libvirt/src/internal.h

/*
 * internal.h: internal definitions just used by code from the library
 */

#ifndef __VIR_INTERNAL_H__
#define __VIR_INTERNAL_H__

#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <libxml/threads.h>

#include "hash.h"
#include "libvirt/libvirt.h"
#include "libvirt/virterror.h"
#include "driver.h"
#include <libintl.h>

#ifdef __cplusplus
extern "C" {
#endif

#define _(str) dgettext(GETTEXT_PACKAGE, (str))
#define N_(str) dgettext(GETTEXT_PACKAGE, (str))
#define gettext_noop(str) (str)

#ifdef __GNUC__
#ifdef HAVE_ANSIDECL_H
#include <ansidecl.h>
#endif

/* String equality tests, suggested by Jim Meyering. */
#define STREQ(a,b) (strcmp((a),(b)) == 0)
#define STRCASEEQ(a,b) (strcasecmp((a),(b)) == 0)
#define STRNEQ(a,b) (strcmp((a),(b)) != 0)
#define STRCASENEQ(a,b) (strcasecmp((a),(b)) != 0)

/**
 * ATTRIBUTE_UNUSED:
 *
 * Macro to flag conciously unused parameters to functions
 */
#ifndef ATTRIBUTE_UNUSED
#define ATTRIBUTE_UNUSED __attribute__((__unused__))
#endif

/**
 * ATTRIBUTE_FORMAT
 *
 * Macro used to check printf/scanf-like functions, if compiling
 * with gcc.
 */
#ifndef ATTRIBUTE_FORMAT
#define ATTRIBUTE_FORMAT(args...) __attribute__((__format__ (args)))
#endif

#else
#define ATTRIBUTE_UNUSED
#define ATTRIBUTE_FORMAT(...)
#endif

/**
 * TODO:
 *
 * macro to flag unimplemented blocks
 */
#define TODO 								\
    fprintf(stderr, "Unimplemented block at %s:%d\n",			\
            __FILE__, __LINE__);

/**
 * VIR_CONNECT_MAGIC:
 *
 * magic value used to protect the API when pointers to connection structures
 * are passed down by the uers.
 */
#define VIR_CONNECT_MAGIC 	0x4F23DEAD
#define VIR_IS_CONNECT(obj)	((obj) && (obj)->magic==VIR_CONNECT_MAGIC)


/**
 * VIR_DOMAIN_MAGIC:
 *
 * magic value used to protect the API when pointers to domain structures
 * are passed down by the uers.
 */
#define VIR_DOMAIN_MAGIC		0xDEAD4321
#define VIR_IS_DOMAIN(obj)		((obj) && (obj)->magic==VIR_DOMAIN_MAGIC)
#define VIR_IS_CONNECTED_DOMAIN(obj)	(VIR_IS_DOMAIN(obj) && VIR_IS_CONNECT((obj)->conn))

/**
 * VIR_NETWORK_MAGIC:
 *
 * magic value used to protect the API when pointers to network structures
 * are passed down by the uers.
 */
#define VIR_NETWORK_MAGIC		0xDEAD1234
#define VIR_IS_NETWORK(obj)		((obj) && (obj)->magic==VIR_NETWORK_MAGIC)
#define VIR_IS_CONNECTED_NETWORK(obj)	(VIR_IS_NETWORK(obj) && VIR_IS_CONNECT((obj)->conn))

/*
 * arbitrary limitations
 */
#define MAX_DRIVERS 10
#define MIN_XEN_GUEST_SIZE 64  /* 64 megabytes */

/*
 * Flags for Xen connections
 */
#define VIR_CONNECT_RO 1

/**
 * _virConnect:
 *
 * Internal structure associated to a connection
 */
struct _virConnect {
    unsigned int magic;     /* specific value to check */

    int uses;               /* reference count */

    /* The underlying hypervisor driver and network driver. */
    virDriverPtr      driver;
    virNetworkDriverPtr networkDriver;

    /* Private data pointer which can be used by driver and
     * network driver as they wish.
     * NB: 'private' is a reserved word in C++.
     */
    void *            privateData;
    void *            networkPrivateData;

    /* Per-connection error. */
    virError err;           /* the last error */
    virErrorFunc handler;   /* associated handlet */
    void *userData;         /* the user data */

    /* misc */
    xmlMutexPtr hashes_mux;/* a mutex to protect the domain and networks hash tables */
    virHashTablePtr domains;/* hash table for known domains */
    virHashTablePtr networks;/* hash table for known domains */
    int flags;              /* a set of connection flags */
};

/**
* _virDomain:
*
* Internal structure associated to a domain
*/
struct _virDomain {
    unsigned int magic;                  /* specific value to check */
    int uses;                            /* reference count */
    virConnectPtr conn;                  /* pointer back to the connection */
    char *name;                          /* the domain external name */
    int id;                              /* the domain ID */
    unsigned char uuid[VIR_UUID_BUFLEN]; /* the domain unique identifier */
};

/**
* _virNetwork:
*
* Internal structure associated to a domain
*/
struct _virNetwork {
    unsigned int magic;                  /* specific value to check */
    int uses;                            /* reference count */
    virConnectPtr conn;                  /* pointer back to the connection */
    char *name;                          /* the network external name */
    unsigned char uuid[VIR_UUID_BUFLEN]; /* the network unique identifier */
};

/*
* Internal routines
*/
char *virDomainGetVM(virDomainPtr domain);
char *virDomainGetVMInfo(virDomainPtr domain,
			 const char *vm, const char *name);

/************************************************************************
 *									*
 *		API for error handling					*
 *									*
 ************************************************************************/
void __virRaiseError(virConnectPtr conn,
		     virDomainPtr dom,
		     virNetworkPtr net,
		     int domain,
		     int code,
		     virErrorLevel level,
		     const char *str1,
		     const char *str2,
		     const char *str3,
		     int int1, int int2, const char *msg, ...)
  ATTRIBUTE_FORMAT(printf, 12, 13);
const char *__virErrorMsg(virErrorNumber error, const char *info);

/************************************************************************
 *									*
 *	API for domain/connections (de)allocations and lookups		*
 *									*
 ************************************************************************/

virConnectPtr	virGetConnect	(void);
int		virFreeConnect	(virConnectPtr conn);
virDomainPtr	__virGetDomain	(virConnectPtr conn,
				 const char *name,
				 const unsigned char *uuid);
int		virFreeDomain	(virConnectPtr conn,
				 virDomainPtr domain);
virNetworkPtr	__virGetNetwork	(virConnectPtr conn,
				 const char *name,
				 const unsigned char *uuid);
int		virFreeNetwork	(virConnectPtr conn,
				 virNetworkPtr domain);

#define virGetDomain(c,n,u) __virGetDomain((c),(n),(u))
#define virGetNetwork(c,n,u) __virGetNetwork((c),(n),(u))

int __virStateInitialize(void);
int __virStateCleanup(void);
int __virStateReload(void);
int __virStateActive(void);
#define virStateInitialize() __virStateInitialize()
#define virStateCleanup() __virStateCleanup()
#define virStateReload() __virStateReload()
#define virStateActive() __virStateActive()

#ifdef __cplusplus
}
#endif                          /* __cplusplus */
#endif                          /* __VIR_INTERNAL_H__ */

/*
 * vim: set tabstop=4:
 * vim: set shiftwidth=4:
 * vim: set expandtab:
 */
/*
 * Local variables:
 *  indent-tabs-mode: nil
 *  c-indent-level: 4
 *  c-basic-offset: 4
 *  tab-width: 4
 * End:
 */