Read curproc from cpu structure, but be careful because after a schedule event

myproc() points to a different thread.

   myproc();
   sched();
   myproc();  // this proc maybe different than the one before sched

Thus, in a function that operates on one thread better to retrieve the
current process once at the start of the function.

1 files changed, 1 insertions, 0 deletions

diff --git a/defs.h b/defs.h
index 67ea9f6..5e049ae 100644
--- a/defs.h
+++ b/defs.h
@@ -108,6 +108,7 @@ void            exit(void);
 int             fork(void);
 int             growproc(int);
 int             kill(int);
+struct proc*    myproc();
 void            pinit(void);
 void            procdump(void);
 void            scheduler(void) __attribute__((noreturn));