Makefile.PL

  use Coro::MakeMaker qw(coro_args);

  # ... set up %args ...

  WriteMakefile (coro_args (%args));

XS

  #include "CoroAPI.h"

  BOOT:
    I_CORO_API ("YourModule");

API

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 #define CORO_TRANSFER(prev,next) /* transfer from prev to next */
 #define CORO_SCHEDULE            /* like Coro::schedule */
 #define CORO_CEDE                /* like Coro::cede */
 #define CORO_CEDE_NOTSELF        /* like Coro::cede_notself */
 #define CORO_READY(coro)         /* like $coro->ready */
 #define CORO_IS_READY(coro)      /* like $coro->is_ready */
 #define CORO_NREADY              /* # of procs in ready queue */
 #define CORO_CURRENT             /* returns $Coro::current */
 #define CORO_THROW               /* exception pending? */
 #define CORO_READYHOOK           /* hook for event libs, see Coro::EV */

 /* C-level coroutine struct, opaque, not used much */
 struct coro;

 /* used for schedule-like-function prepares */
 struct coro_transfer_args
 {
   struct coro *prev, *next;
 };

 /* this is the per-perl-coro slf frame info */
 struct CoroSLF
 {
   void (*prepare) (pTHX_ struct coro_transfer_args *ta); /* 0 means not yet initialised */
   int (*check) (pTHX_ struct CoroSLF *frame);
   void *data; /* for use by prepare/check/destroy */
   void (*destroy) (pTHX_ struct CoroSLF *frame);
 };

 /* needs to fill in the *frame */
 typedef void (*coro_slf_cb) (pTHX_ struct CoroSLF *frame, CV *cv, SV **arg, int items);

 #define CORO_SV_STATE(coro)      /* returns the internal struct coro * */
 #define CORO_EXECUTE_SLF(cv,init,ax) /* execute a schedule-like function */
 #define CORO_EXECUTE_SLF_XS(init) /* SLF in XS, see e.g. Coro::EV */

 /* called on enter/leave */
 typedef void (*coro_enterleave_hook) (pTHX_ void *arg);

 #define CORO_ENTERLEAVE_HOOK(coro,enter,enter_arg,leave,leave_arg)   /* install an XS-level enter/leave hook */
 #define CORO_ENTERLEAVE_UNHOOK(coro,enter,leave)                     /* remove an XS-level enter/leave hook */
 #define CORO_ENTERLEAVE_SCOPE_HOOK(enter,enter_arg,leave,leave_arg)  /* install an XS-level enter/leave hook for the corrent scope */