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/* Copyright (c) 2011-2021, The Tor Project, Inc. */
/* See LICENSE for licensing information */
/**
* \file waitpid.h
* \brief Headers for waitpid.c
**/
#ifndef TOR_WAITPID_H
#define TOR_WAITPID_H
#ifndef _WIN32
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
/** A callback structure waiting for us to get a SIGCHLD informing us that a
* PID has been closed. Created by set_waitpid_callback. Cancelled or cleaned-
* up from clear_waitpid_callback(). Do not access outside of the main thread;
* do not access from inside a signal handler. */
typedef struct waitpid_callback_t waitpid_callback_t;
waitpid_callback_t *set_waitpid_callback(pid_t pid,
void (*fn)(int, void *), void *arg);
void clear_waitpid_callback(waitpid_callback_t *ent);
void notify_pending_waitpid_callbacks(void);
#endif /* !defined(_WIN32) */
#endif /* !defined(TOR_WAITPID_H) */
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