Some examples for coroutine (tbox)
原文链接 https://waruqi.github.io/2016/10/29/coroutine-switch/
注:以下为加速网络访问所做的原文缓存,经过重新格式化,可能存在格式方面的问题,或偶有遗漏信息,请以原文为准。
tbox add a coroutine library with stackfull mode and provide the following features.
1. yield
2. suspend and resume
3. sleep
4. io scheduler with (epoll, poll, kqueue, select, poll ..)
5. supports stream, http and other all io modules of tbox
6. channel
7. lock
8. semaphore
yield
static tb_void_t switchfunc(tb_cpointer_t priv)
{
tb_size_t count = (tb_size_t)priv;
while (count--)
{
// trace
tb_trace_i("[coroutine: %p]: %lu", tb_coroutine_self(), count);
// yield
tb_coroutine_yield();
}
}
tb_int_t main(tb_int_t argc, tb_char_t** argv)
{
// init tbox
if (!tb_init(tb_null, tb_null)) return -1;
// init scheduler
tb_co_scheduler_ref_t scheduler = tb_co_scheduler_init();
if (scheduler)
{
// start coroutine with the default stack size
tb_coroutine_start(scheduler, switchfunc, (tb_cpointer_t)10, 0);
// start coroutine with stack size (8192)
tb_coroutine_start(scheduler, switchfunc, (tb_cpointer_t)10, 8192);
// run scheduler loop
tb_co_scheduler_loop(scheduler, tb_true);
// exit scheduler
tb_co_scheduler_exit(scheduler);
}
// exit tbox
tb_exit();
}
sleep
We can uses tb_sleep(), tb_msleep() or tb_coroutine_sleep() to sleep some times.
static tb_void_t sleepfunc(tb_cpointer_t priv)
{
while (1)
{
tb_msleep(10);
}
}
resume and suspend
Unlike yield(), the suspended coroutine will never be scheduled until it is resumed.
And we can pass some private data without channel between resume() and suspend()
static tb_void_t resumefunc(tb_cpointer_t priv)
{
// get coroutine of suspendfunc()
tb_coroutine_ref_t coroutine = (tb_coroutine_ref_t)priv;
// resume the given coroutine to pass "hello suspend!"
tb_char_t const* retval = tb_coroutine_resume(coroutine, "hello suspend!");
// retval is "hello resume!"
}
static tb_void_t suspendfunc(tb_cpointer_t priv)
{
// start coroutine of resumefunc()
tb_coroutine_start(tb_null, resumefunc, tb_coroutine_self(), 0);
// suspend current coroutine and pass "hello resume!" to resumefunc()
tb_char_t const* retval = tb_coroutine_suspend("hello resume!");
// retval is "hello suspend!"
}