Ruby 2.7.7p221 (2022-11-24 revision 168ec2b1e5ad0e4688e963d9de019557c78feed9)
Context.h
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1/*
2 * This file is part of the "Coroutine" project and released under the MIT License.
3 *
4 * Created by Samuel Williams on 10/5/2018.
5 * Copyright, 2018, by Samuel Williams. All rights reserved.
6*/
7
8#pragma once
9
10#include <assert.h>
11#include <string.h>
12
13#define COROUTINE __declspec(noreturn) void
14
15enum {
18};
19
21{
22 void **stack_pointer;
23};
24
26
28
29static inline void coroutine_initialize_main(struct coroutine_context * context) {
30 context->stack_pointer = NULL;
31}
32
33static inline void coroutine_initialize(
34 struct coroutine_context *context,
35 coroutine_start start,
36 void *stack,
37 size_t size
38) {
39 assert(start && stack && size >= 1024);
40
41 // Stack grows down. Force 16-byte alignment.
42 char * top = (char*)stack + size;
43 context->stack_pointer = (void**)((uintptr_t)top & ~0xF);
44
45 /* Win64 ABI requires space for arguments */
46 context->stack_pointer -= 4;
47
48 /* Return address */
49 *--context->stack_pointer = 0;
50 *--context->stack_pointer = (void*)start;
51 *--context->stack_pointer = (void*)coroutine_trampoline;
52
53 /* Windows Thread Information Block */
54 /* *--context->stack_pointer = 0; */ /* gs:[0x00] is not used */
55 *--context->stack_pointer = (void*)top; /* gs:[0x08] */
56 *--context->stack_pointer = (void*)stack; /* gs:[0x10] */
57
59 memset(context->stack_pointer, 0, sizeof(void*) * COROUTINE_REGISTERS);
61}
62
63struct coroutine_context * coroutine_transfer(struct coroutine_context * current, struct coroutine_context * target);
64
65static inline void coroutine_destroy(struct coroutine_context * context)
66{
67}
COROUTINE(* coroutine_start)(struct coroutine_context *from, struct coroutine_context *self)
Definition: Context.h:22
struct coroutine_context * coroutine_transfer(struct coroutine_context *current, struct coroutine_context *target)
Definition: Context.c:136
@ COROUTINE_REGISTERS
Definition: Context.h:15
unsigned int top
Definition: nkf.c:4323
#define NULL
() void(cc->call !=vm_call_general)
void * memset(void *, int, size_t)
unsigned int size
__uintptr_t uintptr_t
#define assert
struct coroutine_context * from
Definition: Context.h:37
void ** stack_pointer
Definition: Context.h:19
void * stack
Definition: Context.h:29
COROUTINE coroutine_trampoline(void *_start, void *_context)
Definition: Context.c:16
@ COROUTINE_XMM_REGISTERS
Definition: Context.h:17