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#ifndef __CHAIN_H__
#define __CHAIN_H__
/*
* Concomitant control chain (CCC)
* Theory and code by Jorge Arellano Cid <jcid@dillo.org>
*/
/*
* Supported CCC operations
*/
#define OpStart 1
#define OpSend 2
#define OpStop 3
#define OpEnd 4
#define OpAbort 5
/*
* CCC flags
*/
#define CCC_Stopped (1 << 0)
#define CCC_Ended (1 << 1)
#define CCC_Aborted (1 << 2)
/*
* Linking direction
*/
#define FWD 1
#define BCK 2
typedef struct _ChainLink ChainLink;
typedef struct _DataBuf DataBuf;
typedef void (*ChainFunction_t)(int Op, int Branch, int Dir, ChainLink *Info,
void *Data1, void *Data2);
/* This is the main data structure for CCC nodes */
struct _ChainLink {
void *LocalKey;
int Flags;
ChainLink *FcbInfo;
ChainFunction_t Fcb;
int FcbBranch;
ChainLink *BcbInfo;
ChainFunction_t Bcb;
int BcbBranch;
};
/* A convenience data structure for passing data chunks between nodes */
struct _DataBuf {
char *Buf;
int Size;
int Code;
};
/*
* Function prototypes
*/
ChainLink *a_Chain_new(void);
ChainLink *a_Chain_link_new(ChainLink *AInfo, ChainFunction_t AFunc,
int Direction, ChainFunction_t BFunc,
int AtoB_branch, int BtoA_branch);
void a_Chain_unlink(ChainLink *Info, int Direction);
int a_Chain_fcb(int Op, ChainLink *Info, void *Data1, void *Data2);
int a_Chain_bcb(int Op, ChainLink *Info, void *Data1, void *Data2);
int a_Chain_bfcb(int Op, ChainLink *Info, void *Data1, void *Data2);
int a_Chain_check(char *FuncStr, int Op, int Branch, int Dir,
ChainLink *Info);
DataBuf *a_Chain_dbuf_new(void *buf, int size, int code);
#endif /* __CHAIN_H__ */
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