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83 lines
2.0 KiB
C
83 lines
2.0 KiB
C
#ifndef PROCESS_H
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#define PROCESS_H
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#include <pthread.h>
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#include <stdatomic.h>
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#include "util/list.h"
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#include "emu/cpu.h"
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#include "kernel/fs.h"
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#include "kernel/signal.h"
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struct process {
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struct cpu_state cpu; // do not access this field except on the current process
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pthread_t thread;
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dword_t pid, ppid;
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dword_t uid, gid;
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dword_t euid, egid;
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addr_t vdso;
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addr_t start_brk;
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addr_t brk;
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struct fd *pwd;
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struct fd *root;
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struct fd *files[MAX_FD];
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mode_t_ umask;
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struct sigaction_ sigactions[NUM_SIGS];
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sigset_t_ blocked;
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sigset_t_ queued; // where blocked signals go when they're sent
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sigset_t_ pending;
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struct process *parent;
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struct list children;
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struct list siblings;
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dword_t sid, pgid;
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struct list session;
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struct list group;
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struct tty *tty;
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bool has_timer;
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timer_t timer;
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// the next two fields are protected by the lock on the parent process, not
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// the lock on the process. this is because waitpid locks the parent
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// process to wait for any of its children to exit.
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dword_t exit_code;
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bool zombie;
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pthread_cond_t child_exit;
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pthread_cond_t vfork_done;
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pthread_mutex_t lock;
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};
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// current will always give the process that is currently executing
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// if I have to stop using __thread, current will become a macro
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extern __thread struct process *current;
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// Creates a new process, returns NULL in case of failure
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struct process *process_create(void);
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// Removes the process from the process table and frees it.
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void process_destroy(struct process *proc);
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struct pid {
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dword_t id; // immutable, no lock needed
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struct process *proc;
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struct list session;
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struct list group;
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pthread_mutex_t lock;
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};
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struct pid *pid_get(dword_t pid);
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struct process *pid_get_proc(dword_t pid);
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// When a thread is created to run a new process, this function is used.
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extern void (*run_process_func)();
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// TODO document
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void start_thread(struct process *proc);
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#endif
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