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-/*
- * %CopyrightBegin%
- *
- * Copyright Ericsson AB 2004-2017. All Rights Reserved.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- * %CopyrightEnd%
- */
-
-/**********************************************************************
- * Header for monitors and links data structures.
- * Monitors are kept in an AVL tree and the data structures for
- * the four different types of monitors are like this:
- **********************************************************************
- * Local monitor by pid/port:
- * (Ref is always same in all involved data structures)
- **********************************************************************
- * Process/Port X Process Y
- * +-------------+ +-------------+
- * Type: | MON_ORIGIN | | MON_TARGET |
- * +-------------+ +-------------+
- * Pid: | Pid(Y) | | Pid/Port(X) |
- * +-------------+ +-------------+
- * Name: | [] | | [] |
- * +-------------+ +-------------+
- **********************************************************************
- * Local monitor by name: (Ref is always same in all involved data structures)
- **********************************************************************
- * Process X Process Y (name foo)
- * +-------------+ +-------------+
- * Type: | MON_ORIGIN | | MON_TARGET |
- * +-------------+ +-------------+
- * Pid: | Pid(Y) | | Pid(X) |
- * +-------------+ +-------------+
- * Name: | Atom(foo) | | Atom(foo) |
- * +-------------+ +-------------+
- **********************************************************************
- * Remote monitor by pid: (Ref is always same in all involved data structures)
- **********************************************************************
- * Node A | Node B
- * ---------------------------------+----------------------------------
- * Process X (@A) Distentry @A Distentry @B Process Y (@B)
- * for node B for node A
- * +-------------+ +-------------+ +-------------+ +-------------+
- * Type: | MON_ORIGIN | | MON_TARGET | | MON_ORIGIN | | MON_TARGET |
- * +-------------+ +-------------+ +-------------+ +-------------+
- * Pid: | Pid(Y) | | Pid(X) | | Pid(Y) | | Pid(X) |
- * +-------------+ +-------------+ +-------------+ +-------------+
- * Name: | [] | | [] | | [] | | [] |
- * +-------------+ +-------------+ +-------------+ +-------------+
- **********************************************************************
- * Remote monitor by name: (Ref is always same in all involved data structures)
- **********************************************************************
- * Node A | Node B
- * ---------------------------------+----------------------------------
- * Process X (@A) Distentry @A Distentry @B Process Y (@B)
- * for node B for node A (name foo)
- * +-------------+ +-------------+ +-------------+ +-------------+
- * Type: | MON_ORIGIN | | MON_TARGET | | MON_ORIGIN | | MON_TARGET |
- * +-------------+ +-------------+ +-------------+ +-------------+
- * Pid: | Atom(node B)| | Pid(X) | | Pid(Y) | | Pid(X) |
- * +-------------+ +-------------+ +-------------+ +-------------+
- * Name: | Atom(foo) | | Atom(foo) | | Atom(foo) | | Atom(foo) |
- * +-------------+ +-------------+ +-------------+ +-------------+
- * The reason for the node atom in X->pid is that we don't know the actual
- * pid of the monitored process on the other node when setting the monitor
- * (which is done asyncronously).
