You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
46 lines
2.0 KiB
46 lines
2.0 KiB
#pragma once
|
|
|
|
#include "frame.h"
|
|
|
|
typedef void* (*sm_yield)(sm_state* state); //NOTE: This `void*` is a stand-in for this function returning itself.
|
|
|
|
template<typename T, typename U>
|
|
inline T* _sm_var(sm_state* state, U name, T init)
|
|
{
|
|
auto val = &state->current->user.data[name];
|
|
bool set = val->set;
|
|
val->set = true;
|
|
val->free = false;
|
|
return ( ! set ) ?
|
|
_sm_init<T>(val, init) :
|
|
_sm_get<T>(val);
|
|
}
|
|
template<uint64_t name, typename T>
|
|
inline T* _sm_var(sm_state* state, T init)
|
|
{
|
|
static_assert(name < _SM_STACK_SIZE, "Line pseudo-hashmap not yet implemented");
|
|
return _sm_var(state, name, init);
|
|
}
|
|
|
|
// Pop the current stack frame, and re-set the pointer to the previous one.
|
|
void _sm_pop_stack(sm_state* state);
|
|
|
|
sm_yield _sm_noop(sm_state*);
|
|
|
|
inline sm_yield sm_end() { return (sm_yield)nullptr; }
|
|
inline sm_yield sm_continue() { return (sm_yield)_sm_noop; }
|
|
|
|
/// --- For accessing generator-local variables stored in the `state` structure.
|
|
|
|
#define SM_VAR_EX(name, init) _sm_var(state, (name), (init)) // Same as `SM_VAR`, except the slot is explicitly named with a runtime integer value. Must be lower than `_SM_STACK_SIZE`. (TODO: Allow wrapping around this max value with a hashtable that adds new pages with the `next' pointer in the `_sm_user_page' struct.)
|
|
#define SM_VAR(init) _sm_var<__LINE__, decltype(init)>(state, (init)) // Return a pointer to a unique variable on the current state machine's stack. Initialising it with `init' if it doesn't already have a set value.
|
|
#define SM_SLOT(T) _sm_var<__LINE__, T>(state, {}) /// Allocate an uninitialised slot for type `T` on the current state machine's stack frame, returning a pointer to the value. If the value has already been allocated, return a pointer to that value saved in the current frame.
|
|
|
|
/// ---
|
|
|
|
#define SM_BEGIN switch(state->current->pc) { case 0:
|
|
#define SM_END } _sm_pop_stack(state); return sm_end()
|
|
|
|
#define SM_YIELD(v) do { state->current->pc = __LINE__; return (sm_yield)(v); case __LINE__:; } while(0)
|
|
|