Looking at the declarations of nxsig_timeout and wdentry_t:
static void nxsig_timeout(int argc, wdparm_t itcb)
typedef CODE void (*wdentry_t)(int argc, uint32_t arg1, ...);
A sidenote: You must be looking at a very old code base. The current
type for wdentry_t is:
133 typedef CODE void (*wdentry_t)(int argc, wdparm_t arg1, ...);
That was changed in 2015:
commit 3adcae8ffbf247f1038bbb3b8281ea811799031e
Author: Gregory Nutt <gn...@nuttx.org>
Date: Mon May 18 08:53:42 2015 -0600
Update the type passed to watchdog timer handlers. Using
uint32_t is a problem for 64-bit machines.
...
/* This is the form of the function that is called when the
* watchdog function expires. Up to four parameters may be passed.
*/
-typedef CODE void (*wdentry_t)(int argc, uint32_t arg1, ...);
+typedef CODE void (*wdentry_t)(int argc, wdparm_t arg1, ...);
But it is only the variable number of arguments vs. the fixed number of
arguments that concerns you.
Greg