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authorBen Cheng <bccheng@google.com>2014-03-25 22:37:19 -0700
committerBen Cheng <bccheng@google.com>2014-03-25 22:37:19 -0700
commit1bc5aee63eb72b341f506ad058502cd0361f0d10 (patch)
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parent283a0bf58fcf333c58a2a92c3ebbc41fb9eb1fdb (diff)
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Initial checkin of GCC 4.9.0 from trunk (r208799).
Change-Id: I48a3c08bb98542aa215912a75f03c0890e497dba
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+/* Streamer hooks. Support for adding streamer-specific callbacks to
+ generic streaming routines.
+
+ Copyright (C) 2011-2014 Free Software Foundation, Inc.
+ Contributed by Diego Novillo <dnovillo@google.com>
+
+This file is part of GCC.
+
+GCC 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, or (at your option) any later
+version.
+
+GCC 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 GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
+
+#ifndef GCC_STREAMER_HOOKS_H
+#define GCC_STREAMER_HOOKS_H
+
+/* Forward declarations to avoid including unnecessary headers. */
+struct output_block;
+struct lto_input_block;
+struct data_in;
+
+/* Streamer hooks. These functions do additional processing as
+ needed by the module. There are two types of callbacks, those that
+ replace the default behavior and those that supplement it.
+
+ Hooks marked [REQ] are required to be set. Those marked [OPT] may
+ be NULL, if the streamer does not need to implement them. */
+struct streamer_hooks {
+ /* [REQ] Called by every tree streaming routine that needs to write
+ a tree node. The arguments are: output_block where to write the
+ node, the tree node to write and a boolean flag that should be true
+ if the caller wants to write a reference to the tree, instead of the
+ tree itself. The second boolean parameter specifies this for
+ the tree itself, the first for all siblings that are streamed.
+ The referencing mechanism is up to each streamer to implement. */
+ void (*write_tree) (struct output_block *, tree, bool, bool);
+
+ /* [REQ] Called by every tree streaming routine that needs to read
+ a tree node. It takes two arguments: an lto_input_block pointing
+ to the buffer where to read from and a data_in instance with tables
+ and descriptors needed by the unpickling routines. It returns the
+ tree instantiated from the stream. */
+ tree (*read_tree) (struct lto_input_block *, struct data_in *);
+
+ /* [REQ] Called by every streaming routine that needs to read a location. */
+ location_t (*input_location) (struct bitpack_d *, struct data_in *);
+
+ /* [REQ] Called by every streaming routine that needs to write a location. */
+ void (*output_location) (struct output_block *, struct bitpack_d *, location_t);
+};
+
+#define stream_write_tree(OB, EXPR, REF_P) \
+ streamer_hooks.write_tree (OB, EXPR, REF_P, REF_P)
+
+#define stream_write_tree_shallow_non_ref(OB, EXPR, REF_P) \
+ streamer_hooks.write_tree (OB, EXPR, REF_P, false)
+
+#define stream_read_tree(IB, DATA_IN) \
+ streamer_hooks.read_tree (IB, DATA_IN)
+
+#define stream_input_location(BP, DATA_IN) \
+ streamer_hooks.input_location (BP, DATA_IN)
+
+#define stream_output_location(OB, BP, LOC) \
+ streamer_hooks.output_location (OB, BP, LOC)
+
+/* Streamer hooks. */
+extern struct streamer_hooks streamer_hooks;
+
+/* In streamer-hooks.c. */
+void streamer_hooks_init (void);
+
+#endif /* GCC_STREAMER_HOOKS_H */