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#ifndef KIT_ASYNC_FUNCTION_H
#define KIT_ASYNC_FUNCTION_H
#include "types.h"
#include <string.h>
#ifdef __GNUC__
#define KIT_FALLTHROUGH __attribute__((fallthrough));
#else
#define KIT_FALLTHROUGH
#endif
#ifdef __cplusplus
extern "C" {
#endif
typedef struct {
i32 _;
} kit_af_void;
typedef void (*kit_af_state_machine)(void *self_void_);
#define KIT_AF_STATE_DATA \
struct { \
i32 _index; \
i32 _id; \
kit_af_state_machine _state_machine; \
}
typedef struct {
KIT_AF_STATE_DATA;
} kit_af_type_void;
#if defined(__GNUC__) || defined(__clang__)
# pragma GCC diagnostic push
# pragma GCC diagnostic ignored "-Wunused-function"
# pragma GCC diagnostic ignored "-Wunknown-pragmas"
#endif
#define KIT_AF_INTERNAL(coro_) (*((kit_af_type_void *) (coro_)))
#ifdef KIT_ENABLE_CUSTOM_ASYNC_FUNCTION_DISPATCH
// Application should implement this function if custom async
// function dispatch is enabled.
//
// See KIT_ENABLE_CUSTOM_ASYNC_FUNCTION_DISPATCH macro.
//
void kit_async_function_dispatch(void *promise);
#else
static void kit_async_function_dispatch(void *promise) {
// Dynamic dispatch by default.
//
KIT_AF_INTERNAL(promise)._state_machine(promise);
}
#endif
#if defined(__GNUC__) || defined(__clang__)
# pragma GCC diagnostic pop
#endif
#define KIT_AF_STATE(ret_type_, name_, ...) \
struct name_##_coro_state_ { \
KIT_AF_STATE_DATA; \
ret_type_ return_value; \
__VA_ARGS__ \
}
#define KIT_AF_DECL(name_) void name_(void *self_void_)
#define KIT_CORO_IMPL(name_) \
KIT_AF_DECL(name_) { \
struct name_##_coro_state_ *self = \
(struct name_##_coro_state_ *) self_void_; \
switch (self->_index) { \
case 0:;
#define KIT_AF_LINE_() __LINE__
#define KIT_CORO_END \
} \
self->_index = -1; \
}
#define KIT_CORO_DECL(ret_type_, name_, ...) \
KIT_AF_STATE(ret_type_, name_, __VA_ARGS__); \
KIT_AF_DECL(name_)
#define KIT_CORO(ret_type_, name_, ...) \
KIT_AF_STATE(ret_type_, name_, __VA_ARGS__); \
KIT_CORO_IMPL(name_)
#define KIT_CORO_DECL_VOID(name_, ...) \
KIT_CORO_DECL(kit_af_void, name_, __VA_ARGS__)
#define KIT_CORO_VOID(name_, ...) \
KIT_CORO(kit_af_void, name_, __VA_ARGS__)
#define KIT_STATIC_CORO(ret_type_, name_, ...) \
KIT_AF_STATE(ret_type_, name_, __VA_ARGS__); \
static KIT_CORO_IMPL(name_)
#define KIT_STATIC_CORO_VOID(name_, ...) \
KIT_STATIC_CORO(kit_af_void, name_, __VA_ARGS__)
#define KIT_AF_EXECUTE(promise_) \
kit_async_function_dispatch(&(promise_))
#define KIT_AF_NEXT(promise_) \
(kit_async_function_dispatch(&(promise_)), (promise_).return_value)
#define KIT_AF_YIELD(...) \
do { \
self->_index = KIT_AF_LINE_(); \
self->return_value = __VA_ARGS__; \
return; \
case KIT_AF_LINE_():; \
} while (0)
#define KIT_AF_YIELD_VOID \
do { \
self->_index = KIT_AF_LINE_(); \
return; \
case KIT_AF_LINE_():; \
} while (0)
#define KIT_AF_RETURN(...) \
do { \
self->_index = -1; \
self->return_value = __VA_ARGS__; \
return; \
