61 lines
1.9 KiB
C
61 lines
1.9 KiB
C
/* handler.h - header for grub handler */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2009 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef GRUB_HANDLER_HEADER
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#define GRUB_HANDLER_HEADER 1
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#include <grub/list.h>
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#include <grub/err.h>
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struct grub_handler
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{
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struct grub_handler *next;
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const char *name;
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grub_err_t (*init) (void);
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grub_err_t (*fini) (void);
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};
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typedef struct grub_handler *grub_handler_t;
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struct grub_handler_class
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{
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struct grub_handler_class *next;
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const char *name;
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grub_handler_t handler_list;
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grub_handler_t cur_handler;
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};
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typedef struct grub_handler_class *grub_handler_class_t;
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extern grub_handler_class_t EXPORT_VAR(grub_handler_class_list);
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void EXPORT_FUNC(grub_handler_register) (grub_handler_class_t class,
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grub_handler_t handler);
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void EXPORT_FUNC(grub_handler_unregister) (grub_handler_class_t class,
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grub_handler_t handler);
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grub_err_t EXPORT_FUNC(grub_handler_set_current) (grub_handler_class_t class,
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grub_handler_t handler);
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#define GRUB_AS_HANDLER(ptr) \
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((GRUB_FIELD_MATCH (ptr, grub_handler_t, next) && \
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GRUB_FIELD_MATCH (ptr, grub_handler_t, name) && \
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GRUB_FIELD_MATCH (ptr, grub_handler_t, init) && \
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GRUB_FIELD_MATCH (ptr, grub_handler_t, fini)) ? \
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(grub_handler_t) ptr : grub_bad_type_cast ())
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#endif /* ! GRUB_HANDLER_HEADER */
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