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CONC-184 : provide a function to cancel a current connection

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(without invalidating MYSQL struct, without sending KILL)
This apparently is useful for replication handling in the server
This commit is contained in:
Vladislav Vaintroub
2016-05-21 12:35:06 +00:00
parent 07877e61cf
commit 437b9cd1e4
6 changed files with 61 additions and 4 deletions
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18
libmariadb/mariadb_lib.c
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@@ -3804,6 +3804,24 @@ my_bool STDCALL mariadb_get_info(MYSQL *mysql, enum mariadb_value value, void *a
return mariadb_get_infov(mysql, value, arg);
}
/*
Immediately aborts connection, making all subsequent read/write operations fail.
Does not invalidate memory used for mysql structure, nor closes any communication
channels - mysql_close is still needed.
Useful to break long query, in situation sending KILL is not possible.
*/
int STDCALL mariadb_cancel(MYSQL *mysql)
{
if (!mysql || !mysql->net.pvio || !mysql->net.pvio->methods || !mysql->net.pvio->methods->shutdown)
{
return 1;
}
else
{
MARIADB_PVIO *pvio = mysql->net.pvio;
return pvio->methods->shutdown(pvio);
}
}
#undef STDCALL
/* API functions for usage in dynamic plugins */
struct st_mariadb_api MARIADB_API=