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#ifndef H_PSM
#define H_PSM

/** \ingroup rpmtrans payload
 * \file lib/psm.h
 * Package state machine to handle a package from a transaction set.
 */

#define _RPMSQ_INTERNAL 
#include <rpmsq.h>
#include <rpmcallback.h>

extern int _psm_debug;

typedef struct rpmpsm_s * rpmpsm;

/**
 */
#define	PSM_VERBOSE	0x8000
#define	PSM_INTERNAL	0x4000
#define	PSM_SYSCALL	0x2000
#define	PSM_DEAD	0x1000
#define	_fv(_a)		((_a) | PSM_VERBOSE)
#define	_fi(_a)		((_a) | PSM_INTERNAL)
#define	_fs(_a)		((_a) | (PSM_INTERNAL | PSM_SYSCALL))
#define	_fd(_a)		((_a) | (PSM_INTERNAL | PSM_DEAD))
typedef enum pkgStage_e {
    PSM_UNKNOWN		=  0,
    PSM_INIT		=  1,
    PSM_PRE		=  2,
    PSM_PROCESS		=  3,
    PSM_POST		=  4,
    PSM_UNDO		=  5,
    PSM_FINI		=  6,

    PSM_PKGINSTALL	=  7,
    PSM_PKGERASE	=  8,
    PSM_PKGCOMMIT	= 10,
    PSM_PKGSAVE		= 12,

    PSM_CREATE		= 17,
    PSM_NOTIFY		= 22,
    PSM_DESTROY		= 23,
    PSM_COMMIT		= 25,

    PSM_CHROOT_IN	= 51,
    PSM_CHROOT_OUT	= 52,
    PSM_SCRIPT		= 53,
    PSM_TRIGGERS	= 54,
    PSM_IMMED_TRIGGERS	= 55,
    PSM_RPMIO_FLAGS	= 56,

    PSM_RPMDB_LOAD	= 97,
    PSM_RPMDB_ADD	= 98,
    PSM_RPMDB_REMOVE	= 99

} pkgStage;
#undef	_fv
#undef	_fi
#undef	_fs
#undef	_fd

/**
 */
struct rpmpsm_s {
    struct rpmsqElem sq;	/*!< Scriptlet/signal queue element. */

    rpmts ts;			/*!< transaction set */
    rpmte te;			/*!< current transaction element */
    rpmfi fi;			/*!< transaction element file info */
    FD_t cfd;			/*!< Payload file handle. */
    FD_t fd;			/*!< Repackage file handle. */
    Header oh;			/*!< Repackage header. */
    rpmdbMatchIterator mi;
    const char * stepName;
    const char * rpmio_flags;
    const char * failedFile;
    const char * pkgURL;	/*!< Repackage URL. */
    const char * pkgfn;		/*!< Repackage file name. */
    int scriptTag;		/*!< Scriptlet data tag. */
    int progTag;		/*!< Scriptlet interpreter tag. */
    int npkgs_installed;	/*!< No. of installed instances. */
    int scriptArg;		/*!< Scriptlet package arg. */
    int sense;			/*!< One of RPMSENSE_TRIGGER{IN,UN,POSTUN}. */
    int countCorrection;	/*!< 0 if installing, -1 if removing. */
    int chrootDone;		/*!< Was chroot(2) done by pkgStage? */
    int unorderedSuccessor;	/*!< Can the PSM be run asynchronously? */
    rpmCallbackType what;	/*!< Callback type. */
    unsigned long amount;	/*!< Callback amount. */
    unsigned long total;	/*!< Callback total. */
    rpmRC rc;
    pkgStage goal;
    pkgStage stage;		/*!< Current psm stage. */
    pkgStage nstage;		/*!< Next psm stage. */

    int nrefs;			/*!< Reference count. */
};

#ifdef __cplusplus
extern "C" {
#endif

/**
 * Unreference a package state machine instance.
 * @param psm		package state machine
 * @param msg
 * @return		NULL always
 */
rpmpsm rpmpsmUnlink (rpmpsm psm,
		const char * msg);

/**
 * Reference a package state machine instance.
 * @param psm		package state machine
 * @param msg
 * @return		new package state machine reference
 */
rpmpsm rpmpsmLink (rpmpsm psm, const char * msg);

/**
 * Destroy a package state machine.
 * @param psm		package state machine
 * @return		NULL always
 */
rpmpsm rpmpsmFree(rpmpsm psm);

/**
 * Create and load a package state machine.
 * @param ts		transaction set
 * @param te		transaction set element
 * @param fi		file info set
 * @return		new package state machine
 */
rpmpsm rpmpsmNew(rpmts ts, rpmte te, rpmfi fi);

/**
 * Package state machine driver.
 * @param psm		package state machine data
 * @param stage		next stage
 * @return		0 on success
 */
rpmRC rpmpsmStage(rpmpsm psm, pkgStage stage);
#define	rpmpsmUNSAFE	rpmpsmSTAGE

#ifdef __cplusplus
}
#endif

#endif	/* H_PSM */