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/* 
|| This file is part of Pike. For copyright information see COPYRIGHT. 
|| Pike is distributed under GPL, LGPL and MPL. See the file COPYING 
|| for more information. 
*/ 
 
#ifndef CYCLIC_H 
#define CYCLIC_H 
 
#include "pike_error.h" 
#include "threads.h" 
 
/* #define CYCLIC_DEBUG */ 
 
typedef struct CYCLIC 
{ 
  ONERROR onerr; 
  void *th; 
  char *id; 
  void *a,*b; 
  void *ret; 
  struct CYCLIC *next; 
} CYCLIC; 
 
 
#ifdef CYCLIC_DEBUG 
 
#define DECLARE_CYCLIC()                                              \ 
  static char cyclic_identifier__[] = __FILE__ ":" DEFINETOSTR(__LINE__); \ 
  CYCLIC cyclic_struct__ 
#define BEGIN_CYCLIC(A,B) \ 
   begin_cyclic(&cyclic_struct__, cyclic_identifier__, \ 
                THREAD_T_TO_PTR(th_self()), (void *)(A), (void *)(B)) 
#define LOW_BEGIN_CYCLIC(A,B) \ 
   low_begin_cyclic(&cyclic_struct__, cyclic_identifier__, \ 
                    THREAD_T_TO_PTR(th_self()), (void *)(A), (void *)(B)) 
 
#else  /* CYCLIC_DEBUG */ 
 
#define DECLARE_CYCLIC()         \ 
  static char cyclic_identifier__; \ 
  CYCLIC cyclic_struct__ 
#define BEGIN_CYCLIC(A,B) \ 
   begin_cyclic(&cyclic_struct__, &cyclic_identifier__, \ 
                THREAD_T_TO_PTR(th_self()), (void *)(A), (void *)(B)) 
#define LOW_BEGIN_CYCLIC(A,B) \ 
   low_begin_cyclic(&cyclic_struct__, &cyclic_identifier__, \ 
                    THREAD_T_TO_PTR(th_self()), (void *)(A), (void *)(B)) 
 
#endif        /* !CYCLIC_DEBUG */ 
 
#define SET_CYCLIC_RET(RET) \ 
   cyclic_struct__.ret=(void *)(RET) 
 
#define END_CYCLIC()  unlink_cyclic(&cyclic_struct__) 
#define LOW_END_CYCLIC()  low_unlink_cyclic(&cyclic_struct__) 
 
/* Prototypes begin here */ 
void low_unlink_cyclic(CYCLIC *c); 
PMOD_EXPORT void unlink_cyclic(CYCLIC *c); 
void *low_begin_cyclic(CYCLIC *c, 
                       char *id, 
                       void *thread, 
                       void *a, 
                       void *b); 
PMOD_EXPORT void *begin_cyclic(CYCLIC *c, 
                               char *id, 
                               void *thread, 
                               void *a, 
                               void *b); 
/* Prototypes end here */ 
 
#endif /* CYCLIC_H */