зеркало из https://github.com/github/ruby.git
76 строки
2.1 KiB
C
76 строки
2.1 KiB
C
#ifndef COROUTINE_WIN64_CONTEXT_H
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#define COROUTINE_WIN64_CONTEXT_H 1
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/*
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* This file is part of the "Coroutine" project and released under the MIT License.
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*
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* Created by Samuel Williams on 10/5/2018.
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* Copyright, 2018, by Samuel Williams.
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*/
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#pragma once
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#include <assert.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <string.h>
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#define COROUTINE __declspec(noreturn) void
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enum {
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COROUTINE_REGISTERS = 8,
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COROUTINE_XMM_REGISTERS = 1+10*2,
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};
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struct coroutine_context
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{
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void **stack_pointer;
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void *argument;
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};
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typedef void(* coroutine_start)(struct coroutine_context *from, struct coroutine_context *self);
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void coroutine_trampoline(void);
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static inline void coroutine_initialize_main(struct coroutine_context * context) {
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context->stack_pointer = NULL;
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}
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static inline void coroutine_initialize(
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struct coroutine_context *context,
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coroutine_start start,
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void *stack,
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size_t size
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) {
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assert(start && stack && size >= 1024);
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// Stack grows down. Force 16-byte alignment.
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char * top = (char*)stack + size;
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context->stack_pointer = (void**)((uintptr_t)top & ~0xF);
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/* Win64 ABI requires space for arguments */
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context->stack_pointer -= 4;
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/* Return address */
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*--context->stack_pointer = 0;
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*--context->stack_pointer = (void*)(uintptr_t)start;
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*--context->stack_pointer = (void*)coroutine_trampoline;
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/* Windows Thread Information Block */
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/* *--context->stack_pointer = 0; */ /* gs:[0x00] is not used */
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*--context->stack_pointer = (void*)top; /* gs:[0x08] */
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*--context->stack_pointer = (void*)stack; /* gs:[0x10] */
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context->stack_pointer -= COROUTINE_REGISTERS;
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memset(context->stack_pointer, 0, sizeof(void*) * COROUTINE_REGISTERS);
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memset(context->stack_pointer - COROUTINE_XMM_REGISTERS, 0, sizeof(void*) * COROUTINE_XMM_REGISTERS);
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}
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struct coroutine_context * coroutine_transfer(struct coroutine_context * current, struct coroutine_context * target);
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static inline void coroutine_destroy(struct coroutine_context * context)
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{
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}
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#endif /* COROUTINE_WIN64_CONTEXT_H */
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