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src/sparse-0.4.4/perl/t/include/migration/qemu-file.h  view on Meta::CPAN

typedef int (QEMUFileCloseFunc)(void *opaque);

/* Called to return the OS file descriptor associated to the QEMUFile.
 */
typedef int (QEMUFileGetFD)(void *opaque);

/*
 * This function writes an iovec to file.
 */
typedef ssize_t (QEMUFileWritevBufferFunc)(void *opaque, struct iovec *iov,
                                           int iovcnt, int64_t pos);

/*
 * This function provides hooks around different
 * stages of RAM migration.
 */
typedef int (QEMURamHookFunc)(QEMUFile *f, void *opaque, uint64_t flags);

/*
 * Constants used by ram_control_* hooks
 */
#define RAM_CONTROL_SETUP    0
#define RAM_CONTROL_ROUND    1
#define RAM_CONTROL_HOOK     2
#define RAM_CONTROL_FINISH   3

/*
 * This function allows override of where the RAM page
 * is saved (such as RDMA, for example.)
 */
typedef size_t (QEMURamSaveFunc)(QEMUFile *f, void *opaque,
                               ram_addr_t block_offset,
                               ram_addr_t offset,
                               size_t size,
                               int *bytes_sent);

typedef struct QEMUFileOps {
    QEMUFilePutBufferFunc *put_buffer;
    QEMUFileGetBufferFunc *get_buffer;
    QEMUFileCloseFunc *close;
    QEMUFileGetFD *get_fd;
    QEMUFileWritevBufferFunc *writev_buffer;
    QEMURamHookFunc *before_ram_iterate;
    QEMURamHookFunc *after_ram_iterate;
    QEMURamHookFunc *hook_ram_load;
    QEMURamSaveFunc *save_page;
} QEMUFileOps;

QEMUFile *qemu_fopen_ops(void *opaque, const QEMUFileOps *ops);
QEMUFile *qemu_fopen(const char *filename, const char *mode);
QEMUFile *qemu_fdopen(int fd, const char *mode);
QEMUFile *qemu_fopen_socket(int fd, const char *mode);
QEMUFile *qemu_popen_cmd(const char *command, const char *mode);
int qemu_get_fd(QEMUFile *f);
int qemu_fclose(QEMUFile *f);
int64_t qemu_ftell(QEMUFile *f);
void qemu_put_buffer(QEMUFile *f, const uint8_t *buf, int size);
void qemu_put_byte(QEMUFile *f, int v);
/*
 * put_buffer without copying the buffer.
 * The buffer should be available till it is sent asynchronously.
 */
void qemu_put_buffer_async(QEMUFile *f, const uint8_t *buf, int size);
bool qemu_file_mode_is_not_valid(const char *mode);

static inline void qemu_put_ubyte(QEMUFile *f, unsigned int v)
{
    qemu_put_byte(f, (int)v);
}

#define qemu_put_sbyte qemu_put_byte

void qemu_put_be16(QEMUFile *f, unsigned int v);
void qemu_put_be32(QEMUFile *f, unsigned int v);
void qemu_put_be64(QEMUFile *f, uint64_t v);
int qemu_get_buffer(QEMUFile *f, uint8_t *buf, int size);
int qemu_get_byte(QEMUFile *f);
void qemu_update_position(QEMUFile *f, size_t size);

static inline unsigned int qemu_get_ubyte(QEMUFile *f)
{
    return (unsigned int)qemu_get_byte(f);
}

#define qemu_get_sbyte qemu_get_byte

unsigned int qemu_get_be16(QEMUFile *f);
unsigned int qemu_get_be32(QEMUFile *f);
uint64_t qemu_get_be64(QEMUFile *f);

int qemu_file_rate_limit(QEMUFile *f);
void qemu_file_reset_rate_limit(QEMUFile *f);
void qemu_file_set_rate_limit(QEMUFile *f, int64_t new_rate);
int64_t qemu_file_get_rate_limit(QEMUFile *f);
int qemu_file_get_error(QEMUFile *f);
void qemu_fflush(QEMUFile *f);

static inline void qemu_put_be64s(QEMUFile *f, const uint64_t *pv)
{
    qemu_put_be64(f, *pv);
}

static inline void qemu_put_be32s(QEMUFile *f, const uint32_t *pv)
{
    qemu_put_be32(f, *pv);
}

static inline void qemu_put_be16s(QEMUFile *f, const uint16_t *pv)
{
    qemu_put_be16(f, *pv);
}

static inline void qemu_put_8s(QEMUFile *f, const uint8_t *pv)
{
    qemu_put_byte(f, *pv);
}

static inline void qemu_get_be64s(QEMUFile *f, uint64_t *pv)
{
    *pv = qemu_get_be64(f);
}