MINOR: stream-interface: move the applet context to its own struct

In preparation of making the applet context dynamically allocatable,
we create a "struct appctx". Nothing else was changed, it's the same
struct as the one which was in the stream interface.

include/types/stream_interface.h

@@ -89,36 +89,8 @@ struct si_ops {
 	void (*shutw)(struct stream_interface *);   /* shut write function */
 };
 
-/* A stream interface has 3 parts :
- *  - the buffer side, which interfaces to the buffers.
- *  - the remote side, which describes the state and address of the other side.
- *  - the functions, which are used by the buffer side to communicate with the
- *    remote side from the buffer side.
- */
-
-/* Note that if an applet is registered, the update function will not be called
- * by the session handler, so it may be used to resync flags at the end of the
- * applet handler. See stream_int_update_embedded() for reference.
- */
-struct stream_interface {
-	/* struct members used by the "buffer" side */
-	unsigned int state;     /* SI_ST* */
-	unsigned int prev_state;/* SI_ST*, copy of previous state */
-	unsigned int flags;     /* SI_FL_* */
-	struct channel *ib, *ob; /* input and output buffers */
-	unsigned int exp;       /* wake up time for connect, queue, turn-around, ... */
-	void *owner;            /* generally a (struct task*) */
-	unsigned int err_type;  /* first error detected, one of SI_ET_* */
-
-	struct connection *conn; /* descriptor for a connection */
-	struct si_ops *ops;     /* general operations at the stream interface layer */
-
-	void (*release)(struct stream_interface *); /* handler to call after the last close() */
-
-	/* struct members below are the "remote" part, as seen from the buffer side */
-	int conn_retries;	/* number of connect retries left */
-	int send_proxy_ofs;	/* <0 = offset to (re)send from the end, >0 = send all */
-	struct {
+/* Context of a running applet. */
+struct appctx {
 	unsigned int st0;          /* CLI state for stats, session state for peers */
 	unsigned int st1;          /* prompt for stats, session error for peers */
 	unsigned int st2;          /* output state for stats, unused by peers  */
@@ -165,7 +137,38 @@ struct stream_interface {
 			void *ptr;              /* multi-purpose pointer for peers */
 		} peers;
 	} ctx;					/* used by stats I/O handlers to dump the stats */
-	} applet;
+};
+
+/* A stream interface has 3 parts :
+ *  - the buffer side, which interfaces to the buffers.
+ *  - the remote side, which describes the state and address of the other side.
+ *  - the functions, which are used by the buffer side to communicate with the
+ *    remote side from the buffer side.
+ */
+
+/* Note that if an applet is registered, the update function will not be called
+ * by the session handler, so it may be used to resync flags at the end of the
+ * applet handler. See stream_int_update_embedded() for reference.
+ */
+struct stream_interface {
+	/* struct members used by the "buffer" side */
+	unsigned int state;     /* SI_ST* */
+	unsigned int prev_state;/* SI_ST*, copy of previous state */
+	unsigned int flags;     /* SI_FL_* */
+	struct channel *ib, *ob; /* input and output buffers */
+	unsigned int exp;       /* wake up time for connect, queue, turn-around, ... */
+	void *owner;            /* generally a (struct task*) */
+	unsigned int err_type;  /* first error detected, one of SI_ET_* */
+
+	struct connection *conn; /* descriptor for a connection */
+	struct si_ops *ops;     /* general operations at the stream interface layer */
+
+	void (*release)(struct stream_interface *); /* handler to call after the last close() */
+
+	/* struct members below are the "remote" part, as seen from the buffer side */
+	int conn_retries;	/* number of connect retries left */
+	int send_proxy_ofs;	/* <0 = offset to (re)send from the end, >0 = send all */
+	struct appctx applet;   /* context of the running applet if any */
 };
 
 /* An applet designed to run in a stream interface */