mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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259c8c394c
Original commit message from CVS:
some compile fixes, api changes, and i added the ability to create new chunks on the
stack, which can extend the main thread's stack up to 8M under linuxthreads. thanks
to billh for the {set,get}rlimit tip.
on the other hand, there's a nasty bug in cothreads when they are run without gthreads
that i'm still tracking down. that's the last bug though, at this point.
the commit is to syn the repository with my working copy before moving cothreads to a
separate module.
84 lines
3.3 KiB
C
84 lines
3.3 KiB
C
/* Pthread-friendly coroutines with pth
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* Copyright (C) 2002 Andy Wingo <wingo@pobox.com>
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*
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* cothread.h: public API
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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 Library 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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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __COTHREAD_H__
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#define __COTHREAD_H__
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#include <glib.h>
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#include <pth_p.h>
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#ifndef CURRENT_STACK_FRAME
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#define CURRENT_STACK_FRAME ({ char __csf; &__csf; })
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#endif /* CURRENT_STACK_FRAME */
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typedef pth_mctx_t cothread;
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typedef enum _cothreads_alloc_method cothreads_alloc_method;
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typedef struct _cothreads_config cothreads_config;
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enum _cothreads_alloc_method
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{
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COTHREADS_ALLOC_METHOD_MALLOC, /* cothread stacks on the heap, one block per chunk */
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COTHREADS_ALLOC_METHOD_GTHREAD_STACK, /* cothread stacks within the current gthread's stack */
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COTHREADS_ALLOC_METHOD_LINUXTHREADS, /* a hack that allows for linuxthreads compatibility */
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};
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struct _cothreads_config {
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cothreads_alloc_method method; /* the method of allocating new cothread stacks */
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int chunk_size; /* size of contiguous chunk of memory for cothread stacks */
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int blocks_per_chunk; /* cothreads per chunk */
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gboolean alloc_cothread_0; /* if the first cothread needs to be allocated */
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};
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#define COTHREADS_CONFIG_HEAP_INITIALIZER { \
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COTHREADS_ALLOC_METHOD_MALLOC, /* each cothread on the heap */ \
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0x20000, /* stack size of 128 kB */ \
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1, /* we aren't chunked */ \
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FALSE /* nothing special for cothread 0 */ \
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}
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#define COTHREADS_CONFIG_GTHREAD_INITIALIZER { \
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COTHREADS_ALLOC_METHOD_GTHREAD_STACK, /* this is what the old cothreads code does */ \
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0x100000, /* only 1 MB due the the FreeBSD defaults */ \
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8, /* for a stack size of 128 KB */ \
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TRUE /* set up the first chunk */ \
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}
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#define COTHREADS_CONFIG_LINUXTHREADS_INITIALIZER { \
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COTHREADS_ALLOC_METHOD_LINUXTHREADS, /* use the linuxthreads hack */ \
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0x200000, /* 2 MB */ \
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8, /* for a stack size of 256 KB */ \
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TRUE /* set up the first chunk */ \
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}
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gboolean cothreads_initialized (void);
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void cothreads_init (cothreads_config *config);
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cothread* cothread_create (void (*func)(int, void**), int argc, void **argv);
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void cothread_destroy (cothread *thread);
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/* 'old' and 'new' are of type (cothread*) */
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#define cothread_switch(old,new) pth_mctx_switch(old,new)
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#define cothread_yield(new) pth_mctx_restore(new);
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#endif /* __COTHREAD_H__ */
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