aboutsummaryrefslogblamecommitdiffstats
path: root/erts/emulator/beam/global.h
blob: cab249a53f758fad7d17a6a9fc9c3048372960cc (plain) (tree)
1
2
3
4
5
6
7
8
9
10
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445

                   


                                                        




                                                                      
  



                                                                         
  






                    
                                    





















































                                                                           





                                                                 

                                         
                                   


                  
                               
                         
                                        
  

                                                              
                                                          
                                         


                                                        





































































































































































































































































































                                                                                                
 
              



                                                    
      








                                                                            



                                             


                                        















                                   






                                                                          
                                       
                                                
                                 
                                                               
                                      



                                                


                                                                           
 
                                                                     
                                            

                                                                        


























































































































































































































































































































































































































































































































































































































































































































































































































































































































































































































                                                                                         




                                                                     



























































































































































































































































                                                                                                         











































































































































                                                                               
/*
 * %CopyrightBegin%
 *
 * Copyright Ericsson AB 1996-2010. All Rights Reserved.
 *
 * The contents of this file are subject to the Erlang Public License,
 * Version 1.1, (the "License"); you may not use this file except in
 * compliance with the License. You should have received a copy of the
 * Erlang Public License along with this software. If not, it can be
 * retrieved online at http://www.erlang.org/.
 *
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
 * the License for the specific language governing rights and limitations
 * under the License.
 *
 * %CopyrightEnd%
 */

#ifndef __GLOBAL_H__
#define __GLOBAL_H__

#include "sys.h"
#include <stddef.h> /* offsetof() */
#include "erl_alloc.h"
#include "erl_vm.h"
#include "erl_node_container_utils.h"
#include "hash.h"
#include "index.h"
#include "atom.h"
#include "export.h"
#include "module.h"
#include "register.h"
#include "erl_fun.h"
#include "erl_node_tables.h"
#include "benchmark.h"
#include "erl_process.h"
#include "erl_sys_driver.h"
#include "erl_debug.h"

typedef struct port Port;
#include "erl_port_task.h"

#define ERTS_MAX_NO_OF_ASYNC_THREADS 1024
extern int erts_async_max_threads;
#define ERTS_ASYNC_THREAD_MIN_STACK_SIZE 16	/* Kilo words */
#define ERTS_ASYNC_THREAD_MAX_STACK_SIZE 8192	/* Kilo words */
extern int erts_async_thread_suggested_stack_size;

typedef struct erts_driver_t_ erts_driver_t;

#define SMALL_IO_QUEUE 5   /* Number of fixed elements */

typedef struct {
    int size;       /* total size in bytes */

    SysIOVec* v_start;
    SysIOVec* v_end;
    SysIOVec* v_head;
    SysIOVec* v_tail;
    SysIOVec  v_small[SMALL_IO_QUEUE];

    ErlDrvBinary** b_start;
    ErlDrvBinary** b_end;
    ErlDrvBinary** b_head;
    ErlDrvBinary** b_tail;
    ErlDrvBinary*  b_small[SMALL_IO_QUEUE];
} ErlIOQueue;

typedef struct line_buf {  /* Buffer used in line oriented I/O */
    int bufsiz;              /* Size of character buffer */
    int ovlen;               /* Length of overflow data */
    int ovsiz;               /* Actual size of overflow buffer */
    char data[1];            /* Starting point of buffer data,
			      data[0] is a flag indicating an unprocess CR,
			      The rest is the overflow buffer. */
} LineBuf;

/* Temporary object header, auto-deallocated when NIF returns. */
struct enif_tmp_obj_t {
    struct enif_tmp_obj_t* next;
    void (*dtor)(struct enif_tmp_obj_t*);
    /*char data[];*/
};
struct enif_environment_t /* ErlNifEnv */
{
    struct erl_module_nif* mod_nif;
    Process* proc;
    Eterm* hp;
    Eterm* hp_end;
    ErlHeapFragment* heap_frag;
    int fpe_was_unmasked;
    struct enif_tmp_obj_t* tmp_obj_list;
};
extern void erts_pre_nif(struct enif_environment_t*, Process*,
			 struct erl_module_nif*);
extern void erts_post_nif(struct enif_environment_t* env);
extern Eterm erts_nif_taints(Process* p);
extern void erts_print_nif_taints(int to, void* to_arg);
void erts_unload_nif(struct erl_module_nif* nif);
extern void erl_nif_init(void);

/*
 * Port Specific Data.
 *
 * Only use PrtSD for very rarely used data.
 */

#define ERTS_PRTSD_SCHED_ID 0

#define ERTS_PRTSD_SIZE 1

typedef struct {
    void *data[ERTS_PRTSD_SIZE];
} ErtsPrtSD;

#ifdef ERTS_SMP
typedef struct ErtsXPortsList_ ErtsXPortsList;
#endif

/*
 * Port locking:
 *
 * Locking is done either driver specific or port specific. When
 * driver specific locking is used, all instances of the driver,
 * i.e. ports running the driver, share the same lock. When port
 * specific locking is used each instance have its own lock.
 *
 * Most fields in the Port structure are protected by the lock
 * referred to by the lock field. I'v called it the port lock.
 * This lock is shared between all ports running the same driver
 * when driver specific locking is used.
 *
 * The 'sched' field is protected by the port tasks lock
 * (see erl_port_tasks.c)
 *
 * The 'status' field is protected by a combination of the port lock,
 * the port tasks lock, and the state_lck. It may be read if
 * the state_lck, or the port lock is held. It may only be
 * modified if both the port lock and the state_lck is held
 * (with one exception; see below). When changeing status from alive
 * to dead or vice versa, also the port task lock has to be held.
 * This in order to guarantee that tasks are scheduled only for
 * ports that are alive.
 *
 * The status field may be modified with only the state_lck
 * held when status is changed from dead to alive. This since no
 * threads can have any references to the port other than via the
 * port table.
 *
 * /rickard
 */

struct port {
    ErtsPortTaskSched sched;
    ErtsPortTaskHandle timeout_task;
#ifdef ERTS_SMP
    erts_smp_atomic_t refc;
    erts_smp_mtx_t *lock;
    ErtsXPortsList *xports;
    erts_smp_atomic_t run_queue;
    erts_smp_spinlock_t state_lck;  /* protects: id, status, snapshot */
#endif
    Eterm id;                   /* The Port id of this port */
    Eterm connected;            /* A connected process */
    Eterm caller;		/* Current caller. */
    Eterm data;			/* Data associated with port. */
    ErlHeapFragment* bp;	/* Heap fragment holding data (NULL if imm data). */
    ErtsLink *nlinks;
    ErtsMonitor *monitors;      /* Only MON_ORIGIN monitors of pid's */
    Uint bytes_in;		/* Number of bytes read */
    Uint bytes_out;		/* Number of bytes written */
#ifdef ERTS_SMP
    ErtsSmpPTimer *ptimer;
#else
    ErlTimer tm;                 /* Timer entry */
#endif
    
    Eterm tracer_proc;		/* If the port is traced, this is the tracer */
    Uint trace_flags;		/* Trace flags */

    ErlIOQueue ioq;              /* driver accessible i/o queue */
    DistEntry *dist_entry;       /* Dist entry used in DISTRIBUTION */
    char *name;		         /* String used in the open */
    erts_driver_t* drv_ptr;
    long drv_data;
    ErtsProcList *suspended;	 /* List of suspended processes. */
    LineBuf *linebuf;            /* Buffer to hold data not ready for
				    process to get (line oriented I/O)*/
    Uint32 status;		 /* Status and type flags */
    int control_flags;		 /* Flags for port_control()  */
    Uint32 snapshot;             /* Next snapshot that port should be part of */
    struct reg_proc *reg;
    ErlDrvPDL port_data_lock;

    ErtsPrtSD *psd;		 /* Port specific data */
};


ERTS_GLB_INLINE ErtsRunQueue *erts_port_runq(Port *prt);

#if ERTS_GLB_INLINE_INCL_FUNC_DEF

ERTS_GLB_INLINE ErtsRunQueue *
erts_port_runq(Port *prt)
{
#ifdef ERTS_SMP
    ErtsRunQueue *rq1, *rq2;
    rq1 = (ErtsRunQueue *) erts_smp_atomic_read(&prt->run_queue);
    while (1) {
	erts_smp_runq_lock(rq1);
	rq2 = (ErtsRunQueue *) erts_smp_atomic_read(&prt->run_queue);
	if (rq1 == rq2)
	    return rq1;
	erts_smp_runq_unlock(rq1);
	rq1 = rq2;
    }
#else
    return erts_common_run_queue;
#endif
}

#endif


ERTS_GLB_INLINE void *erts_prtsd_get(Port *p, int ix);
ERTS_GLB_INLINE void *erts_prtsd_set(Port *p, int ix, void *new);

#if ERTS_GLB_INLINE_INCL_FUNC_DEF

ERTS_GLB_INLINE void *
erts_prtsd_get(Port *prt, int ix)
{
    return prt->psd ? prt->psd->data[ix] : NULL;
}

ERTS_GLB_INLINE void *
erts_prtsd_set(Port *prt, int ix, void *data)
{
    if (prt->psd) {
	void *old = prt->psd->data[ix];
	prt->psd->data[ix] = data;
	return old;
    }
    else {
	prt->psd = erts_alloc(ERTS_ALC_T_PRTSD, sizeof(ErtsPrtSD));
	prt->psd->data[ix] = data;
	return NULL;
    }
}

#endif

/* Driver handle (wrapper for old plain handle) */
#define ERL_DE_OK      0
#define ERL_DE_UNLOAD  1
#define ERL_DE_FORCE_UNLOAD 2 
#define ERL_DE_RELOAD  3
#define ERL_DE_FORCE_RELOAD  4
#define ERL_DE_PERMANENT 5

