1 files changed, 8 insertions, 0 deletions
diff --git a/apl9.h b/apl9.h
index 0fafe80..19c21aa 100644
--- a/apl9.h
+++ b/apl9.h
@@ -2,6 +2,9 @@
 #define MAX_LINE_LENGTH 1024
 #define MAX_LINE_TOKENS 1024
 
+#define STACKSIZE (1024*1024) /* 1 MB */
+#define REQUIREDSTACK (16*1024) /* 16 KB */
+
 typedef enum
 {
 	ArrayTag,
@@ -53,6 +56,7 @@ typedef enum
 	EValue = 6,
 	EDomain = 11,
 	ETimeout = 12, /* not in dyalog */
+	EStack = 13, /* C stack overflow */
 	ENotImplemented = 100, /* not in dyalog */
 } errorCodes;
 
@@ -233,6 +237,7 @@ struct DfnFrame
 struct ThreadData
 {
 	int id;
+	int requiredstack;
 	DfnFrame *currentdfn;
 	Mail *mail;
 	Mail *lastmail;
@@ -350,6 +355,9 @@ void messagesend(Array *, int);
 Array *messagerecv(Function, int);
 Array *runningtasks(void);
 Array *taskproperty(vlong, vlong);
+int stackused(void);
+int hasstack(int);
+void checkstack(void);
 
 /* Monadic functions from function.c */
 Array *fnNegate(Array *);