gstreamer/gst/schedulers/cothreads_compat.h

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/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wtay@chello.be>
*
* cothreads_compat.h: Compatibility macros between cothreads packages
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/* use the old cothreads implementation in gst/cothreads.[ch] */
#if defined(_COTHREADS_OMEGA)
#include "../cothreads.h"
/* the name of this cothreads type */
#define COTHREADS_NAME "omega"
#define COTHREADS_NAME_CAPITAL "Omega"
/* unify the structs
*
* "cothread" and "cothread_context" need to be defined
*/
typedef cothread_state cothread;
/* define functions
* the macros are prepended with "do_"
*/
#define do_cothreads_init(x) /* NOP */
#define do_cothreads_stackquery(stack,size) cothread_stackquery(stack,size)
#define do_cothread_switch(to) cothread_switch(to)
#define do_cothread_create(new_cothread, context, func, argc, argv) \
G_STMT_START{ \
new_cothread = cothread_create (context); \
if (new_cothread) { \
cothread_setfunc (new_cothread, (func), (argc), (argv)); \
} \
}G_STMT_END
#define do_cothread_setfunc(cothread, context, func, argc, argv) \
cothread_setfunc ((cothread), (func), (argc), (argv))
#define do_cothread_destroy(cothread) cothread_free(cothread)
#define do_cothread_context_init() (cothread_context_init ())
#define do_cothread_context_destroy(context) cothread_context_free (context)
#define do_cothread_lock(cothread) cothread_lock(cothread)
#define do_cothread_unlock(cothread) cothread_unlock(cothread)
#define do_cothread_get_current() (cothread_current())
#define do_cothread_get_main(context) (cothread_current_main())
/* use the new cothreads implementation in libs/ext/cothreads */
#elif defined(_COTHREADS_WINGO)
#include <cothreads/cothreads.h>
#include <errno.h>
/* the name of this cothreads */
#define COTHREADS_NAME "wingo"
#define COTHREADS_NAME_CAPITAL "Wingo"
/* unify the structs
*
* "cothread" and "cothread_context" need to vbe defined
*/
typedef cothread cothread_context;
/* define functions
* the macros are prepended with "do_"
*/
#define do_cothreads_init(x) G_STMT_START{ \
if (!cothreads_initialized()) \
cothreads_init(0x0200000, 16); \
}G_STMT_END
#define do_cothreads_stackquery(stack,size) \
cothreads_alloc_thread_stack (stack, size)
static void do_cothread_switch(cothread *to)
{
cothread *from = cothread_self ();
if (from == (to)) {
GST_DEBUG (GST_CAT_COTHREAD_SWITCH,
"trying to switch to the same cothread (%p), not allowed",
(to));
g_warning ("trying to switch to the same cothread, not allowed");
} else {
GST_INFO (GST_CAT_COTHREAD_SWITCH,
"switching from cothread %p to cothread %p", from, (to));
cothread_switch (from, (to));
GST_INFO (GST_CAT_COTHREAD_SWITCH, "we're in cothread %p now", from);
}
}
#define do_cothread_create(new_cothread, context, func, argc, argv) \
G_STMT_START{ \
new_cothread = cothread_create ((func), 0, (void**) (argv), (context)); \
}G_STMT_END
#define do_cothread_setfunc(cothread, context, func, argc, argv) \
cothread_setfunc ((cothread), (func), (argc), (void **) (argv), (context))
#define do_cothread_destroy(cothread) cothread_destroy(cothread)
#define do_cothread_context_init() (cothread_create (NULL, 0, \
NULL, NULL))
#define do_cothread_context_destroy(context) cothread_destroy (context)
#define do_cothread_lock(cothread) /* FIXME */
#define do_cothread_unlock(cothread) /* FIXME */
#define do_cothread_get_current() (cothread_self())
#define do_cothread_get_main(context) (context)
/* bail out with an error if no cothreads package is defined */
#else
#error "No cothreads package defined"
#endif