| /* Common macros for target hook definitions. |
| Copyright (C) 2001-2017 Free Software Foundation, Inc. |
| |
| This program 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. |
| |
| This program 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; see the file COPYING3. If not see |
| <http://www.gnu.org/licenses/>. */ |
| |
| /* The following macros should be provided by the including file: |
| |
| DEFHOOK(NAME, DOC, TYPE, PARAMS, INIT): Define a function-valued hook. |
| DEFHOOKPOD(NAME, DOC, TYPE, INIT): Define a piece-of-data 'hook'. */ |
| |
| /* Defaults for optional macros: |
| DEFHOOKPODX(NAME, TYPE, INIT): Like DEFHOOKPOD, but share documentation |
| with the previous 'hook'. */ |
| #ifndef DEFHOOKPODX |
| #define DEFHOOKPODX(NAME, TYPE, INIT) DEFHOOKPOD (NAME, 0, TYPE, INIT) |
| #endif |
| |
| /* HOOKSTRUCT(FRAGMENT): Declarator fragments to encapsulate all the |
| members into a struct gcc_target, which in turn contains several |
| sub-structs. */ |
| #ifndef HOOKSTRUCT |
| #define HOOKSTRUCT(FRAGMENT) |
| #endif |
| /* HOOK_VECTOR: Start a struct declaration, which then gets its own initializer. |
| HOOK_VECTOR_END: Close a struct declaration, providing a member declarator |
| name for nested use. */ |
| #ifndef HOOK_VECTOR_1 |
| #define HOOK_VECTOR_1(NAME, FRAGMENT) HOOKSTRUCT (FRAGMENT) |
| #endif |
| #define HOOK_VECTOR(INIT_NAME, SNAME) HOOK_VECTOR_1 (INIT_NAME, struct SNAME {) |
| #define HOOK_VECTOR_END(DECL_NAME) HOOK_VECTOR_1(,} DECL_NAME ;) |
| |
| /* FIXME: For pre-existing hooks, we can't place the documentation in the |
| documentation field here till we get permission from the FSF to include |
| it in GPLed software - the target hook documentation is so far only |
| available under the GFDL. */ |
| |
| /* A hook should generally be documented by a string in the DOC parameter, |
| which should contain texinfo markup. If the documentation is only available |
| under the GPL, but not under the GFDL, put it in a comment above the hook |
| definition. If the function declaration is available both under GPL and |
| GFDL, but the documentation is only available under the GFDL, put the |
| documentaton in tm.texi.in, heading with @hook <hookname> and closing |
| the paragraph with @end deftypefn / deftypevr as appropriate, and marking |
| the next autogenerated hook with @hook <hookname>. |
| In both these cases, leave the DOC string empty, i.e. "". |
| Sometimes, for some historic reason the function declaration |
| has to be documented differently |
| than what it is. In that case, use DEFHOOK_UNDOC to suppress auto-generation |
| of documentation. DEFHOOK_UNDOC takes a DOC string which it ignores, so |
| you can put GPLed documentation string there if you have hopes that you |
| can clear the declaration & documentation for GFDL distribution later, |
| in which case you can then simply change the DEFHOOK_UNDOC to DEFHOOK |
| to turn on the autogeneration of the documentation. |
| |
| A documentation string of "*" means not to emit any documentation at all, |
| and is mainly used internally for DEFHOOK_UNDOC. It should generally not |
| be used otherwise, but it has its use for exceptional cases where automatic |
| documentation is not wanted, and the real documentation is elsewere, like |
| for TARGET_ASM_{,UN}ALIGNED_INT_OP, which are hooks only for implementation |
| purposes; they refer to structs, the components of which are documented as |
| separate hooks TARGET_ASM_{,UN}ALIGNED_[HSDT]I_OP. |
| A DOC string of 0 is for internal use of DEFHOOKPODX and special table |
| entries only. */ |
| |
| /* Empty macro arguments are undefined in C90, so use an empty macro |
| to close top-level hook structures. */ |
| #define C90_EMPTY_HACK |