Research V6 development

Work on file usr/sys/proc.h

Co-Authored-By: Dennis Ritchie <dmr@research.uucp>
Synthesized-from: v6

diff --git a/usr/sys/proc.h b/usr/sys/proc.h
new file mode 100644 (file)
index 0000000..34a1d3b
--- /dev/null
+++ b/usr/sys/proc.h
@@ -0,0 +1,42 @@
+/*
+ * One structure allocated per active
+ * process. It contains all data needed
+ * about the process while the
+ * process may be swapped out.
+ * Other per process data (user.h)
+ * is swapped with the process.
+ */
+struct proc
+{
+       char    p_stat;
+       char    p_flag;
+       char    p_pri;          /* priority, negative is high */
+       char    p_sig;          /* signal number sent to this process */
+       char    p_uid;          /* user id, used to direct tty signals */
+       char    p_time;         /* resident time for scheduling */
+       char    p_cpu;          /* cpu usage for scheduling */
+       char    p_nice;         /* nice for scheduling */
+       int     p_ttyp;         /* controlling tty */
+       int     p_pid;          /* unique process id */
+       int     p_ppid;         /* process id of parent */
+       int     p_addr;         /* address of swappable image */
+       int     p_size;         /* size of swappable image (*64 bytes) */
+       int     p_wchan;        /* event process is awaiting */
+       int     *p_textp;       /* pointer to text structure */
+} proc[NPROC];
+
+/* stat codes */
+#define        SSLEEP  1               /* sleeping on high priority */
+#define        SWAIT   2               /* sleeping on low priority */
+#define        SRUN    3               /* running */
+#define        SIDL    4               /* intermediate state in process creation */
+#define        SZOMB   5               /* intermediate state in process termination */
+#define        SSTOP   6               /* process being traced */
+
+/* flag codes */
+#define        SLOAD   01              /* in core */
+#define        SSYS    02              /* scheduling process */
+#define        SLOCK   04              /* process cannot be swapped */
+#define        SSWAP   010             /* process is being swapped out */
+#define        STRC    020             /* process is being traced */
+#define        SWTED   040             /* another tracing flag */