#define ERL_DE_PROC_LOADED 0
#define ERL_DE_PROC_AWAIT_UNLOAD 1
#define ERL_DE_PROC_AWAIT_UNLOAD_ONLY 2
#define ERL_DE_PROC_AWAIT_LOAD 3

/* Flags for process entries */
#define ERL_DE_FL_DEREFERENCED 1

/* Flags for drivers, put locking policy here /PaN */
#define ERL_DE_FL_KILL_PORTS 1

#define ERL_FL_CONSISTENT_MASK ( ERL_DE_FL_KILL_PORTS )

/* System specific load errors are returned as positive values */
#define ERL_DE_NO_ERROR 0
#define ERL_DE_LOAD_ERROR_NO_INIT -1
#define ERL_DE_LOAD_ERROR_FAILED_INIT -2
#define ERL_DE_LOAD_ERROR_BAD_NAME -3
#define ERL_DE_LOAD_ERROR_NAME_TO_LONG -4
#define ERL_DE_LOAD_ERROR_INCORRECT_VERSION -5
#define ERL_DE_ERROR_NO_DDLL_FUNCTIONALITY -6
#define ERL_DE_ERROR_UNSPECIFIED -7
#define ERL_DE_LOOKUP_ERROR_NOT_FOUND -8
#define ERL_DE_DYNAMIC_ERROR_OFFSET -10

typedef struct de_proc_entry {
    Process *proc;                   /* The process... */
    Uint    awaiting_status;         /* PROC_LOADED == Have loaded the driver
			                PROC_AWAIT_UNLOAD == Wants to be notified 
			                when we have unloaded the driver (was locked)
			                PROC_AWAIT_LOAD == Wants to be notified when we
			                reloaded the driver (old was locked) */
    Uint    flags;                   /* ERL_FL_DE_DEREFERENCED when reload in progress */
    Eterm   heap[REF_THING_SIZE];    /* "ref heap" */
    struct  de_proc_entry *next;
} DE_ProcEntry;

typedef struct {
    void         *handle;             /* Handle for DLL or SO (for dyn. drivers). */
    DE_ProcEntry *procs;              /* List of pids that have loaded this driver,
				         or that wait for it to change state */
    erts_refc_t  refc;                /* Number of ports/processes having
					 references to the driver */
    Uint         port_count;          /* Number of ports using the driver */
    Uint         flags;               /* ERL_DE_FL_KILL_PORTS */
    int          status;              /* ERL_DE_xxx */
    char         *full_path;          /* Full path of the driver */
    char         *reload_full_path;   /* If status == ERL_DE_RELOAD, this contains
				         full name of driver (path) */
    char         *reload_driver_name; /* ... and this contains the driver name */
    Uint         reload_flags;        /* flags for reloaded driver */
} DE_Handle;

/*
 * This structure represents a link to the next driver.
 */

struct erts_driver_t_ {
    erts_driver_t *next;
    erts_driver_t *prev;
    char *name;
    struct {
	int major;
	int minor;
    } version;
    int flags;
    DE_Handle *handle;
#ifdef ERTS_SMP
    erts_smp_mtx_t *lock;
#endif
    ErlDrvEntry *entry;
    ErlDrvData (*start)(ErlDrvPort port, char *command, SysDriverOpts* opts);
    void (*stop)(ErlDrvData drv_data);
    void (*finish)(void);
    void (*flush)(ErlDrvData drv_data);
    void (*output)(ErlDrvData drv_data, char *buf, int len);
    void (*outputv)(ErlDrvData drv_data, ErlIOVec *ev); /* Might be NULL */
    int (*control)(ErlDrvData drv_data, unsigned int command, char *buf, 
		   int len, char **rbuf, int rlen); /* Might be NULL */
    int (*call)(ErlDrvData drv_data, unsigned int command, char *buf, 
		int len, char **rbuf, int rlen, unsigned int *flags); /* Might be NULL */ 
    void (*event)(ErlDrvData drv_data, ErlDrvEvent event,
		  ErlDrvEventData event_data);
    void (*ready_input)(ErlDrvData drv_data, ErlDrvEvent event); 
    void (*ready_output)(ErlDrvData drv_data, ErlDrvEvent event);  
    void (*timeout)(ErlDrvData drv_data);
    void (*ready_async)(ErlDrvData drv_data, ErlDrvThreadData thread_data); /* Might be NULL */ 
    void (*process_exit)(ErlDrvData drv_data, ErlDrvMonitor *monitor);
    void (*stop_select)(ErlDrvEvent event, void*); /* Might be NULL */
};

extern erts_driver_t *driver_list;
extern erts_smp_mtx_t erts_driver_list_lock;

extern void erts_ddll_init(void);
extern void erts_ddll_lock_driver(DE_Handle *dh, char *name);

/* These are for bookkeeping */
extern void erts_ddll_increment_port_count(DE_Handle *dh);
extern void erts_ddll_decrement_port_count(DE_Handle *dh);

/* These makes things happen, drivers may be scheduled for unload etc */
extern void erts_ddll_reference_driver(DE_Handle *dh);
extern void erts_ddll_reference_referenced_driver(DE_Handle *dh);
extern void erts_ddll_dereference_driver(DE_Handle *dh);

extern char *erts_ddll_error(int code);
extern void erts_ddll_proc_dead(Process *p, ErtsProcLocks plocks);
extern int erts_ddll_driver_ok(DE_Handle *dh);
extern void erts_ddll_remove_monitor(Process *p,
				     Eterm ref,
				     ErtsProcLocks plocks);
extern Eterm erts_ddll_monitor_driver(Process *p,
				      Eterm description,
				      ErtsProcLocks plocks);
/*
 * Max no. of drivers (linked in and dynamically loaded). Each table
 * entry uses 4 bytes.
 */
#define DRIVER_TAB_SIZE 32

/*
** Just like the driver binary but with initial flags
** Note that the two structures Binary and ErlDrvBinary HAVE to
** be equal except for extra fields in the beginning of the struct.
** ErlDrvBinary is defined in erl_driver.h.
** When driver_alloc_binary is called, a Binary is allocated, but 
** the pointer returned is to the address of the first element that
** also occurs in the ErlDrvBinary struct (driver.*binary takes care if this).
** The driver need never know about additions to the internal Binary of the
** emulator. One should however NEVER be sloppy when mixing ErlDrvBinary
** and Binary, the macros below can convert one type to the other, as they both
** in reality are equal.
*/

#ifdef ARCH_32
 /* *DO NOT USE* only for alignment. */
#define ERTS_BINARY_STRUCT_ALIGNMENT Uint32 align__;
#else
#define ERTS_BINARY_STRUCT_ALIGNMENT
#endif

/* Add fields in ERTS_INTERNAL_BINARY_FIELDS, otherwise the drivers crash */
#define ERTS_INTERNAL_BINARY_FIELDS				\
    Uint flags;							\
    erts_refc_t refc;						\
    ERTS_BINARY_STRUCT_ALIGNMENT

typedef struct binary {
    ERTS_INTERNAL_BINARY_FIELDS
    long orig_size;
    char orig_bytes[1]; /* to be continued */
} Binary;

#define ERTS_SIZEOF_Binary(Sz) \
    (offsetof(Binary,orig_bytes) + (Sz))

typedef struct {
    ERTS_INTERNAL_BINARY_FIELDS
    long orig_size;
    void (*destructor)(Binary *);
    char magic_bin_data[1];
} ErtsMagicBinary;

typedef union {
    Binary binary;
    ErtsMagicBinary magic_binary;
    struct {
	ERTS_INTERNAL_BINARY_FIELDS
	ErlDrvBinary binary;
    } driver;
} ErtsBinary;

/*
 * 'Binary' alignment:
 *   Address of orig_bytes[0] of a Binary should always be 8-byte aligned.
 * It is assumed that the flags, refc, and orig_size fields are 4 bytes on
 * 32-bits architectures and 8 bytes on 64-bits architectures.
 */

#define ERTS_MAGIC_BIN_DESTRUCTOR(BP) \
  ((ErtsBinary *) (BP))->magic_binary.destructor
#define ERTS_MAGIC_BIN_DATA(BP) \
  ((void *) ((ErtsBinary *) (BP))->magic_binary.magic_bin_data)
#define ERTS_MAGIC_BIN_DATA_SIZE(BP) \
  ((BP)->orig_size - sizeof(void (*)(Binary *)))
#define ERTS_MAGIC_BIN_ORIG_SIZE(Sz) \
  (sizeof(void (*)(Binary *)) + (Sz))
#define ERTS_MAGIC_BIN_SIZE(Sz) \
  (offsetof(ErtsMagicBinary,magic_bin_data) + (Sz))
#define ERTS_MAGIC_BIN_FROM_DATA(DATA) \
  ((ErtsBinary*)((char*)(DATA) - offsetof(ErtsMagicBinary,magic_bin_data)))

#define Binary2ErlDrvBinary(B) (&((ErtsBinary *) (B))->driver.binary)
#define ErlDrvBinary2Binary(D) ((Binary *) \
				(((char *) (D)) \
				 - offsetof(ErtsBinary, driver.binary)))

/* A "magic" binary flag */
#define BIN_FLAG_MAGIC      1
#define BIN_FLAG_USR1       2 /* Reserved for use by different modules too mark */
#define BIN_FLAG_USR2       4 /*  certain binaries as special (used by ets) */
#define BIN_FLAG_DRV        8

