Reworking the build system

1 files changed, 241 insertions, 0 deletions

diff --git a/kit/async_function.h b/kit/async_function.h
new file mode 100644
index 0000000..5460fd6
--- /dev/null
+++ b/kit/async_function.h
@@ -0,0 +1,241 @@
+#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