/*
* gtm_get_transactioninfo_size
* Get a serialized size of GTM_TransactionInfo structure
*
* Original gti_gid serialization was just "null-terminated string".
* This should be prefixed with the length of the string.
*/
size_t
gtm_get_transactioninfo_size(GTM_TransactionInfo *data)
{
size_t len = 0;
if (data == NULL)
return len;
len += sizeof(GTM_TransactionHandle); /* gti_handle */
len += sizeof(uint32); /* gti_client_id */
len += sizeof(bool); /* gti_in_use */
len += sizeof(GlobalTransactionId); /* gti_gxid */
len += sizeof(GTM_TransactionStates); /* gti_state */
len += sizeof(GlobalTransactionId); /* gti_xmin */
len += sizeof(GTM_IsolationLevel); /* gti_isolevel */
len += sizeof(bool); /* gti_readonly */
len += sizeof(GTMProxy_ConnID); /* gti_proxy_client_id */
len += sizeof(uint32); /* gti_nodestring length */
if (data->nodestring != NULL)
len += strlen(data->nodestring);
len += sizeof(uint32);
if (data->gti_gid != NULL)
len += strlen(data->gti_gid); /* gti_gid */
len += gtm_get_snapshotdata_size(&(data->gti_current_snapshot));
/* gti_current_snapshot */
len += sizeof(bool); /* gti_snapshot_set */
/* NOTE: nothing to be done for gti_lock */
len += sizeof(bool); /* gti_vacuum */
return len;
}
/*
* gtm_serialize_snapshotdata
* Serialize a GTM_SnapshotData structure
*/
size_t
gtm_serialize_snapshotdata(GTM_SnapshotData *data, char *buf, size_t buflen)
{
int len = 0;
memset(buf, 0, buflen);
/* size check */
if (gtm_get_snapshotdata_size(data) > buflen)
return 0;
/* GTM_SnapshotData.sn_xmin */
memcpy(buf + len, &(data->sn_xmin), sizeof(GlobalTransactionId));
len += sizeof(GlobalTransactionId);
/* GTM_SnapshotData.sn_xmax */
memcpy(buf + len, &(data->sn_xmax), sizeof(GlobalTransactionId));
len += sizeof(GlobalTransactionId);
/* GTM_SnapshotData.sn_recent_global_xmin */
memcpy(buf + len, &(data->sn_recent_global_xmin), sizeof(GlobalTransactionId));
len += sizeof(GlobalTransactionId);
/* GTM_SnapshotData.sn_xcnt */
memcpy(buf + len, &(data->sn_xcnt), sizeof(uint32));
len += sizeof(uint32);
/* GTM_SnapshotData.sn_xip */
#if 0
/*
* This block of code seems to be wrong. data->sn_xip is an array of GlobalTransacionIDs
* and the number of elements are indicated by sn_xcnt.
*/
memcpy(buf + len, &(data->sn_xip), sizeof(GlobalTransactionId));
len += sizeof(GlobalTransactionId);
#else
if(data->sn_xcnt > 0)
{
memcpy(buf + len, data->sn_xip, sizeof(GlobalTransactionId) * data->sn_xcnt);
len += sizeof(GlobalTransactionId) * data->sn_xcnt;
}
#endif
return len;
}
/* -----------------------------------------------------
* Serialize a GTM_TransactionInfo structure
* -----------------------------------------------------
*/
size_t
gtm_serialize_transactioninfo(GTM_TransactionInfo *data, char *buf, size_t buflen)
{
int len = 0;
char *buf2;
int i;
int namelen;
/* size check */
if (gtm_get_transactioninfo_size(data) > buflen)
return 0;
memset(buf, 0, buflen);
/* GTM_TransactionInfo.gti_handle */
memcpy(buf + len, &(data->gti_handle), sizeof(GTM_TransactionHandle));
len += sizeof(GTM_TransactionHandle);
/* GTM_TransactionInfo.gti_client_id */
memcpy(buf + len, &(data->gti_client_id), sizeof(uint32));
len += sizeof(uint32);
/* GTM_TransactionInfo.gti_in_use */
memcpy(buf + len, &(data->gti_in_use), sizeof(bool));
len += sizeof(bool);
/* GTM_TransactionInfo.gti_gxid */
memcpy(buf + len, &(data->gti_gxid), sizeof(GlobalTransactionId));
len += sizeof(GlobalTransactionId);
/* GTM_TransactionInfo.gti_state */
memcpy(buf + len, &(data->gti_state), sizeof(GTM_TransactionStates));
len += sizeof(GTM_TransactionStates);
/* GTM_TransactionInfo.gti_coordname */
if (data->gti_coordname != NULL)
{
namelen = (uint32)strlen(data->gti_coordname);
memcpy(buf + len, &namelen, sizeof(uint32));
len += sizeof(uint32);
memcpy(buf + len, data->gti_coordname, namelen);
len += namelen;
}
else
{
namelen = 0;
memcpy(buf + len, &namelen, sizeof(uint32));
len += sizeof(uint32);
}
/* GTM_TransactionInfo.gti_xmin */
memcpy(buf + len, &(data->gti_xmin), sizeof(GlobalTransactionId));
len += sizeof(GlobalTransactionId);
/* GTM_TransactionInfo.gti_isolevel */
memcpy(buf + len, &(data->gti_isolevel), sizeof(GTM_IsolationLevel));
len += sizeof(GTM_IsolationLevel);
/* GTM_TransactionInfo.gti_readonly */
memcpy(buf + len, &(data->gti_readonly), sizeof(bool));
len += sizeof(bool);
/* GTM_TransactionInfo.gti_backend_id */
memcpy(buf + len, &(data->gti_backend_id), sizeof(GTMProxy_ConnID));
len += sizeof(GTMProxy_ConnID);
/* GTM_TransactionInfo.nodestring */
if (data->nodestring != NULL)
{
uint32 gidlen;
gidlen = (uint32)strlen(data->nodestring);
memcpy(buf + len, &gidlen, sizeof(uint32));
len += sizeof(uint32);
memcpy(buf + len, data->nodestring, gidlen);
len += gidlen;
}
else
{
uint32 gidlen = 0;
memcpy(buf + len, &gidlen, sizeof(uint32));
len += sizeof(uint32);
}
/* GTM_TransactionInfo.gti_gid */
if (data->gti_gid != NULL)
{
uint32 gidlen;
gidlen = (uint32)strlen(data->gti_gid);
memcpy(buf + len, &gidlen, sizeof(uint32));
len += sizeof(uint32);
memcpy(buf + len, data->gti_gid, gidlen);
len += gidlen;
}
else
{
uint32 gidlen = 0;
memcpy(buf + len, &gidlen, sizeof(uint32));
len += sizeof(uint32);
}
/* GTM_TransactionInfo.gti_current_snapshot */
buf2 = malloc(gtm_get_snapshotdata_size(&(data->gti_current_snapshot)));
i = gtm_serialize_snapshotdata(&(data->gti_current_snapshot),
buf2,
gtm_get_snapshotdata_size(&(data->gti_current_snapshot)));
memcpy(buf + len, buf2, i);
free(buf2);
len += i;
/* GTM_TransactionInfo.gti_snapshot_set */
memcpy(buf + len, &(data->gti_snapshot_set), sizeof(bool));
len += sizeof(bool);
/* GTM_TransactionInfo.gti_lock would not be serialized. */
/* GTM_TransactionInfo.gti_vacuum */
memcpy(buf + len, &(data->gti_vacuum), sizeof(bool));
len += sizeof(bool);
return len;
}
