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View Code? Open in Web Editor NEWA asymmetric coroutine library for C.
License: MIT License
A asymmetric coroutine library for C.
License: MIT License
_save_stack函数中dummy变量定义在coroutine_yield是不是更好?
static void
_save_stack(struct coroutine *C, char *top, char *bottom) {
//top:stack bottom:sp
assert(top - bottom <= STACK_SIZE);
if (C->cap < top - bottom) {
free(C->stack);
C->cap = top-bottom;
C->stack = malloc(C->cap);
}
C->size = top - bottom;
memcpy(C->stack, bottom, C->size);
}
void
coroutine_yield(struct schedule * S) {
int id = S->running;
assert(id >= 0);
struct coroutine * C = S->co[id];
assert((char *)&C > S->stack);
char dummy = 0;
_save_stack(C,S->stack + STACK_SIZE, &dummy);
C->status = COROUTINE_SUSPEND;
S->running = -1;
swapcontext(&C->ctx , &S->main);
}
大佬您好 :请教一下如果代码包含了 sleep 这种挂起的动作,怎么才能让其不阻塞呢?
假设某个函数里面有不确定会sleep多久,任何一个挂起就会影响下一个的调度。应该怎么来优化一下这种问题?
#include "coroutine.h"
//
void *loop1(schedule *s, void *args)
{
printf("loop1\n");
sleep(3);
}
void *loop2(schedule *s, void *args)
{
printf("loop2\n");
sleep(2);
}
void *loop3(schedule *s, void *args)
{
printf("loop3\n");
sleep(1);
}
Mac OS 10.14.7版本。
gcc info:
Configured with: --prefix=/Library/Developer/CommandLineTools/usr --with-gxx-include-dir=/Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include/c++/4.2.1
Apple LLVM version 10.0.1 (clang-1001.0.46.4)
Target: x86_64-apple-darwin18.2.0
Thread model: posix
InstalledDir: /Library/Developer/CommandLineTools/usr/bin
在这个版本上编译,并运行代码生成的main 以后程序报告:
Assertion failed: (0), function coroutine_resume, file coroutine.c, line 155.
然后通过跟踪发现,main.c 里面
struct args arg1 = { 0 };
struct args arg2 = { 100 };
int co1 = coroutine_new(S, foo, &arg1);
int co2 = coroutine_new(S, foo, &arg2);
发现一个问题, struct coroutine 这个结构体的成员 ud 在程序resume coroutine的 co2的时候被修改了。
any idea for this?
使用QtCreator编辑安卓项目
安卓平台支持ucontext_t,但是不支持setcontext, swapcontext等函数,有没有什么办法在安卓平台上使用本库?
Hi cloud,
I have a problem when compile with gcc and run on macosx10.8 using the example main.c.
Because of ucontext.h, I try to change the include(using sys/ucontext.h instand of ucontext.h):
then complie succ, but execute with some exception. co[1]->status had changed when coroutine_resume() it. so coroutine_resume():default assert(0) running...
I try to gdb and watch the variable of co[1]->status, but nothing to find...
so ... I'm deep appreciate of yours help, or any suggest.
diff --git a/coroutine.c b/coroutine.c index 7afdc1c..5470d0d 100644 --- a/coroutine.c +++ b/coroutine.c @@ -81,7 +81,7 @@ coroutine_new(struct schedule *S, coroutine_func func, void *ud) { struct coroutine *co = _co_new(S, func , ud); if (S->nco >= S->cap) { int id = S->cap; - S->cap *= 2; + //S->cap *= 2; S->co = realloc(S->co, S->cap * 2 * sizeof(struct coroutine *)); memset(S->co + S->cap , 0 , sizeof(struct coroutine *) * S->cap); S->co[S->cap] = co;
比如一个 schedule 里面有 100个 stack,每个 2MB,一共 200MB,每个栈,管理一组 coroutine
假设有 5000个 coroutine ,平均分布在 100组栈上,每组栈 50个 coroutine。
coroutine 被切走的时候,并不会马上拷贝栈,而会保留在那一个栈上,直到同一组的 coroutine 需要resume,才会把之前 on-stack 的 coroutine 拷贝走。
这样每个 stack 上保留的 coroutine 都是最近最活跃的 coroutine,栈拷贝的次数下降100倍。
在osX下,程序在coroutine.c 150行,运行到assert(0)退出。在linux下正常运行。
#define _XOPEN_SOURCE
#if APPLE && MACH
#include <ucontext.h>
#else
#include <sys/ucontext.h>
#endif
在mac上 加上这个才能编译 运行成功
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