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MWL#192: non-blocking client API, after-review fixes.

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Main change is that non-blocking operation is now an option that must be
explicitly enabled with mysql_option(mysql, MYSQL_OPT_NONBLOCK, ...)
before any non-blocing operation can be used.

Also the CLIENT_REMEMBER_OPTIONS flag is now always enabled and thus
effectively ignored (it was not really useful anyway, and this simplifies
things when non-blocking mysql_real_connect() fails).
This commit is contained in:
unknown
2012-01-06 12:43:18 +01:00
parent a5b881594d
commit 17940b652d
23 changed files with 1727 additions and 765 deletions
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31
client/async_example.c
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@ -1,17 +1,15 @@
/*
Copyright 2011 Kristian Nielsen and Monty Program Ab.
Experiments with non-blocking libmysql.
This file is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
This is distributed in the hope that it will be useful,
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU General Public License
along with this. If not, see <http://www.gnu.org/licenses/>.
@ -133,6 +131,7 @@ doit(const char *host, const char *user, const char *password)
int status;
mysql_init(&mysql);
mysql_options(&mysql, MYSQL_OPT_NONBLOCK, 0);
mysql_options(&mysql, MYSQL_READ_DEFAULT_GROUP, "myapp");
/* Returns 0 when done, else flag for what to wait for when need to block. */
@ -177,8 +176,18 @@ doit(const char *host, const char *user, const char *password)
fatal(&mysql, "Got error while retrieving rows");
mysql_free_result(res);
/* I suppose this must be non-blocking too. */
mysql_close(&mysql);
/*
mysql_close() sends a COM_QUIT packet, and so in principle could block
waiting for the socket to accept the data.
In practise, for many applications it will probably be fine to use the
blocking mysql_close().
*/
status= mysql_close_start(&mysql);
while (status)
{
status= wait_for_mysql(&mysql, status);
status= mysql_close_cont(&mysql, status);
}
}
int