} while (0)
#define KIT_AF_RETURN_VOID \
do { \
self->_index = -1; \
return; \
} while (0)
#define KIT_AF_AWAIT(promise_) \
do { \
KIT_FALLTHROUGH \
case KIT_AF_LINE_(): \
if ((promise_)._index != -1) { \
self->_index = KIT_AF_LINE_(); \
kit_async_function_dispatch(&(promise_)); \
} \
if ((promise_)._index != -1) \
return; \
} while (0)
#define KIT_AF_YIELD_AWAIT(promise_) \
do { \
KIT_FALLTHROUGH \
case KIT_AF_LINE_(): \
if ((promise_)._index != -1) { \
self->_index = KIT_AF_LINE_(); \
kit_async_function_dispatch(&(promise_)); \
self->return_value = (promise_).return_value; \
return; \
} \
} while (0)
#define KIT_AF_TYPE(coro_) struct coro_##_coro_state_
#define KIT_AF_INITIAL(id_, coro_) \
._index = 0, ._id = (id_), ._state_machine = (coro_)
#define KIT_AF_CREATE(promise_, coro_, ...) \
KIT_AF_TYPE(coro_) \
promise_ = { KIT_AF_INITIAL(0, coro_), __VA_ARGS__ }
#define KIT_AF_CREATE_ID(promise_, id_, ...) \
KIT_AF_TYPE(coro_) \
promise_ = { KIT_AF_INITIAL(id_, NULL), __VA_ARGS__ }
#define KIT_AF_INIT(promise_, coro_, ...) \
do { \
KIT_AF_CREATE(kit_af_temp_, coro_, __VA_ARGS__); \
memcpy(&(promise_), &kit_af_temp_, sizeof kit_af_temp_); \
} while (0)
#define KIT_AF_INIT_ID(promise_, id_, ...) \
do { \
KIT_AF_CREATE_ID(kit_af_temp_, id_, __VA_ARGS__); \
memcpy(&(promise_), &kit_af_temp_, sizeof kit_af_temp_); \
} while (0)
#define KIT_AF_FINISHED(promise_) ((promise_)._index == -1)
#define KIT_AF_FINISHED_N(return_, promises_, size_) \
do { \
i32 kit_af_index_; \
(return_) = 1; \
for (kit_af_index_ = 0; kit_af_index_ < (size_); \
kit_af_index_++) \
if (!KIT_AF_FINISHED((promises_)[kit_af_index_])) { \
(return_) = 0; \
break; \
} \
} while (0)
#define KIT_AF_FINISHED_ALL(return_, promises_) \
KIT_AF_FINISHED_N((return_), (promises_), \
sizeof(promises_) / sizeof((promises_)[0]))
#ifdef __cplusplus
}
#endif
#define af_void kit_af_void
#define af_state_machine kit_af_state_machine
#define af_type_void kit_af_type_void
#define AF_STATE_DATA KIT_AF_STATE_DATA
#define AF_STATE KIT_AF_STATE
#define AF_DECL KIT_AF_DECL
#define CORO_IMPL KIT_CORO_IMPL
#define CORO_END KIT_CORO_END
#define CORO_DECL KIT_CORO_DECL
#define CORO KIT_CORO
#define CORO_DECL_VOID KIT_CORO_DECL_VOID
#define STATIC_CORO KIT_STATIC_CORO
#define STATIC_CORO_VOID KIT_STATIC_CORO_VOID
#define CORO_VOID KIT_CORO_VOID
#define AF_EXECUTE KIT_AF_EXECUTE
#define AF_NEXT KIT_AF_NEXT
#define AF_YIELD KIT_AF_YIELD
#define AF_YIELD_VOID KIT_AF_YIELD_VOID
#define AF_RETURN KIT_AF_RETURN
#define AF_RETURN_VOID KIT_AF_RETURN_VOID
#define AF_AWAIT KIT_AF_AWAIT
#define AF_YIELD_AWAIT KIT_AF_YIELD_AWAIT
#define AF_TYPE KIT_AF_TYPE
#define AF_INITIAL KIT_AF_INITIAL
#define AF_CREATE KIT_AF_CREATE
#define AF_INIT KIT_AF_INIT
#define AF_FINISHED KIT_AF_FINISHED
#define AF_FINISHED_N KIT_AF_FINISHED_N
#define AF_FINISHED_ALL KIT_AF_FINISHED_ALL
#endif
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