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/* bottom-half.h - Bottom half interface.
Copyright (C) 2009 Free Software Foundation, Inc.
Written by Neal H. Walfield <neal@gnu.org>.
This file is part of the GNU Hurd.
The GNU Hurd is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 3 of the
License, or (at your option) any later version.
The GNU Hurd 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
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see
<http://www.gnu.org/licenses/>. */
#ifndef _VIENGOOS_BOTTOM_HALF_H
#define _VIENGOOS_BOTTOM_HALF_H 1
#include <hurd/stddef.h>
/* A bottom half. */
struct bottom_half
{
struct bottom_half *next;
void (*callback) (struct bottom_half *bh);
};
/* Queue a bottom half function for callback. This function is safe
to call from an interrupt handler. */
extern void bottom_half_register (struct bottom_half *bh);
/* Run any registered bottom half handlers. */
static inline void
bottom_half_run (void)
{
extern struct bottom_half *bottom_halves;
extern void bottom_half_run_hard (void);
if (unlikely (bottom_halves))
bottom_half_run_hard ();
}
#endif
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