typedef struct s_smpi_subtype{
void (*serialize)(const void * input, void *output, size_t count, void* subtype);
void (*unserialize)(const void * input, void *output, size_t count, void* subtype);
typedef struct s_smpi_subtype{
void (*serialize)(const void * input, void *output, size_t count, void* subtype);
void (*unserialize)(const void * input, void *output, size_t count, void* subtype);