/* Global constants used in RS.
 */
#ifndef RS_CONST_H
#define RS_CONST_H

#define DEBUG_DEFAULT      0
#define PRIV_DEBUG_DEFAULT 0

#ifndef DEBUG
#define DEBUG DEBUG_DEFAULT
#endif

#ifndef PRIV_DEBUG
#define PRIV_DEBUG PRIV_DEBUG_DEFAULT
#endif

/* Space reserved for program and arguments. */
#define MAX_COMMAND_LEN     512         /* maximum argument string length */
#define MAX_SCRIPT_LEN      256         /* maximum restart script name length */
#define MAX_NR_ARGS          10         /* maximum number of arguments */

#define MAX_IPC_LIST        256         /* Max size of list for IPC target
                                         * process names
                                         */
#define MAX_DET_RESTART      10         /* maximum number of detached restarts. */

/* Flag values. */
#define RS_IN_USE       0x001    /* set when process slot is in use */
#define RS_EXITING      0x002    /* set when exit is expected */
#define RS_REFRESHING   0x004    /* set when refresh must be done */
#define RS_NOPINGREPLY  0x008    /* service failed to reply to a ping request */
#define RS_TERMINATED   0x010    /* service has terminated */
#define RS_LATEREPLY    0x020    /* no reply sent to RS_DOWN caller yet */
#define RS_INITIALIZING 0x040    /* set when init is in progress */
#define RS_UPDATING     0x080    /* set when update is in progress */
#define RS_PREPARE_DONE 0x100    /* set when updating and preparation is done */
#define RS_INIT_DONE    0x200    /* set when updating and init is done */
#define RS_INIT_PENDING 0x400    /* set when updating and init is pending */
#define RS_ACTIVE       0x800    /* set for the active instance of a service */
#define RS_DEAD         0x1000   /* set for an instance ready to be cleaned up */
#define RS_CLEANUP_DETACH 0x2000   /* detach at cleanup time */
#define RS_CLEANUP_SCRIPT 0x4000   /* run script at cleanup time */
#define RS_REINCARNATE    0x8000   /* after exit, restart with a new endpoint */

#define RS_SRV_IS_IDLE(S) (((S)->r_flags & RS_DEAD) || ((S)->r_flags & ~(RS_IN_USE|RS_ACTIVE|RS_CLEANUP_DETACH|RS_CLEANUP_SCRIPT)) == 0)

/* Constants determining RS period and binary exponential backoff. */
#define RS_INIT_T	(system_hz * 10)	/* allow T ticks for init */
#define RS_DELTA_T	(system_hz)		/* check every T ticks */
#define BACKOFF_BITS    (sizeof(long)*8)        /* bits in backoff field */
#define MAX_BACKOFF      30                     /* max backoff in RS_DELTA_T */

/* Magic process table addresses. */
#define BEG_RPROC_ADDR  (&rproc[0])
#define END_RPROC_ADDR  (&rproc[NR_SYS_PROCS])

/* Constants for live update. */
#define RS_DEFAULT_PREPARE_MAXTIME 2*RS_DELTA_T   /* default prepare max time */

/* Definitions for boot info tables. */
#define NULL_BOOT_NR    NR_BOOT_PROCS        /* marks a null boot entry */
#define DEFAULT_BOOT_NR NR_BOOT_PROCS        /* marks the default boot entry */

/* Define sys flags for the various process types. */
#define SRV_SF   (SF_CORE_SRV)                 /* system services */
#define SRVR_SF  (SRV_SF | SF_NEED_REPL)       /* services needing a replica */
#define DSRV_SF  (0)                           /* dynamic system services */
#define VM_SF    (SRVR_SF)     			/* vm */

/* Shorthands. */
#define SRV_OR_USR(rp, X, Y) (rp->r_priv.s_flags & SYS_PROC ? X : Y)

/* Reply flags. */
#define RS_DONTREPLY    0
#define RS_REPLY        1
#define RS_CANCEL       2

/* Swap flags. */
#define RS_DONTSWAP     0
#define RS_SWAP         1

/* Configuration constants */
#define RS_VM_DEFAULT_MAP_PREALLOC_LEN  (1024*1024*8)
#define RS_USE_PAGING                   0

/* Update macros. */
#define RUPDATE_INIT() memset(&rupdate, 0, sizeof(rupdate))
#define RUPDATE_CLEAR() RUPDATE_INIT()

/* Note that we have 'B' last in order to allow 'continue' statements */
#define RUPDATE_ITER(HEAD, RPUPD_PREV, RPUPD, B) do { \
        for(RPUPD = HEAD, RPUPD_PREV = NULL; RPUPD != NULL; \
          RPUPD_PREV = RPUPD, RPUPD = RPUPD->next_rpupd) { \
            B \
        } \
     } while(0)
#define RUPDATE_REV_ITER(TAIL, RPUPD_PREV, RPUPD, B) do { \
        RPUPD = TAIL; \
        for(RPUPD = TAIL; RPUPD != NULL; RPUPD = RPUPD->prev_rpupd) { \
            RPUPD_PREV = RPUPD->prev_rpupd; \
            B \
        } \
     } while(0)

#define RUPDATE_IS_UPDATING() (rupdate.flags & RS_UPDATING)
#define RUPDATE_IS_VM_UPDATING() ((rupdate.flags & RS_UPDATING) && rupdate.vm_rpupd)
#define RUPDATE_IS_VM_INIT_DONE() (rproc_ptr[_ENDPOINT_P(VM_PROC_NR)]->r_flags & RS_INIT_DONE)
#define RUPDATE_IS_RS_UPDATING() ((rupdate.flags & RS_UPDATING) && rupdate.rs_rpupd)
#define RUPDATE_IS_RS_INIT_DONE() (rproc_ptr[_ENDPOINT_P(RS_PROC_NR)]->r_flags & RS_INIT_DONE)
#define RUPDATE_IS_INITIALIZING() (rupdate.flags & RS_INITIALIZING)
#define RUPDATE_IS_UPD_SCHEDULED() (rupdate.num_rpupds > 0 && !RUPDATE_IS_UPDATING())
#define RUPDATE_IS_UPD_MULTI() (rupdate.num_rpupds > 1)
#define RUPDATE_IS_UPD_VM_MULTI() (rupdate.vm_rpupd && RUPDATE_IS_UPD_MULTI())
#define SRV_IS_UPDATING(RP) ((RP)->r_flags & RS_UPDATING)
#define SRV_IS_UPDATING_AND_INITIALIZING(RP) (((RP)->r_flags & (RS_UPDATING|RS_INITIALIZING)) == (RS_UPDATING|RS_INITIALIZING))
#define UPD_INIT_MAXTIME(RPUPD) ((RPUPD)->prepare_maxtime != RS_DEFAULT_PREPARE_MAXTIME ? (RPUPD)->prepare_maxtime : RS_INIT_T)
#define UPD_IS_PREPARING_ONLY(RPUPD) ((RPUPD)->lu_flags & SEF_LU_PREPARE_ONLY)
#define SRV_IS_PREPARING_ONLY(RP) ((RP)->r_upd.rp && UPD_IS_PREPARING_ONLY(&(RP)->r_upd))
#define UPD_IS_UPD_SCHEDULED(RPUPD) (RUPDATE_IS_UPD_SCHEDULED() && (RPUPD)->rp)
#define SRV_IS_UPD_SCHEDULED(RP) UPD_IS_UPD_SCHEDULED(&(RP)->r_upd)

#endif /* RS_CONST_H */