include/types/shctx.h

#ifndef __TYPES_SHCTX
#define __TYPES_SHCTX

#ifndef SHSESS_BLOCK_MIN_SIZE
#define SHSESS_BLOCK_MIN_SIZE 128
#endif

#ifndef SHSESS_MAX_DATA_LEN
#define SHSESS_MAX_DATA_LEN 4096
#endif

#ifndef SHCTX_APPNAME
#define SHCTX_APPNAME "haproxy"
#endif

#define SHCTX_E_ALLOC_CACHE -1
#define SHCTX_E_INIT_LOCK   -2

#define SHCTX_F_REMOVING 0x1      /* Removing flag, does not accept new */

/* generic shctx struct */
struct shared_block {
	struct list list;
	unsigned int len;          /* data length for the row */
	unsigned int block_count;  /* number of blocks */
	unsigned int refcount;
	struct shared_block *last_reserved;
	struct shared_block *last_append;
	unsigned char data[0];
};

struct shared_context {
#ifndef USE_PRIVATE_CACHE
#ifdef USE_PTHREAD_PSHARED
	pthread_mutex_t mutex;
#else
	unsigned int waiters;
#endif
#endif
	struct list avail;  /* list for active and free blocks */
	struct list hot;     /* list for locked blocks */
	unsigned int nbav;  /* number of available blocks */
	unsigned int max_obj_size;   /* maximum object size (in bytes). */
	void (*free_block)(struct shared_block *first, struct shared_block *block);
	short int block_size;
	unsigned char data[0];
};

#endif