/*
 * This structure represents one type of a binary in a process.
 */

typedef struct proc_bin {
    Eterm thing_word;		/* Subtag REFC_BINARY_SUBTAG. */
    Uint size;			/* Binary size in bytes. */
    struct proc_bin *next;	/* Pointer to next ProcBin. */
    Binary *val;		/* Pointer to Binary structure. */
    byte *bytes;		/* Pointer to the actual data bytes. */
    Uint flags;			/* Flag word. */
} ProcBin;

#define PB_IS_WRITABLE 1	/* Writable (only one reference to ProcBin) */
#define PB_ACTIVE_WRITER 2	/* There is an active writer */

/*
 * ProcBin size in Eterm words.
 */
#define PROC_BIN_SIZE (sizeof(ProcBin)/sizeof(Eterm))

ERTS_GLB_INLINE Eterm erts_mk_magic_binary_term(Eterm **hpp,
						ErlOffHeap *ohp,
						Binary *mbp);

#if ERTS_GLB_INLINE_INCL_FUNC_DEF

ERTS_GLB_INLINE Eterm
erts_mk_magic_binary_term(Eterm **hpp, ErlOffHeap *ohp, Binary *mbp)
{
    ProcBin *pb = (ProcBin *) *hpp;
    *hpp += PROC_BIN_SIZE;

    ASSERT(mbp->flags & BIN_FLAG_MAGIC);

    pb->thing_word = HEADER_PROC_BIN;
    pb->size = 0;
    pb->next = ohp->mso;
    ohp->mso = pb;
    pb->val = mbp;
    pb->bytes = (byte *) mbp->orig_bytes;
    pb->flags = 0;

    erts_refc_inc(&mbp->refc, 1);

    return make_binary(pb);    
}

#endif

#define ERTS_TERM_IS_MAGIC_BINARY(T) \
  (is_binary((T)) \
   && (thing_subtag(*binary_val((T))) == REFC_BINARY_SUBTAG) \
   && (((ProcBin *) binary_val((T)))->val->flags & BIN_FLAG_MAGIC))

/* arrays that get malloced at startup */
extern Port* erts_port;
extern erts_smp_atomic_t erts_ports_alive;

extern Uint erts_max_ports;
extern Uint erts_port_tab_index_mask;
extern erts_smp_atomic_t erts_ports_snapshot;
extern erts_smp_atomic_t erts_dead_ports_ptr;

ERTS_GLB_INLINE void erts_may_save_closed_port(Port *prt);

#if ERTS_GLB_INLINE_INCL_FUNC_DEF

ERTS_GLB_INLINE void erts_may_save_closed_port(Port *prt)
{
    ERTS_SMP_LC_ASSERT(erts_smp_lc_spinlock_is_locked(&prt->state_lck));
    if (prt->snapshot != erts_smp_atomic_read(&erts_ports_snapshot)) {
	/* Dead ports are added from the end of the snapshot buffer */
	Eterm* tombstone = (Eterm*) erts_smp_atomic_addtest(&erts_dead_ports_ptr,
							    -(long)sizeof(Eterm));
	ASSERT(tombstone+1 != NULL);
	ASSERT(prt->snapshot == (Uint32) erts_smp_atomic_read(&erts_ports_snapshot) - 1);
	*tombstone = prt->id;
    }
    /*else no ongoing snapshot or port was already included or created after snapshot */
}

#endif

/* controls warning mapping in error_logger */

extern Eterm node_cookie;
extern erts_smp_atomic_t erts_bytes_out;	/* no bytes written out */
extern erts_smp_atomic_t erts_bytes_in;		/* no bytes sent into the system */
extern Uint display_items;	/* no of items to display in traces etc */
extern Uint display_loads;	/* print info about loaded modules */

extern int erts_backtrace_depth;
extern erts_smp_atomic_t erts_max_gen_gcs;

extern int erts_disable_tolerant_timeofday;

#ifdef HYBRID

/* Message Area heap pointers */
extern Eterm *global_heap;             /* Heap start */
extern Eterm *global_hend;             /* Heap end */
extern Eterm *global_htop;             /* Heap top (heap pointer) */
extern Eterm *global_saved_htop;       /* Saved heap top (heap pointer) */
extern Uint   global_heap_sz;          /* Heap size, in words */
extern Eterm *global_old_heap;         /* Old generation */
extern Eterm *global_old_hend;
extern ErlOffHeap erts_global_offheap; /* Global MSO (OffHeap) list */

extern Uint16 global_gen_gcs;
extern Uint16 global_max_gen_gcs;
extern Uint   global_gc_flags;

#ifdef INCREMENTAL
#define ACTIVATE(p)
#define DEACTIVATE(p)
#define IS_ACTIVE(p) 1

#define INC_ACTIVATE(p) do {                                           \
    if ((p)->active) {                                                 \
        if ((p)->active_next != NULL) {                                \
            (p)->active_next->active_prev = (p)->active_prev;          \
            if ((p)->active_prev) {                                    \
                (p)->active_prev->active_next = (p)->active_next;      \
            } else {                                                   \
                inc_active_proc = (p)->active_next;                    \
            }                                                          \
            inc_active_last->active_next = (p);                        \
            (p)->active_next = NULL;                                   \
            (p)->active_prev = inc_active_last;                        \
            inc_active_last = (p);                                     \
        }                                                              \
    } else {                                                           \
        (p)->active_next = NULL;                                       \
        (p)->active_prev = inc_active_last;                            \
        if (inc_active_last) {                                         \
            inc_active_last->active_next = (p);                        \
        } else {                                                       \
            inc_active_proc = (p);                                     \
        }                                                              \
        inc_active_last = (p);                                         \
        (p)->active = 1;                                               \
    }                                                                  \
} while(0);

#define INC_DEACTIVATE(p) do {                                         \
    ASSERT((p)->active == 1);                                          \
    if ((p)->active_next == NULL) {                                    \
        inc_active_last = (p)->active_prev;                            \
    } else {                                                           \
        (p)->active_next->active_prev = (p)->active_prev;              \
    }                                                                  \
    if ((p)->active_prev == NULL) {                                    \
        inc_active_proc = (p)->active_next;                            \
    } else {                                                           \
        (p)->active_prev->active_next = (p)->active_next;              \
    }                                                                  \
    (p)->active = 0;                                                   \
} while(0);

#define INC_IS_ACTIVE(p)  ((p)->active != 0)

#else
extern Eterm *global_old_htop;
extern Eterm *global_high_water;
#define ACTIVATE(p)   (p)->active = 1;
#define DEACTIVATE(p) (p)->active = 0;
#define IS_ACTIVE(p)  ((p)->active != 0)
#define INC_ACTIVATE(p)
#define INC_IS_ACTIVE(p) 1
#endif /* INCREMENTAL */

#else
#  define ACTIVATE(p)
#  define DEACTIVATE(p)
#  define IS_ACTIVE(p) 1
#  define INC_ACTIVATE(p)
#endif /* HYBRID */

#ifdef HYBRID
extern Uint global_heap_min_sz;
#endif

extern int bif_reductions;      /* reductions + fcalls (when doing call_bif) */
extern int stackdump_on_exit;

/*
 * Here is an implementation of a lightweiht stack.
 *
 * Use it like this:
 *
 * DECLARE_ESTACK(Stack)	(At the start of a block)
 * ...
 * ESTACK_PUSH(Stack, Term)
 * ...
 * if (ESTACK_ISEMPTY(Stack)) {
 *    Stack is empty
 * } else {
 *    Term = ESTACK_POP(Stack);
 *    Process popped Term here
 * }
 * ...
 * DESTROY_ESTACK(Stack)
 */


void erl_grow_stack(Eterm** start, Eterm** sp, Eterm** end);
#define ESTK_CONCAT(a,b) a##b
#define ESTK_SUBSCRIPT(s,i) *((Eterm *)((byte *)ESTK_CONCAT(s,_start) + (i)))
#define DEF_ESTACK_SIZE (16)

#define DECLARE_ESTACK(s)						\
    Eterm ESTK_CONCAT(s,_default_stack)[DEF_ESTACK_SIZE];		\
    Eterm* ESTK_CONCAT(s,_start) = ESTK_CONCAT(s,_default_stack);	\
    Eterm* ESTK_CONCAT(s,_sp) = ESTK_CONCAT(s,_start);			\
    Eterm* ESTK_CONCAT(s,_end) = ESTK_CONCAT(s,_start) + DEF_ESTACK_SIZE

#define DESTROY_ESTACK(s)						\
do {									\
    if (ESTK_CONCAT(s,_start) != ESTK_CONCAT(s,_default_stack)) {	\
	erts_free(ERTS_ALC_T_ESTACK, ESTK_CONCAT(s,_start));		\
    }									\
} while(0)

#define ESTACK_PUSH(s, x)						\
do {									\
    if (ESTK_CONCAT(s,_sp) == ESTK_CONCAT(s,_end)) {			\
	erl_grow_stack(&ESTK_CONCAT(s,_start), &ESTK_CONCAT(s,_sp),	\
	               &ESTK_CONCAT(s,_end));				\
    }									\
    *ESTK_CONCAT(s,_sp)++ = (x);					\
} while(0)

#define ESTACK_PUSH2(s, x, y)						\
do {									\
    if (ESTK_CONCAT(s,_sp) > ESTK_CONCAT(s,_end) - 2) {			\
	erl_grow_stack(&ESTK_CONCAT(s,_start), &ESTK_CONCAT(s,_sp),	\
		&ESTK_CONCAT(s,_end));	\
    }									\
    *ESTK_CONCAT(s,_sp)++ = (x);					\
    *ESTK_CONCAT(s,_sp)++ = (y);					\
} while(0)

