g13/runner.h

   1 /* runner.h - Run and watch the backend engines
   2  * Copyright (C) 2009 Free Software Foundation, Inc.
   3  *
   4  * This file is part of GnuPG.
   5  *
   6  * GnuPG is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * GnuPG is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #ifndef G13_RUNNER_H
  21 #define G13_RUNNER_H
  22
  23 /* The runner object.  */
  24 struct runner_s;
  25 typedef struct runner_s *runner_t;
  26
  27 /* Prototypes for the handler functions provided by the engine.  */
  28 typedef gpg_error_t (*engine_handler_fnc_t) (void *opaque,
  29                                              runner_t runner,
  30                                              const char *statusline);
  31 typedef void (*engine_handler_cleanup_fnc_t) (void *opaque);
  32
  33
  34 /* Return the number of active threads.  */
  35 unsigned int runner_get_threads (void);
  36
  37 /* Create a new runner object.  */
  38 gpg_error_t runner_new (runner_t *r_runner, const char *name);
  39
  40 /* Free a runner object.  */
  41 void runner_release (runner_t runner);
  42
  43 /* Return the identifier of RUNNER.  */
  44 unsigned int runner_get_rid (runner_t runner);
  45
  46 /* Find a runner by its rid.  */
  47 runner_t runner_find_by_rid (unsigned int rid);
  48
  49 /* Functions to set properties of the runner.  */
  50 void runner_set_fds (runner_t runner, int in_fd, int out_fd);
  51
  52 void runner_set_pid (runner_t runner, pid_t pid);
  53
  54 /* Register the handler functions with a runner.  */
  55 void runner_set_handler (runner_t runner,
  56                          engine_handler_fnc_t handler,
  57                          engine_handler_cleanup_fnc_t handler_cleanup,
  58                          void *handler_data);
  59
  60 /* Start the runner.  */
  61 gpg_error_t runner_spawn (runner_t runner);
  62
  63 /* Cancel a runner.  */
  64 void runner_cancel (runner_t runner);
  65
  66 /* Cancel all runner.  */
  67 void runner_cancel_all (void);
  68
  69 /* Send data back to the engine.  This function is used by the
  70    engine's handler.  */
  71 gpg_error_t runner_send_line (runner_t runner,
  72                               const void *data, size_t datalen);
  73
  74
  75
  76 #endif /*G13_RUNNER_H*/
  77