83 lines
3.3 KiB
C++
83 lines
3.3 KiB
C++
/* Streamer hooks. Support for adding streamer-specific callbacks to
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generic streaming routines.
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Copyright (C) 2011-2020 Free Software Foundation, Inc.
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Contributed by Diego Novillo <dnovillo@google.com>
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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#ifndef GCC_STREAMER_HOOKS_H
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#define GCC_STREAMER_HOOKS_H
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/* Forward declarations to avoid including unnecessary headers. */
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struct output_block;
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class lto_input_block;
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class data_in;
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/* Streamer hooks. These functions do additional processing as
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needed by the module. There are two types of callbacks, those that
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replace the default behavior and those that supplement it.
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Hooks marked [REQ] are required to be set. Those marked [OPT] may
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be NULL, if the streamer does not need to implement them. */
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struct streamer_hooks {
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/* [REQ] Called by every tree streaming routine that needs to write
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a tree node. The arguments are: output_block where to write the
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node, the tree node to write and a boolean flag that should be true
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if the caller wants to write a reference to the tree, instead of the
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tree itself. The second boolean parameter specifies this for
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the tree itself, the first for all siblings that are streamed.
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The referencing mechanism is up to each streamer to implement. */
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void (*write_tree) (struct output_block *, tree, bool, bool);
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/* [REQ] Called by every tree streaming routine that needs to read
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a tree node. It takes two arguments: an lto_input_block pointing
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to the buffer where to read from and a data_in instance with tables
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and descriptors needed by the unpickling routines. It returns the
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tree instantiated from the stream. */
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tree (*read_tree) (class lto_input_block *, class data_in *);
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/* [REQ] Called by every streaming routine that needs to read a location. */
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void (*input_location) (location_t *, struct bitpack_d *, class data_in *);
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/* [REQ] Called by every streaming routine that needs to write a location. */
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void (*output_location) (struct output_block *, struct bitpack_d *, location_t);
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};
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#define stream_write_tree(OB, EXPR, REF_P) \
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streamer_hooks.write_tree (OB, EXPR, REF_P, REF_P)
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#define stream_write_tree_shallow_non_ref(OB, EXPR, REF_P) \
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streamer_hooks.write_tree (OB, EXPR, REF_P, false)
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#define stream_read_tree(IB, DATA_IN) \
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streamer_hooks.read_tree (IB, DATA_IN)
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#define stream_input_location(LOCPTR, BP, DATA_IN) \
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streamer_hooks.input_location (LOCPTR, BP, DATA_IN)
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#define stream_output_location(OB, BP, LOC) \
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streamer_hooks.output_location (OB, BP, LOC)
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/* Streamer hooks. */
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extern struct streamer_hooks streamer_hooks;
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/* In streamer-hooks.c. */
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void streamer_hooks_init (void);
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#endif /* GCC_STREAMER_HOOKS_H */
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