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135 lines
3.4 KiB
C
135 lines
3.4 KiB
C
/* Continuations for GDB, the GNU debugger.
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Copyright (C) 1986-2020 Free Software Foundation, Inc.
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This file is part of GDB.
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This program 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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This program 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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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "gdbthread.h"
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#include "inferior.h"
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#include "continuations.h"
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struct continuation
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{
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struct continuation *next;
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continuation_ftype *function;
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continuation_free_arg_ftype *free_arg;
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void *arg;
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};
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/* Add a new continuation to the continuation chain. Args are
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FUNCTION to run the continuation up with, and ARG to pass to
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it. */
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static void
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make_continuation (struct continuation **pmy_chain,
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continuation_ftype *function,
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void *arg, void (*free_arg) (void *))
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{
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struct continuation *newobj = XNEW (struct continuation);
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newobj->next = *pmy_chain;
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newobj->function = function;
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newobj->free_arg = free_arg;
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newobj->arg = arg;
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*pmy_chain = newobj;
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}
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static void
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do_my_continuations_1 (struct continuation **pmy_chain, int err)
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{
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struct continuation *ptr;
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while ((ptr = *pmy_chain) != NULL)
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{
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*pmy_chain = ptr->next; /* Do this first in case of recursion. */
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(*ptr->function) (ptr->arg, err);
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if (ptr->free_arg)
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(*ptr->free_arg) (ptr->arg);
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xfree (ptr);
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}
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}
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static void
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do_my_continuations (struct continuation **list, int err)
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{
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struct continuation *continuations;
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if (*list == NULL)
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return;
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/* Copy the list header into another pointer, and set the global
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list header to null, so that the global list can change as a side
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effect of invoking the continuations and the processing of the
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preexisting continuations will not be affected. */
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continuations = *list;
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*list = NULL;
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/* Work now on the list we have set aside. */
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do_my_continuations_1 (&continuations, err);
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}
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static void
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discard_my_continuations_1 (struct continuation **pmy_chain)
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{
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struct continuation *ptr;
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while ((ptr = *pmy_chain) != NULL)
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{
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*pmy_chain = ptr->next;
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if (ptr->free_arg)
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(*ptr->free_arg) (ptr->arg);
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xfree (ptr);
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}
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}
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static void
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discard_my_continuations (struct continuation **list)
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{
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discard_my_continuations_1 (list);
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*list = NULL;
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}
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/* Add a continuation to the continuation list of INFERIOR. The new
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continuation will be added at the front. */
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void
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add_inferior_continuation (continuation_ftype *hook, void *args,
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continuation_free_arg_ftype *free_arg)
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{
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struct inferior *inf = current_inferior ();
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make_continuation (&inf->continuations, hook, args, free_arg);
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}
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/* Do all continuations of the current inferior. */
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void
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do_all_inferior_continuations (int err)
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{
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struct inferior *inf = current_inferior ();
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do_my_continuations (&inf->continuations, err);
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}
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/* Get rid of all the inferior-wide continuations of INF. */
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void
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discard_all_inferior_continuations (struct inferior *inf)
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{
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discard_my_continuations (&inf->continuations);
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}
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