#define ESTACK_PUSH3(s, x, y, z)					\
do {									\
    if (ESTK_CONCAT(s,_sp) > ESTK_CONCAT(s,_end) - 3) {			\
	erl_grow_stack(&ESTK_CONCAT(s,_start), &ESTK_CONCAT(s,_sp),	\
		&ESTK_CONCAT(s,_end));					\
    }									\
    *ESTK_CONCAT(s,_sp)++ = (x);					\
    *ESTK_CONCAT(s,_sp)++ = (y);					\
    *ESTK_CONCAT(s,_sp)++ = (z);					\
} while(0)

#define ESTACK_COUNT(s) (ESTK_CONCAT(s,_sp) - ESTK_CONCAT(s,_start))

#define ESTACK_ISEMPTY(s) (ESTK_CONCAT(s,_sp) == ESTK_CONCAT(s,_start))
#define ESTACK_POP(s) (*(--ESTK_CONCAT(s,_sp)))


/* port status flags */

#define ERTS_PORT_SFLG_CONNECTED	((Uint32) (1 <<  0))
/* Port have begun exiting */
#define ERTS_PORT_SFLG_EXITING		((Uint32) (1 <<  1))
/* Distribution port */
#define ERTS_PORT_SFLG_DISTRIBUTION	((Uint32) (1 <<  2))
#define ERTS_PORT_SFLG_BINARY_IO	((Uint32) (1 <<  3))
#define ERTS_PORT_SFLG_SOFT_EOF		((Uint32) (1 <<  4))
/* Flow control */
#define ERTS_PORT_SFLG_PORT_BUSY	((Uint32) (1 <<  5))
/* Port is closing (no i/o accepted) */
#define ERTS_PORT_SFLG_CLOSING		((Uint32) (1 <<  6))
/* Send a closed message when terminating */
#define ERTS_PORT_SFLG_SEND_CLOSED	((Uint32) (1 <<  7))
/* Line orinted io on port */  
#define ERTS_PORT_SFLG_LINEBUF_IO	((Uint32) (1 <<  8))
/* Immortal port (only certain system ports) */
#define ERTS_PORT_SFLG_IMMORTAL		((Uint32) (1 <<  9))
#define ERTS_PORT_SFLG_FREE		((Uint32) (1 << 10))
#define ERTS_PORT_SFLG_FREE_SCHEDULED	((Uint32) (1 << 11))
#define ERTS_PORT_SFLG_INITIALIZING	((Uint32) (1 << 12))
/* Port uses port specific locking (opposed to driver specific locking) */
#define ERTS_PORT_SFLG_PORT_SPECIFIC_LOCK ((Uint32) (1 << 13))
#define ERTS_PORT_SFLG_INVALID		((Uint32) (1 << 14))
#ifdef DEBUG
/* Only debug: make sure all flags aren't cleared unintentionally */
#define ERTS_PORT_SFLG_PORT_DEBUG	((Uint32) (1 << 31))
#endif

/* Combinations of port status flags */ 
#define ERTS_PORT_SFLGS_DEAD						\
  (ERTS_PORT_SFLG_FREE							\
   | ERTS_PORT_SFLG_FREE_SCHEDULED					\
   | ERTS_PORT_SFLG_INITIALIZING)
#define ERTS_PORT_SFLGS_INVALID_DRIVER_LOOKUP				\
  (ERTS_PORT_SFLGS_DEAD | ERTS_PORT_SFLG_INVALID)
#define ERTS_PORT_SFLGS_INVALID_LOOKUP					\
  (ERTS_PORT_SFLGS_INVALID_DRIVER_LOOKUP				\
   | ERTS_PORT_SFLG_CLOSING)
#define ERTS_PORT_SFLGS_INVALID_TRACER_LOOKUP				\
  (ERTS_PORT_SFLGS_INVALID_LOOKUP					\
   | ERTS_PORT_SFLG_PORT_BUSY						\
   | ERTS_PORT_SFLG_DISTRIBUTION)

/* binary.c */

void erts_emasculate_writable_binary(ProcBin* pb);
Eterm erts_new_heap_binary(Process *p, byte *buf, int len, byte** datap);
Eterm erts_new_mso_binary(Process*, byte*, int);
Eterm new_binary(Process*, byte*, int);
Eterm erts_realloc_binary(Eterm bin, size_t size);
void erts_cleanup_mso(ProcBin* pb);

/* erl_bif_info.c */

void erts_bif_info_init(void);

/* bif.c */
Eterm erts_make_ref(Process *);
Eterm erts_make_ref_in_buffer(Eterm buffer[REF_THING_SIZE]);
void erts_queue_monitor_message(Process *,
				ErtsProcLocks*,
				Eterm,
				Eterm,
				Eterm,
				Eterm);
void erts_init_bif(void);

/* erl_bif_port.c */

/* erl_bif_trace.c */
void erts_system_monitor_clear(Process *c_p);
void erts_system_profile_clear(Process *c_p);

/* beam_load.c */
int erts_load_module(Process *c_p, ErtsProcLocks c_p_locks,
		     Eterm group_leader, Eterm* mod, byte* code, int size);
void init_load(void);
Eterm* find_function_from_pc(Eterm* pc);
Eterm erts_module_info_0(Process* p, Eterm module);
Eterm erts_module_info_1(Process* p, Eterm module, Eterm what);
Eterm erts_make_stub_module(Process* p, Eterm Mod, Eterm Beam, Eterm Info);

/* break.c */
void init_break_handler(void);
void erts_set_ignore_break(void);
void erts_replace_intr(void);
void process_info(int, void *);
void print_process_info(int, void *, Process*);
void info(int, void *);
void loaded(int, void *);

/* config.c */

__decl_noreturn void __noreturn erl_exit(int n, char*, ...);
__decl_noreturn void __noreturn erl_exit0(char *, int, int n, char*, ...);
void erl_error(char*, va_list);

#define ERL_EXIT0(n,f)		erl_exit0(__FILE__, __LINE__, n, f)
#define ERL_EXIT1(n,f,a)	erl_exit0(__FILE__, __LINE__, n, f, a)
#define ERL_EXIT2(n,f,a,b)	erl_exit0(__FILE__, __LINE__, n, f, a, b)
#define ERL_EXIT3(n,f,a,b,c)	erl_exit0(__FILE__, __LINE__, n, f, a, b, c)

/* copy.c */
void init_copy(void);
Eterm copy_object(Eterm, Process*);
Uint size_object(Eterm);
Eterm copy_struct(Eterm, Uint, Eterm**, ErlOffHeap*);
Eterm copy_shallow(Eterm*, Uint, Eterm**, ErlOffHeap*);

#ifdef HYBRID
#define RRMA_DEFAULT_SIZE 256
#define RRMA_STORE(p,ptr,src) do {                                      \
  ASSERT((p)->rrma != NULL);                                            \
  ASSERT((p)->rrsrc != NULL);                                           \
  (p)->rrma[(p)->nrr] = (ptr);                                          \
  (p)->rrsrc[(p)->nrr++] = (src);                                       \
  if ((p)->nrr == (p)->rrsz)                                            \
  {                                                                     \
      (p)->rrsz *= 2;                                                   \
      (p)->rrma = (Eterm *) erts_realloc(ERTS_ALC_T_ROOTSET,            \
                                         (void*)(p)->rrma,              \
                                         sizeof(Eterm) * (p)->rrsz);    \
      (p)->rrsrc = (Eterm **) erts_realloc(ERTS_ALC_T_ROOTSET,          \
                                           (void*)(p)->rrsrc,           \
                                            sizeof(Eterm) * (p)->rrsz); \
  }                                                                     \
} while(0)

/* Note that RRMA_REMOVE decreases the given index after deletion. 
 * This is done so that a loop with an increasing index can call
 * remove without having to decrease the index to see the element
 * placed in the hole after the deleted element.
 */
#define RRMA_REMOVE(p,index) do {                                 \
        p->rrsrc[index] = p->rrsrc[--p->nrr];                     \
        p->rrma[index--] = p->rrma[p->nrr];                       \
    } while(0);


/* The MessageArea STACKs are used while copying messages to the
 * message area.
 */
#define MA_STACK_EXTERNAL_DECLARE(type,_s_)     \
    typedef type ma_##_s_##_type;               \
    extern ma_##_s_##_type *ma_##_s_##_stack;   \
    extern Uint ma_##_s_##_top;                 \
    extern Uint ma_##_s_##_size;

#define MA_STACK_DECLARE(_s_)                                           \
    ma_##_s_##_type *ma_##_s_##_stack; Uint ma_##_s_##_top; Uint ma_##_s_##_size;

#define MA_STACK_ALLOC(_s_) do {                                        \
    ma_##_s_##_top = 0;                                                 \
    ma_##_s_##_size = 512;                                              \
    ma_##_s_##_stack = (ma_##_s_##_type*)erts_alloc(ERTS_ALC_T_OBJECT_STACK, \
                       sizeof(ma_##_s_##_type) * ma_##_s_##_size);      \
} while(0)


#define MA_STACK_PUSH(_s_,val) do {                                     \
    ma_##_s_##_stack[ma_##_s_##_top++] = (val);                         \
    if (ma_##_s_##_top == ma_##_s_##_size)                              \
    {                                                                   \
        ma_##_s_##_size *= 2;                                           \
        ma_##_s_##_stack =                                              \
            (ma_##_s_##_type*) erts_realloc(ERTS_ALC_T_OBJECT_STACK,    \
                                           (void*)ma_##_s_##_stack,     \
                            sizeof(ma_##_s_##_type) * ma_##_s_##_size); \
    }                                                                   \
} while(0)

