Ruby 2.7.0p0(2019-12-25revision647ee6f091eafcce70ffb75ddf7e121e192ab217)

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 __fastcall
14 #define COROUTINE_LIMITED_ADDRESS_SPACE
15
16 /* This doesn't include thread information block */
17 enum {COROUTINE_REGISTERS = 4};
18
19 struct coroutine_context
20 {
21 void **stack_pointer;
22 };
23
24 typedef void(__fastcall * coroutine_start)(struct coroutine_context *from, struct coroutine_context *self);
25
26 static inline void coroutine_initialize_main(struct coroutine_context * context) {
27 context->stack_pointer = NULL;
28 }
29
30 static inline void coroutine_initialize(
31 struct coroutine_context *context,
32 coroutine_start start,
33 void *stack,
34 size_t size
35 ) {
36 assert(start && stack && size >= 1024);
37
38 // Stack grows down. Force 16-byte alignment.
39 char * top = (char*)stack + size;
40 context->stack_pointer = (void**)((uintptr_t)top & ~0xF);
41
42 *--context->stack_pointer = (void*)start;
43
44 /* Windows Thread Information Block */
45 *--context->stack_pointer = (void*)0xFFFFFFFF; /* fs:[0] */
46 *--context->stack_pointer = (void*)top; /* fs:[4] */
47 *--context->stack_pointer = (void*)stack; /* fs:[8] */
48
49 context->stack_pointer -= COROUTINE_REGISTERS;
50 memset(context->stack_pointer, 0, sizeof(void*) * COROUTINE_REGISTERS);
51 }
52
53 struct coroutine_context * __fastcall coroutine_transfer(struct coroutine_context * current, struct coroutine_context * target);
54
55 static inline void coroutine_destroy(struct coroutine_context * context)
56 {
57 }
void
void
Definition: rb_mjit_min_header-2.7.0.h:13273
coroutine_context::stack
void * stack
Definition: Context.h:29
assert
#define assert(x)
Definition: dlmalloc.c:1176
memset
void * memset(void *, int, size_t)
COROUTINE_REGISTERS
@ COROUTINE_REGISTERS
Definition: Context.h:15
assert.h
uintptr_t
unsigned int uintptr_t
Definition: win32.h:106
NULL
#define NULL
Definition: _sdbm.c:101
__fastcall
#define __fastcall
Definition: rb_mjit_min_header-2.7.0.h:738
coroutine_start
COROUTINE(* coroutine_start)(struct coroutine_context *from, struct coroutine_context *self)
Definition: Context.h:22
coroutine_context::from
struct coroutine_context * from
Definition: Context.h:37
size
int size
Definition: encoding.c:58
coroutine_context
Definition: Context.h:17
coroutine_transfer
struct coroutine_context * coroutine_transfer(struct coroutine_context *current, struct coroutine_context *target)
Definition: Context.c:115
top
unsigned int top
Definition: nkf.c:4323
coroutine_context::stack_pointer
void ** stack_pointer
Definition: Context.h:19