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Initial effort to support 32-bit Linux.

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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@65847 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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samuel 2018-11-20 10:13:59 +00:00
parent ff86d1b61b
commit 3e9beaf72b
3 changed files with 105 additions and 0 deletions
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61
coroutine/x86/Context.h Normal file
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//
// File file is part of the "Coroutine" project and released under the MIT License.
//
// Created by Samuel Williams on 3/11/2018.
// Copyright, 2018, by Samuel Williams. All rights reserved.
//
#pragma once
#include <assert.h>
#include <string.h>
#if __cplusplus
extern "C" {
#endif
#define COROUTINE void __attribute__((fastcall))
const size_t COROUTINE_REGISTERS = 4;
// The fiber context (stack pointer).
typedef struct
{
void **stack_pointer;
} coroutine_context;
// The initialization function.
typedef void(* coroutine_start)(coroutine_context *from, coroutine_context *self) __attribute__((fastcall));
void coroutine_initialize(
coroutine_context *context,
coroutine_start start,
void *stack_pointer,
size_t stack_size
) {
/* Force 16-byte alignment */
context->stack_pointer = (void**)((uintptr_t)stack_pointer & ~0xF);
if (!start) {
assert(!context->stack_pointer);
/* We are main coroutine for this thread */
return;
}
*--context->stack_pointer = NULL;
*--context->stack_pointer = (void*)start;
context->stack_pointer -= COROUTINE_REGISTERS;
memset(context->stack_pointer, 0, sizeof(void*) * COROUTINE_REGISTERS);
}
coroutine_context * coroutine_transfer(coroutine_context * current, coroutine_context * target) __attribute__((fastcall));
inline void coroutine_destroy(coroutine_context * context)
{
context->stack_pointer = NULL;
}
#if __cplusplus
}
#endif