#define MA_STACK_POP(_s_) (ma_##_s_##_top != 0 ? ma_##_s_##_stack[--ma_##_s_##_top] : 0)
#define MA_STACK_TOP(_s_) (ma_##_s_##_stack[ma_##_s_##_top - 1])
#define MA_STACK_UPDATE(_s_,offset,value)                               \
  *(ma_##_s_##_stack[ma_##_s_##_top - 1] + (offset)) = (value)
#define MA_STACK_SIZE(_s_) (ma_##_s_##_top)
#define MA_STACK_ELM(_s_,i) ma_##_s_##_stack[i]

MA_STACK_EXTERNAL_DECLARE(Eterm,src);
MA_STACK_EXTERNAL_DECLARE(Eterm*,dst);
MA_STACK_EXTERNAL_DECLARE(Uint,offset);


#ifdef INCREMENTAL
extern Eterm *ma_pending_stack;
extern Uint ma_pending_top;
extern Uint ma_pending_size;

#define NO_COPY(obj) (IS_CONST(obj) ||                         \
                      (((ptr_val(obj) >= global_heap) &&       \
                        (ptr_val(obj) < global_htop)) ||       \
                       ((ptr_val(obj) >= inc_fromspc) &&       \
                        (ptr_val(obj) < inc_fromend)) ||       \
                       ((ptr_val(obj) >= global_old_heap) &&   \
                        (ptr_val(obj) < global_old_hend))))

#else

#define NO_COPY(obj) (IS_CONST(obj) ||                        \
                      (((ptr_val(obj) >= global_heap) &&      \
                        (ptr_val(obj) < global_htop)) ||      \
                       ((ptr_val(obj) >= global_old_heap) &&  \
                        (ptr_val(obj) < global_old_hend))))

#endif /* INCREMENTAL */

#define LAZY_COPY(from,obj) do {                     \
  if (!NO_COPY(obj)) {                               \
      BM_LAZY_COPY_START;                            \
      BM_COUNT(messages_copied);                     \
      obj = copy_struct_lazy(from,obj,0);            \
      BM_LAZY_COPY_STOP;                             \
  }                                                  \
} while(0)

Eterm copy_struct_lazy(Process*, Eterm, Uint);

#endif /* HYBRID */

/* Utilities */
extern void erts_delete_nodes_monitors(Process *, ErtsProcLocks);
extern Eterm erts_monitor_nodes(Process *, Eterm, Eterm);
extern Eterm erts_processes_monitoring_nodes(Process *);
extern int erts_do_net_exits(DistEntry*, Eterm);
extern int distribution_info(int, void *);
extern int is_node_name_atom(Eterm a);

extern int erts_net_message(Port *, DistEntry *, byte *, int, byte *, int);

extern void init_dist(void);
extern int stop_dist(void);

void erl_progressf(char* format, ...);

#ifdef MESS_DEBUG
void print_pass_through(int, byte*, int);
#endif

/* beam_emu.c */
int catchlevel(Process*);
void init_emulator(_VOID_);
void process_main(void);
Eterm build_stacktrace(Process* c_p, Eterm exc);
Eterm expand_error_value(Process* c_p, Uint freason, Eterm Value);

/* erl_init.c */

typedef struct {
    Eterm delay_time;
    int context_reds;
    int input_reds;
} ErtsModifiedTimings;

extern Export *erts_delay_trap;
extern int erts_modified_timing_level;
extern ErtsModifiedTimings erts_modified_timings[];
#define ERTS_USE_MODIFIED_TIMING() \
  (erts_modified_timing_level >= 0)
#define ERTS_MODIFIED_TIMING_DELAY \
  (erts_modified_timings[erts_modified_timing_level].delay_time)
#define ERTS_MODIFIED_TIMING_CONTEXT_REDS \
  (erts_modified_timings[erts_modified_timing_level].context_reds)
#define ERTS_MODIFIED_TIMING_INPUT_REDS \
  (erts_modified_timings[erts_modified_timing_level].input_reds)

extern Eterm erts_error_logger_warnings;
extern int erts_initialized;
extern int erts_compat_rel;
extern int erts_use_sender_punish;
void erts_short_init(void);
void erl_start(int, char**);
void erts_usage(void);
Eterm erts_preloaded(Process* p);
/* erl_md5.c */

typedef struct {
    Uint32 state[4];		/* state (ABCD) */
    Uint32 count[2];		/* number of bits, modulo 2^64 (lsb first) */
    unsigned char buffer[64];	/* input buffer */
} MD5_CTX;

void MD5Init(MD5_CTX *);
void MD5Update(MD5_CTX *, unsigned char *, unsigned int);
void MD5Final(unsigned char [16], MD5_CTX *);

/* ggc.c */


typedef struct {
    Uint garbage_collections;
    Uint reclaimed;
} ErtsGCInfo;

void erts_gc_info(ErtsGCInfo *gcip);
void erts_init_gc(void);
int erts_garbage_collect(Process*, int, Eterm*, int);
void erts_garbage_collect_hibernate(Process* p);
Eterm erts_gc_after_bif_call(Process* p, Eterm result, Eterm* regs, Uint arity);
void erts_garbage_collect_literals(Process* p, Eterm* literals, Uint lit_size);
Uint erts_next_heap_size(Uint, Uint);
Eterm erts_heap_sizes(Process* p);

void erts_offset_off_heap(ErlOffHeap *, Sint, Eterm*, Eterm*);
void erts_offset_heap_ptr(Eterm*, Uint, Sint, Eterm*, Eterm*);
void erts_offset_heap(Eterm*, Uint, Sint, Eterm*, Eterm*);

#ifdef HYBRID
int erts_global_garbage_collect(Process*, int, Eterm*, int);
#endif

/* io.c */

struct erl_drv_port_data_lock {
    erts_mtx_t mtx;
    erts_atomic_t refc;
};

typedef struct {
    char *name;
    char *driver_name;
} ErtsPortNames;

#define ERTS_SPAWN_DRIVER 1
#define ERTS_SPAWN_EXECUTABLE 2
#define ERTS_SPAWN_ANY (ERTS_SPAWN_DRIVER | ERTS_SPAWN_EXECUTABLE)

int erts_add_driver_entry(ErlDrvEntry *drv, DE_Handle *handle, int driver_list_locked);
void erts_destroy_driver(erts_driver_t *drv);
void erts_wake_process_later(Port*, Process*);
int erts_open_driver(erts_driver_t*, Eterm, char*, SysDriverOpts*, int *);
int erts_is_port_ioq_empty(Port *);
void erts_terminate_port(Port *);
void close_port(Eterm);
void init_io(void);
void cleanup_io(void);
void erts_do_exit_port(Port *, Eterm, Eterm);
void erts_port_command(Process *, Eterm, Port *, Eterm);
Eterm erts_port_control(Process*, Port*, Uint, Eterm);
int erts_write_to_port(Eterm caller_id, Port *p, Eterm list);
void print_port_info(int, void *, int);
void erts_raw_port_command(Port*, byte*, Uint);
void driver_report_exit(int, int);
LineBuf* allocate_linebuf(int);
int async_ready(Port *, void*);
Sint erts_test_next_port(int, Uint);
ErtsPortNames *erts_get_port_names(Eterm);
void erts_free_port_names(ErtsPortNames *);
Uint erts_port_ioq_size(Port *pp);
void erts_stale_drv_select(Eterm, ErlDrvEvent, int, int);
void erts_port_cleanup(Port *);
void erts_fire_port_monitor(Port *prt, Eterm ref);
#ifdef ERTS_SMP
void erts_smp_xports_unlock(Port *);
#endif

#if defined(ERTS_SMP) && defined(ERTS_ENABLE_LOCK_CHECK)
int erts_lc_is_port_locked(Port *);
#endif

ERTS_GLB_INLINE void erts_smp_port_state_lock(Port*);
ERTS_GLB_INLINE void erts_smp_port_state_unlock(Port*);

ERTS_GLB_INLINE int erts_smp_port_trylock(Port *prt);
ERTS_GLB_INLINE void erts_smp_port_lock(Port *prt);
ERTS_GLB_INLINE void erts_smp_port_unlock(Port *prt);

#if ERTS_GLB_INLINE_INCL_FUNC_DEF

ERTS_GLB_INLINE void
erts_smp_port_state_lock(Port* prt)
{
#ifdef ERTS_SMP
    erts_smp_spin_lock(&prt->state_lck);
#endif
}

ERTS_GLB_INLINE void
erts_smp_port_state_unlock(Port *prt)
{
#ifdef ERTS_SMP
    erts_smp_spin_unlock(&prt->state_lck);
#endif
}


ERTS_GLB_INLINE int
erts_smp_port_trylock(Port *prt)
{
#ifdef ERTS_SMP
    int res;

    ASSERT(erts_smp_atomic_read(&prt->refc) > 0);
    erts_smp_atomic_inc(&prt->refc);
    res = erts_smp_mtx_trylock(prt->lock);
    if (res == EBUSY) {
	erts_smp_atomic_dec(&prt->refc);
    }

    return res;
#else /* !ERTS_SMP */
    return 0;
#endif
}

ERTS_GLB_INLINE void
erts_smp_port_lock(Port *prt)
{
#ifdef ERTS_SMP
    ASSERT(erts_smp_atomic_read(&prt->refc) > 0);
    erts_smp_atomic_inc(&prt->refc);
    erts_smp_mtx_lock(prt->lock);
#endif
}

ERTS_GLB_INLINE void
erts_smp_port_unlock(Port *prt)
{
#ifdef ERTS_SMP
    long refc;
    refc = erts_smp_atomic_dectest(&prt->refc);
    ASSERT(refc >= 0);
    if (refc == 0)
	erts_port_cleanup(prt);
    else
	erts_smp_mtx_unlock(prt->lock);
#endif
}

