#include "internal.h"

/* Co-routine context */
Coro*
coro·make(uintptr stk, uintptr (*func)(Coro*, uintptr))
{
    if (!func) return nil;
    if (stk == 0) stk = 8192;

    byte *block = malloc(stk);
    Coro *co    = (Coro*)&block[stk - sizeof(Coro)];
    co->bp      = block;
    co->size    = stk;

    _newcoro(co, func, co);
    return co;
}

error
coro·free(Coro *co)
{
    enum 
    {
        NIL,
        GOOD,
        EMPTY,
        LOST,
    };

    if (!co)           return NIL;
    if (!co->bp)       return LOST;
    if (co->size == 0) return EMPTY;

    free(co->bp);

    return GOOD;
}

uintptr
coro·yield(Coro *c, uintptr arg)
{
    return _coroyield(c, arg);
}