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-rw-r--r--kernel/proc.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/kernel/proc.h b/kernel/proc.h
index c816ae2..a195b02 100644
--- a/kernel/proc.h
+++ b/kernel/proc.h
@@ -106,4 +106,9 @@ struct proc {
struct file *ofile[NOFILE]; // Open files
struct inode *cwd; // Current directory
char name[16]; // Process name (debugging)
+ int alarm_interval; // sigalarm syscall interval
+ uint64 alarm_handler; // sigalarm syscall handler
+ int alarm_tickspassed; // record how many ticks passed since last sigalarm handler call
+ int alarm_caninvoke; // prevent re-entrant calls to handler
+ struct trapframe *atpfm; // trapframe to resume after handling, must hold p->lock
};