src/lib/process/waitpid.h

   1 /* Copyright (c) 2011-2021, The Tor Project, Inc. */
   2 /* See LICENSE for licensing information */
   3
   4 /**
   5  * \file waitpid.h
   6  * \brief Headers for waitpid.c
   7  **/
   8
   9 #ifndef TOR_WAITPID_H
  10 #define TOR_WAITPID_H
  11
  12 #ifndef _WIN32
  13 #ifdef HAVE_SYS_TYPES_H
  14 #include <sys/types.h>
  15 #endif
  16
  17 /** A callback structure waiting for us to get a SIGCHLD informing us that a
  18  * PID has been closed. Created by set_waitpid_callback. Cancelled or cleaned-
  19  * up from clear_waitpid_callback().  Do not access outside of the main thread;
  20  * do not access from inside a signal handler. */
  21 typedef struct waitpid_callback_t waitpid_callback_t;
  22
  23 waitpid_callback_t *set_waitpid_callback(pid_t pid,
  24                                          void (*fn)(int, void *), void *arg);
  25 void clear_waitpid_callback(waitpid_callback_t *ent);
  26 void notify_pending_waitpid_callbacks(void);
  27 #endif /* !defined(_WIN32) */
  28
  29 #endif /* !defined(TOR_WAITPID_H) */