#endif /* #if ERTS_GLB_INLINE_INCL_FUNC_DEF */


#define ERTS_INVALID_PORT_OPT(PP, ID, FLGS) \
  (!(PP) || ((PP)->status & (FLGS)) || (PP)->id != (ID))

/* port lookup */

#define INVALID_PORT(PP, ID) \
  ERTS_INVALID_PORT_OPT((PP), (ID), ERTS_PORT_SFLGS_INVALID_LOOKUP)

/* Invalidate trace port if anything suspicious, for instance
 * that the port is a distribution port or it is busy.
 */
#define INVALID_TRACER_PORT(PP, ID)					\
  ERTS_INVALID_PORT_OPT((PP), (ID), ERTS_PORT_SFLGS_INVALID_TRACER_LOOKUP)

#define ERTS_PORT_SCHED_ID(P, ID) \
  ((Uint) erts_prtsd_set((P), ERTS_PSD_SCHED_ID, (void *) (ID)))

#ifdef ERTS_SMP
Port *erts_de2port(DistEntry *, Process *, ErtsProcLocks);
#endif

#define erts_id2port(ID, P, PL) \
  erts_id2port_sflgs((ID), (P), (PL), ERTS_PORT_SFLGS_INVALID_LOOKUP)

ERTS_GLB_INLINE Port*erts_id2port_sflgs(Eterm, Process *, ErtsProcLocks, Uint32);
ERTS_GLB_INLINE void erts_port_release(Port *);
ERTS_GLB_INLINE Port*erts_drvport2port(ErlDrvPort);
ERTS_GLB_INLINE Port*erts_drvportid2port(Eterm);
ERTS_GLB_INLINE Uint32 erts_portid2status(Eterm id);
ERTS_GLB_INLINE int erts_is_port_alive(Eterm id);
ERTS_GLB_INLINE int erts_is_valid_tracer_port(Eterm id);
ERTS_GLB_INLINE void erts_port_status_bandor_set(Port *, Uint32, Uint32);
ERTS_GLB_INLINE void erts_port_status_band_set(Port *, Uint32);
ERTS_GLB_INLINE void erts_port_status_bor_set(Port *, Uint32);
ERTS_GLB_INLINE void erts_port_status_set(Port *, Uint32);
ERTS_GLB_INLINE Uint32 erts_port_status_get(Port *);

#if ERTS_GLB_INLINE_INCL_FUNC_DEF

ERTS_GLB_INLINE Port*
erts_id2port_sflgs(Eterm id, Process *c_p, ErtsProcLocks c_p_locks, Uint32 sflgs)
{
#ifdef ERTS_SMP
    int no_proc_locks = !c_p || !c_p_locks;
#endif
    Port *prt;

    if (is_not_internal_port(id))
	return NULL;

    prt = &erts_port[internal_port_index(id)];

    erts_smp_port_state_lock(prt);
    if (ERTS_INVALID_PORT_OPT(prt, id, sflgs)) {
	erts_smp_port_state_unlock(prt);
	prt = NULL;
    }
#ifdef ERTS_SMP
    else {
	erts_smp_atomic_inc(&prt->refc);
	erts_smp_port_state_unlock(prt);

	if (no_proc_locks)
	    erts_smp_mtx_lock(prt->lock);
	else if (erts_smp_mtx_trylock(prt->lock) == EBUSY) {
	    /* Unlock process locks, and acquire locks in lock order... */
	    erts_smp_proc_unlock(c_p, c_p_locks);
	    erts_smp_mtx_lock(prt->lock);
	    erts_smp_proc_lock(c_p, c_p_locks);
	}

	/* The id may not have changed... */
	ERTS_SMP_LC_ASSERT(prt->id == id);
	/* ... but status may have... */
	if (prt->status & sflgs) {
	    erts_smp_port_unlock(prt); /* Also decrements refc... */
	    prt = NULL;
	}
    }
#endif

    return prt;
}

ERTS_GLB_INLINE void
erts_port_release(Port *prt)
{
#ifdef ERTS_SMP
    erts_smp_port_unlock(prt);
#else
    if (prt->status & ERTS_PORT_SFLGS_DEAD)
	erts_port_cleanup(prt);
#endif
}

ERTS_GLB_INLINE Port*
erts_drvport2port(ErlDrvPort drvport)
{
    int ix = (int) drvport;
    if (ix < 0 || erts_max_ports <= ix)
	return NULL;
    if (erts_port[ix].status & ERTS_PORT_SFLGS_INVALID_DRIVER_LOOKUP)
	return NULL;
    ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(&erts_port[ix]));
    return &erts_port[ix];
}

ERTS_GLB_INLINE Port*
erts_drvportid2port(Eterm id)
{
    int ix;
    if (is_not_internal_port(id))
	return NULL;
    ix = (int) internal_port_index(id);
    if (erts_max_ports <= ix)
	return NULL;
    if (erts_port[ix].status & ERTS_PORT_SFLGS_INVALID_DRIVER_LOOKUP)
	return NULL;
    if (erts_port[ix].id != id)
	return NULL;
    ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(&erts_port[ix]));
    return &erts_port[ix];
}

ERTS_GLB_INLINE Uint32
erts_portid2status(Eterm id)
{
    if (is_not_internal_port(id))
	return ERTS_PORT_SFLG_INVALID;
    else {
	Uint32 status;
	int ix = internal_port_index(id);
	if (erts_max_ports <= ix)
	    return ERTS_PORT_SFLG_INVALID;
	erts_smp_port_state_lock(&erts_port[ix]);
	if (erts_port[ix].id == id)
	    status = erts_port[ix].status;
	else
	    status = ERTS_PORT_SFLG_INVALID;
	erts_smp_port_state_unlock(&erts_port[ix]);
	return status;
    }
}

ERTS_GLB_INLINE int
erts_is_port_alive(Eterm id)
{
    return !(erts_portid2status(id) & (ERTS_PORT_SFLG_INVALID
				       | ERTS_PORT_SFLGS_DEAD));
}

ERTS_GLB_INLINE int
erts_is_valid_tracer_port(Eterm id)
{
    return !(erts_portid2status(id) & ERTS_PORT_SFLGS_INVALID_TRACER_LOOKUP);
}

ERTS_GLB_INLINE void erts_port_status_bandor_set(Port *prt,
						 Uint32 band_status,
						 Uint32 bor_status)
{
    ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(prt));
    erts_smp_port_state_lock(prt);
    prt->status &= band_status;
    prt->status |= bor_status;
    erts_smp_port_state_unlock(prt);
}

ERTS_GLB_INLINE void erts_port_status_band_set(Port *prt, Uint32 status)
{
    ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(prt));
    erts_smp_port_state_lock(prt);
    prt->status &= status;
    erts_smp_port_state_unlock(prt);
}

ERTS_GLB_INLINE void erts_port_status_bor_set(Port *prt, Uint32 status)
{
    ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(prt));
    erts_smp_port_state_lock(prt);
    prt->status |= status;
    erts_smp_port_state_unlock(prt);
}

ERTS_GLB_INLINE void erts_port_status_set(Port *prt, Uint32 status)
{
    ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(prt));
    erts_smp_port_state_lock(prt);
    prt->status = status;
    erts_smp_port_state_unlock(prt);
}

ERTS_GLB_INLINE Uint32 erts_port_status_get(Port *prt)
{
    Uint32 res;
    erts_smp_port_state_lock(prt);
    res = prt->status;
    erts_smp_port_state_unlock(prt);
    return res;
}
#endif /* #if ERTS_GLB_INLINE_INCL_FUNC_DEF */

/* erl_drv_thread.c */
void erl_drv_thr_init(void);

/* time.c */

ERTS_GLB_INLINE long do_time_read_and_reset(void);
#ifdef ERTS_TIMER_THREAD
ERTS_GLB_INLINE int next_time(void);
ERTS_GLB_INLINE void bump_timer(long);
#else
int next_time(void);
void bump_timer(long);
extern erts_smp_atomic_t do_time;	/* set at clock interrupt */
ERTS_GLB_INLINE void do_time_add(long);
#endif

#if ERTS_GLB_INLINE_INCL_FUNC_DEF

#ifdef ERTS_TIMER_THREAD
ERTS_GLB_INLINE long do_time_read_and_reset(void) { return 0; }
ERTS_GLB_INLINE int next_time(void) { return -1; }
ERTS_GLB_INLINE void bump_timer(long ignore) { }
#else
ERTS_GLB_INLINE long do_time_read_and_reset(void)
{
    return erts_smp_atomic_xchg(&do_time, 0L);
}
ERTS_GLB_INLINE void do_time_add(long elapsed)
{
    erts_smp_atomic_add(&do_time, elapsed);
}
#endif

#endif /* #if ERTS_GLB_INLINE_INCL_FUNC_DEF */

void init_time(void);
void erl_set_timer(ErlTimer*, ErlTimeoutProc, ErlCancelProc, void*, Uint);
void erl_cancel_timer(ErlTimer*);
Uint time_left(ErlTimer *);

Uint erts_timer_wheel_memory_size(void);

#if (defined(HAVE_GETHRVTIME) || defined(HAVE_CLOCK_GETTIME))
#  ifndef HAVE_ERTS_NOW_CPU
#    define HAVE_ERTS_NOW_CPU
#    ifdef HAVE_GETHRVTIME
#      define erts_start_now_cpu() sys_start_hrvtime()
#      define erts_stop_now_cpu()  sys_stop_hrvtime()
#    endif
#  endif
void erts_get_now_cpu(Uint* megasec, Uint* sec, Uint* microsec);
#endif

void erts_get_timeval(SysTimeval *tv);
long erts_get_time(void);

extern SysTimeval erts_first_emu_time;

void erts_get_emu_time(SysTimeval *);

