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New version of mysql async connect: preparing for the new connect()

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This commit is contained in:
Massimiliano Pinto
2013-07-03 10:01:35 +02:00
parent 903b906044
commit 77c759ac33
2 changed files with 57 additions and 20 deletions
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40
modules/protocol/mysql_backend.c
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@ -33,6 +33,7 @@
* 27/06/2013 Vilho Raatikka Added skygw_log_write command as an example
* and necessary headers.
* 01/07/2013 Massimiliano Pinto Put Log Manager example code behind SS_DEBUG macros.
* 03/07/2013 Massimiliano Pinto Added delayq for incoming data before mysql connection
*/
static char *version_str = "V1.0.0";
@ -44,6 +45,8 @@ static int gw_write_backend_event(DCB *dcb);
static int gw_MySQLWrite_backend(DCB *dcb, GWBUF *queue);
static int gw_error_backend_event(DCB *dcb);
static int gw_backend_close(DCB *dcb);
static int backend_write_delayqueue(DCB *dcb);
static void backend_set_delayqueue(DCB *dcb, GWBUF *queue);
static GWPROTOCOL MyObject = {
gw_read_backend_event, /* Read - EPOLLIN handler */
@ -704,6 +707,31 @@ int gw_mysql_connect(char *host, int port, char *dbname, char *user, uint8_t *pa
}
/**
* This routine put into the delay queue the input queue
* The input is what backend DCB is receiving
* The routine is called from func.write() when mysql backend connection
* is not yet complete buu there are inout data from client
*
* @param dcb The current backend DCB
* @param queue Input data in the GWBUF struct
*/
static void backend_set_delayqueue(DCB *dcb, GWBUF *queue) {
spinlock_acquire(&dcb->delayqlock);
if (dcb->delayq) {
/* Append data */
dcb->delayq = gwbuf_append(dcb->delayq, queue);
} else {
if (queue != NULL) {
/* create the delay queue */
dcb->delayq = queue;
}
}
spinlock_release(&dcb->delayqlock);
}
/**
* This routine writes the delayq via dcb_write
* The dcb->delayq contains data received from the client before
@ -714,15 +742,15 @@ int gw_mysql_connect(char *host, int port, char *dbname, char *user, uint8_t *pa
*/
static int backend_write_delayqueue(DCB *dcb)
{
GWBUF *localq = NULL;
GWBUF *localq = NULL;
spinlock_acquire(&dcb->delayqlock);
spinlock_acquire(&dcb->delayqlock);
localq = dcb->delayq;
dcb->delayq = NULL;
localq = dcb->delayq;
dcb->delayq = NULL;
spinlock_release(&dcb->delayqlock);
spinlock_release(&dcb->delayqlock);
return dcb_write(dcb, localq);
return dcb_write(dcb, localq);
}
/////