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#ifndef __SIGCHLD_H
#define __SIGCHLD_H
#include <pthread.h>
#include "list.h"
struct sigchld_handler_t
{
struct list_head entry;
pthread_mutex_t lock;
pid_t pid;
void (*handler)(struct sigchld_handler_t *, int status);
};
void sigchld_register_handler(struct sigchld_handler_t *);
int sigchld_unregister_handler(struct sigchld_handler_t *);
void sigchld_lock();
void sigchld_unlock();
#endif
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