ERTS_GLB_INLINE int erts_cmp_timeval(SysTimeval *t1p, SysTimeval *t2p);

#if ERTS_GLB_INLINE_INCL_FUNC_DEF

ERTS_GLB_INLINE int
erts_cmp_timeval(SysTimeval *t1p, SysTimeval *t2p)
{
    if (t1p->tv_sec == t2p->tv_sec) {
	if (t1p->tv_usec < t2p->tv_usec)
	    return -1;
	else if (t1p->tv_usec > t2p->tv_usec)
	    return 1;
	return 0;
    }
    return t1p->tv_sec < t2p->tv_sec ? -1 : 1;
}

#endif

#ifdef DEBUG
void p_slpq(_VOID_);
#endif

/* utils.c */

/*
 * To be used to silence unused result warnings, but do not abuse it.
 */
void erts_silence_warn_unused_result(long unused);

void erts_cleanup_offheap(ErlOffHeap *offheap);
void erts_cleanup_externals(ExternalThing *);

Uint erts_fit_in_bits(Uint);
int list_length(Eterm);
Export* erts_find_function(Eterm, Eterm, unsigned int);
int erts_is_builtin(Eterm, Eterm, int);
Uint32 make_broken_hash(Eterm);
Uint32 block_hash(byte *, unsigned, Uint32);
Uint32 make_hash2(Eterm);
Uint32 make_hash(Eterm);


Eterm erts_bld_atom(Uint **hpp, Uint *szp, char *str);
Eterm erts_bld_uint(Uint **hpp, Uint *szp, Uint ui);
Eterm erts_bld_uint64(Uint **hpp, Uint *szp, Uint64 ui64);
Eterm erts_bld_sint64(Uint **hpp, Uint *szp, Sint64 si64);
Eterm erts_bld_cons(Uint **hpp, Uint *szp, Eterm car, Eterm cdr);
Eterm erts_bld_tuple(Uint **hpp, Uint *szp, Uint arity, ...);
Eterm erts_bld_tuplev(Uint **hpp, Uint *szp, Uint arity, Eterm terms[]);
Eterm erts_bld_string_n(Uint **hpp, Uint *szp, const char *str, Sint len);
#define erts_bld_string(hpp,szp,str) erts_bld_string_n(hpp,szp,str,strlen(str))
Eterm erts_bld_list(Uint **hpp, Uint *szp, Sint length, Eterm terms[]);
Eterm erts_bld_2tup_list(Uint **hpp, Uint *szp,
			 Sint length, Eterm terms1[], Uint terms2[]);
Eterm
erts_bld_atom_uint_2tup_list(Uint **hpp, Uint *szp,
			     Sint length, Eterm atoms[], Uint uints[]);
Eterm
erts_bld_atom_2uint_3tup_list(Uint **hpp, Uint *szp, Sint length,
			      Eterm atoms[], Uint uints1[], Uint uints2[]);

Eterm store_external_or_ref_in_proc_(Process *, Eterm);
Eterm store_external_or_ref_(Uint **, ExternalThing **, Eterm);

#define NC_HEAP_SIZE(NC) \
 (ASSERT_EXPR(is_node_container((NC))), \
  IS_CONST((NC)) ? 0 : (thing_arityval(*boxed_val((NC))) + 1))
#define STORE_NC(Hpp, ETpp, NC) \
 (ASSERT_EXPR(is_node_container((NC))), \
  IS_CONST((NC)) ? (NC) : store_external_or_ref_((Hpp), (ETpp), (NC)))
#define STORE_NC_IN_PROC(Pp, NC) \
 (ASSERT_EXPR(is_node_container((NC))), \
  IS_CONST((NC)) ? (NC) : store_external_or_ref_in_proc_((Pp), (NC)))

void erts_init_utils(void);
void erts_init_utils_mem(void);

erts_dsprintf_buf_t *erts_create_tmp_dsbuf(Uint);
void erts_destroy_tmp_dsbuf(erts_dsprintf_buf_t *);

int eq(Eterm, Eterm);
#define EQ(x,y) (((x) == (y)) || (is_not_both_immed((x),(y)) && eq((x),(y))))

Sint cmp(Eterm, Eterm);
#define cmp_lt(a,b)	(cmp((a),(b)) < 0)
#define cmp_le(a,b)	(cmp((a),(b)) <= 0)
#define cmp_eq(a,b)	(cmp((a),(b)) == 0)
#define cmp_ne(a,b)	(cmp((a),(b)) != 0)
#define cmp_ge(a,b)	(cmp((a),(b)) >= 0)
#define cmp_gt(a,b)	(cmp((a),(b)) > 0)

#define CMP_LT(a,b)	((a) != (b) && cmp_lt((a),(b)))
#define CMP_GE(a,b)	((a) == (b) || cmp_ge((a),(b)))
#define CMP_EQ(a,b)	((a) == (b) || cmp_eq((a),(b)))
#define CMP_NE(a,b)	((a) != (b) && cmp_ne((a),(b)))

int term_to_Uint(Eterm term, Uint *up);

#ifdef HAVE_ERTS_NOW_CPU
extern int erts_cpu_timestamp;
#endif
/* erl_bif_chksum.c */
void erts_init_bif_chksum(void);
/* erl_bif_re.c */
void erts_init_bif_re(void);
Sint erts_re_set_loop_limit(Sint limit);
/* erl_unicode.c */
void erts_init_unicode(void);
Sint erts_unicode_set_loop_limit(Sint limit);
/* erl_trace.c */
void erts_init_trace(void);
void erts_trace_check_exiting(Eterm exiting);
Eterm erts_set_system_seq_tracer(Process *c_p,
				 ErtsProcLocks c_p_locks,
				 Eterm new);
Eterm erts_get_system_seq_tracer(void);
void erts_change_default_tracing(int setflags, Uint *flagsp, Eterm *tracerp);
void erts_get_default_tracing(Uint *flagsp, Eterm *tracerp);
void erts_set_system_monitor(Eterm monitor);
Eterm erts_get_system_monitor(void);

#ifdef ERTS_SMP
void erts_check_my_tracer_proc(Process *);
void erts_block_sys_msg_dispatcher(void);
void erts_release_sys_msg_dispatcher(void);
void erts_foreach_sys_msg_in_q(void (*func)(Eterm,
					    Eterm,
					    Eterm,
					    ErlHeapFragment *));
void erts_queue_error_logger_message(Eterm, Eterm, ErlHeapFragment *);
#endif

void erts_send_sys_msg_proc(Eterm, Eterm, Eterm, ErlHeapFragment *);
void trace_send(Process*, Eterm, Eterm);
void trace_receive(Process*, Eterm);
Uint32 erts_call_trace(Process *p, Eterm mfa[], Binary *match_spec, Eterm* args,
		       int local, Eterm *tracer_pid);
void erts_trace_return(Process* p, Eterm* fi, Eterm retval, Eterm *tracer_pid);
void erts_trace_exception(Process* p, Eterm mfa[], Eterm class, Eterm value, 
			  Eterm *tracer);
void erts_trace_return_to(Process *p, Uint *pc);
void trace_sched(Process*, Eterm);
void trace_proc(Process*, Process*, Eterm, Eterm);
void trace_proc_spawn(Process*, Eterm pid, Eterm mod, Eterm func, Eterm args);
void save_calls(Process *p, Export *);
void trace_gc(Process *p, Eterm what);
/* port tracing */
void trace_virtual_sched(Process*, Eterm);
void trace_sched_ports(Port *pp, Eterm);
void trace_sched_ports_where(Port *pp, Eterm, Eterm);
void trace_port(Port *, Eterm what, Eterm data);
void trace_port_open(Port *, Eterm calling_pid, Eterm drv_name);

/* system_profile */
void erts_set_system_profile(Eterm profile);
Eterm erts_get_system_profile(void);
void profile_scheduler(Eterm scheduler_id, Eterm);
void profile_scheduler_q(Eterm scheduler_id, Eterm state, Eterm no_schedulers, Uint Ms, Uint s, Uint us);
void profile_runnable_proc(Process* p, Eterm status);
void profile_runnable_port(Port* p, Eterm status);
void erts_system_profile_setup_active_schedulers(void);

/* system_monitor */
void monitor_long_gc(Process *p, Uint time);
void monitor_large_heap(Process *p);
void monitor_generic(Process *p, Eterm type, Eterm spec);
Uint erts_trace_flag2bit(Eterm flag);
int erts_trace_flags(Eterm List, 
		 Uint *pMask, Eterm *pTracer, int *pCpuTimestamp);
Eterm erts_bif_trace(int bif_index, Process* p, 
		     Eterm arg1, Eterm arg2, Eterm arg3, Uint *I);

#ifdef ERTS_SMP
void erts_send_pending_trace_msgs(ErtsSchedulerData *esdp);
#define ERTS_SMP_CHK_PEND_TRACE_MSGS(ESDP)				\
do {									\
    if ((ESDP)->pending_trace_msgs)					\
	erts_send_pending_trace_msgs((ESDP));				\
} while (0)
#else
#define ERTS_SMP_CHK_PEND_TRACE_MSGS(ESDP)
#endif

void bin_write(int, void*, byte*, int);
int intlist_to_buf(Eterm, char*, int); /* most callers pass plain char*'s */

struct Sint_buf {
#ifdef ARCH_64
    char s[22];
#else
    char s[12];
#endif
};	
char* Sint_to_buf(Sint, struct Sint_buf*);

