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982b6e37e4
A new data type has been added : pipes. Some pre-allocated empty pipes are maintained in a pool for users such as splice which use them a lot for very short times. Pipes are allocated using get_pipe() and released using put_pipe(). Pipes which are released with pending data are immediately killed. The struct pipe is small (16 to 20 bytes) and may even be further reduced by unifying ->data and ->next. It would be nice to have a dedicated cleanup task which would watch for the pipes usage and destroy a few of them from time to time.
55 lines
1.6 KiB
C
55 lines
1.6 KiB
C
/*
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include/proto/pipe.h
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Pipe management
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Copyright (C) 2000-2009 Willy Tarreau - w@1wt.eu
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation, version 2.1
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exclusively.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef _PROTO_PIPE_H
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#define _PROTO_PIPE_H
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#include <common/config.h>
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#include <types/pipe.h>
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extern int pipes_used; /* # of pipes in use (2 fds each) */
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extern int pipes_free; /* # of pipes unused (2 fds each) */
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/* return a pre-allocated empty pipe. Try to allocate one if there isn't any
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* left. NULL is returned if a pipe could not be allocated.
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*/
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struct pipe *get_pipe();
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/* destroy a pipe, possibly because an error was encountered on it. Its FDs
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* will be closed and it will not be reinjected into the live pool.
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*/
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void kill_pipe(struct pipe *p);
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/* put back a unused pipe into the live pool. If it still has data in it, it is
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* closed and not reinjected into the live pool. The caller is not allowed to
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* use it once released.
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*/
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void put_pipe(struct pipe *p);
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#endif /* _PROTO_PIPE_H */
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/*
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* Local variables:
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* c-indent-level: 8
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* c-basic-offset: 8
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* End:
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*/
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