1 /* Definitions used by event-top.c, for GDB, the GNU debugger. 2 3 Copyright (C) 1999-2021 Free Software Foundation, Inc. 4 5 Written by Elena Zannoni <ezannoni@cygnus.com> of Cygnus Solutions. 6 7 This file is part of GDB. 8 9 This program is free software; you can redistribute it and/or modify 10 it under the terms of the GNU General Public License as published by 11 the Free Software Foundation; either version 3 of the License, or 12 (at your option) any later version. 13 14 This program is distributed in the hope that it will be useful, 15 but WITHOUT ANY WARRANTY; without even the implied warranty of 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 GNU General Public License for more details. 18 19 You should have received a copy of the GNU General Public License 20 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 21 22 #ifndef EVENT_TOP_H 23 #define EVENT_TOP_H 24 25 #include <signal.h> 26 27 struct cmd_list_element; 28 29 /* Exported functions from event-top.c. 30 FIXME: these should really go into top.h. */ 31 32 extern void display_gdb_prompt (const char *new_prompt); 33 extern void gdb_setup_readline (int); 34 extern void gdb_disable_readline (void); 35 extern void async_init_signals (void); 36 extern void change_line_handler (int); 37 38 extern void command_line_handler (gdb::unique_xmalloc_ptr<char> &&rl); 39 extern void command_handler (const char *command); 40 41 #ifdef SIGTSTP 42 extern void handle_sigtstp (int sig); 43 #endif 44 45 extern void handle_sigint (int sig); 46 extern void handle_sigterm (int sig); 47 extern void async_request_quit (void *arg); 48 extern void stdin_event_handler (int error, void *client_data); 49 extern void async_disable_stdin (void); 50 extern void async_enable_stdin (void); 51 52 /* Exported variables from event-top.c. 53 FIXME: these should really go into top.h. */ 54 55 extern bool set_editing_cmd_var; 56 extern bool exec_done_display_p; 57 extern struct prompts the_prompts; 58 extern void (*after_char_processing_hook) (void); 59 extern int call_stdin_event_handler_again_p; 60 extern void gdb_readline_no_editing_callback (void *client_data); 61 62 /* Wrappers for rl_callback_handler_remove and 63 rl_callback_handler_install that keep track of whether the callback 64 handler is installed in readline. Do not call the readline 65 versions directly. */ 66 extern void gdb_rl_callback_handler_remove (void); 67 extern void gdb_rl_callback_handler_install (const char *prompt); 68 69 /* Reinstall the readline callback handler (with no prompt), if not 70 currently installed. */ 71 extern void gdb_rl_callback_handler_reinstall (void); 72 73 typedef void (*segv_handler_t) (int); 74 75 /* On construction, replaces the current thread's SIGSEGV handler with 76 the provided one. On destruction, restores the handler to the 77 original one. */ 78 class scoped_segv_handler_restore 79 { 80 public: 81 scoped_segv_handler_restore (segv_handler_t new_handler); 82 ~scoped_segv_handler_restore (); 83 84 private: 85 segv_handler_t m_old_handler; 86 }; 87 88 #endif 89