENT_UNLOCK() sysMonitorExit(&_hostent_lock)
- #define HOSTENT_LOCKED() sysMonitorEntered(&_hostent_lock)
-
- #endif /* !_MONITOR_H_ */
-