Eterm buf_to_intlist(Eterm**, char*, int, Eterm); /* most callers pass plain char*'s */
int io_list_to_buf(Eterm, char*, int);
int io_list_to_buf2(Eterm, char*, int);
int io_list_len(Eterm);
int is_string(Eterm);
void erl_at_exit(FUNCTION(void,(*),(void*)), void*);
Eterm collect_memory(Process *);
void dump_memory_to_fd(int);
int dump_memory_data(const char *);

Eterm erts_mixed_plus(Process* p, Eterm arg1, Eterm arg2);
Eterm erts_mixed_minus(Process* p, Eterm arg1, Eterm arg2);
Eterm erts_mixed_times(Process* p, Eterm arg1, Eterm arg2);
Eterm erts_mixed_div(Process* p, Eterm arg1, Eterm arg2);
Eterm erts_int_div(Process* p, Eterm arg1, Eterm arg2);
Eterm erts_int_rem(Process* p, Eterm arg1, Eterm arg2);
Eterm erts_band(Process* p, Eterm arg1, Eterm arg2);
Eterm erts_bor(Process* p, Eterm arg1, Eterm arg2);
Eterm erts_bxor(Process* p, Eterm arg1, Eterm arg2);
Eterm erts_bnot(Process* p, Eterm arg);

Eterm erts_gc_mixed_plus(Process* p, Eterm* reg, Uint live);
Eterm erts_gc_mixed_minus(Process* p, Eterm* reg, Uint live);
Eterm erts_gc_mixed_times(Process* p, Eterm* reg, Uint live);
Eterm erts_gc_mixed_div(Process* p, Eterm* reg, Uint live);
Eterm erts_gc_int_div(Process* p, Eterm* reg, Uint live);
Eterm erts_gc_int_rem(Process* p, Eterm* reg, Uint live);
Eterm erts_gc_band(Process* p, Eterm* reg, Uint live);
Eterm erts_gc_bor(Process* p, Eterm* reg, Uint live);
Eterm erts_gc_bxor(Process* p, Eterm* reg, Uint live);
Eterm erts_gc_bnot(Process* p, Eterm* reg, Uint live);

Eterm erts_gc_length_1(Process* p, Eterm* reg, Uint live);
Eterm erts_gc_size_1(Process* p, Eterm* reg, Uint live);
Eterm erts_gc_bit_size_1(Process* p, Eterm* reg, Uint live);
Eterm erts_gc_byte_size_1(Process* p, Eterm* reg, Uint live);
Eterm erts_gc_abs_1(Process* p, Eterm* reg, Uint live);
Eterm erts_gc_float_1(Process* p, Eterm* reg, Uint live);
Eterm erts_gc_round_1(Process* p, Eterm* reg, Uint live);
Eterm erts_gc_trunc_1(Process* p, Eterm* reg, Uint live);

Uint erts_current_reductions(Process* current, Process *p);

int erts_print_system_version(int to, void *arg, Process *c_p);

/*
 * Interface to erl_init
 */
void erl_init(void);
void erts_first_process(Eterm modname, void* code, unsigned size, int argc, char** argv);

#define seq_trace_output(token, msg, type, receiver, process) \
seq_trace_output_generic((token), (msg), (type), (receiver), (process), NIL)
#define seq_trace_output_exit(token, msg, type, receiver, exitfrom) \
seq_trace_output_generic((token), (msg), (type), (receiver), NULL, (exitfrom))
void seq_trace_output_generic(Eterm token, Eterm msg, Uint type, 
			      Eterm receiver, Process *process, Eterm exitfrom);

int seq_trace_update_send(Process *process);

Eterm erts_seq_trace(Process *process, 
		     Eterm atom_type, Eterm atom_true_or_false, 
		     int build_result);

struct trace_pattern_flags {
    unsigned int breakpoint : 1; /* Set if any other is set */
    unsigned int local      : 1; /* Local call trace breakpoint */
    unsigned int meta       : 1; /* Metadata trace breakpoint */
    unsigned int call_count : 1; /* Fast call count breakpoint */
};
extern const struct trace_pattern_flags erts_trace_pattern_flags_off;
int erts_set_trace_pattern(Eterm* mfa, int specified, 
			   Binary* match_prog_set, Binary *meta_match_prog_set,
			   int on, struct trace_pattern_flags,
			   Eterm meta_tracer_pid);
void
erts_get_default_trace_pattern(int *trace_pattern_is_on,
			       Binary **match_spec,
			       Binary **meta_match_spec,
			       struct trace_pattern_flags *trace_pattern_flags,
			       Eterm *meta_tracer_pid);
void erts_bif_trace_init(void);

/*
** Call_trace uses this API for the parameter matching functions
*/

#define MatchSetRef(MPSP) 			\
do {						\
    if ((MPSP) != NULL) {			\
	erts_refc_inc(&(MPSP)->refc, 1);	\
    }						\
} while (0)

#define MatchSetUnref(MPSP)					\
do {								\
    if (((MPSP) != NULL) && erts_refc_dectest(&(MPSP)->refc, 0) <= 0) { \
	erts_bin_free(MPSP);					\
    }								\
} while(0)

#define MatchSetGetSource(MPSP) erts_match_set_get_source(MPSP)

extern Binary *erts_match_set_compile(Process *p, Eterm matchexpr);
Eterm erts_match_set_lint(Process *p, Eterm matchexpr); 
extern void erts_match_set_release_result(Process* p);
extern Eterm erts_match_set_run(Process *p, Binary *mpsp, 
				Eterm *args, int num_args,
				Uint32 *return_flags);
extern Eterm erts_match_set_get_source(Binary *mpsp);
extern void erts_match_prog_foreach_offheap(Binary *b,
					    void (*)(ErlOffHeap *, void *),
					    void *);

#define MATCH_SET_RETURN_TRACE 0x1 /* return trace requested */
#define MATCH_SET_RETURN_TO_TRACE 0x2 /* Misleading name, it is not actually
					 set by the match program, but by the
					 breakpoint functions */
#define MATCH_SET_EXCEPTION_TRACE 0x4 /* exception trace requested */
#define MATCH_SET_RX_TRACE (MATCH_SET_RETURN_TRACE|MATCH_SET_EXCEPTION_TRACE)
/*
 * Flag values when tracing bif
 */
#define BIF_TRACE_AS_LOCAL  0x1
#define BIF_TRACE_AS_GLOBAL 0x2
#define BIF_TRACE_AS_META   0x4

extern erts_driver_t vanilla_driver;
extern erts_driver_t spawn_driver;
extern erts_driver_t fd_driver;

/* Should maybe be placed in erl_message.h, but then we get an include mess. */

ERTS_GLB_INLINE Eterm *
erts_alloc_message_heap(Uint size,
			ErlHeapFragment **bpp,
			ErlOffHeap **ohpp,
			Process *receiver,
			ErtsProcLocks *receiver_locks);

#if ERTS_GLB_INLINE_INCL_FUNC_DEF

/*
 * NOTE: erts_alloc_message_heap() releases msg q and status
 *       lock on receiver without ensuring that other locks are
 *       held. User is responsible to ensure that the receiver
 *       pointer cannot become invalid until after message has
 *       been passed. This is normal done either by increasing
 *       reference count on process (preferred) or by holding
 *       main or link lock over the whole message passing
 *       operation.
 */

ERTS_GLB_INLINE Eterm *
erts_alloc_message_heap(Uint size,
			ErlHeapFragment **bpp,
			ErlOffHeap **ohpp,
			Process *receiver,
			ErtsProcLocks *receiver_locks)
{
    Eterm *hp;
#ifdef ERTS_SMP
    int locked_main = 0;
    ErtsProcLocks ulocks = *receiver_locks & ERTS_PROC_LOCKS_MSG_SEND;
#endif

    if (size > (Uint) INT_MAX)
	erl_exit(ERTS_ABORT_EXIT, "HUGE size (%bpu)\n", size);

    if (
#if defined(ERTS_SMP)
	*receiver_locks & ERTS_PROC_LOCK_MAIN
#else
	1
#endif
	) {
#ifdef ERTS_SMP
    try_allocate_on_heap:
#endif
	if (ERTS_PROC_IS_EXITING(receiver)
	    || HEAP_LIMIT(receiver) - HEAP_TOP(receiver) <= size) {
#ifdef ERTS_SMP
	    if (locked_main)
		ulocks |= ERTS_PROC_LOCK_MAIN;
#endif
	    goto allocate_in_mbuf;
	}
#ifdef ERTS_SMP
	if (ulocks) {
	    erts_smp_proc_unlock(receiver, ulocks);
	    *receiver_locks &= ~ulocks;
	}
#endif
	hp = HEAP_TOP(receiver);
	HEAP_TOP(receiver) = hp + size;
	*bpp = NULL;
	*ohpp = &MSO(receiver);
    }
#ifdef ERTS_SMP
    else if (erts_smp_proc_trylock(receiver, ERTS_PROC_LOCK_MAIN) == 0) {
	locked_main = 1;
	*receiver_locks |= ERTS_PROC_LOCK_MAIN;
	goto try_allocate_on_heap;
    }
#endif
    else {
	ErlHeapFragment *bp;
    allocate_in_mbuf:
#ifdef ERTS_SMP
	if (ulocks) {
	    *receiver_locks &= ~ulocks;
	    erts_smp_proc_unlock(receiver, ulocks);
	}
#endif
	bp = new_message_buffer(size);
	hp = bp->mem;
	*bpp = bp;
	*ohpp = &bp->off_heap;
    }

    return hp;
}

#endif /* #if ERTS_GLB_INLINE_INCL_FUNC_DEF */

#endif