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netconn: add callback arg storage

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This reuses the member 'int socket' by making it a union containing
both int and void pointer.

See bug #56593.

Signed-off-by: Simon Goldschmidt <goldsimon@gmx.de>
Suggested-by: Wilfred <wilfrednilsen@hotmail.com>
This commit is contained in:
Simon Goldschmidt
2019-07-13 20:46:36 +02:00
parent f37925dad2
commit 5465fdfd69
3 changed files with 15 additions and 14 deletions
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11
src/include/lwip/api.h
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@@ -246,10 +246,10 @@ struct netconn {
all threads when closing while threads are waiting. */
int mbox_threads_waiting;
#endif
/** only used for socket layer */
#if LWIP_SOCKET
int socket;
#endif /* LWIP_SOCKET */
union {
int socket;
void *ptr;
} callback_arg;
#if LWIP_SO_SNDTIMEO
/** timeout to wait for sending data (which means enqueueing data for sending
in internal buffers) in milliseconds */
@@ -373,6 +373,9 @@ err_t netconn_err(struct netconn *conn);
#define netconn_clear_flags(conn, clr_flags) do { (conn)->flags = (u8_t)((conn)->flags & (u8_t)(~(clr_flags) & 0xff)); } while(0)
#define netconn_is_flag_set(conn, flag) (((conn)->flags & (flag)) != 0)
#define netconn_set_callback_arg(conn, arg) do { (conn)->callback_arg.ptr = (arg); } while(0)
#define netconn_get_callback_arg(conn) ((conn)->callback_arg.ptr)
/** Set the blocking status of netconn calls (@todo: write/send is missing) */
#define netconn_set_nonblocking(conn, val) do { if(val) { \
netconn_set_flags(conn, NETCONN_FLAG_NON_BLOCKING); \