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-rw-r--r--nerv/lib/matrix/matrix.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/nerv/lib/matrix/matrix.h b/nerv/lib/matrix/matrix.h
index 67a6e30..51ca736 100644
--- a/nerv/lib/matrix/matrix.h
+++ b/nerv/lib/matrix/matrix.h
@@ -13,6 +13,7 @@ typedef struct Matrix {
long *i;
} data; /* pointer to actual storage */
long *data_ref;
+ int refcount; /* prevent matrix struct double free */
} Matrix;
#define MATRIX_ROW_PTR(self, row) \