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  • Committer: Evan Jones
  • Date: 2011-01-02 18:30:08 UTC
  • mto: (2055.1.2 build)
  • mto: This revision was merged to the branch mainline in revision 2056.
  • Revision ID: evanj@mit.edu-20110102183008-ytvoaig5zxdck3d5
libdrizzle: drizzle_state_read: only call recv() if data is available.

This uses the "read ready" flag that already exists to avoid excess system calls. Without this patch, in non-blocking mode after sending a command, libdrizzle immediately calls recv(), which almost always returns EAGAIN. This patch avoids that, instead returning IO_WAIT. This causes the caller to wait for data on the connection using poll() or epoll() before calling recv().

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plugin/uuid_function/uuid_function.cc
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 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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 */
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#include <config.h>
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#include <drizzled/charset_info.h>
 
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#include "config.h"
 
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#include <drizzled/plugin/function.h>
 
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#include <drizzled/item/func.h>
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#include <drizzled/function/str/strfunc.h>
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#include <drizzled/item/func.h>
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#include <drizzled/plugin/function.h>
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#include <uuid/uuid.h>
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#define UUID_LENGTH (8+1+4+1+4+1+4+1+12)
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  "UUID() function using libuuid",
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  drizzled::PLUGIN_LICENSE_GPL,
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  initialize, /* Plugin Init */
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  NULL,   /* depends */
 
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  NULL,   /* system variables */
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  NULL    /* config options */
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}
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DRIZZLE_DECLARE_PLUGIN_END;