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7497475295
This adds two new functions:
void
cogl_poll_get_info (CoglContext *context,
CoglPollFD **poll_fds,
int *n_poll_fds,
gint64 *timeout);
void
cogl_poll_dispatch (CoglContext *context,
const CoglPollFD *poll_fds,
int n_poll_fds);
The application is expected to call the first function whenever it is
about to block to go idle, and the second function whenever it comes
out of idle. This gives Cogl winsys's the ability poll file
descriptors for events. For example when handing swap complete
notifications, it can report that it needs to block on a file
descriptor.
The two functions are backed by winsys virtual functions. There are
currently no implementations. The default handler for get_info just
reports no file descriptors and an infinite timeout.
Reviewed-by: Robert Bragg <robert@linux.intel.com>
78 lines
2.1 KiB
C
78 lines
2.1 KiB
C
/*
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* Cogl
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*
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* An object oriented GL/GLES Abstraction/Utility Layer
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*
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* Copyright (C) 2012 Intel Corporation.
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*
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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; either
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* version 2 of the License, or (at your option) any later version.
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*
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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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*
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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, see <http://www.gnu.org/licenses/>.
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*
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*
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* Authors:
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* Neil Roberts <neil@linux.intel.com>
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "cogl-poll.h"
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#include "cogl-winsys-private.h"
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#include "cogl-context-private.h"
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void
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cogl_poll_get_info (CoglContext *context,
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CoglPollFD **poll_fds,
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int *n_poll_fds,
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gint64 *timeout)
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{
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const CoglWinsysVtable *winsys;
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_COGL_RETURN_IF_FAIL (cogl_is_context (context));
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_COGL_RETURN_IF_FAIL (poll_fds != NULL);
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_COGL_RETURN_IF_FAIL (n_poll_fds != NULL);
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_COGL_RETURN_IF_FAIL (timeout != NULL);
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winsys = _cogl_context_get_winsys (context);
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if (winsys->poll_get_info)
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{
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winsys->poll_get_info (context,
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poll_fds,
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n_poll_fds,
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timeout);
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return;
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}
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/* By default we'll assume Cogl doesn't need to block on anything */
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*poll_fds = NULL;
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*n_poll_fds = 0;
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*timeout = -1; /* no timeout */
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}
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void
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cogl_poll_dispatch (CoglContext *context,
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const CoglPollFD *poll_fds,
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int n_poll_fds)
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{
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const CoglWinsysVtable *winsys;
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_COGL_RETURN_IF_FAIL (cogl_is_context (context));
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winsys = _cogl_context_get_winsys (context);
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if (winsys->poll_dispatch)
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winsys->poll_dispatch (context, poll_fds, n_poll_fds);
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}
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