1 files changed, 64 insertions, 0 deletions
diff --git a/coroutine/win32/Context.h b/coroutine/win32/Context.h
new file mode 100644
index 0000000000..e5283cd4b0
--- /dev/null
+++ b/coroutine/win32/Context.h
@@ -0,0 +1,64 @@
+//
+//  win32.h
+//  File file is part of the "Coroutine" project and released under the MIT License.
+//
+//  Created by Samuel Williams on 10/5/2018.
+//  Copyright, 2018, by Samuel Williams. All rights reserved.
+//
+
+#pragma once
+
+#include <assert.h>
+#include <string.h>
+
+#if __cplusplus
+extern "C" {
+#endif
+
+#define COROUTINE void __fastcall
+
+const size_t COROUTINE_REGISTERS = 4;
+
+// The fiber context (stack pointer).
+struct coroutine_context
+{
+	void **stack_pointer;
+};
+
+// The initialization function.
+typedef void(__fastcall * coroutine_start)(coroutine_context *from, coroutine_context *self);
+
+inline void coroutine_initialize(
+	coroutine_context *context,
+	coroutine_start start,
+	void *stack_pointer,
+	size_t stack_size
+) {
+	context->stack_pointer = (void**)stack_pointer;
+
+	if (!start) {
+		assert(!context->stack_pointer);
+		/* We are main coroutine for this thread */
+		return;
+	}
+
+	/* Windows Thread Information Block */
+	*--context->stack_pointer = 0;
+	*--context->stack_pointer = stack_pointer;
+	*--context->stack_pointer = (void*)stack_size;
+
+	*--context->stack_pointer = (void*)start;
+
+	context->stack_pointer -= COROUTINE_REGISTERS;
+	memset(context->stack_pointer, 0, sizeof(void*) * COROUTINE_REGISTERS);
+}
+
+coroutine_context * __fastcall coroutine_transfer(coroutine_context * current, coroutine_context * target);
+
+inline void coroutine_destroy(coroutine_context * context)
+{
+}
+
+#if __cplusplus
+}
+#endif
+\ No newline at end of file