- **********************************************************************/
-#ifndef _ERL_MONITORS_H
-#define _ERL_MONITORS_H
-
-/* Type tags for monitors */
-#define MON_ORIGIN 1
-#define MON_TARGET 2
-#define MON_NIF_TARGET 3
-#define MON_TIME_OFFSET 4
-
-/* Type tags for links */
-#define LINK_PID 1 /* ...Or port */
-#define LINK_NODE 3 /* "Node monitor" */
-
-/* Size of a monitor without heap, in words (fixalloc) */
-#define ERTS_MONITOR_SIZE ((sizeof(ErtsMonitor) - sizeof(Uint))/sizeof(Uint))
-#define ERTS_MONITOR_SH_SIZE (ERTS_MONITOR_SIZE + ERTS_REF_THING_SIZE)
-#define ERTS_LINK_SIZE ((sizeof(ErtsLink) - sizeof(Uint))/sizeof(Uint))
-#define ERTS_LINK_SH_SIZE ERTS_LINK_SIZE /* Size of fix-alloced links */
-
-/* ErtsMonitor and ErtsLink *need* to begin in a similar way as
- ErtsMonitorOrLink */
-typedef struct erts_monitor_or_link {
- struct erts_monitor_or_link *left, *right;
- Sint16 balance;
-} ErtsMonitorOrLink;
-
-typedef struct erts_monitor {
- struct erts_monitor *left, *right;
- Sint16 balance;
- Uint16 type; /* MON_ORIGIN | MON_TARGET | MON_NIF_TARGET | MON_TIME_OFFSET */
- Eterm ref;
- union {
- Eterm pid; /* In case of distributed named monitor, this is the
- * nodename atom in MON_ORIGIN process, otherwise a pid or,
- * in case of a MON_TARGET, a port
- */
- struct ErtsResource_* resource; /* MON_NIF_TARGET */
- }u;
- Eterm name; /* When monitoring a named process: atom() else [] */
- Uint heap[1]; /* Larger in reality */
-} ErtsMonitor;
-
-typedef struct erts_link {
- struct erts_link *left, *right;
- Sint16 balance;
- Uint16 type; /* LINK_PID | LINK_NODE */
- Eterm pid; /* When node monitor,
- the node atom is here instead */
- union {
- struct erts_link *root; /* Used only in dist entries */
- Uint refc;
- } shared;
- Uint heap[1]; /* Larger in reality */
-} ErtsLink;
-
-typedef struct erts_suspend_monitor {
- struct erts_suspend_monitor *left, *right;
- Sint16 balance;
-
- int pending;
- int active;
- Eterm pid;
-} ErtsSuspendMonitor;
-
-#define ERTS_LINK_ROOT(Linkp) ((Linkp)->shared.root)
-#define ERTS_LINK_REFC(Linkp) ((Linkp)->shared.refc)
-
-Uint erts_tot_link_lh_size(void);
-
-
-/* Prototypes */
-void erts_destroy_monitor(ErtsMonitor *mon);
-void erts_add_monitor(ErtsMonitor **root, Uint type, Eterm ref, UWord entity,
- Eterm name);
-ErtsMonitor *erts_remove_monitor(ErtsMonitor **root, Eterm ref);
-ErtsMonitor *erts_lookup_monitor(ErtsMonitor *root, Eterm ref);
-void erts_sweep_monitors(ErtsMonitor *root,
- void (*doit)(ErtsMonitor *, void *),
- void *context);
-
-void erts_destroy_link(ErtsLink *lnk);
-/* Returns 0 if OK, < 0 if already present */
-int erts_add_link(ErtsLink **root, Uint type, Eterm pid);
-ErtsLink *erts_add_or_lookup_link(ErtsLink **root, Uint type, Eterm pid);
-ErtsLink *erts_remove_link(ErtsLink **root, Eterm pid);
-ErtsLink *erts_lookup_link(ErtsLink *root, Eterm pid);
-void erts_sweep_links(ErtsLink *root,
- void (*doit)(ErtsLink *, void *),
- void *context);
-
-void erts_destroy_suspend_monitor(ErtsSuspendMonitor *sproc);
-void erts_sweep_suspend_monitors(ErtsSuspendMonitor *root,
- void (*doit)(ErtsSuspendMonitor *, void *),
- void *context);
-ErtsSuspendMonitor *erts_add_or_lookup_suspend_monitor(ErtsSuspendMonitor **root,
- Eterm pid);
-ErtsSuspendMonitor *erts_lookup_suspend_monitor(ErtsSuspendMonitor *root,
- Eterm pid);
-void erts_delete_suspend_monitor(ErtsSuspendMonitor **root, Eterm pid);
-void erts_init_monitors(void);
-void erts_one_link_size(ErtsLink *lnk, void *vpu);
-void erts_one_mon_size(ErtsMonitor *mon, void *vpu);
-
-#define erts_doforall_monitors erts_sweep_monitors
-#define erts_doforall_links erts_sweep_links
-#define erts_doforall_suspend_monitors erts_sweep_suspend_monitors
-
-#endif /* _ERL_MONITORS_H */
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