Runtime: work around 1s delay added when using twisted reactor's callLater.
Since wxPython4, using wxReactor from non-main thread was producing
exceptions in wxWidget's C++ code. Then reactor.run() was called from
main thread, and runtime's worker was delegating calls to reactor
with callLater(0, callable).
While this worked perfectly with wxReactor, it did introduce an unexplained
1 second delay to each worker call when using nomal linux reactors
(i.e. without wxPython). As a workaround reactor runs in a thread when using
twisted without wxPython
#define __Unpack_case_t(TYPENAME) \
case TYPENAME##_ENUM : \
if(flags) *flags = ((__IEC_##TYPENAME##_t *)varp)->flags; \
if(value_p) *value_p = &((__IEC_##TYPENAME##_t *)varp)->value; \
if(size) *size = sizeof(TYPENAME); \
break;
#define __Unpack_case_p(TYPENAME) \
case TYPENAME##_O_ENUM : \
case TYPENAME##_P_ENUM : \
if(flags) *flags = ((__IEC_##TYPENAME##_p *)varp)->flags; \
if(value_p) *value_p = ((__IEC_##TYPENAME##_p *)varp)->value; \
if(size) *size = sizeof(TYPENAME); \
break;
#define __Is_a_string(dsc) (dsc->type == STRING_ENUM) ||\
(dsc->type == STRING_P_ENUM) ||\
(dsc->type == STRING_O_ENUM)
static int UnpackVar(__Unpack_desc_type *dsc, void **value_p, char *flags, size_t *size)
{
void *varp = dsc->ptr;
/* find data to copy*/
switch(dsc->type){
__ANY(__Unpack_case_t)
__ANY(__Unpack_case_p)
default:
return 0; /* should never happen */
}
return 1;
}