+extern proc_t kernproc;
+
+extern int proc_is_classic(proc_t p);
+proc_t current_proc_EXTERNAL(void);
+
+extern int msleep(void *chan, lck_mtx_t *mtx, int pri, const char *wmesg, struct timespec * ts );
+extern void wakeup(void *chan);
+extern void wakeup_one(caddr_t chan);
+
+/* proc kpis */
+/* this routine returns the pid of the current process */
+extern int proc_selfpid(void);
+/* this routine returns the pid of the parent of the current process */
+extern int proc_selfppid(void);
+/* this routine returns the csflags of the current process */
+extern int proc_selfcsflags(void);
+/* this routine returns sends a signal signum to the process identified by the pid */
+extern void proc_signal(int pid, int signum);
+/* this routine checks whether any signal identified by the mask are pending in the process identified by the pid. The check is on all threads of the process. */
+extern int proc_issignal(int pid, sigset_t mask);
+/* this routine returns 1 if the pid1 is inferior of pid2 */
+extern int proc_isinferior(int pid1, int pid2);
+/* this routine copies the process's name of the executable to the passed in buffer. It
+ * is always null terminated. The size of the buffer is to be passed in as well. This
+ * routine is to be used typically for debugging
+ */
+void proc_name(int pid, char * buf, int size);
+/* This routine is simillar to proc_name except it returns for current process */
+void proc_selfname(char * buf, int size);
+
+/* find a process with a given pid. This comes with a reference which needs to be dropped by proc_rele */
+extern proc_t proc_find(int pid);
+/* returns a handle to current process which is referenced. The reference needs to be dropped with proc_rele */
+extern proc_t proc_self(void);
+/* releases the held reference on the process */
+extern int proc_rele(proc_t p);
+/* returns the pid of the given process */
+extern int proc_pid(proc_t);
+/* returns the pid of the parent of a given process */
+extern int proc_ppid(proc_t);
+/* returns 1 if the process is marked for no remote hangs */
+extern int proc_noremotehang(proc_t);
+/* returns 1 if the process is marked for force quota */
+extern int proc_forcequota(proc_t);
+/* returns 1 if the process is chrooted */
+extern int proc_chrooted(proc_t);
+
+/* this routine returns 1 if the process is running with 64bit address space, else 0 */
+extern int proc_is64bit(proc_t);
+/* is this process exiting? */
+extern int proc_exiting(proc_t);
+/* this routine returns error if the process is not one with super user privileges */
+int proc_suser(proc_t p);
+/* returns the cred assicaited with the process; temporary api */
+kauth_cred_t proc_ucred(proc_t p);
+
+extern int proc_tbe(proc_t);
+
+/*!
+ @function proc_selfpgrpid
+ @abstract Get the process group id for the current process, as with proc_pgrpid().
+ @return pgrpid of current process.
+ */
+pid_t proc_selfpgrpid(void);
+
+/*!
+ @function proc_pgrpid
+ @abstract Get the process group id for the passed-in process.
+ @param p Process whose pgrpid to grab.
+ @return pgrpid for "p".
+ */
+pid_t proc_pgrpid(proc_t p);
+
+#ifdef KERNEL_PRIVATE
+// mark a process as being allowed to call vfs_markdependency()
+void bsd_set_dependency_capable(task_t task);
+#ifdef __arm__
+static inline int IS_64BIT_PROCESS(__unused proc_t p) { return 0; }
+#else
+extern int IS_64BIT_PROCESS(proc_t);
+#endif /* __arm__ */
+
+extern int tsleep(void *chan, int pri, const char *wmesg, int timo);
+extern int msleep1(void *chan, lck_mtx_t *mtx, int pri, const char *wmesg, u_int64_t timo);
+
+task_t proc_task(proc_t);
+extern int proc_pidversion(proc_t);
+extern uint32_t proc_persona_id(proc_t);
+extern uint32_t proc_getuid(proc_t);
+extern uint32_t proc_getgid(proc_t);
+extern int proc_getcdhash(proc_t, unsigned char *);
+
+/*!
+ @function proc_pidbackgrounded
+ @abstract KPI to determine if a process is currently backgrounded.
+ @discussion The process may move into or out of background state at any time,
+ so be prepared for this value to be outdated immediately.
+ @param pid PID of the process to be queried.
+ @param state Pointer to a value which will be set to 1 if the process
+ is currently backgrounded, 0 otherwise.
+ @return ESRCH if pid cannot be found or has started exiting.
+
+ EINVAL if state is NULL.
+ */
+extern int proc_pidbackgrounded(pid_t pid, uint32_t* state);