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-rw-r--r--include/util/lock.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/util/lock.h b/include/util/lock.h
index da18f81..27f23c5 100644
--- a/include/util/lock.h
+++ b/include/util/lock.h
@@ -5,6 +5,10 @@ struct Lock {
unsigned long pid;
} __attribute__((packed, aligned(4)));
+struct Semaphore {
+ unsigned long value;
+} __attribute__((packed, aligned(4)));
+
void lock(struct Lock* l);
void unlock(struct Lock* l);