/* * Copyright (c) 2013 * The President and Fellows of Harvard College. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE UNIVERSITY AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE UNIVERSITY OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef _PROC_H_ #define _PROC_H_ /* * Definition of a process. * * Note: curproc is defined by <current.h>. */ #include <spinlock.h> #include <thread.h> /* required for struct threadarray */ #include <limits.h> #include <synch.h> #include <types.h> #include <file_syscalls.h> struct addrspace; struct vnode; /* * Process structure. */ struct proc { char *p_name; /* Name of this process */ struct spinlock p_lock; /* Lock for this structure */ struct threadarray p_threads; /* Threads in this process */ /* VM */ struct addrspace *p_addrspace; /* virtual address space */ /* VFS */ struct vnode *p_cwd; /* current working directory */ /* add more material here as needed */ struct lock *fdtbl_lock; openfile *fdtbl[OPEN_MAX]; pid_t pid; }; /* This is the process structure for the kernel and for kernel-only threads. */ extern struct proc *kproc; /* Call once during system startup to allocate data structures. */ void proc_bootstrap(void); /* Create a fresh process for use by runprogram(). */ struct proc *proc_create_runprogram(const char *name); /* Destroy a process. */ void proc_destroy(struct proc *proc); /* Attach a thread to a process. Must not already have a process. */ int proc_addthread(struct proc *proc, struct thread *t); /* Detach a thread from its process. */ void proc_remthread(struct thread *t); /* Fetch the address space of the current process. */ struct addrspace *proc_getas(void); /* Change the address space of the current process, and return the old one. */ struct addrspace *proc_setas(struct addrspace *); /* Clone a process. */ struct proc * proc_clone(int *err); /* Close all open fds from a process. */ void proc_close_fds(struct proc *proc); #endif /* _PROC_H_ */